Advanced

Standards

Feature Table

The design of the feature table in xlsx format refers to the TBL in text format from NCBI . Consistent with TBL, xlsx's annotation of sequences follows the INSDC standard. Users can get tips from different feature and qualifier combinations in the table, including examples, formats and their definitions.

Locations

1) Chr.

Header of each sequence, starting with the Feature field

2) Start and end.

Start and end coordinates of each feature in the sequence

Coordinate should be a value of integer type

If the end is greater than the starting coordinate, the feature is considered to be located in the reverse strand of the sequence

3) Completeness

Whether the feature is complete. For example, if it is a coding gene, all CDS features of the gene should be divided by 3.

If incomplete, mark the incomplete direction, 5 ', 3', or both ends.

Attributes

1) Feature

Name of feature within the coordinate range.

All available features are listed in the drop-down box.

For the feature name within the coordinate range, we suggest that each coding locus should have [gene] features as the basic unit, even if the feature can be omitted in some cases.

If the feature has more than one qualifier, the feature column should be empty when these qualifiers are listed under the feature, which indicates that these qualifiers belong to the same feature block.

2) Qualifier

Annotations for multiple dimensions of the feature

All available qualifiers of this feature are listed in the drop-down box after selecting the corresponding feature.

We hope you can describe the characteristics of this locus in as much detail as possible, even though this position can sometimes be omitted.

When there is more than one qualifier, all qualifiers should be listed below the line declaring the feature, and the feature column on the left should be empty.

3) Qualifier value

After declaring the corresponding qualifier, the user should fill in the specific contents of the qualifier

The user can be prompted in qualifier hints for the filling specification and definition of this value.

Qualifier hints

1) Type and example

For each qualifier, qualifier hints give written suggestions including examples, formats and definitions according to the INSDC standard.

[Qualifier hints] are only used for type hints. No matter what its content is, it will not affect the format verification and conversion of xlsx

Description of each feature

1) 3'UTR
Definition Feature Qualifiers Type Comment
1) region at the 3' end of a mature transcript (following the stop codon) that is not translated into a protein; 2) region at the 3' end of an RNA virus (following the last stop codon) that is not translated into a protein;3'UTRalleletextNA
citation[number]
db_xref<database>:<identifier>
experiment[CATEGORY:]text
functiontext
genetext
gene_synonymtext
inference[CATEGORY:]TYPE[ (same species)][:EVIDENCE_BASIS]
locus_tagtext (single token)
maptext
notetext
old_locus_tagtext (single token)
standard_nametext
trans_splicingboolean
2) 5'UTR
Definition Feature Qualifiers Type Comment
1) region at the 5' end of a mature transcript (preceding the initiation codon) that is not translated into a protein; 2) region at the 5' end of an RNA virus genome (preceding the first initiation codon) that is not translated into a protein;5'UTRalleletextNA
citation[number]
db_xref<database>:<identifier>
experiment[CATEGORY:]text
functiontext
genetext
gene_synonymtext
inference[CATEGORY:]TYPE[ (same species)][:EVIDENCE_BASIS]
locus_tagtext (single token)
maptext
notetext
old_locus_tagtext (single token)
standard_nametext
trans_splicingboolean
3) CDS
Definition Feature Qualifiers Type Comment
coding sequence; sequence of nucleotides that corresponds with the sequence of amino acids in a protein (location includes stop codon); feature includes amino acid conceptual translation.CDSartificial_location[artificial_location_value]/codon_start has valid value of 1 or 2 or 3, indicating the offset at which the first complete codon of a coding feature can be found, relative to the first base of that feature; /transl_table defines the genetic code table used if other than the universal genetic code table; genetic code exceptions outside the range of the specified tables is reported in /transl_except qualifier; /protein_id consists of a stable ID portion (from the end of 2018 new accessions may be extended to a 3+7 accession format with 3 position letters and 7 numbers; existing data before the end of 2018 uses a 3+5 format) plus a version number after the decimal point; when the protein sequence encoded by the CDS changes, only the version number of the /protein_id value is incremented; the stable part of the /protein_id remains unchanged and as a result will permanently be associated with a given protein;
circular_RNAboolean
citation[number]
codon_start<1 or 2 or 3>
db_xref&lt;database&gt;:&lt;identifier&gt;
EC_numbertext
exception[exception_value]
experiment[CATEGORY:]text
functiontext
genetext
gene_synonymtext
inference[CATEGORY:]TYPE[ (same species)][:EVIDENCE_BASIS]
locus_tagtext (single token)
maptext
notetext
numberunquoted text (single token)
old_locus_tagtext (single token)
operontext
producttext
protein_id<identifier>
pseudoboolean
pseudogeneTYPE
ribosomal_slippageboolean
standard_nametext
translationtext
transl_except(pos:<location>,aa:<amino_acid>)
transl_table<integer>
trans_splicingboolean
4) C_region
Definition Feature Qualifiers Type Comment
constant region of immunoglobulin light and heavy chains, and T-cell receptor alpha, beta, and gamma chains; includes one or more exons depending on the particular chainC_regionalleletextNA
citation[number]
db_xref&lt;database&gt;:&lt;identifier&gt;
experiment[CATEGORY:]text
functiontext
genetext
gene_synonymtext
inference[CATEGORY:]TYPE[ (same species)][:EVIDENCE_BASIS]
locus_tagtext (single token)
maptext
notetext
old_locus_tagtext (single token)
producttext
pseudoboolean
pseudogeneTYPE
standard_nametext
5) D-loop
Definition Feature Qualifiers Type Comment
displacement loop; a region within mitochondrial DNA in which a short stretch of RNA is paired with one strand of DNA, displacing the original partner DNA strand in this region; also used to describe the displacement of a region of one strand of duplex DNA by a single stranded invader in the reaction catalyzed by RecA proteinD-loopalleletextNA
citation[number]
db_xref&lt;database&gt;:&lt;identifier&gt;
experiment[CATEGORY:]text
functiontext
genetext
gene_synonymtext
inference[CATEGORY:]TYPE[ (same species)][:EVIDENCE_BASIS]
locus_tagtext (single token)
maptext
notetext
old_locus_tagtext (single token)
6) D_segment
Definition Feature Qualifiers Type Comment
Diversity segment of immunoglobulin heavy chain, and T-cell receptor beta chain; D_segmentalleletextNA
citation[number]
db_xref&lt;database&gt;:&lt;identifier&gt;
experiment[CATEGORY:]text
functiontext
genetext
gene_synonymtext
inference[CATEGORY:]TYPE[ (same species)][:EVIDENCE_BASIS]
locus_tagtext (single token)
maptext
notetext
old_locus_tagtext (single token)
producttext
pseudotext
pseudogeneTYPE
standard_nametext
7) J_segment
Definition Feature Qualifiers Type Comment
joining segment of immunoglobulin light and heavy chains, and T-cell receptor alpha, beta, and gamma chains;J_segmentalleletextNA
citation[number]
db_xref&lt;database&gt;:&lt;identifier&gt;
experiment[CATEGORY:]text
genetext
gene_synonymtext
inference[CATEGORY:]TYPE[ (same species)][:EVIDENCE_BASIS]
locus_tagtext (single token)
maptext
notetext
old_locus_tagtext (single token)
producttext
pseudotext
pseudogeneTYPE
standard_nametext
8) N_region
Definition Feature Qualifiers Type Comment
extra nucleotides inserted between rearranged immunoglobulinsegments.N_regionalleletextNA
citation[number]
db_xref&lt;database&gt;:&lt;identifier&gt;
experiment[CATEGORY:]text
genetext
gene_synonymtext
inference[CATEGORY:]TYPE[ (same species)][:EVIDENCE_BASIS]
locus_tagtext (single token)
maptext
notetext
old_locus_tagtext (single token)
producttext
pseudotext
pseudogeneTYPE
standard_nametext
9) STS
Definition Feature Qualifiers Type Comment
sequence tagged site; short, single-copy DNA sequence that characterizes a mapping landmark on the genome and can be detected by PCR; a region of the genome can be mapped by determining the order of a series of STSs;STSalleletextSTS location to include primer(s) in primer_bind key or primers.
citation[number]
db_xref&lt;database&gt;:&lt;identifier&gt;
experiment[CATEGORY:]text
genetext
gene_synonymtext
inference[CATEGORY:]TYPE[ (same species)][:EVIDENCE_BASIS]
locus_tagtext (single token)
maptext
notetext
old_locus_tagtext (single token)
standard_nametext
10) S_region
Definition Feature Qualifiers Type Comment
switch region of immunoglobulin heavy chains; involved in the rearrangement of heavy chain DNA leading to the expression of a different immunoglobulin class from the same B-cell;S_regionalleletextSTS location to include primer(s) in primer_bind key or primers.
citation[number]
db_xref&lt;database&gt;:&lt;identifier&gt;
experiment[CATEGORY:]text
genetext
gene_synonymtext
inference[CATEGORY:]TYPE[ (same species)][:EVIDENCE_BASIS]
locus_tagtext (single token)
maptext
notetext
old_locus_tagtext (single token)
producttext
pseudotext
pseudogeneTYPE
standard_nametext
11) V_region
Definition Feature Qualifiers Type Comment
variable region of immunoglobulin light and heavy chains, and T-cell receptor alpha, beta, and gamma chains; codes for the variable amino terminal portion; can be composed of V_segments, D_segments, N_regions, and J_segments;V_regionalleletextSTS location to include primer(s) in primer_bind key or primers.
citation[number]
db_xref&lt;database&gt;:&lt;identifier&gt;
experiment[CATEGORY:]text
genetext
gene_synonymtext
inference[CATEGORY:]TYPE[ (same species)][:EVIDENCE_BASIS]
locus_tagtext (single token)
maptext
notetext
old_locus_tagtext (single token)
producttext
pseudotext
pseudogeneTYPE
standard_nametext
12) V_segment
Definition Feature Qualifiers Type Comment
variable segment of immunoglobulin light and heavy chains, and T-cell receptor alpha, beta, and gamma chains; codes for most of the variable region (V_region) and the last few amino acids of the leader peptide;V_segmentalleletextTS location to include primer(s) in primer_bind key or primers.
citation[number]
db_xref&lt;database&gt;:&lt;identifier&gt;
experiment[CATEGORY:]text
genetext
gene_synonymtext
inference[CATEGORY:]TYPE[ (same species)][:EVIDENCE_BASIS]
locus_tagtext (single token)
maptext
notetext
old_locus_tagtext (single token)
producttext
pseudotext
pseudogeneTYPE
standard_nametext
13) assembly_gap
Definition Feature Qualifiers Type Comment
gap between two components of a genome or transcriptome assembly;assembly_gap(Mandatory) estimated_lengthunknown or &lt;integer&gt;the location span of the assembly_gap feature for an unknown gap has to be specified by the submitter; the specified gap length has to be reasonable (less or = 1000) and will be indicated as "n"'s in sequence. However, the value for the estimated_length of assembly_gap features within a single (non-CON) transcriptome record must be an integer and can not be "unknown";
(Mandatory) gap_typeis "within scaffold", "repeat within scaffold" or "contamination". If there are multiple types of linkage_evidence they will appear as multiple
(Mandatory) gap_typeis "within scaffold", "repeat within scaffold" or "contamination". If there are multiple types of linkage_evidence they will appear as multiple
14) centromere
Definition Feature Qualifiers Type Comment
region of biological interest identified as a centromere and which has been experimentally characterized;centromerecitation[number]the centromere feature describes the interval of DNA thatcorresponds to a region where chromatids are held and a kinetochore is formed
db_xref&lt;database&gt;:&lt;identifier&gt;
experiment[CATEGORY:]text
inference[CATEGORY:]TYPE[ (same species)][:EVIDENCE_BASIS]
notetext
standard_nametext
15) exon
Definition Feature Qualifiers Type Comment
region of genome that codes for portion of spliced mRNA, rRNA and tRNA; may contain 5'UTR, all CDSs and 3' UTR; exonalleletextSTS location to include primer(s) in primer_bind key or primers.
citation[number]
db_xref&lt;database&gt;:&lt;identifier&gt;
EC_numbertext
experiment[CATEGORY:]text
genetext
gene_synonymtext
inference[CATEGORY:]TYPE[ (same species)][:EVIDENCE_BASIS]
locus_tagtext (single token)
maptext
notetext
numberunquoted text (single token)
old_locus_tagtext (single token)
producttext
pseudotext
pseudogeneTYPE
standard_nametext
trans_splicingboolean
16) gap
Definition Feature Qualifiers Type Comment
gap in the sequencegapexperiment[CATEGORY:]textthe location span of the gap feature for an unknown gap is 100 bp, with the 100 bp indicated as 100 "n"'s in the sequence. Where estimated length is indicated by an integer, this is indicated by the same number of "n"'s in the sequence. No upper or lower limit is set on the size of the gap.
inference[CATEGORY:]TYPE[ (same species)][:EVIDENCE_BASIS]
maptext
notetext
17) gene
Definition Feature Qualifiers Type Comment
region of biological interest identified as a gene and for which a name hasbeen assigned;genealleletextthe gene feature describes the interval of DNA that corresponds to a genetic trait or phenotype; the feature is, by definition, not strictly bound to it's positions at the ends; it is meant to represent a region where the gene is located.
citation[number]
db_xref&lt;database&gt;:&lt;identifier&gt;
experiment[CATEGORY:]text
functiontext
genetext
gene_synonymtext
inference[CATEGORY:]TYPE[ (same species)][:EVIDENCE_BASIS]
locus_tagtext (single token)
maptext
notetext
old_locus_tagtext (single token)
operontext
producttext
pseudotext
pseudogeneTYPE
phenotypetext
standard_nametext
trans_splicingboolean
18) iDNA
Definition Feature Qualifiers Type Comment
intervening DNA; DNA which is eliminated through any of several kinds of recombination;iDNAalleletexte.g., in the somatic processing of immunoglobulin genes.
citation[number]
db_xref&lt;database&gt;:&lt;identifier&gt;
experiment[CATEGORY:]text
functiontext
genetext
gene_synonymtext
inference[CATEGORY:]TYPE[ (same species)][:EVIDENCE_BASIS]
locus_tagtext (single token)
maptext
notetext
numberunquoted text (single token)
old_locus_tagtext (single token)
standard_nametext
19) intron
Definition Feature Qualifiers Type Comment
a segment of DNA that is transcribed, but removed from within the transcript by splicing together the sequences intronalleletexte.g., in the somatic processing of immunoglobulin genes.
citation[number]
db_xref&lt;database&gt;:&lt;identifier&gt;
experiment[CATEGORY:]text
functiontext
genetext
gene_synonymtext
inference[CATEGORY:]TYPE[ (same species)][:EVIDENCE_BASIS]
locus_tagtext (single token)
maptext
notetext
numberunquoted text (single token)
old_locus_tagtext (single token)
pseudotext
pseudogeneTYPE
standard_nametext
trans_splicingboolean
20) mRNA
Definition Feature Qualifiers Type Comment
messenger RNA; includes 5'untranslated region (5'UTR), coding sequences(CDS, exon) and 3'untranslated region (3'UTR);mRNAalleletextNA
artificial_location[artificial_location_value]
circular_RNAboolean
citation[number]
db_xref&lt;database&gt;:&lt;identifier&gt;
experiment[CATEGORY:]text
functiontext
genetext
gene_synonymtext
inference[CATEGORY:]TYPE[ (same species)][:EVIDENCE_BASIS]
locus_tagtext (single token)
maptext
notetext
old_locus_tagtext (single token)
operontext
producttext
pseudotext
pseudogeneTYPE
standard_nametext
trans_splicingboolean
21) mat_peptide
Definition Feature Qualifiers Type Comment
mature peptide or protein coding sequence; coding sequence for the mature or final peptide or protein product following post-translational modification; the location does not include the stop codon (unlike the corresponding CDS);mat_peptidealleletextNA
citation[number]
db_xref&lt;database&gt;:&lt;identifier&gt;
EC_numbertext
experiment[CATEGORY:]text
functiontext
genetext
gene_synonymtext
inference[CATEGORY:]TYPE[ (same species)][:EVIDENCE_BASIS]
locus_tagtext (single token)
maptext
notetext
old_locus_tagtext (single token)
producttext
pseudotext
pseudogeneTYPE
standard_nametext
22) misc_RNA
Definition Feature Qualifiers Type Comment
any transcript or RNA product that cannot be defined by other RNA keys (prim_transcript, precursor_RNA, mRNA, 5'UTR, 3'UTR, exon, CDS, sig_peptide, transit_peptide, mat_peptide, intron, polyA_site, ncRNA, rRNA and tRNA);misc_RNAalleletextNA
citation[number]
db_xref&lt;database&gt;:&lt;identifier&gt;
EC_numbertext
experiment[CATEGORY:]text
functiontext
genetext
gene_synonymtext
inference[CATEGORY:]TYPE[ (same species)][:EVIDENCE_BASIS]
locus_tagtext (single token)
maptext
notetext
old_locus_tagtext (single token)
operontext
producttext
pseudotext
pseudogeneTYPE
standard_nametext
trans_splicingboolean
23) misc_binding
Definition Feature Qualifiers Type Comment
site in nucleic acid which covalently or non-covalently binds another moiety that cannot be described by any other binding key (primer_bind or protein_bind);misc_bindingalleletextnote that feature key regulatory with /regulatory_class="ribosome_binding_site" should be used for ribosome binding sites.
citation[number]
db_xref&lt;database&gt;:&lt;identifier&gt;
experiment[CATEGORY:]text
functiontext
genetext
gene_synonymtext
inference[CATEGORY:]TYPE[ (same species)][:EVIDENCE_BASIS]
locus_tagtext (single token)
maptext
notetext
old_locus_tagtext (single token)
24) misc_difference
Definition Feature Qualifiers Type Comment
feature sequence is different from that presented in the entry and cannot be described by any other difference key (old_sequence, variation, or modified_base);misc_differencealleletextthe misc_difference feature key should be used to describe variability that arises as a result of genetic manipulation (e.g. site directed mutagenesis); use /replace="" to annotate deletion, e.g. misc_difference 412..433 /replace=""
citation[number]
clonetext
compare[accession-number.sequence-version]
db_xref&lt;database&gt;:&lt;identifier&gt;
experiment[CATEGORY:]text
genetext
gene_synonymtext
inference[CATEGORY:]TYPE[ (same species)][:EVIDENCE_BASIS]
locus_tagtext (single token)
maptext
notetext
old_locus_tagtext (single token)
phenotypetext
replacetext
standard_nametext
25) misc_feature
Definition Feature Qualifiers Type Comment
region of biological interest which cannot be described by key; a new or rare feature;misc_featurealleletextthis key should not be used when the need is merely to mark a region in order to comment on it or to use it in another feature's location
citation[number]
db_xref&lt;database&gt;:&lt;identifier&gt;
experiment[CATEGORY:]text
functiontext
genetext
gene_synonymtext
inference[CATEGORY:]TYPE[ (same species)][:EVIDENCE_BASIS]
locus_tagtext (single token)
maptext
notetext
numberunquoted text (single token)
old_locus_tagtext (single token)
phenotypetext
producttext
pseudotext
pseudogeneTYPE
standard_nametext
26) misc_recomb
Definition Feature Qualifiers Type Comment
site of any generalized, site-specific or replicative recombination event where there is a breakage and reunion of duplex DNA that cannot be described by other recombination keys or qualifiers of source key (/proviral);misc_recomballeletextNA
citation[number]
db_xref&lt;database&gt;:&lt;identifier&gt;
experiment[CATEGORY:]text
functiontext
genetext
gene_synonymtext
inference[CATEGORY:]TYPE[ (same species)][:EVIDENCE_BASIS]
locus_tagtext (single token)
maptext
notetext
old_locus_tagtext (single token)
recombination_classTYPE
standard_nametext
27) misc_structure
Definition Feature Qualifiers Type Comment
any secondary or tertiary nucleotide structure or conformation that cannot be described by other Structure keys (stem_loop and D-loop);misc_structurealleletextNA
citation[number]
db_xref&lt;database&gt;:&lt;identifier&gt;
experiment[CATEGORY:]text
functiontext
genetext
gene_synonymtext
inference[CATEGORY:]TYPE[ (same species)][:EVIDENCE_BASIS]
locus_tagtext (single token)
maptext
notetext
old_locus_tagtext (single token)
standard_nametext
28) mobile_element
Definition Feature Qualifiers Type Comment
region of genome containing mobile elements;mobile_elementalleletextNA
citation[number]
db_xref&lt;database&gt;:&lt;identifier&gt;
experiment[CATEGORY:]text
functiontext
genetext
gene_synonymtext
inference[CATEGORY:]TYPE[ (same species)][:EVIDENCE_BASIS]
locus_tagtext (single token)
maptext
notetext
old_locus_tagtext (single token)
rpt_familytext
rpt_typetext
standard_nametext
29) modified_base
Definition Feature Qualifiers Type Comment
the indicated nucleotide is a and should be substituted for by the indicated molecule (given in the mod_base qualifier value)modified_basealleletextvalue is limited to the restricted vocabulary for modified base abbreviations;
citation[number]
db_xref&lt;database&gt;:&lt;identifier&gt;
experiment[CATEGORY:]text
frequencytext
genetext
gene_synonymtext
inference[CATEGORY:]TYPE[ (same species)][:EVIDENCE_BASIS]
locus_tagtext (single token)
maptext
notetext
old_locus_tagtext (single token)
30) ncRNA
Definition Feature Qualifiers Type Comment
a non-protein-coding gene, other than ribosomal RNA and transfer molecule of which is the RNA transcript;ncRNAalleletextthe ncRNA feature is not used for ribosomal and transfer RNA annotation, for which the rRNA and tRNA feature keys should be used, respectively;
citation[number]
db_xref&lt;database&gt;:&lt;identifier&gt;
experiment[CATEGORY:]text
functiontext
genetext
gene_synonymtext
inference[CATEGORY:]TYPE[ (same species)][:EVIDENCE_BASIS]
locus_tagtext (single token)
maptext
notetext
old_locus_tagtext (single token)
operontext
producttext
pseudotext
pseudogeneTYPE
standard_nametext
trans_splicingExample
ncRNA_classTYPE
31) old_sequence
Definition Feature Qualifiers Type Comment
the presented sequence revises a previous version of the sequence at this location;old_sequencealleletext/replace="" is used to annotate deletion, e.g. old_sequence 12..15 /replace="" NOTE: This feature key is not valid in entries/records created from 15-Oct-2007.
db_xref&lt;database&gt;:&lt;identifier&gt;
experiment[CATEGORY:]text
genetext
gene_synonymtext
inference[CATEGORY:]TYPE[ (same species)][:EVIDENCE_BASIS]
locus_tagtext (single token)
maptext
notetext
old_locus_tagtext (single token)
replacetext
32) operon
Definition Feature Qualifiers Type Comment
region containing transcript including a cluster of genes that are under the control of the same regulatory sequences/promoter and in the same biological pathwayoperonalleletextNA
citation[number]
db_xref&lt;database&gt;:&lt;identifier&gt;
experiment[CATEGORY:]text
functiontext
inference[CATEGORY:]TYPE[ (same species)][:EVIDENCE_BASIS]
maptext
notetext
phenotypetext
pseudoboolean
pseudogeneTYPE
standard_nametext
33) oriT
Definition Feature Qualifiers Type Comment
origin of transfer; region of a DNA molecule where transfer is initiated during the process of conjugation or mobilizationoriTalleletextrep_origin should be used for origins of replication; /direction has legal values RIGHT, LEFT and BOTH, however only RIGHT and LEFT are valid when used in conjunction with the oriT feature; origins of transfer can be present in the chromosome; plasmids can contain multiple origins of transfer
bound_moietytext
citation[number]
db_xref&lt;database&gt;:&lt;identifier&gt;
directionvalue
experiment[CATEGORY:]text
genetext
gene_synonymtext
inference[CATEGORY:]TYPE[ (same species)][:EVIDENCE_BASIS]
locus_tagtext (single token)
maptext
notetext
old_locus_tagtext (single token)
rpt_familytext
rpt_type&lt;repeat_type&gt;
rpt_unit_range&lt;base_range&gt;
rpt_unit_seqTYPE
standard_nametext Molecule Scope DNA
34) polyA_site
Definition Feature Qualifiers Type Comment
site on an RNA transcript to which will be added post-transcriptional polyadenylation;polyA_sitealleletextNA
citation[number]
db_xref&lt;database&gt;:&lt;identifier&gt;
experiment[CATEGORY:]text
genetext
gene_synonymtext
inference[CATEGORY:]TYPE[ (same species)][:EVIDENCE_BASIS]
locus_tagtext (single token)
maptext
notetext
old_locus_tagtext (single token)
35) precursor_RNA
Definition Feature Qualifiers Type Comment
any RNA species that is not yet the mature RNA product; may include ncRNA, rRNA, tRNA, 5' untranslated region (5'UTR), coding sequences (CDS, exon), intervening sequences (intron) and 3' untranslated region (3'UTR);precursor_RNAalleletextused for RNA which may be the result of post-transcriptional processing; if the RNA in question is known not to have been processed, use the prim_transcript key.
citation[number]
db_xref&lt;database&gt;:&lt;identifier&gt;
experiment[CATEGORY:]text
functiontext
genetext
gene_synonymtext
inference[CATEGORY:]TYPE[ (same species)][:EVIDENCE_BASIS]
locus_tagtext (single token)
maptext
notetext
old_locus_tagtext (single token)
operontext
producttext
standard_nametext
trans_splicingboolean
36) prim_transcript
Definition Feature Qualifiers Type Comment
primary (initial, unprocessed) transcript; mayinclude ncRNA, rRNA, tRNA, 5' untranslated region (5'UTR), coding sequences (CDS, exon), intervening sequences (intron) and 3' untranslated region (3'UTR);prim_transcriptalleletextNA
citation[number]
db_xref&lt;database&gt;:&lt;identifier&gt;
experiment[CATEGORY:]text
functiontext
genetext
gene_synonymtext
inference[CATEGORY:]TYPE[ (same species)][:EVIDENCE_BASIS]
locus_tagtext (single token)
maptext
notetext
old_locus_tagtext (single token)
operontext
standard_nametext
37) primer_bind
Definition Feature Qualifiers Type Comment
non-covalent primer binding site for initiation of transcription, or reverse transcription; includes site(s) for synthetic e.g., PCR primer elements;primer_bindalleletextused to annotate the site on a given sequence to which a primer molecule binds - not intended to represent the sequence of the primer molecule itself; PCR components and reaction times may be stored under the "/PCR_conditions" qualifier; since PCR reactions most often involve pairs of primers, a single primer_bind key may use the order() operator with two locations, or a pair of primer_bind keys may be used.
citation[number]
db_xref&lt;database&gt;:&lt;identifier&gt;
experiment[CATEGORY:]text
genetext
gene_synonymtext
inference[CATEGORY:]TYPE[ (same species)][:EVIDENCE_BASIS]
locus_tagtext (single token)
maptext
notetext
old_locus_tagtext (single token)
standard_nametext
PCR_conditionstext
38) propeptide
Definition Feature Qualifiers Type Comment
propeptide coding sequence; coding sequence for the domain of a proprotein that is cleaved to form the mature protein product.propeptidealleletextNA
citation[number]
db_xref&lt;database&gt;:&lt;identifier&gt;
experiment[CATEGORY:]text
functiontext
genetext
gene_synonymtext
inference[CATEGORY:]TYPE[ (same species)][:EVIDENCE_BASIS]
locus_tagtext (single token)
maptext
notetext
old_locus_tagtext (single token)
producttext
pseudoboolean
pseudogeneTYPE
standard_nametext
39) protein_bind
Definition Feature Qualifiers Type Comment
non-covalent protein binding site on nucleic acid;protein_bindalleletextnote that feature key regulatory with /regulatory_class="ribosome_binding_site" should be used for ribosome binding sites.
citation[number]
db_xref&lt;database&gt;:&lt;identifier&gt;
experiment[CATEGORY:]text
functiontext
genetext
gene_synonymtext
inference[CATEGORY:]TYPE[ (same species)][:EVIDENCE_BASIS]
locus_tagtext (single token)
maptext
notetext
old_locus_tagtext (single token)
operontext
standard_nametext
40) rRNA
Definition Feature Qualifiers Type Comment
mature ribosomal RNA; RNA component of the ribonucleoprotein particle (ribosome) which assembles amino acids into proteins.rRNAalleletextrRNA sizbound_moietyes should be annotated with the /product qualifier.
citation[number]
db_xref&lt;database&gt;:&lt;identifier&gt;
experiment[CATEGORY:]text
functiontext
genetext
gene_synonymtext
inference[CATEGORY:]TYPE[ (same species)][:EVIDENCE_BASIS]
locus_tagtext (single token)
maptext
notetext
old_locus_tagtext (single token)
operontext
producttext
pseudoboolean
pseudogeneTYPE
standard_nametext
41) regulatory
Definition Feature Qualifiers Type Comment
any region of sequence that functions in the regulation of transcription, translation, replication or chromatin structure;regulatoryalleletextThis feature has replaced the following Feature Keys on 15- DEC-2014: enhancer, promoter, CAAT_signal, TATA_signal, - 35_signal, -10_signal, RBS, GC_signal, polyA_signal, attenuator, terminator, misc_signal.
bound_moietytext
citation[number]
db_xref&lt;database&gt;:&lt;identifier&gt;
experiment[CATEGORY:]text
functiontext
genetext
gene_synonymtext
inference[CATEGORY:]TYPE[ (same species)][:EVIDENCE_BASIS]
locus_tagtext (single token)
maptext
notetext
old_locus_tagtext (single token)
operontext
phenotypetext
pseudoboolean
pseudogeneTYPE
standard_nametext
42) repeat_region
Definition Feature Qualifiers Type Comment
region of genome containing repeating units;</td><td rowspan="18">repeat_regionrepeat_regionalleletextNA
citation[number]
db_xref&lt;database&gt;:&lt;identifier&gt;
experiment[CATEGORY:]text
functiontext
genetext
gene_synonymtext
inference[CATEGORY:]TYPE[ (same species)][:EVIDENCE_BASIS]
locus_tagtext (single token)
maptext
notetext
old_locus_tagtext (single token)
rpt_familytext
rpt_type&lt;repeat_type&gt;
rpt_unit_range&lt;base_range&gt;
rpt_unit_seqTYPE
satellite<satellite_type>[:<class>][ <identifier>]
standard_nametext
43) sig_peptide
Definition Feature Qualifiers Type Comment
signal peptide coding sequence; coding sequence for an N-terminal domain of a secreted protein; this domain is involved in attaching nascent polypeptide to the membrane leader sequence;sig_peptidealleletextNA
citation[number]
db_xref&lt;database&gt;:&lt;identifier&gt;
experiment[CATEGORY:]text
functiontext
genetext
gene_synonymtext
inference[CATEGORY:]TYPE[ (same species)][:EVIDENCE_BASIS]
locus_tagtext (single token)
maptext
notetext
old_locus_tagtext (single token)
producttext
pseudoboolean
pseudogeneTYPE
standard_nametext
44) stem_loop
Definition Feature Qualifiers Type Comment
hairpin; a double-helical region formed by base-pairing between adjacent (inverted) complementary sequences in a single strand of RNA or DNA.stem_loopalleletextNA
citation[number]
db_xref&lt;database&gt;:&lt;identifier&gt;
experiment[CATEGORY:]text
functiontext
genetext
gene_synonymtext
inference[CATEGORY:]TYPE[ (same species)][:EVIDENCE_BASIS]
locus_tagtext (single token)
maptext
notetext
old_locus_tagtext (single token)
operontext
standard_nametext
45) tRNA
Definition Feature Qualifiers Type Comment
mature transfer RNA, a small RNA molecule (75-85 bases long) that mediates the translation of a nucleic acid sequence into an amino acid sequence;tRNAalleletextNA
anticodon(pos:&lt;location&gt;,aa:&lt;amino_acid&gt;,seq:&lt;text&gt;)
circular_RNAboolean
citation[number]
db_xref&lt;database&gt;:&lt;identifier&gt;
experiment[CATEGORY:]text
functiontext
genetext
gene_synonymtext
inference[CATEGORY:]TYPE[ (same species)][:EVIDENCE_BASIS]
locus_tagtext (single token)
maptext
notetext
old_locus_tagtext (single token)
operontext
producttext
pseudoboolean
pseudogeneTYPE
standard_nametext
trans_splicingtext
46) telomere
Definition Feature Qualifiers Type Comment
region of biological interest identified as a telomere and which has been experimentally characterized;telomerecitation[number]the telomere feature describes the interval of DNA that corresponds to a specific structure at the end of the linear eukaryotic chromosome which is required for the integrity and maintenance of the end; this region is unique compared to the rest of the chromosome and represent the physical end of the chromosome;
db_xref&lt;database&gt;:&lt;identifier&gt;
experiment[CATEGORY:]text
notetext
inference[CATEGORY:]TYPE[ (same species)][:EVIDENCE_BASIS]
rpt_type&lt;repeat_type&gt;
rpt_unit_range&lt;base_range&gt;
rpt_unit_seqTYPE
standard_nametext
47) tmRNA
Definition Feature Qualifiers Type Comment
transfer messenger RNA; tmRNA acts as a tRNA first, and then as an mRNA that encodes a peptide tag; the ribosome translates this mRNA region of tmRNA and attaches the encoded peptide tag to the C-terminus of the unfinished protein; this attached tag targets the protein for destruction or proteolysis;tmRNAalleletextNA
citation[number]
db_xref&lt;database&gt;:&lt;identifier&gt;
experiment[CATEGORY:]text
functiontext
genetext
gene_synonymtext
inference[CATEGORY:]TYPE[ (same species)][:EVIDENCE_BASIS]
locus_tagtext (single token)
maptext
notetext
old_locus_tagtext (single token)
producttext
pseudoboolean
pseudogeneTYPE
standard_nametext
tag_peptide&lt;base_range&gt;
48) transit_peptide
Definition Feature Qualifiers Type Comment
transit peptide coding sequence; coding sequence for an N-terminal domain of a nuclear-encoded organellar protein; this domain is involved in post-translational import of the protein into the organelle;transit_peptidealleletextNA
citation[number]
db_xref&lt;database&gt;:&lt;identifier&gt;
experiment[CATEGORY:]text
functiontext
genetext
gene_synonymtext
inference[CATEGORY:]TYPE[ (same species)][:EVIDENCE_BASIS]
locus_tagtext (single token)
maptext
notetext
old_locus_tagtext (single token)
producttext
pseudoboolean
pseudogeneTYPE
standard_nametext
49) unsure
Definition Feature Qualifiers Type Comment
a small region of sequenced bases, generally 10 or fewer in its length, which could not be confidently identified. Such a region might contain called bases (A, T, G, or C), or a mixture of called-bases and uncalled-bases ('N'). The unsure feature should not be used when annotating gaps in genome assemblies. Please refer to assembly_gap feature for gaps within the sequence of an assembled genome. For annotation of gaps in other sequences than assembled genomes use the gap feature.unsurealleletextuse /replace="" to annotate deletion, e.g. unsure 11..15 /replace=""
citation[number]
compare[accession-number.sequence-version]
db_xref&lt;database&gt;:&lt;identifier&gt;
experiment[CATEGORY:]text
genetext
gene_synonymtext
inference[CATEGORY:]TYPE[ (same species)][:EVIDENCE_BASIS]
locus_tagtext (single token)
maptext
notetext
old_locus_tagtext (single token)
replacetext
50) variation
Definition Feature Qualifiers Type Comment
a related strain contains stable mutations from the same gene (e.g., RFLPs, polymorphisms, etc.) which differ from the presented sequence at this location (and possibly others);variationalleletextused to describe alleles, RFLP's,and other naturally occurring mutations and polymorphisms; variability arising as a result of genetic manipulation (e.g. site directed mutagenesis) should be described with the misc_difference feature; use /replace="" to annotate deletion, e.g. variation 4..5 /replace=""
citation[number]
compare[accession-number.sequence-version]
db_xref&lt;database&gt;:&lt;identifier&gt;
experiment[CATEGORY:]text
frequencytext
genetext
gene_synonymtext
inference[CATEGORY:]TYPE[ (same species)][:EVIDENCE_BASIS]
locus_tagtext (single token)
maptext
notetext
old_locus_tagtext (single token)
phenotypetext
producttext
replaceboolean
standard_nametext

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Please download feature table standard file.