Os02g0232100

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Annotated Information

HEI10 exerts its effects in the recombination process through modification of diverse meiotic components during rice meiosis.

Function

Human Enhancer of Invasion 10 (HEI10; also known asCCNB1IP1) was first isolated from humans and it was demonstrated that the molecule played a role in the mitotic cell cycle . HEI10 functions as an E3 Ubiquitin ligase to regulate cell migration and invasion . Further studies in mice revealed that mutation of HEI10 led to dramatic meiosis defects, indicating an important role of HEI10 during meiosis. It was shown in mice that mutation of HEI10 resulted in high prevalence of univalent chromosomes during metaphase I, which finally leads to a sterile phenotype. Furthermore, results obtained in experiments using a yeast two-hybrid system suggest a function for HEI10 as E3 SUMO ligase in addition to the ubiquitin ligase role reported in somatic cells.It is further known that HEI10 is required for meiotic CO formation. Consistent with this, it suggests that the role of HEI10 in rice might be the homolog of budding yeast Zip3 and C. elegans ZHP-3. Those genes may play both conserved and divergent roles in homologous recombination in their respective species. It suggests that also in rice HEI10 is essential for reciprocal recombination between homologous chromosomes.

Expression（Mutant VS Wild type）

Organization of the HEI10 gene and protein alignment (from reference ).

Meiosis in the hei10-1 mutant (from reference ).

Analysis of the distribution of HEI10 bright foci in WT meiocytes (from reference ).

Using sterile plants that segregated in F2 and F3 populations, the gene was mapped on the long arm of rice chromosome 2, which was further narrowed to a 100-kb region. All genes within this region were amplified and sequenced. A single nucleotide G to A substitution was found at position 140 of the first exon of the Os02g0232100 gene (Figure 2). This substitution introduced a new translation initiation site (ATG) in the 5’-UTR, which would theoretically express a totally different peptide. The hei10 mutant chromosomes behaved normally during leptotene and zygotene. Fully aligned chromosomes were detected during pachytene (Figure 3A). However, during diakinesis, the mutant cells showed a mixture of both univalent and bivalent chromosomes (Figure 3B). At metaphase I, the bivalents aligned well on the equatorial plate while some of the univalents were scattered in the nucleus (Figure 3C). In anaphase I, the bivalents separated normally but the scattered univalents segregated randomly. Besides those randomly distributed univalents, many univalents also aligned on the equatorial plate in metaphase I (Figure 3D) and underwent precocious separation of sister chromatids in anaphase I (Figure 3E), indicating a bipolar orientation of sister kinetochores. In telophase I and prophase II, an uneven number of chromosomes was observed in the two related cells. After the second division, tetrads with aberrant numbers of chromosomes were formed. In addition, multiple micronuclei were frequently observed (Figure 3F) . To accurately define the spatial and temporal distribution of HEI10 during meiosis in rice, dual immunolocalization experiments were performed using polyclonal antibodies against REC8 and HEI10 protein, raised in rabbit and mouse, respectively. To obtain the precise localization of HEI10 bright foci on the chromosome, observation of scattered chromosomes at late pachytene revealed that one, two or three, frequently two, prominent foci localized on each pair of homologs (Figure 4A). Additionally, when two or three foci occurred on the same chromosome, they tended to be spaced far apart. Immunostaining using antibodies against HEI10 and CENH3 also revealed that about 95.6% HEI10 foci located outside CENH3 position at late pachytene (Figure 4B). To further explore whether those HEI10 bright foci were randomly distributed along bivalents, we measured the interfocus distance among bright HEI10 focus on the shortest chromosome of the cell and estimated the existence of interference using the interference parameter n of the gamma model (Figure 4D). The result showed that HEI10 bright foci on a single chromosome displayed strong interference.

Evolution

HEI10 is the most likely ortholog of ZHP-3 and Zip3 in rice, although other proteins belonging to the Zip3 family cannot be excluded. In contrast to Zip3, both HEI10 and ZHP-3 exhibit a similar dynamic localization pattern, implying that the proteins may evolve new functions during meiotic recombination in multicellular organism. In C. elegans ZHP-3 was required for SC asymmetrical disassembly and normal bivalent structure . Such defects were not observed in rice, implying probable diversification of Zip3 homologs even among multicelluar organisms.

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Labs working on this gene

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References

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Structured Information

Gene Name	Os02g0232100
Description	Zinc finger, RING-type domain containing protein
Version	NM_001052906.1 GI:115445182 GeneID:4328810
Length	3452 bp
Definition	Oryza sativa Japonica Group Os02g0232100, complete gene.
Source	Oryza sativa Japonica Group ORGANISM Oryza sativa Japonica Group Eukaryota; Viridiplantae; Streptophyta; Embryophyta; Tracheophyta; Spermatophyta; Magnoliophyta; Liliopsida; Poales; Poaceae; BEP clade; Ehrhartoideae; Oryzeae; Oryza.
Chromosome	Chromosome 2
Location	Chromosome 2:7496475..7499926
Sequence Coding Region	7496552..7496823,7497026..7497189,7497285..7497540,7497756..7497786,7497862..7497907 ,7498216..7498288,7498408..7498477
Expression	GEO Profiles:Os02g0232100
Genome Context	<gbrowseImage1> name=NC_008395:7496475..7499926 source=RiceChromosome02 preset=GeneLocation </gbrowseImage1>
Gene Structure	<gbrowseImage2> name=NC_008395:7496475..7499926 source=RiceChromosome02 preset=GeneLocation </gbrowseImage2>
Coding Sequence	<cdnaseq>atgaagtgcaatgcttgctggcgggagttggaagggcaagctgtatcaacaacctgcggtcatcttttatgtacagaggatgctaagaaaatactgagcaatgatgctgcatgcccgatttgtgatcaagtgctttcaaaaagccatatgagacctgttgatacaaatccaaatgatgattggacaaatatgtcaatggctggagtttctccacagatacttatgaagagtgcatacagaagtgtcatgttttacattgggcaaaaggaactggagatgcagtacaagatgaacagaattgttggtcagtgtaggcaaaagtgtgaacttatgcaggcaaagttcactgagaagctggaagaagttcatactgcataccagaaaatggccaaaaaatgccagttgatggaacaagaggttgaaaacttgtcgagggataagcaagagctacaagaaaaatttgctgagaaatccaggcagaaaaggaagcttgatgagatgtatgatcagctgagaagcgagtatgagtcggcaaagcgttcagcaattcaacctgcgaacaactacttcccaagagcccagccagacctgttctcaggcgtgcccaacataatggatagcagcgaccctctgagacaaggattggctggtcttcctgaaactccagggcggagagatgagggatgggctccaccaccaaggcaacgtcggtccacctctggaccatttgagctgtctgcgggatctcctgctcacaatgcggcgcctccggttgatattaggcccagacagccagcacggcccgtattcggcactgccatgaataatacttctgcagctctgcgaaatatgataatctcgcctgtgaaacgtcctcagctttcccgaaaccgtccacatatgttcacgtaa</cdnaseq>
Protein Sequence	<aaseq>MKCNACWRELEGQAVSTTCGHLLCTEDAKKILSNDAACPICDQV LSKSHMRPVDTNPNDDWTNMSMAGVSPQILMKSAYRSVMFYIGQKELEMQYKMNRIVG QCRQKCELMQAKFTEKLEEVHTAYQKMAKKCQLMEQEVENLSRDKQELQEKFAEKSRQ KRKLDEMYDQLRSEYESAKRSAIQPANNYFPRAQPDLFSGVPNIMDSSDPLRQGLAGL PETPGRRDEGWAPPPRQRRSTSGPFELSAGSPAHNAAPPVDIRPRQPARPVFGTAMNN TSAALRNMIISPVKRPQLSRNRPHMFT</aaseq>
Gene Sequence	<dnaseqindica>3104..3375#2738..2901#2387..2642#2141..2171#2020..2065#1639..1711#1450..1519#gcaaagcaattttgccattctcccgtttcaaacccgcgctctctctctctctctctctctctccccctccctgccgctgctgccgccaccgccgcggcggcgccccgattcggtgatcccccgctcgcccatctccgccgtgacgtatcggcgacgcggagggagccccccaccccccacctccggatctagggtttcgaggcccaggtggcgttgcgctgcgcccccgctcctccgcctctcctccgccgccgagggttcgcgtgaggtaaccgacgcgcccccgtttggtaatcgcaccggcagatatcgtgggggttcgtttctccgtggcgtgttttggtgatggatccgatctaggtttgttttaggggctattttgacccaaatttcaggtgttttgcggagattgtagtgtttctacctagaaatactgcgattattggtgcgtttggagatgccactggctgtgaaatttcctgtgggaactcgtttccagttcgctggggatttatggaatggttacggttttgcaatattacgggttttgcgaactaaggcttcggtttggtcgctcatgggagcaatatttagtacgattgtcatcgccatttctgcaattccaccagcgattggttgctctgttcgtactcccaatagaaagcttgctccgctgctgatatttaaagtgcttcgttggtggatttcaactgcagatgttgggctctgaaggaaatggtgcaatttcttcgtgcatgatgctcgtatattgtgtctattatgtagtcctgcctgcttcggtggttctagatgctacagctttatctgccattctatttatgctgcattctatgttcagggcatgcgcaaaatattattgaaatgatcatttacttgaagataattggatttatttcattaattgctccgtaagccttgattcataggtagtattatgctttttttactactaagtctgtagaatcccatctctcctgcaatagctcataagaaagtgacatgttgtgcgatgcagaactggttctgaatgcatagtccttagtgcattttgagctaccctttgtcaggactgtagtctctgtaaatagtgggagaattcattggctaaaaagatgacaaaagctagctgcttatcagtattaagtgtcgcaccatttcttttatcatgcgagtagtgcaagtgcctgaagggttatcccatttagctattccaaatggcacatacgaaatatgattatttgttcatttgatccgtgatacttaggtagctatgatctgtctctgctcggtttgtttttctgttcagacatgcagaatacaactgctgtctgtattcagtttatatcttgcaactcataattctatgtttctacctgcaggtttctgcgtattaccagctctgtacttaatttactagtgagaagcaaaatgaagtgcaatgcttgctggcgggagttggaagggcaagctgtatcaacaacctgcggtcatcttttatgtatgcctgcaatcttccttactagttttgcttaaccagtttctcattgtaaactaacattgtctgctgctattgcagtatacataactgatccttgctgatgattatccgttgagcaggtacagaggatgctaagaaaatactgagcaatgatgctgcatgcccgatttgtgatcaagtgctttcaaaaaggtctgttgtttactcttgaagttgtattcattatctcatactacattttctcttctttcctgtaagctatttttgaatgtacatcatgatttgacaattagggatgccaaaagtacctcaaacgcatacatatttatcatctcgatggttattgccatgtcatttcatccgaatgggtgcttaacacatggagtttactttctagcatgctttgaagcttttatacttctttgatgtgttcgagtgaaaatggactccagtggtttactattttgagacagtctaaacattataattttttttctcagccatatgagacctgttgatacaaatccaaatgatgattggacaaatgtaagttcgcttacgattcattgtagataaaagcaatccttctttttctaacagccagtctgctcattggtacagatgtcaatggctggagtttctccacagatacgtatccttattattttctcattgtccgtaagattcttgtgctacttttgttgaaaatcatcactaactgctatatggaatctatggcgtagctagcctcttgtcctgttttattgtcatagtaatgcaaaaatctgaaagatcaaaattgtttatatgattattgtctaaggcttggtgactattcagattttccctaactatgatgctaatcagttatgaagagtgcatacagaagtgtcatgttttacattgggcaaaaggaactggagatgcagtacaagatgaacagaattgttggtcagtgtaggcaaaagtgtgaacttatgcaggcaaagttcactgagaagctggaagaagttcatactgcataccagaaaatggccaaaaaatgccagttgatggaacaagaggttgaaaacttgtcgagggataagcaagagctacaagaaaaatttgctgagaaatccaggtcagtatgtacagtacatttctagtttaattctcatatgaataaacctctgcttcatccaacttatatggagaattgactgctgtcatttccaggcagaaaaggaagcttgatgagatgtatgatcagctgagaagcgagtatgagtcggcaaagcgttcagcaattcaacctgcgaacaactacttcccaagagcccagccagacctgttctcaggcgtgcccaacataatggatagcagcgaccctctgagacaaggtaatttaacatgttatcattcagcttattagttctctcataccatataactcatcctttcctctgtgcacacccttttgttatgcttccaaccagaaaaactgttaactgtaatgcttggattgctagtagccactattaaatatataaaagttaaaatgcttttagccctccacaaaaacagcttattcactggctgcaggattggctggtcttcctgaaactccagggcggagagatgagggatgggctccaccaccaaggcaacgtcggtccacctctggaccatttgagctgtctgcgggatctcctgctcacaatgcggcgcctccggttgatattaggcccagacagccagcacggcccgtattcggcactgccatgaataatacttctgcagctctgcgaaatatgataatctcgcctgtgaaacgtcctcagctttcccgaaaccgtccacatatgttcacgtaatgtcctccttattgctcatgcatgtatttcacatctaaatgaagcagtttgggaatgaaaattgatgtccaacttgc</dnaseqindica>
External Link(s)	NCBI Gene:Os02g0232100, RefSeq:Os02g0232100