Os06g0701700
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Contents
Annotated Information
Function
The OsHKT2;1 transporter from rice, previously named OsHKT1, functions as a relatively Na+-selective transporter in heterologous expression systems. Compared with related OsHKT2;1 wild-type control plants, OsHKT2;1-null rice showed remarkably reduced growth, accompanied with a withering of the oldest leaf under low Na+ and K+ starvation conditions. Thus, rice OsHKT2;1 transporter can mediate large Na+ influx component into K+-starved roots, allowing improved growth of rice.
Expression
Rice OsHKT2;1 gene, which locates at the plasma membrane, is mainly expressed in cortex cells in roots and in vascular bundle regions in leaves. In addition, the OsHKT2;1 gene expression in intact roots is controlled by external K+ and Na+ concentrations at the transcriptional and posttranslational levels. Both transcriptional and posttranslational mechanisms monitor and down-regulate the amount of Na+ influx via OsHKT2;1 to prevent Na+ over-accumulation and thus Na+ toxicity.
Evolution
In rice, there are eight HKT-like genes. OsHKT2;1 is the first gene to be discovered and shares 93% identity at the nucleotide level with OsHKT2;2. Moreover, OsHKT2;1 has 73-76% identity at the positions 669-855,1016-1170 and 1366-1502 with OsHKT2;3/4 in rice.
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Labs working on this gene
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References
[1] T Horie, A Costa1, TH Kim, MJ Han, R Horie, HY Leung, A Miyao, H Hirochika, G An and JI Schroeder. Rice OsHKT2;1 transporter mediates large Na+ influx component into K+-starved roots for growth. The EMBO Journal .2007, 26: 3003–3014. [2] SB Huang, W Spielmeyer, ES Lagudah and R Munns. Comparative mapping of HKT genes in wheat, barley, and rice, key determinants of Na+ transport and salt tolerance. Journal of Experimental Botany. 2008, 59(4): 927-937. [3] X Yao, T Horie, S Xue, HY Leung, M Katsuhara, DE Brodsky,Y Wu and JI Schroeder. Differential Sodium and Potassium Transport Selectivities of the Rice OsHKT2;1 and OsHKT2;2 Transporters in Plant Cells. Plant Physiology. 2010, 152: 341–355.
Structured Information
| Gene Name |
Os06g0701700 |
|---|---|
| Description |
HKT-type transporter (Sodium ion transporter) |
| Version |
NM_001065021.1 GI:115469773 GeneID:4341971 |
| Length |
2264 bp |
| Definition |
Oryza sativa Japonica Group Os06g0701700, 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 | |
| Location |
Chromosome 6:30415942..30418205 |
| Sequence Coding Region |
30416168..30416372,30416665..30416886,30417000..30418165 |
| Expression | |
| Genome Context |
<gbrowseImage1> name=NC_008399:30415942..30418205 source=RiceChromosome06 preset=GeneLocation </gbrowseImage1> |
| Gene Structure |
<gbrowseImage2> name=NC_008399:30415942..30418205 source=RiceChromosome06 preset=GeneLocation </gbrowseImage2> |
| Coding Sequence |
<cdnaseq>atgacgagcatttaccatgatttcattcataacaagctgcagagcttcggaaggatcggtagatattttgttaattttgttgttctagcccatagattcattgccttgcatattcacccattctggattcagttgtcctacttccttctcattagcatcctaggttcagttctattgatgttcctgaagccaagcaacccagaattcagaccaggttacattgacatgctgttcttgtcaacctctgctctgacactttccagcctcatcaccatcgaaatggaggttctctcaagctcacaaattgtggttattacactgctgatgcttctcgggggtgaagtctttgtttctttcctaggcctcatgcttagactgaaccataagcacaacccagagttttcaggggacaaggtcagttcagttcctatcgagcttgatacaatcaactcggcaagcactgtgataagttgtgaagagctgcagctggaagcagcaattcctgaagttccatcttccaccattaaggatttgaagaggagcaagcgcctgaggtggttcttaggatttgtagtcttcagctattttgttgtgatccatgtcgctggctttctgctggttctctggtacataagtcgtgtctcatctgcaaaagctccactgaagaagaaagggatcaacattgcactcttctcattctcggtcacagtctcctcgtttgcgaatgtggggctcgtgccgacgaatgagaacatggcaatcttctccaagaacccgggcctcctcctcctgttcatcggccagattcttgcaggcaatacactttaccctctcttcctaaggctattgatatggttcctggggaaggtgaccaagttgagagaactgaagctcatgatcaagaaccctgaggagctacagtatgattatttgcttcctaagttgccaacggcgtttctggcatcaactgtcattggccttatggcttccttggtcacattgttcggtgctgtcgactggaattcttcagtctttgatggactcagctcttaccagaagattatcaatgcattgttcatggcagtgaacgcaaggcactcgggggagaactccatcgactgctcactcatcgcccctgctgttctagtactgttcatcatcttaatgtacttaccaccatcgacaacatttgcactgtccaatggagatgaaaaaactgcaaataagaaagcgaaaagaaaattaggtttagtggtgcagaacttggcattttcacagcttgcctgcatctcagtctttgtgatagttgcattcatcactgagaggagtcgtctcagaaatgatccactcaacttctctgctctgaacatgatatttgaaatcatcagtgcatatgggaatgtagggctatccactggttacagctgttcgaggttgcagaaactgcacccggggagcatctgccaggacaagccgtacagcttgtccggatggtggagtgatgaaggaaagttgctgctagtctttgtgatgctctatggaaggctcaaggccttcacaaaaggtacaggtgaatattggaggctatggtaa</cdnaseq> |
| Protein Sequence |
<aaseq>MTSIYHDFIHNKLQSFGRIGRYFVNFVVLAHRFIALHIHPFWIQ LSYFLLISILGSVLLMFLKPSNPEFRPGYIDMLFLSTSALTLSSLITIEMEVLSSSQI VVITLLMLLGGEVFVSFLGLMLRLNHKHNPEFSGDKVSSVPIELDTINSASTVISCEE LQLEAAIPEVPSSTIKDLKRSKRLRWFLGFVVFSYFVVIHVAGFLLVLWYISRVSSAK APLKKKGINIALFSFSVTVSSFANVGLVPTNENMAIFSKNPGLLLLFIGQILAGNTLY PLFLRLLIWFLGKVTKLRELKLMIKNPEELQYDYLLPKLPTAFLASTVIGLMASLVTL FGAVDWNSSVFDGLSSYQKIINALFMAVNARHSGENSIDCSLIAPAVLVLFIILMYLP PSTTFALSNGDEKTANKKAKRKLGLVVQNLAFSQLACISVFVIVAFITERSRLRNDPL NFSALNMIFEIISAYGNVGLSTGYSCSRLQKLHPGSICQDKPYSLSGWWSDEGKLLLV FVMLYGRLKAFTKGTGEYWRLW</aaseq> |
| Gene Sequence |
<dnaseqindica>1834..2038#1320..1541#41..1206#gctttctcatactcgttggctcgttgctcctttgcatcaaatgacgagcatttaccatgatttcattcataacaagctgcagagcttcggaaggatcggtagatattttgttaattttgttgttctagcccatagattcattgccttgcatattcacccattctggattcagttgtcctacttccttctcattagcatcctaggttcagttctattgatgttcctgaagccaagcaacccagaattcagaccaggttacattgacatgctgttcttgtcaacctctgctctgacactttccagcctcatcaccatcgaaatggaggttctctcaagctcacaaattgtggttattacactgctgatgcttctcgggggtgaagtctttgtttctttcctaggcctcatgcttagactgaaccataagcacaacccagagttttcaggggacaaggtcagttcagttcctatcgagcttgatacaatcaactcggcaagcactgtgataagttgtgaagagctgcagctggaagcagcaattcctgaagttccatcttccaccattaaggatttgaagaggagcaagcgcctgaggtggttcttaggatttgtagtcttcagctattttgttgtgatccatgtcgctggctttctgctggttctctggtacataagtcgtgtctcatctgcaaaagctccactgaagaagaaagggatcaacattgcactcttctcattctcggtcacagtctcctcgtttgcgaatgtggggctcgtgccgacgaatgagaacatggcaatcttctccaagaacccgggcctcctcctcctgttcatcggccagattcttgcaggcaatacactttaccctctcttcctaaggctattgatatggttcctggggaaggtgaccaagttgagagaactgaagctcatgatcaagaaccctgaggagctacagtatgattatttgcttcctaagttgccaacggcgtttctggcatcaactgtcattggccttatggcttccttggtcacattgttcggtgctgtcgactggaattcttcagtctttgatggactcagctcttaccagaagattatcaatgcattgttcatggcagtgaacgcaaggcactcgggggagaactccatcgactgctcactcatcgcccctgctgttctagtactgttcatcatcttaatgttagttcatgacacctcatctatttatgtttcatgtcatccaactaatactgttagcttcagccttcaggtgatgacatatttgtctgaaactttactttcttggttttcaggtacttaccaccatcgacaacatttgcactgtccaatggagatgaaaaaactgcaaataagaaagcgaaaagaaaattaggtttagtggtgcagaacttggcattttcacagcttgcctgcatctcagtctttgtgatagttgcattcatcactgagaggagtcgtctcagaaatgatccactcaacttctctgctctgaacatgatatttgaaatcatcaggtgtgttcctctctcttgattatgcaatcaaaattctcgtatcaatctgctaagttacactgggcatcaagccaatgatattgtaggcaaaataaaaacaacgaaacacgataaaataataaacttcattagcaaagcaagccaagtagtaagatccacatctgacacctcagaatctttcagaagacaagaaaactaacccaaacatagattgttctcaacaagataactattttgtactattctgtctttctaaaagagtatgcctgttctttcttttttttttttgcagtgcatatgggaatgtagggctatccactggttacagctgttcgaggttgcagaaactgcacccggggagcatctgccaggacaagccgtacagcttgtccggatggtggagtgatgaaggaaagttgctgctagtctttgtgatgctctatggaaggctcaaggccttcacaaaaggtacaggtgaatattggaggctatggtaaaagctgaagcctgaacaaaagcacttgcaaaggcaagtgcatcaagtgcagtatatgtaactatttagagttctgcctgaaagttcaggtttctaattgggccatagtgtataaaaatacacccaatattattcctcttaatacagtggtgcgcaatcctttagcgtattcccgaaaaaaagaacacccaatatgttgcaattgcaatatagaactgttgttctcc</dnaseqindica> |
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