Plant Transcription factor database - Universität Potsdam
version: 3.0

Sorghum bicolor RWP-RK Family


Schauser et al. 2005: Genetic studies in Lotus japonicus and pea have identified Nin as a core symbiotic gene required for establishing symbiosis between legumes and nitrogen fixing bacteria collectively called Rhizobium. Sequencing of additional Lotus cDNAs combined with analysis of genome sequences from Arabidopsis and rice reveals that Nin homologues in all three species constitute small gene families. In total, the Arabidopsis and rice genomes encode nine and three NIN-like proteins (NLPs), respectively. We present here a bioinformatics analysis and prediction of NLP evolution. On a genome scale we show that in Arabidopsis, this family has evolved through segmental duplication rather than through tandem amplification. Alignment of all predicted NLP protein sequences shows a composition with six conserved modules. In addition, Lotus and pea NLPs contain segments that might characterize NIN proteins of legumes and be of importance for their function in symbiosis. The most conserved region in NLPs, the RWP-RK domain, has secondary structure predictions consistent with DNA binding properties. This motif is shared by several other small proteins in both Arabidopsis and rice. In rice, the RWP-RK domain sequences have diversified significantly more than in Arabidopsis. Database searches reveal that, apart from its presence in Arabidopsis and rice, the motif is also found in the algae Chlamydomonas and in the slime mold Dictyostelium discoideum. Thus, the origin of this putative DNA binding region seems to predate the fungus-plant divide.

Members of this family
  SHOULD possess RWP-RK domain

Domain alignments

This family is also present in:


There are 14 gene models in this family

Gene modelDescriptionDomains
4792637 e_gw1.2.17451.1 PB1 RWP-RK
4828749 e_gw1.6.14113.1 PB1 RWP-RK
4974735 fgenesh1_pg.C_chr_3001850 RWP-RK
4977492 fgenesh1_pg.C_chr_4000325 PB1 RWP-RK
4979527 fgenesh1_pg.C_chr_4002360 RWP-RK
4984990 fgenesh1_pg.C_chr_6001877 RWP-RK
4985853 fgenesh1_pg.C_chr_6002740 RWP-RK
4987232 fgenesh1_pg.C_chr_7001322 RWP-RK
4991370 fgenesh1_pg.C_chr_9001098 RWP-RK
4993711 fgenesh1_pg.C_chr_10000888 RWP-RK
5001119 estExt_fgenesh1_pg.C_chr_30007 RWP-RK
5044857 Sb08g007760 RWP-RK
5050275 Sb01g048290 PB1 RWP-RK
5052341 Sb03g000490 PB1 RWP-RK

General references

Schauser, L; Roussis, A; Stiller, J; Stougaard, J. 1999. A plant regulator controlling development of symbiotic root nodules. Nature 402(6758):191-5 PUBMEDID:10647012