Abstract
We have analyzed transcription factor genes in organisms (A.thaliana (2465), O.sativa(2326),N.crassa(445),H.sapiens(2699), C.elegans(998), D.melanogaster(1395), S.cerevisiae(322) and E.coli(271) )to detect the specificities of transcription regulation in organism. To better describe and understand the differences we have focused on features of their DNA-binding structures. Among these organisms, the zinc-coordinating factor genes are especially divergent in animals. In contrast, plants are more divergent in genes containing the other DNA-binding domains (the basic domain with bZIP and HLH; HTH with HD, Myb and NAC; the beta-scaffold factor with MADS and CCAAT factors; and plant-specific domains including AP2/EREBP and B3). Analyses of alternative splicing events and gene duplication by chromosomal mapping indicated different tactics of the increase of the protein species in plants (C2H2, WRKY, bHLH, MYB, NAC, B3 =segmental duplication; MADS, homeodomain=tandem duplication; Ring finger, AP2/EREBP=Alternative splicing).
