151
views
0
recommends
+1 Recommend
0 collections
    0
    shares
      • Record: found
      • Abstract: found
      • Article: not found

      Genome-wide analysis of basic/helix-loop-helix transcription factor family in rice and Arabidopsis.

      Read this article at

      ScienceOpenPublisherPMC
      Bookmark
          There is no author summary for this article yet. Authors can add summaries to their articles on ScienceOpen to make them more accessible to a non-specialist audience.

          Abstract

          The basic/helix-loop-helix (bHLH) transcription factors and their homologs form a large family in plant and animal genomes. They are known to play important roles in the specification of tissue types in animals. On the other hand, few plant bHLH proteins have been studied functionally. Recent completion of whole genome sequences of model plants Arabidopsis (Arabidopsis thaliana) and rice (Oryza sativa) allows genome-wide analysis and comparison of the bHLH family in flowering plants. We have identified 167 bHLH genes in the rice genome, and their phylogenetic analysis indicates that they form well-supported clades, which are defined as subfamilies. In addition, sequence analysis of potential DNA-binding activity, the sequence motifs outside the bHLH domain, and the conservation of intron/exon structural patterns further support the evolutionary relationships among these proteins. The genome distribution of rice bHLH genes strongly supports the hypothesis that genome-wide and tandem duplication contributed to the expansion of the bHLH gene family, consistent with the birth-and-death theory of gene family evolution. Bioinformatics analysis suggests that rice bHLH proteins can potentially participate in a variety of combinatorial interactions, endowing them with the capacity to regulate a multitude of transcriptional programs. In addition, similar expression patterns suggest functional conservation between some rice bHLH genes and their close Arabidopsis homologs.

          Related collections

          Author and article information

          Journal
          Plant Physiol
          Plant physiology
          American Society of Plant Biologists (ASPB)
          0032-0889
          0032-0889
          Aug 2006
          : 141
          : 4
          Affiliations
          [1 ] Shanghai Jiao Tong University-Shanghai Institutes for Biological Sciences-Pennsylvania State University Joint Center for Life Sciences, Shanghai Jiao Tong University, Shanghai, People's Republic of China, 200240.
          Article
          141/4/1167
          10.1104/pp.106.080580
          1533929
          16896230
          4dd2336e-d9f7-4152-bc47-9db05acadc6f

          Comments

          Comment on this article