Phylogenetic relationships and evolution of the KNOTTED class of plant homeodomain proteins

被引:60
作者
Bharathan, G
Janssen, BJ
Kellogg, EA
Sinha, N
机构
[1] Univ Calif Davis, Plant Biol Sect, Davis, CA 95616 USA
[2] SUNY Stony Brook, Dept Ecol & Evolut, Stony Brook, NY 11794 USA
[3] Univ Missouri, Dept Biol, St Louis, MO 63121 USA
关键词
homeobox; phylogeny; evolution; development; plants;
D O I
10.1093/oxfordjournals.molbev.a026136
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
Knotted-like (KNOX) proteins constitute a group of homeodomain proteins involved in pattern formation in developing tissues of angiosperms and other green plants, We conducted phylogenetic analyses of nucleotide and amino acid sequences of all known KNOX proteins in order to examine their evolution. Our analyses reveal two groups of KNOX proteins, classes I and II. Dicot and monocot sequences occur in both classes, indicating that the protein classes arose prior to the origin of the monocots. A conifer (Picea) sequence is nested within class I, suggesting that there are likely to be other copies of KNOX genes in this and other conifers. The orthology of several grass genes (including Zen Kn1, ZMKN1) is strongly supported by phylogenetic and synteny analyses. However, no compelling evidence supports the hypothesis of orthology previously proposed for several dicot genes and ZMKN1. Analysis of expression patterns suggests that the ancestral KNOX gene was expressed in all plant parts and that the propensity to be downregulated in roots and leaves evolved in the class I genes.
引用
收藏
页码:553 / 563
页数:11
相关论文
共 42 条
  • [41] TEMPLETON AR, 1983, EVOLUTION, V37, P221, DOI 10.1111/j.1558-5646.1983.tb05533.x
  • [42] THE DEVELOPMENTAL GENE KNOTTED-1 IS A MEMBER OF A MAIZE HOMEOBOX GENE FAMILY
    VOLLBRECHT, E
    VEIT, B
    SINHA, N
    HAKE, S
    [J]. NATURE, 1991, 350 (6315) : 241 - 243