张立全 张浩林 李丛丛 魏建华 张杰伟



摘要:【目的】生长调节因子互作因子( GRF-interacting factor,GIF)是植物体内一类转录共激活因子,在植物生长发育和逆境胁迫中起重要作用。通过系统分析谷子GIF基因家族的组成、各成员的结构以及进化关系,为GIF基因调节机制研究提供参考。【方法】利用谷子基因组数据库,采用生物信息学的方法,鉴定谷子GIF基因家族的基因结构、染色体定位,编码蛋白相似性、二级结构、跨膜区和磷酸化位点预测,通过序列比对进行进化和分类分析。【结果】谷子含有3个GIF基因,均含有4个外显子,分布于第3、8和9號染色体上。编码SiGIF1蛋白和SiGIF2蛋白相似性最高,为72.04%,SiGIF1蛋白和SiGIF3蛋白相似性最低,为37.08%。二级结构分析显示,谷子GIF蛋白无规则卷曲占比最高( 41.56%-56.60%),其次为a-螺旋(34.43%-35.50%),再次为D-转角(5 19%~11.69%),p-折叠最低(3.23%- 11.26%)。TMHMM跨膜区进行分析显示,谷子GIF蛋白均不含有跨膜区。MEME保守基序分析显示,谷子GIF蛋白均含有保守的SSXT( PF05030)结构域。磷酸化位点预测分析表明谷子GIF蛋白均含有潜在磷酸化位点。【结论】谷子GIF基因家族的基因结构、磷酸化位点预测等生物信息学分析结果将为揭示谷子GIF基因家族在谷子生长发育过程中的功能提供重要的线索。
关键词:谷子;生长调节因子互作因子;基因家族;进化分析
中图分类号:S 515
文献标志码:A
文章编号:1008-03 84( 2021) 08-0878-06
Bioinformatics of Growth-interacting Factor Genes in Foxtail Millet
ZHANG Liquan 1, ZHANG Haolin 1.2. LI Congcong 1, WEI Jianhua 1*. ZHANG Jiewei 1*
(1. Agro-Biotechnology Research Institute, Beijing Acndemy ofAgriculture and Forestry ScienceslBeijing Key Laboratory of
Agricultural Genetic Resources and Biotechnology. Beijing 100097. China; 2. College ofLife Science.
Shanghai Normal University, Shanghai 200234, China )
Abstract: 【 Objective】 The composition, structure. and evolution of each member of the growth-interacting factors (GIF) ofthe growth-regulating factors (GRF) and the transcription cofactors that closely associate with the growth. development, andstress response of plants in Setaria italica were analyzed. 【Method】 Based on the S. italica genome database andbioinformatics. the structure. characteristics, position on the chromosome. proteins similarity, secondary structure,transmembrane domain, and phosphorylation sites of the GIF genes were obtained.【Result】The 3 SiGIFs in S. italicagenome contained 4 exons locating on the 3, 8. and 9 chromosomes. The greatest similarity between SiGIFl and SlGIF2 was72.04%. while the lowest was 37.08% between SiGIFl and SiGIF3. The secondary structure consisted of 41.56%- 56.60%random coils. 34.43 % -35.50% alpha helix, 5.l9% _ 11.69% beta turns and 3 .23 % - 11.26% extended strands. The TMHMMtransmembrane domain analysis showed no transmembrane domain in SiGIFs. MEME indicated that all SiGIFs containedconserved SSXT (PF05030) domain. And potential phosphorylation sites in the GIFs were predicted by analysis.【Conclusion】The bioinformatics revealed information on the structure, phosphorylation sites of SiGIF gene familyprovided crucial insights for the studies on the growth and development of plants.
Key words: Setaria italica; GIF; gene family; phylogeny analysis
0 引言
【研究意义】生长调节因子互作因子( GRF-interacting factor,GIF)是植物体内一类转录共激活因子,属于SSXT超家族基因,与人类SYT转录共激活因子同源,在植物生长发育和逆境胁迫中起重要作用。GIF与植物生长调节因子(Growth regulatingfactor,GRF)共同形成功能复合体,在植物侧生器官的细胞增殖等过程中发挥重要作用[1-2]。……