Interactome analysis of the six cotton 14-3-3s that are preferentially expressed in fibres and involved in cell elongation.
Proteins of the 14-3-3 family regulate a divergent set of signalling pathways in all eukaryotic organisms. In this study, several cDNAs encoding 14-3-3 proteins were isolated from a cotton fibre cDNA library. The Gh14-3-3 genes share high sequence homology at the nucleotide level in the coding region and at the amino acid level. Real-time quantitative RT-PCR analysis indicated that the expression of these Gh14-3-3 genes is developmentally regulated in fibres, and reached their peak at the stage of rapid cell elongation of fibre development. Furthermore, overexpression of Gh14-3-3a, Gh14-3-3e, and Gh14-3-3L in fission yeast promoted atypical longitudinal growth of the host cells. Yeast two-hybrid analysis revealed that the interaction between cotton 14-3-3 proteins is isoform selective. Through yeast two-hybrid screening, 38 novel interaction partners of the six 14-3-3 proteins (Gh14-3-3a, Gh14-3-3e, Gh14-3-3f, Gh14-3-3g, Gh14-3-3h, and Gh14-3-3L), which are involved in plant development, metabolism, signalling transduction, and other cellular processes, were identified in cotton fibres. Taking these data together, it is proposed that the Gh14-3-3 proteins may participate in regulation of fibre cell elongation. Thus, the results of this study provide novel insights into the 14-3-3 signalling related to fibre development of cotton.
Hubei Key Laboratory of Genetic Regulation and Integrative Biology, College of Life Sciences, HuaZhong Normal University, Wuhan 430079, China.
Ze-Ting
ZT
Zhang
Ying
Y
Zhou
Yang
Y
Li
Su-Qiang
SQ
Shao
Bing-Ying
BY
Li
Hai-Yan
HY
Shi
Xue-Bao
XB
Li
D048948:14-3-3 Proteins / Q000235:genetics / Q000378:metabolism*; D000595:Amino Acid Sequence; D049108:Cell Enlargement; D032561:Cotton Fiber; D018076:DNA, Complementary / Q000235:genetics; D020869:Gene Expression Profiling; D018507:Gene Expression Regulation, Developmental; D018506:Gene Expression Regulation, Plant; D015723:Gene Library; D003368:Gossypium / Q000166:cytology / Q000235:genetics* / Q000378:metabolism; D008969:Molecular Sequence Data; D010802:Phylogeny; D010940:Plant Proteins / Q000235:genetics / Q000378:metabolism*; D018749:RNA, Plant / Q000235:genetics; D016415:Sequence Alignment; D017422:Sequence Analysis, DNA; D020798:Two-Hybrid System Techniques
D048948:14-3-3 Proteins; D018076:DNA, Complementary; D010940:Plant Proteins; D018749:RNA, Plant