The transcription factor MML4_D12 regulates fiber development through interplay with the WD40-repeat protein WDR in cotton.

ABSTRACT: In planta, a vital regulatory complex, MYB-basic helix-loop-helix (bHLH)-WD40 (MBW), is involved in trichome development and synthesis of anthocyanin and proanthocyanin in Arabidopsis. Usually, WD40 proteins provide a scaffold for protein-protein interaction between MYB and bHLH proteins. Members of subgroup 9 of the R2R3 MYB transcription factors, which includes MYBMIXTA-Like (MML) genes important for plant cell differentiation, are unable to interact with bHLH. In this study, we report that a cotton (Gossypium hirsutum) seed trichome or lint fiber-related GhMML factor, GhMML4_D12, interacts with a diverged WD40 protein (GhWDR) in a process similar to but different from that of the MBW ternary complex involved in Arabidopsis trichome development. Amino acids 250-267 of GhMML4_D12 and the

SUBMITTER: Tian Y 

PROVIDER: S-EPMC7475258 | biostudies-literature | 2020 Jun

REPOSITORIES: biostudies-literature