National Institutes of Health/National Institute of Environmental Health Sciences (NIH/NIEHS)
米国
引用
ジャーナル: Nat Commun / 年: 2025 タイトル: A higher order PUF complex is central to regulation of C. elegans germline stem cells. 著者: Chen Qiu / Sarah L Crittenden / Brian H Carrick / Lucas B Dillard / Stephany J Costa Dos Santos / Venkata P Dandey / Robert C Dutcher / Elizabeth G Viverette / Robert N Wine / Jennifer ...著者: Chen Qiu / Sarah L Crittenden / Brian H Carrick / Lucas B Dillard / Stephany J Costa Dos Santos / Venkata P Dandey / Robert C Dutcher / Elizabeth G Viverette / Robert N Wine / Jennifer Woodworth / Zachary T Campbell / Marvin Wickens / Mario J Borgnia / Judith Kimble / Traci M Tanaka Hall / 要旨: PUF RNA-binding proteins are broadly conserved stem cell regulators. Nematode PUF proteins maintain germline stem cells (GSCs) and, with key partner proteins, repress differentiation mRNAs, including ...PUF RNA-binding proteins are broadly conserved stem cell regulators. Nematode PUF proteins maintain germline stem cells (GSCs) and, with key partner proteins, repress differentiation mRNAs, including gld-1. Here we report that PUF protein FBF-2 and its partner LST-1 form a ternary complex that represses gld-1 via a pair of adjacent FBF binding elements (FBEs) in its 3'UTR. One LST-1 molecule links two FBF-2 molecules via motifs in the LST-1 intrinsically-disordered region; the gld-1 FBE pair includes a well-established 'canonical' FBE and a newly-identified noncanonical FBE. Remarkably, this FBE pair drives both full RNA repression in GSCs and full RNA activation upon differentiation. Discoveries of the LST-1-FBF-2 ternary complex, the gld-1 adjacent FBEs, and their in vivo significance predict an expanded regulatory repertoire of different assemblies of PUF-partner-RNA higher order complexes in nematode GSCs. This also suggests analogous PUF controls may await discovery in other biological contexts and organisms.