Cwc23, an essential J-protein critical for pre-mRNA splicing with a dispensable J-domain

ABSTRACT: J-proteins are structurally diverse, obligatory co-chaperones of Hsp70s, each with a highly conserved J-domain that plays a critical role in stimulation of Hsp70’s ATPase activity. The essential protein, Cwc23, is one of 13 J-proteins found in the cytosol and/or nucleus of Saccharomyces cerevisiae. We report that a partial loss-of-function CWC23 mutant has severe, global defects in pre-mRNA splicing. This mutation leads to accumulation of the excised, lariat form of the intron, as well as unspliced pre-mRNA, suggesting a role for Cwc23 in spliceosome disassembly. Such a role is further supported by the observation that this mutation results in reduced interaction between Cwc23 and Ntr1 (SPP382), a known component of the disassembly pathway. However, Cwc23 is a very atypical J-protein. It

ORGANISM(S): Saccharomyces cerevisiae

SUBMITTER: Maki Inada 

PROVIDER: E-GEOD-18485 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress