Formation of the VHL-elongin BC tumor suppressor complex is mediated by the chaperonin TRiC.
von Hippel-Lindau (VHL) disease is caused by loss of function of the VHL tumor suppressor protein. Here, we demonstrate that the folding and assembly of VHL into a complex with its partner proteins, elongin B and elongin C (herein, elongin BC), is directly mediated by the chaperonin TRiC/CCT. Association of VHL with TRiC is required for formation of the VHL-elongin BC complex. A 55-amino acid domain of VHL is both necessary and sufficient for binding to TRiC. Importantly, mutation or deletion of this domain is associated with VHL disease. We identified two mutations that disrupt the normal interaction with TRiC and impair VHL folding. Our results define a novel role for TRiC in mediating oligomerization and suggest that inactivating mutations can impair polypeptide function by interfering with chaperone-mediated folding.
Feldman
D E
DE
Department of Biological Sciences, Stanford University, California 94305, USA.
Thulasiraman
V
V
Ferreyra
R G
RG
Frydman
J
J
D018833:Chaperonins / Q000235:genetics; D000075065:Elongin; D015972:Gene Expression Regulation, Neoplastic; D016147:Genes, Tumor Suppressor; D006801:Humans; D047908:Intracellular Signaling Peptides and Proteins; D008025:Ligases; D008869:Microtubule-Associated Proteins; D009154:Mutation; D009687:Nuclear Proteins / Q000235:genetics* / Q000378:metabolism; D017510:Protein Folding; D011506:Proteins / Q000737:chemistry / Q000235:genetics* / Q000378:metabolism; D014157:Transcription Factors / Q000235:genetics* / Q000378:metabolism; D025521:Tumor Suppressor Proteins; D044767:Ubiquitin-Protein Ligases; D051794:Von Hippel-Lindau Tumor Suppressor Protein; D056427:t-Complex Genome Region; D006623:von Hippel-Lindau Disease / Q000235:genetics*
C000616396:ELOB protein, human; C000616395:ELOC protein, human; D000075065:Elongin; D047908:Intracellular Signaling Peptides and Proteins; D008869:Microtubule-Associated Proteins; D009687:Nuclear Proteins; D011506:Proteins; D014157:Transcription Factors; D025521:Tumor Suppressor Proteins; C116196:PPP1R11 protein, human; D044767:Ubiquitin-Protein Ligases; D051794:Von Hippel-Lindau Tumor Suppressor Protein; D018833:Chaperonins; D008025:Ligases; C497446:VHL protein, human