4asv | pdb_00004asv

Solution structure of the N-terminal dimerisation domain of Sgt2

spinqualitylabelsall models 4asv, 20 NMR models Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 4asv is a 2 chain structure with sequence from Atcc 18824. Full experimental information is available from OCA. For a guided tour on the structure components use FirstGlance. Related: 4asw, 4as0 Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function [SGT2_YEAST] Co-chaperone that binds to the molecular chaperone Hsp70 (SSA1 and SSA2). Regulates Hsp70 ATPase activity (By similarity). Required for recovery from heat shock. Publication Abstract from PubMed Small, glutamine-rich, tetratricopeptide repeat protein 2 (Sgt2) is the first known port of call for many newly synthesized tail-anchored (TA) proteins released from the ribosome and destined for the GET (Guided Entry of TA proteins) pathway. This leads them to the residential membrane of the endoplasmic reticulum via an alternative to the cotranslational, signal recognition particle-dependent mechanism that their topology denies them. In yeast, the first stage of the GET pathway involves Sgt2 passing TA proteins on to the Get4/Get5 complex through a direct interaction between the N-terminal (NT) domain of Sgt2 and the ubiquitin-like (UBL) domain of Get5. Here we characterize this interaction at a molecular level by solving both a solution structure of Sgt2_NT, which adopts a unique helical fold, and a crystal structure of the Get5_UBL. Furthermore, using reciprocal chemical shift perturbation data and experimental restraints, we solve a structure of the Sgt2_NT/Get5_UBL complex, validate it via site-directed mutagenesis, and empirically determine its stoichiometry using relaxation experiments and isothermal titration calorimetry. Taken together, these data provide detailed structural information about the interaction between two key players in the coordinated delivery of TA protein substrates into the GET pathway. Structure of the Sgt2/Get5 complex provides insights into GET-mediated targeting of tail-anchored membrane proteins.,Simon AC, Simpson PJ, Goldstone RM, Krysztofinska EM, Murray JW, High S, Isaacson RL Proc Natl Acad Sci U S A. 2013 Jan 22;110(4):1327-32. doi:, 10.1073/pnas.1207518110. Epub 2013 Jan 7. PMID:23297211 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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