5Y83
Crystal structure of YidC from Thermotoga maritima
Summary for 5Y83
Entry DOI | 10.2210/pdb5y83/pdb |
Descriptor | Membrane protein insertase YidC (1 entity in total) |
Functional Keywords | yidc, alb3, oxa1, sec, transport protein |
Biological source | Thermotoga maritima (strain ATCC 43589 / MSB8 / DSM 3109 / JCM 10099) |
Total number of polymer chains | 1 |
Total formula weight | 52261.88 |
Authors | |
Primary citation | Xin, Y.,Zhao, Y.,Zheng, J.,Zhou, H.,Zhang, X.C.,Tian, C.,Huang, Y. Structure of YidC from Thermotoga maritima and its implications for YidC-mediated membrane protein insertion FASEB J., 32:2411-2421, 2018 Cited by PubMed Abstract: The evolutionarily conserved YidC/Oxa1/Alb3 family of proteins represents a unique membrane protein family that facilitates the insertion, folding, and assembly of a cohort of α-helical membrane proteins in all kingdoms of life, yet its underlying mechanisms remain elusive. We report the crystal structures of the full-length Thermotoga maritima YidC (TmYidC) and the TmYidC periplasmic domain (TmPD) at a resolution of 3.8 and 2.5 Å, respectively. The crystal structure of TmPD reveals a β-supersandwich fold but with apparently shortened β strands and different connectivity, as compared to the Escherichia coli YidC (EcYidC) periplasmic domain (EcPD). TmYidC in a detergent-solubilized state also adopts a monomeric form and its conserved core domain, which consists of 2 loosely associated α-helical bundles, assemble a fold similar to that of the other YidC homologues, yet distinct from that of the archaeal YidC-like DUF106 protein. Functional analysis using in vivo photo-crosslinking experiments demonstrates that Pf3 coat protein, a Sec-independent YidC substrate, exits to the lipid bilayer laterally via one of the 2 α-helical bundle interfaces: TM3-TM5. Engineered intramolecular disulfide bonds in TmYidC, in combination with complementation assays, suggest that significant rearrangement of the 2 α-helical bundles at the top of the hydrophilic groove is critical for TmYidC function. These experiments provide a more detailed mechanical insight into YidC-mediated membrane protein biogenesis.-Xin, Y., Zhao, Y., Zheng, J., Zhou, H., Zhang, X. C., Tian, C., Huang, Y. Structure of YidC from Thermotoga maritima and its implications for YidC-mediated membrane protein insertion. PubMed: 29295859DOI: 10.1096/fj.201700893RR PDB entries with the same primary citation |
Experimental method | X-RAY DIFFRACTION (3.842 Å) |
Structure validation
Download full validation report
