7q37

Crystal structure of proton pump MAR rhodopsin pressurized with krypton

spinqualitylabelsall models 7q37, resolution 2.25Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 7q37 is a 1 chain structure with sequence from Candidatus Actinomarina minuta. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 2.25Å Ligands: FME, HEX, KR, LFA, RET Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function S5DM51_9ACTN Publication Abstract from PubMed In this work we examine how small hydrophobic molecules such as inert gases interact with membrane proteins (MPs) at a molecular level. High pressure atmospheres of argon and krypton were used to produce noble gas derivatives of crystals of three well studied MPs (two different proton pumps and a sodium light-driven ion pump). The structures obtained using X-ray crystallography showed that the vast majority of argon and krypton binding sites were located on the outer hydrophobic surface of the MPs - a surface usually accommodating hydrophobic chains of annular lipids (which are known structural and functional determinants for MPs). In conformity with these results, supplementary in silico molecular dynamics (MD) analysis predicted even greater numbers of argon and krypton binding positions on MP surface within the bilayer. These results indicate a potential importance of such interactions, particularly as related to the phenomenon of noble gas-induced anaesthesia. High-pressure crystallography shows noble gas intervention into protein-lipid interaction and suggests a model for anaesthetic action.,Melnikov I, Orekhov P, Rulev M, Kovalev K, Astashkin R, Bratanov D, Ryzhykau Y, Balandin T, Bukhdruker S, Okhrimenko I, Borshchevskiy V, Bourenkov G, Mueller-Dieckmann C, van der Linden P, Carpentier P, Leonard G, Gordeliy V, Popov A Commun Biol. 2022 Apr 14;5(1):360. doi: 10.1038/s42003-022-03233-y. PMID:35422073 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Bacteriorhodopsin 3D structures

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