Structure of outer membrane protein G in lipid bilayers.
Structure of outer membrane protein G in lipid bilayers.
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DOI:
10.1038/s41467-017-02228-2
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发表时间:
2017-12-12
影响因子:
16.6
通讯作者:
Oschkinat H
中科院分区:
文献类型:
--
作者:
Retel JS;Nieuwkoop AJ;Hiller M;Higman VA;Barbet-Massin E;Stanek J;Andreas LB;Franks WT;van Rossum BJ;Vinothkumar KR;Handel L;de Palma GG;Bardiaux B;Pintacuda G;Emsley L;Kühlbrandt W;Oschkinat H
β-barrel proteins mediate nutrient uptake in bacteria and serve vital functions in cell signaling and adhesion. For the 14-strand outer membrane protein G of Escherichia coli, opening and closing is pH-dependent. Different roles of the extracellular loops in this process were proposed, and X-ray and solution NMR studies were divergent. Here, we report the structure of outer membrane protein G investigated in bilayers of E. coli lipid extracts by magic-angle-spinning NMR. In total, 1847 inter-residue 1H–1H and 13C–13C distance restraints, 256 torsion angles, but no hydrogen bond restraints are used to calculate the structure. The length of β-strands is found to vary beyond the membrane boundary, with strands 6–8 being the longest and the extracellular loops 3 and 4 well ordered. The site of barrel closure at strands 1 and 14 is more disordered than most remaining strands, with the flexibility decreasing toward loops 3 and 4. Loop 4 presents a well-defined helix. Porins, like OmpG, are embedded in the outer membrane of bacteria and facilitate uptake and secretion of nutrients and ions. Here the authors present a protocol for solid state NMR structure determination of proteins larger than 25 kDa and use it to structurally characterize membrane embedded OmpG.
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影响因子:
14.9
作者:
Bagos, PG;Liakopoulos, TD;Hamodrakas, SJ
通讯作者:
Hamodrakas, SJ
影响因子:
2.7
作者:
Hong, M;Jakes, K
通讯作者:
Jakes, K
影响因子:
14.9
作者:
Keseler IM;Collado-Vides J;Santos-Zavaleta A;Peralta-Gil M;Gama-Castro S;Muñiz-Rascado L;Bonavides-Martinez C;Paley S;Krummenacker M;Altman T;Kaipa P;Spaulding A;Pacheco J;Latendresse M;Fulcher C;Sarker M;Shearer AG;Mackie A;Paulsen I;Gunsalus RP;Karp PD
通讯作者:
Karp PD
影响因子:
15
作者:
Andreas LB;Reese M;Eddy MT;Gelev V;Ni QZ;Miller EA;Emsley L;Pintacuda G;Chou JJ;Griffin RG
通讯作者:
Griffin RG
DOI:
10.1007/978-1-61779-480-3_23
发表时间:
2012-01-01
期刊:
PROTEIN NMR TECHNIQUES, THIRD EDITION
影响因子:
--
作者:
Bardiaux, Benjamin;Malliavin, Therese;Nilges, Michael
通讯作者:
Nilges, Michael