The role of membrane destabilisation and protein dynamics in BAM catalysed OMP folding.
The role of membrane destabilisation and protein dynamics in BAM catalysed OMP folding.
复制标题
膜不稳定和蛋白质动力学在BAM催化的OMP折叠中的作用。
DOI:
10.1038/s41467-021-24432-x
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发表时间:
2021-07-07
影响因子:
16.6
通讯作者:
Radford SE
中科院分区:
文献类型:
--
作者:
White P;Haysom SF;Iadanza MG;Higgins AJ;Machin JM;Whitehouse JM;Horne JE;Schiffrin B;Carpenter-Platt C;Calabrese AN;Storek KM;Rutherford ST;Brockwell DJ;Ranson NA;Radford SE
The folding of β-barrel outer membrane proteins (OMPs) in Gram-negative bacteria is catalysed by the β-barrel assembly machinery (BAM). How lateral opening in the β-barrel of the major subunit BamA assists in OMP folding, and the contribution of membrane disruption to BAM catalysis remain unresolved. Here, we use an anti-BamA monoclonal antibody fragment (Fab1) and two disulphide-crosslinked BAM variants (lid-locked (LL), and POTRA-5-locked (P5L)) to dissect these roles. Despite being lethal in vivo, we show that all complexes catalyse folding in vitro, albeit less efficiently than wild-type BAM. CryoEM reveals that while Fab1 and BAM-P5L trap an open-barrel state, BAM-LL contains a mixture of closed and contorted, partially-open structures. Finally, all three complexes globally destabilise the lipid bilayer, while BamA does not, revealing that the BAM lipoproteins are required for this function. Together the results provide insights into the role of BAM structure and lipid dynamics in OMP folding. The folding of outer membrane proteins (OMPs) is catalyzed by the βbarrel assembly machinery (BAM). Here, structural and functional analyses of BAM stabilized in distinct conformations elucidate the roles of lateral gate opening and interactions of BAM with the lipid bilayer in OMP assembly.
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DOI:
10.1107/s0907444904019158
发表时间:
2004-12-01
影响因子:
2.2
作者:
Emsley, P;Cowtan, K
通讯作者:
Cowtan, K
DOI:
10.1126/science.aad3460
发表时间:
2016-01-08
期刊:
Science (New York, N.Y.)
影响因子:
--
作者:
Bakelar J;Buchanan SK;Noinaj N
通讯作者:
Noinaj N
影响因子:
2.9
作者:
Andersen, Kell K.;Wang, Huabing;Otzen, Daniel E.
通讯作者:
Otzen, Daniel E.
影响因子:
3.4
作者:
Fleming, Patrick J.;Patel, Dhilon S.;Im, Wonpil
通讯作者:
Im, Wonpil
DOI:
10.1073/pnas.1415955112
发表时间:
2015-02-17
影响因子:
11.1
作者:
Hagan, Christine L.;Wzorek, Joseph S.;Kahne, Daniel
通讯作者:
Kahne, Daniel