The Membrane‐Integrated Steric Chaperone Lif Facilitates Active Site Opening of Pseudomonas aeruginosa Lipase A
The Membrane‐Integrated Steric Chaperone Lif Facilitates Active Site Opening of Pseudomonas aeruginosa Lipase A
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膜-集成空间伴侣 Lif 促进铜绿假单胞菌脂肪酶 A 活性位点的开放
DOI:
10.1002/jcc.26085
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发表时间:
2020
影响因子:
3
通讯作者:
Gohlke
中科院分区:
文献类型:
--
作者:
Dollinger;Kovacic;Jaeger;Gohlke
Lipases are essential and widely used biocatalysts. Hence, the production of lipases requires a detailed understanding of the molecular mechanism of its folding and secretion. Lipase A fromPseudomonas aeruginosa,PaLipA, constitutes a prominent example that has additional relevance because of its role as a virulence factor in many diseases.PaLipA requires the assistance of a membrane‐integrated steric chaperone, the lipase‐specific foldase Lif, to achieve its enzymatically active state. However, the molecular mechanism of how Lif activates its cognate lipase has remained elusive. Here, we show by molecular dynamics simulations at the atomistic level and potential of mean force computations that Lif catalyzes the activation process ofPaLipA by structurally stabilizing an intermediatePaLipA conformation, particularly a β‐sheet in the region of residues 17–30, such that the opening ofPaLipA's lid domain is facilitated. This opening allows substrate access toPaLipA's catalytic site. A surprising and so far not fully understood aspect of our study is that the open state ofPaLipA is unstable compared to the closed one according to our computational andin vitrobiochemical results. We thus speculate that further interactions ofPaLipA with the Xcp secretion machinery and/or components of the extracellular matrix contribute to the remaining activity of secretedPaLipA. © 2019 Wiley Periodicals, Inc.
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DOI:
10.1021/acs.jpcb.8b07686
发表时间:
2018
期刊:
The journal of physical chemistry. B
影响因子:
--
作者:
Lee,HuiSun;Oh,Yeonock;Kim,Mahn-Joo;Im,Wonpil
通讯作者:
Im,Wonpil
DOI:
10.1007/s004380050020
发表时间:
1999
期刊:
Molecular and General Genetics MGG
影响因子:
--
作者:
M. El Khattabi;C. Ockhuijsen;W. Bitter;K. Jaeger;J. Tommassen
通讯作者:
J. Tommassen
影响因子:
4.6
作者:
Giulia Pagani;H. Gohlke
通讯作者:
H. Gohlke
影响因子:
3.7
作者:
Pauwels K;Sanchez del Pino MM;Feller G;Van Gelder P
通讯作者:
Van Gelder P
DOI:
10.1007/978-1-4939-0473-0_12
发表时间:
2014-01-01
期刊:
PSEUDOMONAS: METHODS AND PROTOCOLS
影响因子:
--
作者:
Jaeger, Karl-Erich;Kovacic, Filip
通讯作者:
Kovacic, Filip