A 7.4-Å projection structure of outer membrane phospholipase A from Escherichia coli by electron crystallography

被引:8
|
作者
Boekema, EJ
Stuart, M
Koning, RI
Keegstra, W
Brisson, A
Verheij, HM
Dekker, N
机构
[1] Univ Groningen, Groningen Biomol Sci & Biotechnol Inst, Dept Biophys Chem, NL-9747 AG Groningen, Netherlands
[2] Univ Utrecht, Biomembrane Inst, Dept Enzymol & Prot Engn, Ctr Biomembranes & Lipid Enzymol, Utrecht, Netherlands
关键词
D O I
10.1006/jsbi.1998.4013
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
Outer membrane phospholipase A (OMPLA) is one of the few enzymes present in the outer membrane of Escherichia coli. Two-dimensional crystals of OMPLA were grown by reconstitution of purified protein into lipid bilayers via detergent dialysis and were studied by electron crystallography. A 7.4-Angstrom projection map reveals OMPLA molecules exhibiting an oval-shaped domain of 30 x 20 Angstrom resembling the beta-barrel structure characteristic of porins, which is associated with a 25-Angstrom elongated domain of lower density. (C) 1998 Academic Press.
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收藏
页码:67 / 71
页数:5
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