Display of beta-lactamase on the Escherichia coli surface: Outer membrane phenotypes conferred by Lpp'-OmpA'-beta-lactamase fusions

被引:93
作者
Georgiou, G
Stephens, DL
Stathopoulos, C
Poetschke, HL
Mendenhall, J
Earhart, CF
机构
[1] UNIV TEXAS,DEPT MICROBIOL,AUSTIN,TX 78712
[2] UNIV TEXAS,DEPT BOT,AUSTIN,TX 78712
[3] UNIV TEXAS,DIV BIOL SCI,AUSTIN,TX 78712
来源
PROTEIN ENGINEERING | 1996年 / 9卷 / 02期
基金
美国国家科学基金会;
关键词
bacterial cell-surface engineering; Escherichia coli; fusion protein; beta-lactamase; lipoprotein; OmpA;
D O I
10.1093/protein/9.2.239
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
Bacterial cell-surface exposure of foreign peptides and soluble proteins has been achieved recently by employing a fusion protein methodology, An Lpp'-OmpA(46-159)-Bla fusion protein has been shown previously to display the normally periplasmic enzyme beta-lactamase (Bla) on the cell surface of the Gram-negative bacterium Escherichia coli, Here, we have investigated the role of the OmpA domain of the tripartite fusion protein in the surface display of the passenger domain (Bla) and have characterized the effects of the fusion proteins on the integrity and permeability of the outer membrane, We show that in addition to OmpA(46-159), a second OmpA segment, consisting of amino acids 46-66, can also mediate the display of Bla on the cell surface, Other OmpA domains of various lengths (amino acids 46-84, 46-109, 46-128, 46-141 and 46-145) either anchored the Bla domain on the periplasmic face of the outer membrane or caused a major disruption of the outer membrane, allowing the penetration of antibodies into the cell, Detergent and antibiotic sensitivity and periplasmic leakage assays showed that changes in the permeability of the outer membrane are an unavoidable consequence of displaying a large periplasmic protein on the surface of E.coli. This is the first systematic report on the effects that cell surface engineering may have on the integrity and permeability properties of bacterial outer membranes.
引用
收藏
页码:239 / 247
页数:9
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