Two-step procedure for purification and separation of the essential penicillin-binding proteins PBP 1A and 1Bs of Escherichia coli.
The penicillin-binding proteins PBP 1A and 1Bs are the essential murein polymerases of Escherichia coli. Purification of these membrane-bound bifunctional transglycosylase-transpeptidases was a major obstacle in studying the details of both enzymatic reactions. Here we describe a simple, highly specific affinity chromatography method that takes advantage of the availability of the specific inhibitor of the transglycosylase site moenomycin A in order to enrich PBP 1A and 1Bs in one step from crude membrane preparations. Separation of PBP 1A from PBP 1Bs is achieved in a second step employing cation exchange chromatography yielding enzymatically active native murein polymerases.
Max-Planck-Institut für Entwicklungsbiologie, Abteilung Biochemie, Spemannstrasse 35, 72076, Tübingen, Germany.
M
M
von Rechenberg
J V
JV
Höltje
D001426:Bacterial Proteins; D002352:Carrier Proteins; D004926:Escherichia coli / Q000378:metabolism*; D006602:Hexosyltransferases / Q000302:isolation & purification* / Q000378:metabolism; D009097:Multienzyme Complexes / Q000302:isolation & purification* / Q000378:metabolism; D002267:Muramoylpentapeptide Carboxypeptidase; D046915:Penicillin-Binding Proteins; D010458:Peptidyl Transferases / Q000302:isolation & purification* / Q000378:metabolism
D001426:Bacterial Proteins; D002352:Carrier Proteins; D009097:Multienzyme Complexes; D046915:Penicillin-Binding Proteins; D010458:Peptidyl Transferases; D006602:Hexosyltransferases; D002267:Muramoylpentapeptide Carboxypeptidase