Chalut C, Remy M H, Masson J M
Institut de Pharmacologie et de Biologie Structurale du CNRS, Toulouse, France.
J Bacteriol. 1999 May;181(9):2970-2. doi: 10.1128/JB.181.9.2970-2972.1999.
PBP1b can be found as a dimer in Escherichia coli. Previous results suggested that dimerization involved the cysteine(s) in an intermolecular disulfide bond. We show that either deletion mutants or a mutant without cysteines is fully active and still binds penicillin and that the latter can also form dimers.
PBP1b在大肠杆菌中以二聚体形式存在。先前的结果表明,二聚化涉及分子间二硫键中的半胱氨酸。我们发现,缺失突变体或不含半胱氨酸的突变体都具有完全活性,仍能结合青霉素,并且后者也能形成二聚体。