McArthur HA, Reynolds PE. The solubilisation of the membrane-bound D-alanyl-D-alanine carboxypeptidase of Bacillus coagulans NCIB 9365.
BIOCHIMICA ET BIOPHYSICA ACTA 1979;
568:395-407. [PMID:
39605 DOI:
10.1016/0005-2744(79)90308-5]
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Abstract
Protoplast membranes and the particulate D,D-carboxypeptidase of Bacillus coagulans NCIB 9365 were extremely resistant to disruption by either detergents or urea. A combination of urea and the non-ionic detergent Genapol X-100 was required to achieve a significant solubilisation of membrane protein and D,D-carboxypeptidase in an active form; the pH optimum for this treatment was pH 7.5. Solubilisation of the enzyme was accompanied by a two-fold enhancement of activity. Kinetic results indicated that the enhancement may be due to an alteration in the conformation of the enzyme following disruption of membrane structure.
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