1887

Abstract

The inducible cholinesterase of strain K (ATCC 25102) degraded propionylcholine, acetylthiocholine, acetylcholine and acetyl--methylcholine at a high rate and butyrylcholine and succinylcholine at very low rates. The localization of the enzyme in the periplasmic space was indicated by a similar rate of acetylcholine degradation by intact cells or their extracts, by release of cholinesterase together with alkaline phosphatase into the culture medium during cell growth in a low phosphate-containing medium, by liberation of cholinesterase and alkaline phosphatase during lysozyme-induced conversion of cells to spheroplasts and by freezing and thawing. Treatment of cells with diazo-7-amino-1,3-naphthalenedisulphonic acid, which inactivates surface-located enzymes, abolished most of the cholinesterase and 5′-nucleotidase activities.

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1980-03-01
2021-08-05
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