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Predicate | Object |
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rdf:type | |
lifeskim:mentions | |
pubmed:issue |
1
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pubmed:dateCreated |
1978-5-8
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pubmed:abstractText |
Neuraminidase (EC 3.2.1.18) from an Arthrobacter species was purified homogeneity by conventional procedures (yield approx. 1 mg/1) and was judged to be homogeneous by sodium dodecyl sulfate gel electrophoresis. Gel electrofocusing of neuraminidase revealed 1 major band (85-90%), pI 5.35 +/- 0.05, and 6 minor bands, whose pI ranged from 5.25 to 5.70, and each of which had catalytic activity. Arthrobacter neuraminidase is a monomeric glycoprotein of molecular weight 88 000, has an apparent Km of 7.8-10(-4) M for N-acetylneuraminlactose, is insensitive to inhibition by N-acetylneuraminic acid, and is about 2% carbohydrate by weight. The amino acid composition as well as the galactosamine and glucosamine content was determined. The enzyme can hydrolyze (alpha, 2-3), (alpha, 2-6), (alpha, 2-8) linkages. The active size of the enzyme appears to be inaccessible since no inhibition was observed by reagents known to modify sulfhydryl, lysyl, carboxyl, histidinyl, and argininyl residues. In contrast, N-bromosuccinimide at a 60-fold molar ratio to enzyme, gave complete inhibition. These results suggest that a tryptophan residue is essential for catalysis.
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pubmed:language |
eng
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pubmed:journal | |
pubmed:citationSubset |
IM
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pubmed:chemical | |
pubmed:status |
MEDLINE
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pubmed:month |
Mar
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pubmed:issn |
0006-3002
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pubmed:author | |
pubmed:issnType |
Print
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pubmed:day |
14
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pubmed:volume |
523
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pubmed:owner |
NLM
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pubmed:authorsComplete |
Y
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pubmed:pagination |
170-80
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pubmed:dateRevised |
2000-12-18
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pubmed:meshHeading | |
pubmed:year |
1978
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pubmed:articleTitle |
Purification and properties of Arthrobacter neuraminidase.
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pubmed:publicationType |
Journal Article
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