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Predicate | Object |
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rdf:type | |
lifeskim:mentions | |
pubmed:issue |
3
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pubmed:dateCreated |
1979-11-28
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pubmed:abstractText |
This paper describes a purification procedure and some properties of a nonspecific nucleoside phosphotransferase of chick embryo, an activity which catalyzes the transfer of chick embryo, an activity which catalyzes the transfer of the phosphate ester from a deoxyribonucleotide or a pyrimidine ribonucleotide to a deoxyribonucleoside acceptor. The enzyme is very unstable to heat, dilution and dialysis and it is almost entirely inactivated by DEAE-cellulose chromatography or gel filtration. A marked enhancement in its stability is caused by numerous nucleotides. In these experiments at least 920-fold purification was obtained by using dTTP (50 microM) as nucleotide protector. The enzyme, purified in presence of dTTP, has a molecular weight about 270,000, an isoelectric point of 6.27, a pH optimum of 8.8 and is stable at 37 degrees C at least for 10 min. In absence of nucleotide protector, nucleoside phosphofranserferase is connected at 37 degrees C or by gel filtration in a very small active form with a lower molecular weight (about 30,000) and a pH optimum of 7.6.
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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 |
Jun
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pubmed:issn |
0300-8177
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pubmed:author | |
pubmed:issnType |
Print
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pubmed:day |
15
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pubmed:volume |
25
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pubmed:owner |
NLM
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pubmed:authorsComplete |
Y
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pubmed:pagination |
171-8
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pubmed:dateRevised |
2003-11-14
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pubmed:meshHeading |
pubmed-meshheading:39250-Animals,
pubmed-meshheading:39250-Chick Embryo,
pubmed-meshheading:39250-Chromatography, Gel,
pubmed-meshheading:39250-Hydrogen-Ion Concentration,
pubmed-meshheading:39250-Molecular Weight,
pubmed-meshheading:39250-Substrate Specificity,
pubmed-meshheading:39250-Thymidine Kinase
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pubmed:year |
1979
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pubmed:articleTitle |
Nucleoside phosphotransferase of chick embryo.
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pubmed:publicationType |
Journal Article
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