Linked Life Data

6426510

Source:http://linkedlifedata.com/resource/pubmed/id/6426510

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
9
pubmed:dateCreated
1984-7-11
pubmed:abstractText
DNA polymerase delta from calf thymus has been purified to apparent homogeneity by a new procedure which utilizes hydrophobic interaction chromatography with phenyl-Sepharose at an early step to separate most of the calcium-dependent protease activity from DNA polymerase delta and alpha. The purified enzyme migrates as a single protein band on polyacrylamide gel electrophoresis under nondenaturing conditions. The sedimentation coefficient of the enzyme is 7.9 S, and the Stokes radius is 53 A. A molecular weight of 173K has been calculated for the native enzyme. Sodium dodecyl sulfate-polyacrylamide gel electrophoresis of the homogeneous enzyme reveals two polypeptides of 125 and 48 kDa. This subunit structure differs from that of DNA polymerase delta prepared by our previous procedure, which was composed of subunits of 60 and 49 kDa [Lee, M. Y. W. T., Tan, C.-K., Downey , K. M., & So, A. G. (1981) Prog . Nucleic Acid Res. Mol. Biol. 26, 83-96], suggesting that the 60-kDa polypeptide may have been derived from the 125-kDa polypeptide during enzyme purification, possibly as the result of cleavage of an unusually sensitive peptide bond. DNA polymerase delta is separated from DNA polymerase alpha by hydrophobic interaction chromatography on phenyl-Sepharose; DNA polymerase delta is eluted at pH 7.2 and DNA polymerase alpha at pH 8.5. DNA polymerase delta can also be separated from DNA polymerase alpha by chromatography on hydroxylapatite; DNA polymerase alpha binds to hydroxylapatite in the presence of 0.5 M KCl, whereas DNA polymerase delta is eluted at 90 mM KCl.(ABSTRACT TRUNCATED AT 250 WORDS)
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Apr
pubmed:issn
0006-2960
pubmed:author
pubmed:issnType
Print
pubmed:day
24
pubmed:volume
23
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
1906-13
pubmed:dateRevised
2007-11-14
pubmed:meshHeading
pubmed:year
1984
pubmed:articleTitle
Further studies on calf thymus DNA polymerase delta purified to homogeneity by a new procedure.
pubmed:publicationType
Journal Article, Comparative Study, Research Support, U.S. Gov't, P.H.S.