Identification and Characterization of Human DNA Polymerase β2, a DNA Polymerase β-Related Enzyme*
Identification and Characterization of Human DNA Polymerase β2, a DNA Polymerase β-Related Enzyme*
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人类 DNA 聚合酶 β2(一种 DNA 聚合酶 β 相关酶)的鉴定和表征*
DOI:
--
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发表时间:
2000
影响因子:
4.8
通讯作者:
M. Nakanishi
中科院分区:
文献类型:
--
作者:
K. Nagasawa;K. Kitamura;A. Yasui;Y. Nimura;K. Ikeda;M. Hirai;A. Matsukage;M. Nakanishi
The BRCA1 COOH terminus (BRCT) motif is present in many nuclear proteins that contribute to cell cycle regulation or DNA repair. Polymerase chain reaction-based screening with degenerate primers targeted to the BRCT motif resulted in the isolation of a human cDNA for a previously unidentified DNA polymerase (designated DNA polymerase β2) that is closely related to DNA polymerase β (Pol β). The predicted Pol β2 protein contains a BRCT motif in its NH2-terminal region; its COOH-terminal region exhibits 33% sequence identity to a corresponding region of human Pol β. The Pol β2 gene is expressed in a tissue-specific manner, with transcripts being most abundant in testis. A fusion construct comprising Pol β2 and green fluorescent protein exhibited a predominantly nuclear localization in transfected HeLa cells. Recombinant human Pol β2 from insect cells exhibited substantial DNA polymerase activity, but it did not possess terminal deoxyribonucleotidyl transferase activity. A truncated Pol β2 mutant lacking the BRCT motif retained substantial DNA polymerase activity, whereas a mutant Pol β2 with two alanine point mutations within the DNA polymerase active site did not. These results indicate that Pol β2 is a Pol β-related DNA polymerase with a BRCT motif that is dispensable for its polymerase activity.
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影响因子:
14.9
作者:
HORTON, JK;SRIVASTAVA, DK;WILSON, SH
通讯作者:
WILSON, SH
影响因子:
2.9
作者:
Hammond,RA;McClung,JK;Miller,MR
通讯作者:
Miller,MR
影响因子:
56.9
作者:
PELLETIER, H;SAWAYA, MR;KRAUT, J
通讯作者:
KRAUT, J
DOI:
--
发表时间:
1995
期刊:
Biochemistry and molecular biology international.
影响因子:
--
作者:
Yan,ZJ;Roy,D
通讯作者:
Roy,D
影响因子:
5.3
作者:
Chang,CD;Ottavio,L;Travali,S;Lipson,KE;Baserga,R
通讯作者:
Baserga,R