The Domains of Mammalian Base Excision Repair Enzyme N-Methylpurine-DNA Glycosylase
The Domains of Mammalian Base Excision Repair Enzyme N-Methylpurine-DNA Glycosylase
复制标题
哺乳动物碱基切除修复酶 N-甲基嘌呤-DNA 糖基化酶的结构域
DOI:
--
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发表时间:
1996
影响因子:
4.8
通讯作者:
S. Mitra
中科院分区:
文献类型:
--
作者:
R. Roy;Amalendra Kumar;J. Lee;S. Mitra
Repair of a variety of alkylated base adducts in DNA is initiated by their removal by N-methylpurine-DNA glycosylase. The 31-kDa mouse N-methylpurine-DNA glycosylase, derived by deletion of 48 amino acid residues from the 333-residue wild type protein without loss of activity, was analyzed for the presence of protease-resistant domains with specific roles in substrate binding and catalysis. Increasing proteolysis with trypsin generated first a 29-kDa polypeptide by removal of 42 amino-terminal residues, followed by production of 8-, 6-, and 13-kDa fragments with defined, nonoverlapping boundaries. The 8- and 13-kDa domains include the amino and carboxyl termini, respectively. Based on DNA-affinity chromatography and the protease protection assay, it appears that the 6- and 13-kDa domains are necessary for nontarget DNA binding and that the 8-kDa domain, in cooperation with the other two domains, participates in recognition of damaged bases. Furthermore, chemical cross-linking studies indicated that, in the presence of substrate DNA, the 8- and 6-kDa domains undergo conformational changes reflected by both protection from proteolysis and reduced availability of cysteine residues for the thiol-exchange reaction.
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DOI:
10.1002/9780470110560.ch4
发表时间:
1991
期刊:
Methods of biochemical analysis
影响因子:
--
作者:
Wilson,JE
通讯作者:
Wilson,JE
影响因子:
56.9
作者:
AMES, BN
通讯作者:
AMES, BN
DOI:
--
发表时间:
1994
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Brasier,AR;Kumar,A
通讯作者:
Kumar,A
DOI:
10.1016/s0021-9258(18)48324-x
发表时间:
1987-05
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
S. Randall;Ramon Eritjaj;Bruce E. Kaplanj;John PetruskaS;M. Goodman
通讯作者:
S. Randall;Ramon Eritjaj;Bruce E. Kaplanj;John PetruskaS;M. Goodman
DOI:
10.1073/pnas.90.19.8901
发表时间:
1993-10-01
影响因子:
11.1
作者:
BESSHO, T;ROY, R;MITRA, S
通讯作者:
MITRA, S