Characterization of cDNA encoding mouse DNA repair protein O6-methylguanine-DNA methyltransferase and high-level expression of the wild-type and mutant proteins in Escherichia coli.
Characterization of cDNA encoding mouse DNA repair protein O6-methylguanine-DNA methyltransferase and high-level expression of the wild-type and mutant proteins in Escherichia coli.
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编码小鼠 DNA 修复蛋白 O6-甲基鸟嘌呤-DNA 甲基转移酶的 cDNA 的表征以及野生型和突变蛋白在大肠杆菌中的高水平表达。
DOI:
10.1021/bi00122a001
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发表时间:
1992
期刊:
影响因子:
2.9
通讯作者:
Mitra,S
中科院分区:
文献类型:
--
作者:
Shiota,S;vonWronski,MA;Tano,K;Bigner,DD;Brent,TP;Mitra,S
University of Tennessee—Oak Ridge Graduate School of Biomedical Sciences and Biology Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, Department of Pharmacology, St. Jude Children's Research Hospital, Memphis, Tennessee 38101, and Department of Pathology, Duke University Medical Center, Durham, North Carolina 27710 Received August 7, 1991; Revised Manuscript Received November 22, 1991 abstract: A mouse cDNA clone encoding C^-methylguanine-DNA methyltransferase (MGMT), responsible for repair of mutagenic C^-alkylguanine in DNA, was cloned from a Xgtl 1 library. On the basis of an open reading frame in cDNA, the mouse protein contains 211 amino acids with a molecular mass of 22 kDa. The size andthe predicted N-terminal sequence of the mouse protein were confirmed experimentally. The deduced amino acid sequence of the mouse MGMT is 70% homologous tothat of the human MGMT. Cysteine-149 was shown to be the onlyalkyl acceptor residue in the mouse protein, in confirmation of the prediction based on conserved sequences of different MGMTs. Mouse MGMT protein is recognized by some monoclonal antibodies specific for human MGMT. Site-directed mutagenesis was utilized to redone the mouse cDNA in a T7 promoter-based vector for overexpression of the nativerepair protein in Escherichia coli. The mouse protein has a tetrapeptide sequence, Pro-Glu-Gly-Val at positions 56-59, absent in the human protein. Neither deletion of this tetrapeptide nor substitution of valine-169 with alanine affected the activity of the mutant proteins.
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DOI:
10.1016/s0021-9258(18)61070-1
发表时间:
1987-07
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
P. Matsudaira
通讯作者:
P. Matsudaira
影响因子:
14.9
作者:
HEMSLEY, A;ARNHEIM, N;GALAS, DJ
通讯作者:
GALAS, DJ
影响因子:
64.8
作者:
M. Mathews;M. Osborn;J. Lingrel
通讯作者:
J. Lingrel
DOI:
--
发表时间:
1989
期刊:
Mutation research
影响因子:
--
作者:
Ken ichi Kodama;Y. Nakabeppu;Mutsuo Sekiguchi
通讯作者:
Mutsuo Sekiguchi
影响因子:
2.4
作者:
PEGG, AE
通讯作者:
PEGG, AE