Cloning and Expression of the Heterodimeric Deoxyguanosine Kinase/Deoxyadenosine Kinase of Lactobacillus acidophilus R-26 (*)
Cloning and Expression of the Heterodimeric Deoxyguanosine Kinase/Deoxyadenosine Kinase of Lactobacillus acidophilus R-26 (*)
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嗜酸乳杆菌 R-26 异二聚脱氧鸟苷激酶/脱氧腺苷激酶的克隆和表达 (*)
DOI:
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发表时间:
1995
影响因子:
4.8
通讯作者:
D. H. Ives
中科院分区:
文献类型:
--
作者:
G. Ma;Young;D. H. Ives
Two uniquely paired deoxynucleoside kinases, deoxycytidine kinase/deoxyadenosine kinase (dCK/dAK) and deoxyguanosine kinase/deoxyadenosine kinase (dGK/dAK) are required, together with thymidine kinase (TK), for deoxynucleotide synthesis in Lactobacillus acidophilus R-26. Using polymerase chain reaction-generated probes based on N-terminal amino acid sequences, we have cloned tandem genes for 25- and 26-kDa polypeptides, whose derived amino acid sequences and size correspond to wild-type Lactobacillus enzyme subunits. Expression in Escherichia coli uses a single endogenous promoter and yields active dGK/dAK (3% of extracted protein) closely resembling wild-type dGK/dAK in specificity, kinetics, heterotropic activation, and end product inhibition. Alignment of cloned genes reveals 65% identity in their DNA sequences and 61% identity in derived amino acid sequences. Comparison with herpesviral TKs reveals three conserved regions: glycine- and arginine-rich ATP-binding motifs and a D/E-R-S/H motif at the putative TK deoxynucleoside site. Greater homology, however, is seen upon multiple alignment of dGK with mammalian deoxycytidine kinases, yielding the consensus sequence -D/E-R-S-I/V-Y-x-D-. dGK also shares a sequence (-Y-D-P-T-I/L-E-D-S/Y-Y-) required for GTP hydrolysis by p21.
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影响因子:
2.9
作者:
Ikeda,S;Ives,DH
通讯作者:
Ives,DH
影响因子:
2.9
作者:
Yan,HG;Shi,ZT;Tsai,MD
通讯作者:
Tsai,MD
DOI:
10.1073/pnas.88.4.1531
发表时间:
1991-02-01
影响因子:
11.1
作者:
CHOTTINER, EG;SHEWACH, DS;MITCHELL, BS
通讯作者:
MITCHELL, BS
影响因子:
2.9
作者:
Ikeda,S;Ma,GT;Ives,DH
通讯作者:
Ives,DH
影响因子:
2.9
作者:
D. Dube;J. D. Parker;D. C. French;D. Cahill;S. Dube;M. Horwitz;K. Munir;L. Loeb
通讯作者:
D. Dube;J. D. Parker;D. C. French;D. Cahill;S. Dube;M. Horwitz;K. Munir;L. Loeb