Mutation of the arginine finger in the active site of Escherichia coli DbpA abolishes ATPase and helicase activity and confers a dominant slow growth phenotype.
Mutation of the arginine finger in the active site of Escherichia coli DbpA abolishes ATPase and helicase activity and confers a dominant slow growth phenotype.
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DOI:
10.1093/nar/gkm926
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发表时间:
2008-01
影响因子:
14.9
通讯作者:
Uhlenbeck, Olke C.
中科院分区:
文献类型:
--
作者:
Elles, Lisa M. Sharpe;Uhlenbeck, Olke C.
Escherichia coli DEAD-box protein A (DbpA) is an ATP-dependent RNA helicase with specificity for 23S ribosomal RNA. Although DbpA has been extensively characterized biochemically, its biological function remains unknown. Previous work has shown that a DbpA deletion strain is viable with little or no effect on growth rate. In attempt to elucidate a phenotype for DbpA, point mutations were made at eleven conserved residues in the ATPase active site, which have exhibited dominant-negative phenotypes in other DExD/H proteins. Biochemical analysis of these DbpA mutants shows the expected decrease in RNA-dependent ATPase activity and helix unwinding activity. Only the least biochemically active mutation, R331A, produces small colony phenotype and a reduced growth rate. This dominant slow growth mutant will be valuable to determine the cellular function of DbpA.
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影响因子:
14.9
作者:
Daugeron, ML;Linder, P
通讯作者:
Linder, P
影响因子:
4.8
作者:
Karginov, FV;Caruthers, JM;Uhlenbeck, OC
通讯作者:
Uhlenbeck, OC
影响因子:
4.8
作者:
Schneider, S;Hotz, HR;Schwer, B
通讯作者:
Schwer, B
影响因子:
5.3
作者:
SCHMID, SR;LINDER, P
通讯作者:
LINDER, P
DOI:
10.1073/pnas.97.24.13080
发表时间:
2000-11-21
影响因子:
11.1
作者:
Caruthers, JM;Johnson, ER;McKay, DB
通讯作者:
McKay, DB