UvrD may refer to: UvrABC endonuclease, an enzyme; DNA helicase, an enzyme class Strongly sensitive to UV, ciprofloxacin (CFX), and azidothymidine (AZT) in single deletion mutants, radA-uvrD double deletions are more sensitive yet. Adding recF mutations almost completely suppresses AZT and partially suppresses UV and CFX sensitivity, suggesting RadA processes a class of intermediates that accumulate in uvrD mutants (PubMed: 25484163 ). 1 Publication aspects of UvrD mechanism are intriguing. UvrD is known to load at single-stranded/ double-stranded junctions and, depending on its oligmeric state, translocate on single-stranded DNA as a monomer or unwind duplex DNA as a dimer.3 Therefore, the assembly state of UvrD as it pulls RNA polymerase backward is of interest. Second, UvrD can strand switch Escherichia coli UvrD is a superfamily 1 DNA helicase and single-stranded DNA (ssDNA) translocase that functions in DNA repair and plasmid replication and as an anti-recombinase by removing RecA protein from ssDNA.
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2008-03-15 · UvrD from E. coli is a 73-kDa protein and was characterized as DNA helicase II (Kumura and Sekiguchi, 1984). UvrD and Rep belong to the SF1 family, which shares 40% amino-acid identity and these are remarkably similar to the PcrA helicase of Gram-positive bacteria. The uvrD gene of E. coli encodes a DNA-dependent ATPase. Nature 298:98-100; Arthur, H.M., P.B. Eastlake 1983. Transcriptional control of the uvrD gene of Escherichia coli. Gene 25:309-316; Easton, A.M., S.R. Kushner 1983.
This score cannot be used as a measure of the accuracy of the annotation as we cannot define the 'correct annotation' for any given protein. The kinetic mechanism by which the DNA repair helicase UvrD of Escherichia coli unwinds duplex DNA was examined with the use of a series of oligodeoxynucleotides with duplex regions ranging from 10 to 40 base pairs. Single-turnover unwinding experiments showed distinct lag phases that increased with duplex length because partially unwound DNA intermediate states are highly populated during However, UvrD unwinds duplex DNA with a specific polarity (39, 53, 62, 67).
Tte UvrD Helicase: M1202: Tte UvrD Helicase is a repair helicase capable of unwinding double-stranded DNA, without a requirement for a specific flap or overhang structure, from the thermophilic organism Thermoanaerobacter tengcongensis. Tth Argonaute: M0665 Moreover, the two distinct activities correlate with the number of UvrD helicases present on the DNA hairpin, measured by counting singly labeled UvrD . When we observed frustrated unwinding activity, we usually detected only a single fluorophore, indicating a single UvrD loaded ( Fig. 2A , top panel).
Nature 298:98-100; Arthur, H.M., P.B. Eastlake 1983.
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An oligomeric form of E. coli UvrD is required for optimal helicase activity. Pre-steady-state chemical quenched-flow techniques were used to study DNA unwinding catalyzed by Escherichia coli UvrD helicase (helicase II), a member of the SF1 helicase superfamily.
Database: Pfam Entry: UvrD_C LinkDB: UvrD_C Original site: UvrD_C All links .
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In this scheme, the lethality of the rep uvrD mutant should be suppressed also by a recA mutation, but we have already shown that this was not the case (Petit and Ehrlich, 2002). 2013-10-15 · DNA helicases are responsible for unwinding the duplex DNA, a key step in many biological processes. UvrD is a DNA helicase involved in several DNA repair pathways.