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• W1965582785 startingPage "1097" @default.
• W1965582785 abstract "The disordered mobile loop L2 of the Escherichia coli RecA protein is known to play a central role in DNA binding and pairing. To investigate the local chemical environment in relation to function we performed saturation mutagenesis of the loop L2 region (amino acid positions 193-212) using a site-directed mutagenesis procedure, and determined the recombinational proficiency of the 380 mutants using genetic assays for homologous recombination and recombinational repair. Residues Asn193, Gln194, Arg196, Glu207, Thr209, Gly211, and Gly212 were identified as stringently required for recombinational events in bacterial cells. In addition, our findings suggest the involvement of loop L2 in the ATPase activity of RecA, and a role for residues Gln194, Arg196, Lys198 and Thr209 in the DNA-dependent hydrolysis of ATP. Finally, since 20 residue peptides that comprise this region can pair homologous DNAs by forming filamentous beta-structures, we propose how the information from the mutant analysis might facilitate the use of a simplified amino acid alphabet to design beta-structure forming L2 peptides with improved RecA-like activities." @default.
• W1965582785 created "2016-06-24" @default.
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• W1965582785 date "1999-03-01" @default.
• W1965582785 modified "2023-10-16" @default.
• W1965582785 title "Saturation mutagenesis of the E. coli RecA loop L2 homologous DNA pairing region reveals residues essential for recombination and recombinational repair 1 1Edited by M. Gottesman" @default.
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• W1965582785 doi "https://doi.org/10.1006/jmbi.1998.2515" @default.
• W1965582785 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/10047484" @default.
• W1965582785 hasPublicationYear "1999" @default.
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