Substrate ambiguity among the nudix hydrolases: biologically significant, evolutionary remnant, or both?
McLennan AG.SourceInstitute of Integrative Biology, University of Liverpool, Biosciences Building, Crown St., Liverpool, L69 7ZB, UK, agmclen@liv.ac.uk.
Cellular and molecular life sciences : CMLS.Cell Mol Life Sci.2013 Feb;70(3):373-85. doi: 10.1007/s00018-012-1210-3. Epub 2012 Nov 27.
Many members of the nudix hydrolase family exhibit considerable substrate multispecificity and ambiguity, which raises significant issues when assessing their functions in vivo and gives rise to errors in database annotation. Several display low antimutator activity when expressed in bacterial teste
Emergence of DNA Polymerase {epsilon} Antimutators that Escape Error-Induced Extinction in Yeast.
Williams LN, Herr AJ, Preston BD.SourceUniversity of Washington.
Genetics.Genetics.2013 Jan 10. [Epub ahead of print]
DNA polymerases (Pols) ε and δ perform the bulk of yeast leading- and lagging-strand DNA synthesis. Both Pols possess intrinsic proofreading exonucleases that edit errors during polymerization. Rare errors that elude proofreading are extended into duplex DNA and excised by the mismatch repair (M
Interrelationship between HIV-1 Fitness and Mutation Rate.
Dapp MJ, Heineman RH, Mansky LM.SourceInstitute for Molecular Virology, Academic Health Center, University of Minnesota, Minneapolis, MN 55455, USA; Center for Drug Design, Academic Health Center, University of Minnesota, Minneapolis, MN 55455, USA; Pharmacology Graduate Program, Medical School, University of Minnesota, Minneapolis, MN 55455, USA.
Journal of molecular biology.J Mol Biol.2013 Jan 9;425(1):41-53. doi: 10.1016/j.jmb.2012.10.009. Epub 2012 Oct 16.
Differences in replication fidelity, as well as mutator and antimutator strains, suggest that virus mutation rates are heritable and prone to natural selection. Human immunodeficiency virus type 1 (HIV-1) has many distinct advantages for the study of mutation rate optimization given the wealth of st
F igure 1. Locations of mutations in the bacteriophage T4 DNA polymerase gene that confer mutator and antimutator phenotypes. More comprehensive listings of N-terminal mutator mutations and C-terminal ...
An antimutator lowers mutation rate. An increased level of nuclease activity (editing function) and all other genetic repair mechanisms may act this way. Compounds that inactivate microsomal enzymes involved in conversion of ...