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• W4383710832 abstract "MutL family proteins contain an N-terminal ATPase domain (NTD), an unstructured interdomain linker, and a C-terminal domain (CTD), which mediates constitutive dimerization between subunits and often contains an endonuclease active site. Most MutL homologs direct strand-specific DNA mismatch repair by cleaving the error-containing daughter DNA strand. The strand cleavage reaction is poorly understood; however, the structure of the endonuclease active site is consistent with a two- or three-metal ion cleavage mechanism. A motif required for this endonuclease activity is present in the unstructured linker of Mlh1 and is conserved in all eukaryotic Mlh1 proteins, except those from metamonads, which also lack the almost absolutely conserved Mlh1 C-terminal phenylalanine-glutamate-arginine-cysteine (FERC) sequence. We hypothesize that the cysteine in the FERC sequence is autoinhibitory, as it sequesters the active site. We further hypothesize that the evolutionary co-occurrence of the conserved linker motif with the FERC sequence indicates a functional interaction, possibly by linker motif-mediated displacement of the inhibitory cysteine. This role is consistent with available data for interactions between the linker motif with DNA and the CTDs in the vicinity of the active site." @default.
• W4383710832 created "2023-07-11" @default.
• W4383710832 creator A5028696052 @default.
• W4383710832 creator A5081915207 @default.
• W4383710832 date "2023-07-09" @default.
• W4383710832 modified "2023-10-17" @default.
• W4383710832 title "Insights into DNA cleavage by MutL homologs from analysis of conserved motifs in eukaryotic Mlh1" @default.
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• W4383710832 doi "https://doi.org/10.1002/bies.202300031" @default.
• W4383710832 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/37424007" @default.
• W4383710832 hasPublicationYear "2023" @default.
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