UMMS Affiliation
Department of Biochemistry and Molecular Pharmacology
Publication Date
1998-03-21
Document Type
Article
Subjects
*Adenosine Triphosphatases; Bacterial Proteins; Base Sequence; DNA; DNA Repair; *DNA-Binding Proteins; Endodeoxyribonucleases; Escherichia coli; *Escherichia coli Proteins; Molecular Sequence Data; MutS DNA Mismatch-Binding Protein; Mutation; Nucleic Acid Heteroduplexes; Protein Binding; Protein Conformation
Disciplines
Biochemistry, Biophysics, and Structural Biology | Pharmacology, Toxicology and Environmental Health
Abstract
Vsr DNA mismatch endonuclease is the key enzyme of very short patch (VSP) DNA mismatch repair and nicks the T-containing strand at the site of a T-G mismatch in a sequence-dependent manner. MutS is part of the mutHLS repair system and binds to diverse mismatches in DNA. The function of the mutL gene product is currently unclear but mutations in the gene abolish mutHLS -dependent repair. The absence of MutL severely reduces VSP repair but does not abolish it. Purified MutL appears to act catalytically to bind Vsr to its substrate; one-hundredth of an equivalent of MutL is sufficient to bring about a significant effect. MutL enhances binding of MutS to its substrate 6-fold but does so in a stoichiometric manner. Mutational studies indicate that the MutL interaction region lies within the N-terminal 330 amino acids and that the MutL multimerization region is at the C-terminal end. MutL mutant monomeric forms can stimulate MutS binding.
Source
Nucleic Acids Res. 1998 Feb 15;26(4):948-53. Link to article on publisher's website
Journal/Book/Conference Title
Nucleic acids research
Related Resources
PubMed ID
9461452
Repository Citation
Drotschmann, Karin; Aronshtam, Alexander; Fritz, Hans-Joachim; and Marinus, Martin G., "The Escherichia coli MutL protein stimulates binding of Vsr and MutS to heteroduplex DNA" (1998). Biochemistry and Molecular Pharmacology Publications and Presentations. 46.
https://escholarship.umassmed.edu/bmp_pp/46
Included in
Biochemistry, Biophysics, and Structural Biology Commons, Pharmacology, Toxicology and Environmental Health Commons