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(chrI - chrXVI,chrMito,2-micron)

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  VIII  IX  X  XI  XII  XIII
  XIV  XV  XVI  Mito
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About CYGD


MIPS Fungal Genomes

mips home MIPS-FUNGI-ADM      FTP
MSH2 DNA mismatch repair protein 
Entry:YOL090w
Alias:O0935
Classification:known protein | 5422 Entries | Evi | PUBMED
Feature Type:CDS
Features
   Blast-Simap    DNA VIEW    PROTEIN VIEW

Similarity:
Paralogs (22.6 %) ;  |  Homologs in   Hemiascomycota (92.9 %);  Basidiomycota (44.4 %);  Fungi (92.9 %);  Eukaryota (92.9 %);  Plants (38.9 %);  Mammalia (40.4 %);  Human (40.4 %);  Bacteria (28.9 %);  All except yeast (92.9 %)

  • similarity to human MSH2 and other DNA mismatch repair proteins
  • similarity to human hereditary non-polyposis colon cancer protein MSH2
Functional Classification:
  • CELL CYCLE AND DNA PROCESSING
    ..DNA processing
    ....DNA recombination and DNA repair
    ......DNA repair | 159 Entries | Evi | PUBMED
  • CELL CYCLE AND DNA PROCESSING
    ..DNA processing
    ....DNA recombination and DNA repair
    ......DNA recombination
    ........somatic / mitotic recombination | 21 Entries | Evi | PUBMED
  • PROTEIN WITH BINDING FUNCTION OR COFACTOR REQUIREMENT (structural or catalytic)
    ..nucleotide/nucleoside/nucleobase binding
    ....ATP binding | 191 Entries | Evi | PUBMED
  • CELL CYCLE AND DNA PROCESSING
    ..cell cycle
    ....mitotic cell cycle and cell cycle control
    ......cell cycle checkpoints (checkpoints of morphogenesis, DNA-damage,-replication, mitotic phase and spindle) | 67 Entries | Evi | PUBMED
Pathway:
  • mismatch repair | postmismatch recognition - responsible for inhibition of recombination when mismatches are still present | PUBMED
InterPro:
Localization:  MSH2 localization details
  • cytoplasm
  • nucleus
Remarks:
  • instability of trinucleotide repeats is not dependent on Msh2p, Msh3p, Pms1p or Rad52p function | PUBMED
  • Msh2p-Holliday junctions are more stable than Msh2p-duplex DNA complexes
  • stabilizing effect by variant repeats in microsatellite sequences is independent of pms1 msh2 and msh3 | PUBMED
  • a single mismatch is sufficient for inhibition of recombination, additional mismatches have a cumulative negative effect on recombination rate | PUBMED
  • when the flanking homologous regions that anneal are 205 bp, the requirement for Msh2/Msh3 is as great as for Rad1/Rad10; but when the annealing partners are 1,170 bp, Msh2/Msh3 have little effect, while Rad1/Rad10 are still required | PUBMED
  • the carboxy-terminal 114 aa are important for interaction with Msh6p
Phenotypes:  Disruption: MSH2 details
  • viable
___
  • mutants have greatly increased mutation rate to canavanine resistance
  • mutants are defective in repair of single base mismatches
  • mutants have high rate of 2- to 4- base pair insertions or deletions at dinucleotide repeats
  • mutant have 50-fold elevated spontaneous mutation rate
  • null mutant loses polarity of gene conversion usually found across the length of a gene
  • increased 1Bp deletions, preferential at homonucleotide runs
  • dramatically increased mutation rate in homonucleotide runs(1Bp deletions)
  • synergistic increase in +1 and -1 frameshifts in msh2 pol2-4 mutants (pol2 proofreading mutation)
  • destabilizes microsatellites with repeat units of 1 to 13 bp but has no effect on microsatellites 16 to 20 bp repeates
  • exo1 msh2 and rad2 msh2 double mutants are more sensitive to UV than the single mutations | PUBMED
  • msh2 deletion mutant shows a 290-fold increase in GT-tract instability | PUBMED
  • P640L conversion results in a complete loss of function in vivo | PUBMED
  • H658Y conversion retains full function of the protein in vivo | PUBMED
___
  • Nucleic acid metabolism defects
    ..DNA repair mutants
    ....other DNA repair mutants | 32 Entries
Click for larger Map
Physical Features
Coordinates:147382 - 150276 (W)
Length:2895 nt
Contig:chrXV
Exon Coordinates:147382 - 150276
GC Content:36.6 %
Protein Length:964 aa
Isoelectric Point:5.74
Molecular Weight:108885 Da
Retrieve Sequence: DNA /Protein
Literature | References
CYGD curated Lit.:PubMed
PubMed:Search abstracts
PubMed Central:Search full-text articles
Sequence References:
EMBL: Z74832
EMBL: M84170
PIR: S57379
UniProtKB: P25847
NCBI: NP_014551
Additional Links:
CYGD Tables:
  • The Yeast homologues of human disease-associated genes
  • LinkOut:
  • SGD - Saccharomyces Genome Database
  • YGOB - Yeast Gene Order Browser
  • yMGV - yeast Microarray Global Viewer

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