PMID- 9488480 OWN - NLM STAT- MEDLINE DCOM- 19980319 LR - 20240213 IS - 0270-7306 (Print) IS - 1098-5549 (Electronic) IS - 0270-7306 (Linking) VI - 18 IP - 3 DP - 1998 Mar TI - A naturally occurring hPMS2 mutation can confer a dominant negative mutator phenotype. PG - 1635-41 AB - Defects in mismatch repair (MMR) genes result in a mutator phenotype by inducing microsatellite instability (MI), a characteristic of hereditary nonpolyposis colorectal cancers (HNPCC) and a subset of sporadic colon tumors. Present models describing the mechanism by which germ line mutations in MMR genes predispose kindreds to HNPCC suggest a "two-hit" inactivation of both alleles of a particular MMR gene. Here we present experimental evidence that a nonsense mutation at codon 134 of the hPMS2 gene is sufficient to reduce MMR and induce MI in cells containing a wild-type hPMS2 allele. These results have significant implications for understanding the relationship between mutagenesis and carcinogenesis and the ability to generate mammalian cells with mutator phenotypes. FAU - Nicolaides, N C AU - Nicolaides NC AD - Johns Hopkins Oncology Center, Baltimore, Maryland 21231, USA. nnicolaides.@magainin.com FAU - Littman, S J AU - Littman SJ FAU - Modrich, P AU - Modrich P FAU - Kinzler, K W AU - Kinzler KW FAU - Vogelstein, B AU - Vogelstein B LA - eng GR - P50 CA062924/CA/NCI NIH HHS/United States GR - CA62924/CA/NCI NIH HHS/United States GR - CA71544/CA/NCI NIH HHS/United States GR - CA35494/CA/NCI NIH HHS/United States GR - R01 GM045190/GM/NIGMS NIH HHS/United States PT - Journal Article PT - Research Support, Non-U.S. Gov't PT - Research Support, U.S. Gov't, P.H.S. PL - United States TA - Mol Cell Biol JT - Molecular and cellular biology JID - 8109087 RN - 0 (Bacterial Proteins) RN - 0 (DNA-Binding Proteins) RN - 0 (Escherichia coli Proteins) RN - 0 (MSH3 protein, human) RN - 0 (Multidrug Resistance-Associated Proteins) RN - 0 (MutL protein, E coli) RN - 0 (MutS Homolog 3 Protein) RN - 0 (Neoplasm Proteins) RN - 0 (Nucleic Acid Heteroduplexes) RN - EC 3.6.1.- (Adenosine Triphosphatases) RN - EC 3.6.1.- (PMS2 protein, human) RN - EC 3.6.1.3 (Mismatch Repair Endonuclease PMS2) RN - EC 3.6.1.3 (MutL Proteins) RN - EC 6.5.1.- (DNA Repair Enzymes) RN - Y49M64GZ4Q (multidrug resistance-associated protein 1) SB - IM MH - *Adenosine Triphosphatases MH - Animals MH - Bacterial Proteins/metabolism MH - Cell Line MH - Cricetinae MH - *DNA Repair MH - *DNA Repair Enzymes MH - DNA-Binding Proteins/metabolism MH - *Escherichia coli Proteins MH - HeLa Cells MH - Humans MH - Mesocricetus MH - Mismatch Repair Endonuclease PMS2 MH - *Multidrug Resistance-Associated Proteins MH - MutL Proteins MH - MutS Homolog 3 Protein MH - *Mutation MH - Neoplasm Proteins/biosynthesis/*genetics/metabolism MH - Nucleic Acid Heteroduplexes MH - Phenotype PMC - PMC108878 EDAT- 1998/03/06 00:00 MHDA- 1998/03/06 00:01 PMCR- 1998/03/01 CRDT- 1998/03/06 00:00 PHST- 1998/03/06 00:00 [pubmed] PHST- 1998/03/06 00:01 [medline] PHST- 1998/03/06 00:00 [entrez] PHST- 1998/03/01 00:00 [pmc-release] AID - 1144 [pii] AID - 10.1128/MCB.18.3.1635 [doi] PST - ppublish SO - Mol Cell Biol. 1998 Mar;18(3):1635-41. doi: 10.1128/MCB.18.3.1635.