PMID- 10206679 OWN - NLM STAT- MEDLINE DCOM- 19990412 LR - 20131121 IS - 1059-7794 (Print) IS - 1059-7794 (Linking) VI - 11 IP - 5 DP - 1998 TI - Novel allele of the insulin receptor substrate-1 bearing two non-conservative amino acid substitutions in a patient with noninsulin-dependent diabetes mellitus. Mutations in brief no. 130. Online. PG - 411 AB - We analyzed by SSCP the complete IRS-1 coding sequence in NIDDM patient #25 D. Unique conformers corresponding to a Ser to Tyr substitution at codon 1043 (S1043Y), and to a Cys to Tyr substitution at codon 1095 (C1095Y) were detected in this patient. The results of sequential digestion with restriction enzymes indicated that the novel sequence variants segregate on the same allele. Relatives of patient #25 D were not available for study, to confirm segregation of the novel allele with NIDDM in the family. Several lines of evidence suggest that the non-conservative amino acid substitutions detected in NIDDM patient #25 D have the potential to affect IRS-1 functions and could play a pathogenic role in this patient. Both S1043Y and C1095Y occur in a highly conserved sequence from human skeletal muscle, human hepatoma, mouse, and rat IRS-1. Protein subsequence analysis revealed that the S1043Y substitution abolishes a consensus sequence for glycogen synthase kinase 3 phosphorylation. Furthermore, S1043Y and C1095Y are not common IRS-1 polymorphisms as they were detected only in 1/136 choromosomes from NIDDM patients (allele frequency in NIDDM patients = 0.0007) and in 0/120 chromosomes from control subjects. FAU - Mammarella, S AU - Mammarella S AD - Istituto di Patologia Umana e Medicina Sociale, Universita "Gabriele D'Annunzio" Via dei Vestini 1, 66013 Chieti, Italy. FAU - Creati, B AU - Creati B FAU - Esposito, D L AU - Esposito DL FAU - Arcuri, P AU - Arcuri P FAU - Della Loggia, F AU - Della Loggia F FAU - Capani, F AU - Capani F FAU - Mariani-Costantini, R AU - Mariani-Costantini R FAU - Caramia, F G AU - Caramia FG FAU - Battista, P AU - Battista P FAU - Cama, A AU - Cama A LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - United States TA - Hum Mutat JT - Human mutation JID - 9215429 RN - 0 (IRS1 protein, human) RN - 0 (Insulin Receptor Substrate Proteins) RN - 0 (Irs1 protein, mouse) RN - 0 (Irs1 protein, rat) RN - 0 (Phosphoproteins) RN - 42HK56048U (Tyrosine) RN - 452VLY9402 (Serine) RN - EC 2.7.10.1 (Receptor, Insulin) SB - IM MH - *Alleles MH - Amino Acid Substitution/*genetics MH - Diabetes Mellitus, Type 2/*genetics MH - Humans MH - Insulin Receptor Substrate Proteins MH - *Phosphoproteins MH - Receptor, Insulin/*genetics MH - Serine/genetics MH - Tyrosine/genetics EDAT- 1999/04/17 02:16 MHDA- 2000/06/22 10:00 CRDT- 1999/04/17 02:16 PHST- 1999/04/17 02:16 [pubmed] PHST- 2000/06/22 10:00 [medline] PHST- 1999/04/17 02:16 [entrez] AID - 10.1002/(SICI)1098-1004(1998)11:5<411::AID-HUMU11>3.0.CO;2-2 [pii] AID - 10.1002/(SICI)1098-1004(1998)11:5<411::AID-HUMU11>3.0.CO;2-2 [doi] PST - ppublish SO - Hum Mutat. 1998;11(5):411. doi: 10.1002/(SICI)1098-1004(1998)11:5<411::AID-HUMU11>3.0.CO;2-2.