Publication Date:
1989-07-07
Description:
The insulin receptor has an intrinsic tyrosine kinase activity that is essential for signal transduction. A mutant insulin receptor gene lacking almost the entire kinase domain has been identified in an individual with type A insulin resistance and acanthosis nigricans. Insulin binding to the erythrocytes or cultured fibroblasts from this individual was normal. However receptor autophosphorylation and tyrosine kinase activity toward an exogenous substrate were reduced in partially purified insulin receptors from the proband's lymphocytes that had been transformed by Epstein-Barr virus. The insulin resistance associated with this mutated gene was inherited by the proband from her mother as an apparently autosomal dominant trait. Thus a deletion in one allele of the insulin receptor gene may be at least partly responsible for some instances of insulin-resistant diabetes.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Taira, M -- Hashimoto, N -- Shimada, F -- Suzuki, Y -- Kanatsuka, A -- Nakamura, F -- Ebina, Y -- Tatibana, M -- Makino, H -- New York, N.Y. -- Science. 1989 Jul 7;245(4913):63-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Second Department of Internal Medicine, Chiba University School of Medicine, Inohana, Japan.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2544997" target="_blank"〉PubMed〈/a〉
Keywords:
Adolescent
;
Alleles
;
Amino Acid Sequence
;
Base Sequence
;
*Chromosome Deletion
;
Diabetes Mellitus, Type 1/enzymology/*genetics
;
Female
;
*Genes
;
Humans
;
Insulin Resistance
;
Male
;
Molecular Sequence Data
;
Mutation
;
Pedigree
;
Protein-Tyrosine Kinases/*genetics
;
Receptor, Insulin/*genetics
;
Restriction Mapping
Print ISSN:
0036-8075
Electronic ISSN:
1095-9203
Topics:
Biology
,
Chemistry and Pharmacology
,
Computer Science
,
Medicine
,
Natural Sciences in General
,
Physics
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