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Nat Genet. 1995 Mar;9(3):293-8.

The minisatellite in the diabetes susceptibility locus IDDM2 regulates insulin transcription.

Author information

1
Hormone Research Institute, University of California, San Francisco 94143-0534, USA.

Abstract

Genetic susceptibility to insulin-dependent diabetes mellitus (IDDM) is inherited as a polygenic trait. One of the loci implicated in IDDM is a polymorphic minisatellite 5' of the human insulin (INS) gene on chromosome 11. This insulin-linked polymorphic region (ILPR) is composed of tandemly repeated sequences, which fall into three size classes: IDDM is strongly associated with short ILPR alleles. We now show that the ILPR is capable of transducing a transcriptional signal in pancreatic beta-cells, with a long ILPR possessing greater activity than a short ILPR. The ILPR contains numerous high-affinity binding sites for the transcription factor Pur-1, and transcriptional activation by Pur-1 is modulated by naturally occurring sequences in the ILPR. Our results demonstrate a possible function for this unique minisatellite, which may have implications for type 1 diabetes.

PMID:
7773292
DOI:
10.1038/ng0395-293
[Indexed for MEDLINE]

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