Ataxia-telangiectasia: founder effect among north African Jews.

Abstract:

:The ATM gene is responsible for the autosomal recessive disorder ataxia-telangiectasia (A-T), characterized by cerebellar degeneration, immunodeficiency and cancer predisposition. A-T carriers were reported to be moderately cancer-prone. A wide variety of A-T mutations, most of which are unique to single families, were identified in various ethnic groups, precluding carrier screening with mutation-specific assays. However, a single mutation was observed in 32/33 defective ATM alleles in Jewish A-T families of North African origin, coming from various regions of Morocco and Tunisia. This mutation, 103C-->T, results in a stop codon at position 35 of the ATM protein. In keeping with the nature of this mutation, various antibodies directed against the ATM protein failed to defect this protein in patient cells. A rapid carrier detection assay detected this mutation in three out of 488 ATM alleles of Jewish Moroccan or Tunisian origin. This founder effect provides a unique opportunity for population-based screening for A-T carriers in a large Jewish community.

journal_name

Hum Mol Genet

journal_title

Human molecular genetics

authors

Gilad S,Bar-Shira A,Harnik R,Shkedy D,Ziv Y,Khosravi R,Brown K,Vanagaite L,Xu G,Frydman M,Lavin MF,Hill D,Tagle DA,Shiloh Y

doi

10.1093/hmg/5.12.2033

subject

Has Abstract

pub_date

1996-12-01 00:00:00

pages

2033-7

issue

12

eissn

0964-6906

issn

1460-2083

pii

6d0163

journal_volume

5

pub_type

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