High-resolution array-CGH in patients with oculocutaneous albinism identifies new deletions of the TYR, OCA2, and SLC45A2 genes and a complex rearrangement of the OCA2 gene.

Abstract:

:Oculocutaneous albinism (OCA) is caused by mutations in six different genes, and their molecular diagnosis encompasses the search for point mutations and intragenic rearrangements. Here, we used high-resolution array-comparative genome hybridization (CGH) to search for rearrangements across exons, introns and regulatory sequences of four OCA genes: TYR, OCA2, TYRP1, and SLC45A2. We identified a total of ten new deletions in TYR, OCA2, and SLC45A2. A complex rearrangement of OCA2 was found in two unrelated patients. Whole-genome sequencing showed deletion of a 184-kb fragment (identical to a deletion previously found in Polish patients), whereby a large portion of the deleted sequence was re-inserted after severe reshuffling into intron 1 of OCA2. The high-resolution array-CGH presented here is a powerful tool to detect gene rearrangements. Finally, we review all known deletions of the OCA1-4 genes reported so far in the literature and show that deletions or duplications account for 5.6% of all mutations identified in the OCA1-4 genes.

authors

Morice-Picard F,Lasseaux E,Cailley D,Gros A,Toutain J,Plaisant C,Simon D,François S,Gilbert-Dussardier B,Kaplan J,Rooryck C,Lacombe D,Arveiler B

doi

10.1111/pcmr.12173

subject

Has Abstract

pub_date

2014-01-01 00:00:00

pages

59-71

issue

1

eissn

1755-1471

issn

1755-148X

journal_volume

27

pub_type

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