High myopia caused by a mutation in LEPREL1, encoding prolyl 3-hydroxylase 2.
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Mordechai S, Gradstein L, Pasanen A, Ofir R, El Amour K, Levy J, Belfair N, Lifshitz T, Joshua S, Narkis G, Elbedour K, Myllyharju J, Birk OS
High myopia caused by a mutation in LEPREL1, encoding prolyl 3-hydroxylase 2.
Am J Hum Genet. 2011 Sep 9;89(3):438-45. doi: 10.1016/j.ajhg.2011.08.003. Epub 2011 Sep 1.
- PubMed ID
- 21885030 [ View in PubMed]
- Abstract
Autosomal-recessive high-grade axial myopia was diagnosed in Bedouin Israeli consanguineous kindred. Some affected individuals also had variable expressivity of early-onset cataracts, peripheral vitreo-retinal degeneration, and secondary sight loss due to severe retinal detachments. Through genome-wide linkage analysis, the disease-associated gene was mapped to approximately 1.7 Mb on chromosome 3q28 (the maximum LOD score was 11.5 at theta = 0 for marker D3S1314). Sequencing of the entire coding regions and intron-exon boundaries of the six genes within the defined locus identified a single mutation (c.1523G>T) in exon 10 of LEPREL1, encoding prolyl 3-hydroxylase 2 (P3H2), a 2-oxoglutarate-dependent dioxygenase that hydroxylates collagens. The mutation affects a glycine that is conserved within P3H isozymes. Analysis of wild-type and p.Gly508Val (c.1523G>T) mutant recombinant P3H2 polypeptides expressed in insect cells showed that the mutation led to complete inactivation of P3H2.