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A novel GUCY2D mutation, V933A, causes central areolar choroidal dystrophy
Anne E Hughes1, Weihua Meng, Andrew J Lotery
1Centre for Public Health, School of Medicine, Dentistry and Biomedical Sciences, Queen’s University Belfast, Royal Victoria Hospital, Belfast, UK. a.hughes@qub.ac.uk
Investigative Ophthalmology & Visual Science
|June 15, 2012
Summary
Researchers identified a novel guanylate cyclase 2D, membrane (retina-specific) gene (GUCY2D) mutation causing central areolar choroidal dystrophy (CACD). This finding advances understanding of genotype-phenotype correlations in inherited retinal diseases.
Area of Science:
- Genetics
- Ophthalmology
- Molecular Biology
Background:
- Central areolar choroidal dystrophy (CACD) is an inherited retinal disease with an unknown genetic cause in many families.
- Previous studies linked the CACD locus in a large Northern Irish family to chromosome 17p13.
Purpose of the Study:
- To determine the specific genetic mutation responsible for CACD in a large Northern Irish family.
- To investigate the molecular basis of this inherited retinal disorder.
Main Methods:
- Utilized sequence capture and massively parallel sequencing to identify mutations.
- Performed computational alignment, base-calling, and annotation to analyze sequencing data.
- Employed conventional sequencing to confirm the identified mutation.
Main Results:
- A novel single-base substitution in the guanylate cyclase 2D, membrane (retina-specific) gene (GUCY2D) was identified.
- The mutation segregated with the CACD phenotype in the family.
- The identified mutation (p.Val933Ala) is located in the catalytic domain and predicted to impair protein function.
Conclusions:
- This study reports the first instance of a GUCY2D mutation causing CACD.
- The findings expand the known spectrum of GUCY2D-associated retinal dystrophies.
- This discovery contributes to a better understanding of genotype-phenotype correlations in heterogeneous choroidoretinal dystrophies.
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