title: A novel truncation mutation in GJA1 associated with open angle glaucoma and microcornea in a large Chinese family.
abstract: OBJECTIVE
  To identify genetic defects in a large family with open angle glaucoma (OAG) and microcornea.
  
  
  METHODS
  Genomic DNA was prepared from leukocytes of 15 individuals from three generations of a Chinese family, including seven individuals with OAG and microcornea, one with microcornea alone, and seven healthy individuals. Whole exome sequencing was performed on genomic DNA of the proband. Candidate variants were obtained through multiple steps of bioinformatics analysis and validated by Sanger sequencing and segregation analysis.
  
  
  RESULTS
  Exome sequencing detected a candidate variant in GJA1, a novel truncation mutation (c.791_792delAA, p.K264Ifs*43). This mutation was present in all seven individuals with OAG and microcornea and the individual with microcornea alone, but not in the seven unaffected relatives in the family. It was not present in 1394 alleles from 505 unrelated controls without glaucoma and 192 normal controls. Extraocular signs were not observed in seven out of the eight individuals; only one was affected with dental enamel hypoplasia and syndactyly.
  
  
  CONCLUSIONS
  A novel truncation mutation in GJA1 is associated with OAG and microcornea in a Chinese family. This suggests that GJA1 should be included as a candidate gene for glaucoma.
authors.affiliation: State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou, China.
authors.forename: X
authors.initials: X
authors.lastname: Huang
authors.affiliation: State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou, China.
authors.forename: N
authors.initials: N
authors.lastname: Wang
authors.affiliation: State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou, China.
authors.forename: X
authors.initials: X
authors.lastname: Xiao
authors.affiliation: State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou, China.
authors.forename: S
authors.initials: S
authors.lastname: Li
authors.affiliation: State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou, China.
authors.forename: Q
authors.initials: Q
authors.lastname: Zhang
mesh_terms: D000328:Adult; D044466:Asian People / Q000235:genetics; D002648:Child; D002681:China / Q000453:epidemiology; D018031:Connexin 43 / Q000235:genetics*; D003315:Cornea / Q000002:abnormalities*; D004252:DNA Mutational Analysis; D005124:Eye Abnormalities / Q000235:genetics*; D005260:Female; D005902:Glaucoma, Open-Angle / Q000235:genetics*; D006801:Humans; D007429:Intraocular Pressure; D008297:Male; D009154:Mutation; D010375:Pedigree; D014792:Visual Acuity; D014794:Visual Fields; D055815:Young Adult
chemical_list: D018031:Connexin 43; C500216:GJA1 protein, human