The RPGR gene nonsense mutation G-->T at open reading frame (ORF)15+1164 cosegregated with the disease and may create a donor splice site. Identification of an RPGR mutation in atrophic maculardegeneration expands the phenotypic range associated with this gene
Case#: Ayyagari_2002_Family_UM:F1088_Patient_III-16, male, 48 years old, ethnicity not descibed
CasePresentingHPOs: HP:0007401 (Macular atrophy), HP:0007663 (Reduced visual acuity), HP:0000529 (Progressive visual loss), HP:0007722 (Retinal pigment epithelial atrophy), HP:0003596 (Middle age onset), HP:0031624 (Moderate myopia), HP:0000603 (Central scotoma)
CaseHPOFreeText: Onset of symptoms was approximately at age 43. The proband has been diagnosed with atrophic macular degeneration, with the family exhibiting X-linked pattern of inheritance.
CaseNotHPOs: HP:0000580 (Pigmentary retinopathy), HP:0030491 (Choriocapillaris atrophy), HP:0008046 (Abnormal retinal vascular morphology), HP:0000512 (Abnormal electroretinogram)
CaseNotHPOFreeText: N/A
CasePreviousTesting: The proband and family members were subjected to linkage analysis using microsatellite markers along the length of the X chromosome (LOD score of 4.17 associated with marker DXS1058.
CaseMethod1: Sanger sequencing of the PCR-amplified exons from the NYX locus
CaseMethod2: Sanger sequencing of the PCR-amplified exons from the RPGR locus
CaseGenotypingMethod: The proband and his family members were subjected to linkage analysis using microsatellite markers along the length of the X chromosome, followed by Sanger sequencing of the PCR-amplified exons from the NYX and RPGR loci.
Variant: The proband harbors the NM_001034853.2(RPGR):c.2917G>T (p.Glu973Ter) variant in the hemizygous state.
ClinVar: 866129
gnomAD: The variant was not found in gnomAD v.2.1.1.
VariantEvidence: NM_001034853.2(RPGR):c.2917G>T (p.Glu973Ter) is a nonsense variant in the final exon (exon 15) that is not predicted to trigger nonsense-mediated decay but truncates ~16% of the C-terminus of the protein product.
CaseAddInfo: The proband is a member of Family UM:F1088, shown in Figure 1 from this study. Ten other genotype-positive affected males are present in his extended family, as well as carrier females affected with mild perimacular RPE depigmentation and tapetal reflex.
CasePMIDs: N/A