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Variant: NM_000350.3(ABCA4):c.4924_4927del (p.Ser1642fs)

CA957427

3381789 (ClinVar)

Gene: ABCA4 (HGNC:24)
Condition: ABCA4-related retinopathy (MONDO:0800406)
Inheritance Mode: Autosomal recessive inheritance
UUID: 95b7c9f0-e2a6-4a34-b997-76310e19e4fa
Approved on: 2025-12-05
Published on: 2025-12-19

HGVS expressions

NM_000350.3:c.4924_4927del
NM_000350.3(ABCA4):c.4924_4927del (p.Ser1642fs)
NC_000001.11:g.94021334_94021337del
CM000663.2:g.94021334_94021337del
NC_000001.10:g.94486890_94486893del
CM000663.1:g.94486890_94486893del
NC_000001.9:g.94259478_94259481del
NG_009073.1:g.104816_104819del
ENST00000370225.4:c.4924_4927del
ENST00000370225.3:c.4924_4927del
ENST00000460514.1:n.418_421del
ENST00000470771.1:n.34_37del
ENST00000536513.5:c.1300_1303del
NM_000350.2:c.4924_4927del
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Pathogenic

Met criteria codes 4
PM3_Supporting PVS1 PM2_Supporting PP1_Moderate
Not Met criteria codes 1
PS4

Evidence Links 0

Expert Panel

Criteria Specification Information

Criteria Specification: ClinGen ABCA4 Expert Panel Specifications to the ACMG/AMP Variant Interpretation Guidelines for ABCA4 Version 1.0.0

Criteria Specification Approval History
Criteria Specifications for this VCEP
Evidence submitted by expert panel
ABCA4 VCEP
The NM_000350.3:c.4924_4927del (p.Ser1642fs) variant in ABCA4 is a frameshift variant predicted to cause a premature stop codon in biologically relevant exon 35/50 leading to nonsense mediated decay in a gene in which loss-of-function is an established disease mechanism (PVS1). The total minor allele frequency in gnomAD v4.1.0 is 0.000001239 (2/1614206 alleles), which is lower than the ClinGen ABCA4 VCEP’s threshold for PM2_Supporting (<0.0001). The prevalence of the variant in affected individuals is not significantly increased compared with the prevalence in controls with an OR of infinity and the CI is 0.31-infinity, which is above the ABCA4 VCEP threshold of ≥5, but the CI does contain 1 (PMID: 35120629). This variant has been detected in at least 1 individual with ABCA4-related retinopathy who was homozygous for the variant (PM3_Supporting; ClinVar SCV: SCV005415477.1). The variant has been reported to segregate with ABCA4-related retinopathy in the proband and 2 similarly affected relatives (PP1_Moderate; ClinVar SCV: SCV005415477.1). In summary, this variant meets the criteria to be classified as pathogenic for ABCA4-related retinopathy based on the ACMG/AMP criteria applied, as specified by the ClinGen ABCA4 VCEP (Specification Version 1.0): PVS1, PM3_Supporting, PM2_Supporting, PP1_Moderate.
Met criteria codes
PM3_Supporting
This variant has been detected in at least 1 individual with ABCA4-related retinopathy. This individual was homozygous for the variant (0.5 points; PM3_Supporting; ClinVar SCV: SCV005415477.1).
PVS1
This is a frameshift variant located in exon 35 out of 50, and introduces a premature stop codon between codons 1-2255 (PVS1).
PM2_Supporting
The total minor allele frequency in gnomAD v4.1.0 is 0.000001239 (2/1614206 alleles), which is lower than the ClinGen ABCA4 VCEP’s threshold for PM2_Supporting (<0.0001), meeting this criterion (PM2_Supporting).
PP1_Moderate
The variant has been reported to segregate with ABCA4-related retinopathy in the proband and 2 similarly affected relatives (PP1_Moderate; ClinVar SCV: SCV005415477.1).
Not Met criteria codes
PS4
The prevalence of the variant in affected individuals is not significantly increased compared with the prevalence in controls. The OR is infinity and the CI is 0.31-infinity, which is above the ABCA4 VCEP threshold of ≥5, but the CI does contain 1 (PMID: 35120629).
Curation History
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