ClinVar

Description

The ALMS1 p.Gly4014Asp variant was not identified in the literature but was identified in dbSNP (ID: rs200462734) and ClinVar (uncertain significance by GeneDx and Invitae). The variant was identified in control databases in 60 of 281608 chromosomes at a frequency of 0.0002131 (Genome Aggregation Database March 6, 2019, v2.1.1). The variant was observed in the following populations: European (non-Finnish) in 50 of 128624 chromosomes (freq: 0.000389), Other in 2 of 7164 chromosomes (freq: 0.000279), African in 2 of 24396 chromosomes (freq: 0.000082), European (Finnish) in 2 of 25106 chromosomes (freq: 0.00008), South Asian in 2 of 30616 chromosomes (freq: 0.000065) and Latino in 2 of 35430 chromosomes (freq: 0.000056), but was not observed in the Ashkenazi Jewish or East Asian populations. The p.Gly4014 residue is not conserved in mammals and four out of five computational analyses (PolyPhen-2, SIFT, AlignGVGD, BLOSUM, MutationTaster) do not suggest a high likelihood of impact to the protein; however, this information is not predictive enough to rule out pathogenicity. The variant occurs outside of the splicing consensus sequence and in silico or computational prediction software programs (SpliceSiteFinder, MaxEntScan, NNSPLICE, GeneSplicer) do not predict a difference in splicing. In summary, based on the above information the clinical significance of this variant cannot be determined with certainty at this time. This variant is classified as a variant of uncertain significance.