ClinVar

Description

The RAI1 p.His172Gln variant was not identified in the literature but was identified in dbSNP (ID: rs147481626), LOVD 3.0 and ClinVar (classified as likely benign by GeneDx and as uncertain significance by Ambry Genetics). The variant was identified in control databases in 38 of 282302 chromosomes at a frequency of 0.0001346 (Genome Aggregation Database March 6, 2019, v2.1.1). The variant was observed in the following populations: African in 33 of 24908 chromosomes (freq: 0.001325), Latino in 3 of 35416 chromosomes (freq: 0.000085) and European (non-Finnish) in 2 of 128750 chromosomes (freq: 0.000016), but was not observed in the Ashkenazi Jewish, East Asian, European (Finnish), Other, and South Asian populations. The p.His172 residue is conserved in mammals and computational analyses (PolyPhen-2, SIFT, AlignGVGD, BLOSUM, MutationTaster) provide inconsistent predictions regarding the impact to the protein; this information is not very predictive of 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 although we would lean towards a more benign role for this variant. This variant is classified as likely benign.