Description
This sequence change replaces isoleucine, which is neutral and non-polar, with threonine, which is neutral and polar, at codon 661 of the ATP8B1 protein (p.Ile661Thr). This variant is present in population databases (rs121909100, gnomAD 0.02%). This missense change has been observed in individuals with benign recurrent intrahepatic cholestasis and/or progressive familial intrahepatic cholestasis (PMID: 9500542, 9918928, 15239083, 20232290, 33666275, 34016879). ClinVar contains an entry for this variant (Variation ID: 7267). Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) performed at Invitae indicates that this missense variant is not expected to disrupt ATP8B1 protein function with a negative predictive value of 80%. Experimental studies have shown that this missense change affects ATP8B1 function (PMID: 19731236, 19918981). For these reasons, this variant has been classified as Pathogenic.
# | Sample | Method | Observation |
---|
Origin | Affected | Number tested | Tissue | Purpose | Method | Individuals | Allele frequency | Families | Co-occurrences |
---|
1 | germline | unknown | not provided | not provided | not provided | | not provided | not provided | not provided | not provided |