KCNH2 Variant T443fsX Detail

We estimate the penetrance of LQTS for KCNH2 T443fsX is %. This variant was found in a total of 2 carriers in 2 papers or gnomAD (version 4), 2 had LQTS. T443fsX is not present in gnomAD. T443fsX has not been functionally characterized. This residue is located in a None region for LQT2.

In Silico Data

PROVEAN PolyPhen-2 BLAST-PSSM REVEL Penetrance Density (%)
None None None None
PROVEAN scores less than -2 are considered deleterious. REVEL scores higher than 0.5 or 0.75 are considered likely pathogenic (higher sensitivity with the former cutoff, higher specificity with the latter cutoff). A PolyPhen-2 score of 0.85 or greater is considered likely pathogenic. BLAST-PSSM reflects the evolutionary conservation of residue substitutions, more negative numbers indicate fewer observations of the specific substitution than is expected. Penetrance density is our previously published method to calculate the average LQTS probability density in a shell of residues surrounding a residue of interest (Kroncke et al. 2019).

Reported Carrier Data

PubMed ID Year Carriers Unaffected LQT2 Other Disease
26496715 2015 1 0 1
26496715 2015 1 0 1
LITERATURE, COHORT, AND GNOMAD: - 2 0 2 -
VARIANT FEATURES ALONE: - 10 NA NA -
Summary totals might not agree with the literature table because of duplicate patients, which were excluded from the total counts. We do not distinguish here between multiple missense codons. Missense variants are combined across degenerate codon substitutions since codon-level data were not consistently available for curation.