H492Q Summary

KCNH2 H492Q was found in 0 papers (see below) with a total of 0 carriers: 0 had LQT2. H492Q is not present in gnomAD. H492Q has been functionally characterized in 1 paper. This residue is located in a Hotspot region for LQT2.

In silico predictions, functional data (if available), and location in structure are equivalent to observing 5 individuals unaffected with LQT2 and 5 individuals affected with LQT2.

H492Q Reported Clinical Data

PMID Year Carriers Unaffected LQT2 Other disease
Summary totals might not agree with the literature table because of duplicate patients, which were excluded from the total counts.

H492Q Reported Functional Data: heterozygously collected

Steady state (S.S.) and peak tail current are relative % to wildtype (100% being no different from wildtype). V0.5 act/inact are the voltages at which half of the maximal current is reached during an activation and inactivation protocol, each is in units of mV and relative to wildtype. Recovery from inactivation (Rec. inact.) and deactivation time (Deactivation) are the ratio of characteristic time constants with wildtype (unitless).

PMID Year Cell type S.S. peak current (%WT) Peak tail current (%WT) V0.5 act V0.5 inact Rec. inact. (%WT) Deactivation (%WT)
22517356 2012 Xeno

H492Q Reported Functional Data: homozygously collected

PMID Year Cell type S.S. peak current (%WT) Peak tail current (%WT) V0.5 act V0.5 inact Rec. inact. (%WT) Deactivation (%WT)
22517356 2012 Xeno 25 -7.00

H492Q Predictions

PROVEAN scores less than -2 are considered deleterious. REVEL scores higher than 0.5 or 0.75 is 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. PAM scores reflect the chemistry difference between WT and variant amino acid (more negative being greater difference between the two). BLAST-PSSM reflects the evolutionary conservation of residue substitutions, more negative numbers indicate fewer observations of the specific substitution than is expected.

PAM Score REVEL Score PROVEAN Score Polyphen2 Score BLAST-PSSM
1 0.802 -7.297 0.997 0

H492Q has 38 neighbors (found in individuals) within 15 ångströms

A residue within a folded protein on average has nearest neighbors that fall roughly into two shells: a "nearest" neighbor around 5-6 angstroms and a second shell around 11 angstroms. NOTE: some residues appear multiple times at different distances. This results from the fact that the functional Kv11.1 channel is a homotetramer and occasionally the same residue from multiple subunits is present within the 15A window. All variants shown in the rightmost column have been observed in at least one individual in the literature or gnomAD.

ResidueNumber Distance(Å) Variants
4 14.7
402 13.3 H402R
467 13.7
469 14.5
470 10.3 N470D
471 10.2 F471X
472 14 R472C R472X
473 10.9 T473P
474 10.5 T474I
475 6 Y475C Y475Del
476 9.5 V476I
477 8.2
478 11.2 A478D
479 12.7
480 11.3 E480V
481 13.2
482 12.7 V482A
483 9.5 V483I
484 11.8
485 13.8 H485X
486 11.8
487 10.4 G487R G487S
488 9.9 R488C R488H
489 6.4 I489F I489I
490 6.7 A490P A490T
491 5.6 V491I
493 6.4 Y493C Y493F Y493H Y493Ins
494 7.8 F494Del
495 8.1 K495X
496 7.2
497 9.2 W497L W497X
498 10.4
499 12.7
500 14.1 I500Del
501 13.2 D501H D501N D501Y
534 14.8 R534C
537 11.2 R537W
538 14.1