PSKH1

Chr 16AR

protein serine kinase H1

Also known as: PFIC13

NCBI Gene: 5681 ENSG00000159792 UniProt: P11801

Enables protein serine/threonine kinase activity. Predicted to be involved in chromatin remodeling. Predicted to act upstream of or within determination of left/right symmetry; heart development; and protein phosphorylation. Located in several cellular components, including cilium; cytosol; and nuclear speck. [provided by Alliance of Genome Resources, Apr 2025]

Primary Disease Associations & Inheritance

Cholestasis, progressive familial intrahepatic, 13MIM #620962

Active trials

Pathogenic / LP

ClinVar variants

Pubs (1 yr)

2.3

Missense Z

0.65

LOEUF

Clinical Summary— PSKH1

⚡

Population Constraint (gnomAD)

Constrained for loss-of-function variants (OE-LoF 0.25) despite low pLI — interpret in context.

📋

ClinVar Variants

27 Pathogenic / Likely Pathogenic· 62 VUS of 91 total submissions

Population Genetics & Constraint

gnomAD v4 — loss-of-function & missense intolerance

gnomAD

Tolerant — LoF & missense variants common in population

LoF Constraint?LOEUF (Loss-of-function Observed/Expected Upper bound Fraction) is the upper bound of the 90% CI for LoF OE — the preferred gnomAD v4 metric. Lower = more intolerant to LoF. LOEUF < 0.35 = highly constrained.

0.65LOEUF

pLI 0.260

Z-score 2.41

OE 0.25 (0.11–0.65)

Tolerant

Typical tolerance to LoF variation

Missense Constraint?Missense Z-score: standard deviations fewer missense variants observed vs. expected. Z > 3.09 (p < 0.001) = gene does not tolerate missense variation. OE missense < 0.6 is also considered constrained.

2.28Z-score

OE missense 0.63 (0.56–0.71)

188 obs / 298.9 exp

Mild constraint

Moderately missense-constrained (top ~2.5%)

Observed / Expected Ratios?Shaded band = 90% confidence interval. Vertical tick = point estimate. Grey threshold line = gnomAD constraint cutoff for that variant class.

LoF OE?Ratio of observed to expected LoF variants. Upper CI bound (LOEUF) ≤ 0.35 = strong LoF constraint signal.0.25 (0.11–0.65)

0≤0.351.4

Missense OE?Ratio of observed to expected missense variants. OE ≤ 0.6 = fewer missense variants than expected by chance.0.63 (0.56–0.71)

0≤0.61.4

Synonymous OE?Control metric — synonymous variants are largely neutral and expected near OE = 1.0. Significant deviation may indicate annotation issues.0.97

0≤1.21.6

LoF obs/exp: 3 / 12.0Missense obs/exp: 188 / 298.9Syn Z: 0.21

0.6840th %ile

GOF

0.78top 25%

LOF

0.3746th %ile

This gene has evidence for multiple mechanisms of pathogenicity (gain-of-function and dominant-negative). Both the Badonyi & Marsh prediction and the broader genomic evidence point to gain-of-function as the predominant mechanism. Different variants in this gene may act through different mechanisms — interpret in context of the specific variant.

GOFprediction above median

DNprediction above median

Note: In-silico variant effect predictors (SIFT, PolyPhen, REVEL, CADD) may underestimate pathogenicity of missense variants in genes with GOF or DN mechanisms. Consider functional evidence and clinical context.

Predictions from Badonyi M, Marsh JA. PLoS ONE. 2024;19(8):e0307312.