Is KIT p.His264= (c.792C>T) pathogenic?

KIT p.His264= (c.792C>T) is classified Benign/Likely benign in KIT (ClinVar, Multiple submitters, 3 submitters; last evaluated 2026-06-02). Very rare (popmax 0.00833%, amr); Associated with hereditary neoplastic syndrome.

What condition is associated with KIT p.His264= (c.792C>T)?

KIT p.His264= (c.792C>T) is associated with hereditary neoplastic syndrome, gastrointestinal stromal tumor (ClinVar).

How common is KIT p.His264= (c.792C>T) in the general population?

KIT p.His264= (c.792C>T) is very rare (popmax 0.00833%, amr) (gnomAD).

KIT p.His264=

c.792C>T · rs753102574 · VCV528661

Benign/Likely benign Multiple submitters

Classification

Benign/Likely benign

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 3 submitters

gnomAD v4.1

Rare

very rare (popmax 0.00833%, amr)

Conditions

hereditary neoplastic syndrome

Computational evidence

Protein change
Missense predictors do not apply to this variant type; conservation carries the signal.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 0.12	GERP -2.9, phastCons 0.001
Overall
CADD	9.384	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.00833% Admixed American · 5/59,990 alleles

Filtering AF 0.00323% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.00207%

Overall 0.00186% 30/1,613,602 alleles · very rare

Ancestry group	Frequency	1 in
Admixed Americangrpmax	0.00833%	11,998
Remaining individualsnot grpmax-eligible	0.0048%	20,823
European (non-Finnish)	0.0017%	58,987
African / African-American	0.00134%	74,870
South Asian	0.0011%	91,060

Rarity supports pathogenicity (ACMG PM2); frequency above a disease-specific BA1/BS1 threshold argues against it. A variant frequent in one ancestry group can be near-absent in others, so a single global figure can mislead.

Variant & gene context

Gene: KIT
Protein: p.His264=
Coding: c.792C>T
MANE Select: NM_000222
dbSNP: rs753102574
Type: single nucleotide variant
Location: chr4:54703759 (GRCh38)
Gene constraint: LOEUF 0.24 · pLI 1.00 · ClinGen HI 3/3 (gnomAD)
Structure: AlphaFold pLDDT 78.52 · 65 PDB
Residue 264: a disulfide bond; the ig-like c2-type 3 domain

Full KIT gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

hereditary neoplastic syndrome — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Also linked: gastrointestinal stromal tumor

Similar variants

KIT p.His264Tyr Uncertain significance ★★ ⚠ same residue
KIT p.His264Arg Conflicting classifications of pathogenicity ★ ⚠ same residue
KIT p.His264Gln Conflicting classifications of pathogenicity ★ ⚠ same residue
KIT p.His264Leu Uncertain significance ★ ⚠ same residue
KIT p.Ala621Thr Pathogenic/Likely pathogenic ★★ same condition
KIT p.Asp820Tyr Pathogenic ★★ same condition
KIT p.Gln190Ter Pathogenic ★★ same condition
KIT p.Leu576Pro Pathogenic/Likely pathogenic ★★ same condition

Built on 18 open, versioned datasets — ClinVar, gnomAD, AlphaMissense, REVEL, ClinGen & more — plus Sugi Variant's own cross-source analysis. Source data 2026-01–2026-10, ClinVar 2026-10. Full sources & versions →

Cite Sugi Variant

Gür T. Sugi Variant: A Deterministic Per-Variant Germline Reference from a Knowledge Graph for Humans and AI Agents. 2026. doi:10.5281/zenodo.21509445. This variant: https://sugi.bio/variant/kit-p-his264 (accessed [today's date]).

Preprint & method: sugi.bio/variant/method Machine-readable: this page as Markdown