Is KIT p.Ser30Arg (c.90T>A) pathogenic?

KIT p.Ser30Arg (c.90T>A) is classified Uncertain significance in KIT (ClinVar, Multiple submitters, 2 submitters; last evaluated 2024-01-11). AlphaMissense: ambiguous (0.4141); Very rare (popmax 6.84e-05%); Associated with hereditary neoplastic syndrome.

What condition is associated with KIT p.Ser30Arg (c.90T>A)?

KIT p.Ser30Arg (c.90T>A) is associated with hereditary neoplastic syndrome, gastrointestinal stromal tumor (ClinVar).

How common is KIT p.Ser30Arg (c.90T>A) in the general population?

KIT p.Ser30Arg (c.90T>A) is very rare (popmax 6.84e-05%) (gnomAD).

What do computational predictors say about KIT p.Ser30Arg (c.90T>A)?

AlphaMissense predicts ambiguous (score 0.4141) — an in-silico prediction, not a clinical call.

KIT p.Ser30Arg

c.90T>A · rs2109660456 · VCV1435024

Uncertain significance Multiple submitters

Classification

Uncertain significance

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 2 submitters

AlphaMissense

ambiguous

0.4141 · ACMG-weighted

gnomAD v4.1

Rare

very rare (popmax 6.84e-05%)

Conditions

hereditary neoplastic syndrome

Computational evidence

Protein change
AlphaMissense	0.4141	ambiguous
REVEL	0.355	indeterminate
SaProt	LLR -7.15	tolerated
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 4.8	GERP 2.2, phastCons 1
Regional constraint	o/e 1.19	unconstrained · MANE · 38 kb · p 0.24 · regional, not allelic
Overall
CADD	22.3	PHRED · no single calibrated threshold — expert panels disagree

AlphaMissense carries the ACMG weight for missense; REVEL and SaProt are independent agreement signals.

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 6.84e-05%

Overall 6.84e-05% 1/1,461,868 alleles · very rare

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.Ser30Arg
Coding: c.90T>A
MANE Select: NM_000222
dbSNP: rs2109660456
Type: single nucleotide variant
Location: chr4:54695534 (GRCh38)
Gene constraint: LOEUF 0.24 · pLI 1.00 · ClinGen HI 3/3 (gnomAD)
Structure: AlphaFold pLDDT 78.52 · 65 PDB
Residue 30: the ig-like c2-type 1 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.Ser30Ile 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
KIT p.Lys642Glu Pathogenic ★★ same condition
KIT p.Trp557Arg Pathogenic/Likely pathogenic ★★ same condition
KIT p.Val559Ala 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-ser30arg (accessed [today's date]).

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