Is ABCC8 p.His103Arg (c.308A>G) pathogenic?

ABCC8 p.His103Arg (c.308A>G) is classified Uncertain significance in ABCC8 (ClinVar, Single submitter, 1 submitter; last evaluated 2026-04-06). AlphaMissense: ambiguous (0.341); Absent from gnomAD v4.1; Associated with Inborn genetic diseases.

What condition is associated with ABCC8 p.His103Arg (c.308A>G)?

ABCC8 p.His103Arg (c.308A>G) is associated with Inborn genetic diseases (ClinVar).

How common is ABCC8 p.His103Arg (c.308A>G) in the general population?

ABCC8 p.His103Arg (c.308A>G) is absent from gnomAD v4.1 (gnomAD).

What do computational predictors say about ABCC8 p.His103Arg (c.308A>G)?

AlphaMissense predicts ambiguous (score 0.341) — an in-silico prediction, not a clinical call.

ABCC8 p.His103Arg

c.308A>G · VCV4859918

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

ambiguous

0.341 · ACMG-weighted

gnomAD v4.1

Absent

absent from gnomAD v4.1

Missense predictors

1/2 damaging

REVEL, SaProt · AlphaMissense no call

Conditions

Inborn genetic diseases

Computational evidence

Protein change
AlphaMissense	0.341	ambiguous
REVEL	0.764	pathogenic-leaning
SaProt	LLR -3.14	tolerated
⇒ REVEL calls this damaging; SaProt does not; AlphaMissense makes no call.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 6.2	GERP 2.5, phastCons 1
Regional constraint	o/e 0.84	unconstrained · MANE · 84 kb · p 1.4e-12 · regional, not allelic
Overall
CADD	22.9	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

Absent from gnomAD v4.1. Not observed in any sequenced alleles — a rarity signal (ACMG PM2-supporting), not evidence of pathogenicity on its own.

Variant & gene context

Gene: ABCC8
Protein: p.His103Arg
Coding: c.308A>G
MANE Select: NM_000352
Type: single nucleotide variant
Location: chr11:17470205 (GRCh38)
Gene constraint: LOEUF 0.829 · pLI <0.01 · ClinGen HI gene assoc. with recessive phenotype (gnomAD)
Structure: AlphaFold pLDDT 82.56 · 8 PDB

Full ABCC8 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

Inborn genetic diseases — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Similar variants

ABCC8 p.His103Tyr Uncertain significance ★★ ⚠ same residue
ABCC8 p.Arg1250Ter Pathogenic ★★ same condition
ABCC8 c.1923+3G>A Uncertain significance ★★ same condition
ABCC8 p.Ala365Val Uncertain significance ★★ ⚠ same condition
ABCC8 p.Ala478Ser Uncertain significance ★★ ⚠ same condition
ABCC8 p.Arg657Gln Uncertain significance ★★ ⚠ same condition
ABCC8 p.Arg992Pro Uncertain significance ★★ ⚠ same condition
ABCC8 p.Asp325Asn Uncertain significance ★★ ⚠ 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/abcc8-p-his103arg (accessed [today's date]).

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