Is ABCC8 p.Val222Met (c.664G>A) pathogenic?

ABCC8 p.Val222Met (c.664G>A) is classified Uncertain significance in ABCC8 (ClinVar, Multiple submitters, 4 submitters; last evaluated 2025-04-30). AlphaMissense: likely pathogenic (0.9506); Very rare (popmax 0.0089%, nfe); Associated with type 2 diabetes mellitus.

What condition is associated with ABCC8 p.Val222Met (c.664G>A)?

ABCC8 p.Val222Met (c.664G>A) is associated with type 2 diabetes mellitus, hypoglycemia, leucine-induced, hyperinsulinemic hypoglycemia, familial, 1 (ClinVar).

How common is ABCC8 p.Val222Met (c.664G>A) in the general population?

ABCC8 p.Val222Met (c.664G>A) is very rare (popmax 0.0089%, nfe) (gnomAD).

What do computational predictors say about ABCC8 p.Val222Met (c.664G>A)?

AlphaMissense predicts likely pathogenic (score 0.9506) — an in-silico prediction, not a clinical call.

ABCC8 p.Val222Met

c.664G>A · VCV3599416

Uncertain significance Multiple submitters

Classification

Uncertain significance

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 4 submitters

AlphaMissense

likely pathogenic

0.9506 · ACMG-weighted

gnomAD v4.1

Rare

very rare (popmax 0.0089%, nfe)

Missense predictors

2/3 damaging

AlphaMissense, REVEL, SaProt

Conditions

type 2 diabetes mellitus

Computational evidence

Protein change
AlphaMissense	0.9506	likely pathogenic
REVEL	0.891	moderately pathogenic-leaning
SaProt	LLR -9.75	tolerated
⇒ AlphaMissense and REVEL call this damaging; SaProt does not.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 7.7	GERP 1.4, phastCons 1
Regional constraint	o/e 0.84	unconstrained · MANE · 84 kb · p 1.4e-12 · regional, not allelic
Overall
CADD	31.0	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 0.0089% European (non-Finnish) · 105/1,180,040 alleles

Filtering AF 0.00749% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.007%

Overall 0.00675% 109/1,614,026 alleles · very rare

Ancestry group	Frequency	1 in
European (non-Finnish)grpmax	0.0089%	11,238
African / African-American	0.00401%	24,966
Remaining individualsnot grpmax-eligible	0.0016%	62,490

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: ABCC8
Protein: p.Val222Met
Coding: c.664G>A
MANE Select: NM_000352
Type: single nucleotide variant
Location: chr11:17461741 (GRCh38)
Gene constraint: LOEUF 0.829 · pLI <0.01 · ClinGen HI gene assoc. with recessive phenotype (gnomAD)
Structure: AlphaFold pLDDT 82.56 · 8 PDB
Residue 222: a UniProt-annotated variant site (in mody12; uncertain significance)

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

Disease context

type 2 diabetes mellitus — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Also linked: hypoglycemia, leucine-induced hyperinsulinemic hypoglycemia, familial, 1 diabetes mellitus, transient neonatal, 2 diabetes mellitus, permanent neonatal 3

Similar variants

ABCC8 c.1176+2T>C Pathogenic/Likely pathogenic ★★ same condition
ABCC8 c.1333-1013A>G Pathogenic/Likely pathogenic ★★ same condition
ABCC8 c.148+1G>A Pathogenic/Likely pathogenic ★★ same condition
ABCC8 c.148+2T>G Likely pathogenic ★★ same condition
ABCC8 c.1630+1G>A Pathogenic/Likely pathogenic ★★ same condition
ABCC8 c.1630+1G>T Pathogenic ★★ same condition
ABCC8 c.1817+1G>C Pathogenic ★★ same condition
ABCC8 c.1817+2T>C 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/abcc8-p-val222met (accessed [today's date]).

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