Is ABCC8 p.Tyr356= (c.1068C>T) pathogenic?

ABCC8 p.Tyr356= (c.1068C>T) is classified Likely benign in ABCC8 (ClinVar, Multiple submitters, 3 submitters; last evaluated 2024-05-23). Very rare (popmax 0.00167%, amr); Associated with hypoglycemia, leucine-induced.

What condition is associated with ABCC8 p.Tyr356= (c.1068C>T)?

ABCC8 p.Tyr356= (c.1068C>T) is associated with hypoglycemia, leucine-induced, type 2 diabetes mellitus, hyperinsulinemic hypoglycemia, familial, 1 (ClinVar).

How common is ABCC8 p.Tyr356= (c.1068C>T) in the general population?

ABCC8 p.Tyr356= (c.1068C>T) is very rare (popmax 0.00167%, amr) (gnomAD).

ABCC8 p.Tyr356=

c.1068C>T · rs776713811 · VCV1111377

Likely benign Multiple submitters

Classification

Likely benign

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 3 submitters

gnomAD v4.1

Rare

very rare (popmax 0.00167%, amr)

Conditions

hypoglycemia, leucine-induced

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 -0.49	GERP -4.4, phastCons 0.002
Overall
CADD	8.242	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.00167% Admixed American · 1/59,998 alleles

Filtering AF 0.000124% ClinGen BA1/BS1 input FAF95, joint · FAF99 9e-05%

Overall 0.000496% 8/1,614,008 alleles · very rare

Ancestry group	Frequency	1 in
Admixed Americangrpmax	0.00167%	59,998
Remaining individualsnot grpmax-eligible	0.0016%	62,488
South Asian	0.0011%	91,070
European (non-Finnish)	0.000424%	236,003

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.Tyr356=
Coding: c.1068C>T
MANE Select: NM_000352
dbSNP: rs776713811
Type: single nucleotide variant
Location: chr11:17453227 (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 356: an α-helix; the abc transmembrane type-1 1 domain

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

Disease context

hypoglycemia, leucine-induced — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Also linked: type 2 diabetes mellitus hyperinsulinemic hypoglycemia, familial, 1 diabetes mellitus, transient neonatal, 2 diabetes mellitus, permanent neonatal 3

Similar variants

ABCC8 p.Tyr356Cys Conflicting classifications of pathogenicity ★ ⚠ same residue
ABCC8 p.Tyr356Ter Pathogenic ★ same residue
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

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-tyr356 (accessed [today's date]).

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