Is ABCC2 p.Tyr1027= (c.3081C>T) pathogenic?

ABCC2 p.Tyr1027= (c.3081C>T) is classified Conflicting classifications of pathogenicity in ABCC2 (ClinVar, Conflicting submitters, 3 submitters; last evaluated 2024-03-21). Ultra-rare (popmax 0.04%, afr); Associated with Dubin-Johnson syndrome.

What condition is associated with ABCC2 p.Tyr1027= (c.3081C>T)?

ABCC2 p.Tyr1027= (c.3081C>T) is associated with Dubin-Johnson syndrome (ClinVar).

How common is ABCC2 p.Tyr1027= (c.3081C>T) in the general population?

ABCC2 p.Tyr1027= (c.3081C>T) is ultra-rare (popmax 0.04%, afr) (gnomAD).

How is Dubin-Johnson syndrome inherited?

Typically Autosomal recessive (Orphanet). A genetic counselor can assess individual risk for a family.

ABCC2 p.Tyr1027=

c.3081C>T · rs201212360 · VCV289549

Conflicting classifications of pathogenicity Conflicting submitters

Classification

Conflicting classifications of pathogenicity

ClinVar

Review

Conflicting submitters ★☆☆☆

ClinVar · 3 submitters

gnomAD v4.1

Rare

ultra-rare (popmax 0.04%, afr)

Conditions

Dubin-Johnson syndrome

Computational evidence

Protein change
Missense predictors do not apply to this variant type; conservation carries the signal.
Splicing
SpliceAI	<0.2	all four deltas below 0.2 · C>G here scores Δ0.30 · evaluated, not missing
Constraint at this position
Conservation	phyloP -1.5	GERP -5.3
Overall
CADD	2.945	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.04% African / African-American · 30/75,036 alleles

Filtering AF 0.0288% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.0249%

Overall 0.00366% 59/1,614,158 alleles · ultra-rare

Ancestry group	Frequency	1 in
African / African-Americangrpmax	0.04%	2,501
Middle Eastern	0.0165%	6,062
Admixed American	0.00333%	30,007
East Asian	0.00223%	44,894
European (non-Finnish)	0.00195%	51,305
Remaining individualsnot grpmax-eligible	0.0016%	62,508
South Asian	0.0011%	91,080

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: ABCC2
Protein: p.Tyr1027=
Coding: c.3081C>T
MANE Select: NM_000392
dbSNP: rs201212360
Type: single nucleotide variant
Location: chr10:99831808 (GRCh38)
Gene constraint: LOEUF 0.985 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 81.40 · 16 PDB
Residue 1027: an α-helix; the abc transmembrane type-1 2 domain

Full ABCC2 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

Dubin-Johnson syndrome — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

For Dubin-Johnson syndrome (Orphanet):

Inheritance: Autosomal recessive
Onset: Adolescent, Adult

Similar variants

ABCC2 p.Tyr1027Ter Pathogenic ★ same residue
ABCC2 c.1031+4A>G Pathogenic/Likely pathogenic ★★ same condition
ABCC2 c.3258+1G>A Pathogenic/Likely pathogenic ★★ same condition
ABCC2 c.333+1G>A Likely pathogenic ★★ same condition
ABCC2 c.3415-1G>A Pathogenic/Likely pathogenic ★★ same condition
ABCC2 c.3741+1G>A Pathogenic/Likely pathogenic ★★ same condition
ABCC2 c.3741+1G>T Pathogenic/Likely pathogenic ★★ same condition
ABCC2 c.576+1G>A 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/abcc2-p-tyr1027 (accessed [today's date]).

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