Is ABCG2 p.Ser255Arg (c.765C>A) pathogenic?

ABCG2 p.Ser255Arg (c.765C>A) is classified Uncertain significance in ABCG2 (ClinVar, Single submitter, 1 submitter; last evaluated 2023-11-02). AlphaMissense: likely pathogenic (0.5929); Very rare (popmax 0.00161%, nfe).

How common is ABCG2 p.Ser255Arg (c.765C>A) in the general population?

ABCG2 p.Ser255Arg (c.765C>A) is very rare (popmax 0.00161%, nfe) (gnomAD).

What do computational predictors say about ABCG2 p.Ser255Arg (c.765C>A)?

AlphaMissense predicts likely pathogenic (score 0.5929) — an in-silico prediction, not a clinical call.

ABCG2 p.Ser255Arg

c.765C>A · rs201913594 · VCV3129645

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely pathogenic

0.5929 · ACMG-weighted

gnomAD v4.1

Rare

very rare (popmax 0.00161%, nfe)

Missense predictors

1/3 damaging

AlphaMissense, REVEL, SaProt

Computational evidence

Protein change
AlphaMissense	0.5929	likely pathogenic
REVEL	0.249	benign-leaning
SaProt	LLR -7.80	tolerated
⇒ AlphaMissense calls this damaging; REVEL and SaProt do not.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 0.72	GERP 0.96, phastCons 1
Regional constraint	o/e 1.01	unconstrained · MANE · 48 kb · p 0.73 · regional, not allelic
Overall
CADD	22.0	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 0.00161% European (non-Finnish) · 19/1,180,008 alleles

Filtering AF 0.00103% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.00083%

Overall 0.00124% 20/1,614,042 alleles · very rare exomes 18/1,461,824 · genomes 2/152,218 · joint denominator

Ancestry group	Frequency	1 in
European (non-Finnish)grpmax	0.00161%	62,106
African / African-American	0.00133%	74,930

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: ABCG2
Protein: p.Ser255Arg
Coding: c.765C>A
MANE Select: NM_004827
dbSNP: rs201913594
Type: single nucleotide variant
Location: chr4:88118185 (GRCh38)
Gene constraint: LOEUF 1.308 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 85.54 · 29 PDB
Residue 255: a β-strand; the abc transporter domain

Full ABCG2 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Similar variants

ABCG2 p.Tyr123= Benign ★★ same type
ABCG2 p.Ala505Gly Uncertain significance ★ ⚠ same type
ABCG2 p.Arg575Gln Uncertain significance ★ ⚠ same type
ABCG2 p.Asn289Lys Uncertain significance ★ ⚠ same type
ABCG2 p.Asp312Gly Uncertain significance ★ ⚠ same type
ABCG2 p.Asp419Tyr Uncertain significance ★ ⚠ same type
ABCG2 p.Gln324His Uncertain significance ★ ⚠ same type
ABCG2 p.Gln393Arg Uncertain significance ★ ⚠ same type

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/abcg2-p-ser255arg (accessed [today's date]).

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