Is ABCA1 p.Ile703= (c.2109C>T) pathogenic?

ABCA1 p.Ile703= (c.2109C>T) is classified Likely benign in ABCA1 (ClinVar, Single submitter, 1 submitter; last evaluated 2022-12-06). Very rare (popmax 0.00534%, afr); Associated with Cardiovascular phenotype.

What condition is associated with ABCA1 p.Ile703= (c.2109C>T)?

ABCA1 p.Ile703= (c.2109C>T) is associated with Cardiovascular phenotype (ClinVar).

How common is ABCA1 p.Ile703= (c.2109C>T) in the general population?

ABCA1 p.Ile703= (c.2109C>T) is very rare (popmax 0.00534%, afr) (gnomAD).

ABCA1 p.Ile703=

c.2109C>T · rs763225461 · VCV2454038

Likely benign Single submitter

Classification

Likely benign

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

gnomAD v4.1

Rare

very rare (popmax 0.00534%, afr)

Conditions

Cardiovascular phenotype

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 3.4	GERP 0.17, phastCons 1
Overall
CADD	9.89	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.00534% African / African-American · 4/74,894 alleles

Filtering AF 0.00175% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.00104%

Overall 0.00031% 5/1,613,954 alleles · very rare

Ancestry group	Frequency	1 in
African / African-Americangrpmax	0.00534%	18,724
South Asian	0.0011%	91,066

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: ABCA1
Protein: p.Ile703=
Coding: c.2109C>T
MANE Select: NM_005502
dbSNP: rs763225461
Type: single nucleotide variant
Location: chr9:104828922 (GRCh38)
Gene constraint: LOEUF 0.563 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 73.50 · 7 PDB
Residue 703: an α-helix

Full ABCA1 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

Cardiovascular phenotype — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Similar variants

ABCA1 c.4175+1G>T Pathogenic/Likely pathogenic ★★ same condition
ABCA1 p.Thr940Met Pathogenic/Likely pathogenic ★★ same condition
ABCA1 c.3787+5C>A Uncertain significance ★★ same condition
ABCA1 p.Ala1855Ser Uncertain significance ★★ ⚠ same condition
ABCA1 p.Ala766Ser Uncertain significance ★★ ⚠ same condition
ABCA1 p.Arg1283Cys Uncertain significance ★★ ⚠ same condition
ABCA1 p.Arg1342Trp Uncertain significance ★★ ⚠ same condition
ABCA1 p.Arg1417Cys 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/abca1-p-ile703 (accessed [today's date]).

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