Is ABCB6 p.Thr740= (c.2220C>T) pathogenic?

ABCB6 p.Thr740= (c.2220C>T) is classified Likely benign in ABCB6 (ClinVar, Single submitter, 1 submitter; last evaluated 2025-10-20). Very rare (popmax 8.47e-05%, nfe).

How common is ABCB6 p.Thr740= (c.2220C>T) in the general population?

ABCB6 p.Thr740= (c.2220C>T) is very rare (popmax 8.47e-05%, nfe) (gnomAD).

ABCB6 p.Thr740=

c.2220C>T · VCV4809700

Likely benign Single submitter

Classification

Likely benign

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

gnomAD v4.1

Rare

very rare (popmax 8.47e-05%, nfe)

Computational evidence

Protein change
Missense predictors do not apply to this variant type; conservation carries the signal.
REVEL	0.064	moderately benign-leaning
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 3.9	GERP 0.11, phastCons 1
Overall
CADD	9.865	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 8.47e-05% European (non-Finnish) · 1/1,180,018 alleles

Overall 6.84e-05% 1/1,461,498 alleles · very rare

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: ABCB6
Protein: p.Thr740=
Coding: c.2220C>T
MANE Select: NM_005689
Type: single nucleotide variant
Location: chr2:219210747 (GRCh38)
Gene constraint: LOEUF 0.984 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 83.17 · 16 PDB
Residue 740: an α-helix; the abc transporter domain

Full ABCB6 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Similar variants

ABCB6 p.Ala164Thr Uncertain significance ★★ ⚠ same type
ABCB6 p.Ala57Thr Uncertain significance ★★ ⚠ same type
ABCB6 p.Ala66Thr Uncertain significance ★★ ⚠ same type
ABCB6 p.Ala681Thr Uncertain significance ★★ ⚠ same type
ABCB6 p.Arg135Ser Uncertain significance ★★ ⚠ same type
ABCB6 p.Arg439Cys Uncertain significance ★★ ⚠ same type
ABCB6 p.Arg450Gln Uncertain significance ★★ ⚠ same type
ABCB6 p.Arg685His 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/abcb6-p-thr740 (accessed [today's date]).

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