Is ABCB11 p.Phe266fs (c.798del) pathogenic?

ABCB11 p.Phe266fs (c.798del) is classified Likely pathogenic in ABCB11 (ClinVar, Multiple submitters, 2 submitters; last evaluated 2024-04-25). Absent from gnomAD; Associated with progressive familial intrahepatic cholestasis type 2.

What condition is associated with ABCB11 p.Phe266fs (c.798del)?

ABCB11 p.Phe266fs (c.798del) is associated with progressive familial intrahepatic cholestasis type 2, benign recurrent intrahepatic cholestasis type 2 (ClinVar).

How common is ABCB11 p.Phe266fs (c.798del) in the general population?

ABCB11 p.Phe266fs (c.798del) is absent from gnomAD (gnomAD).

How is Progressive familial intrahepatic cholestasis inherited?

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

ABCB11 p.Phe266fs

c.798del · rs2545442611 · VCV2679749

Likely pathogenic Multiple submitters

Classification

Likely pathogenic

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 2 submitters

Consequence

frameshift

predicted LoF

gnomAD v4.1

Not reported

no gnomAD frequency available for this variant

Conditions

progressive familial intrahepatic cholestasis type 2

Computational evidence

Protein change
Missense predictors do not apply to this variant type; conservation carries the signal.
Consequence	frameshift	predicted loss-of-function; NMD-escape possible for C-terminal truncations
Splicing
SpliceAI	—	not assessed · substitutions only
Constraint at this position
Conservation	phyloP 7.8	GERP 2.1, phastCons 1

Predicted loss-of-function is descriptive, not an applied PVS1 code.

Population frequency

dbSNP / gnomAD

No gnomAD frequency available for this variant. This is missing data, not an absence: the variant may or may not be present in gnomAD. Rarity (ACMG PM2) and BA1/BS1 cannot be assessed for it.

Variant & gene context

Gene: ABCB11
Protein: p.Phe266fs
Coding: c.798del
MANE Select: NM_003742
dbSNP: rs2545442611
Type: Deletion
Location: chr2:168990911 (GRCh38)
Gene constraint: LOEUF 0.739 · pLI <0.01 · ClinGen HI gene assoc. with recessive phenotype (gnomAD)
Structure: AlphaFold pLDDT 83.23 · 9 PDB
Residue 266: an α-helix; the abc transmembrane type-1 1 domain

Full ABCB11 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

progressive familial intrahepatic cholestasis type 2 — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Also linked: benign recurrent intrahepatic cholestasis type 2

For Progressive familial intrahepatic cholestasis (Orphanet):

Inheritance: Autosomal recessive
Onset: Adolescent, Childhood, Infancy, Neonatal

Similar variants

ABCB11 p.Arg830fs Pathogenic ★★ same condition
ABCB11 p.Asn199fs Pathogenic/Likely pathogenic ★★ same condition
ABCB11 p.Asp848fs Pathogenic/Likely pathogenic ★★ same condition
ABCB11 p.Gln1058fs Pathogenic ★★ same condition
ABCB11 p.Gly1267fs Likely pathogenic ★★ same condition
ABCB11 p.Gly648fs Pathogenic ★★ same condition
ABCB11 p.His717fs Pathogenic/Likely pathogenic ★★ same condition
ABCB11 p.Ile1061fs 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/abcb11-p-phe266fs (accessed [today's date]).

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