Is CES1 p.Thr291Ala (c.871A>G) pathogenic?

CES1 p.Thr291Ala (c.871A>G) is classified Uncertain significance in CES1 (ClinVar, Single submitter, 1 submitter; last evaluated 2025-09-10). AlphaMissense: likely benign (0.1588); Absent from gnomAD v4.1.

How common is CES1 p.Thr291Ala (c.871A>G) in the general population?

CES1 p.Thr291Ala (c.871A>G) is absent from gnomAD v4.1 (gnomAD).

What do computational predictors say about CES1 p.Thr291Ala (c.871A>G)?

AlphaMissense predicts likely benign (score 0.1588) — an in-silico prediction, not a clinical call.

CES1 p.Thr291Ala

c.871A>G · VCV4226726

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.1588 · ACMG-weighted

gnomAD v4.1

Absent

absent from gnomAD v4.1

Missense predictors

1/3 damaging

AlphaMissense, REVEL, SaProt

Computational evidence

Protein change
AlphaMissense	0.1588	likely benign
REVEL	0.071	moderately benign-leaning
SaProt	LLR -10.64	damaging
⇒ SaProt calls this damaging; AlphaMissense and REVEL do not.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 0.1	GERP -1.1, phastCons 0.84
Regional constraint	o/e 1.30	unconstrained · MANE · 17 kb · p 1.4e-05 · regional, not allelic
Overall
CADD	21.4	PHRED · no single calibrated threshold — expert panels disagree

AlphaMissense carries the ACMG weight for missense; REVEL and SaProt are independent agreement signals.

⚠ Isoform check: AlphaMissense numbered on a different transcript (AM T290A vs ClinVar T291A) — verify the residue.

Population frequency

gnomAD v4.1 · exomes + genomes

Absent from gnomAD v4.1. Not observed in any sequenced alleles — a rarity signal (ACMG PM2-supporting), not evidence of pathogenicity on its own.

Variant & gene context

Gene: CES1
Protein: p.Thr291Ala
Coding: c.871A>G
MANE Select: NM_001025195
Type: single nucleotide variant
Location: chr16:55819570 (GRCh38)
Gene constraint: LOEUF 1.272 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 93.27 · 21 PDB
Residue 291: an α-helix

Full CES1 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Similar variants

CES1 p.Val166Met Uncertain significance ★★ ⚠ same type
CES2 p.Glu366= Benign ★★ same type
CES1 p.Ala126Asp Uncertain significance ★ ⚠ same type
CES1 p.Ala126Val Uncertain significance ★ ⚠ same type
CES1 p.Ala149Glu Uncertain significance ★ ⚠ same type
CES1 p.Ala160Thr Uncertain significance ★ ⚠ same type
CES1 p.Ala197Asp Uncertain significance ★ ⚠ same type
CES1 p.Ala338Gly 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/ces1-p-thr291ala (accessed [today's date]).

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