Is BIRC3 p.Leu26Ser (c.77T>C) pathogenic?

BIRC3 p.Leu26Ser (c.77T>C) is classified Uncertain significance in BIRC3 (ClinVar, Single submitter, 1 submitter; last evaluated 2025-11-20). AlphaMissense: likely benign (0.1845); Very rare (popmax 8.47e-05%, nfe).

How common is BIRC3 p.Leu26Ser (c.77T>C) in the general population?

BIRC3 p.Leu26Ser (c.77T>C) is very rare (popmax 8.47e-05%, nfe) (gnomAD).

What do computational predictors say about BIRC3 p.Leu26Ser (c.77T>C)?

AlphaMissense predicts likely benign (score 0.1845) — an in-silico prediction, not a clinical call.

BIRC3 p.Leu26Ser

c.77T>C · VCV4645958

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.1845 · ACMG-weighted

gnomAD v4.1

Rare

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

Missense predictors

0/3 damaging

AlphaMissense, REVEL, SaProt

Computational evidence

Protein change
AlphaMissense	0.1845	likely benign
REVEL	0.092	moderately benign-leaning
SaProt	LLR -8.00	tolerated
⇒ AlphaMissense, REVEL and SaProt all call this tolerated.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 2.1	GERP 1.9, phastCons 0.035
Regional constraint	o/e 0.90	unconstrained · MANE · 1,023 bp · p 0.056 · regional, not allelic
Overall
CADD	15.0	PHRED · no single calibrated threshold — expert panels disagree

ClinVar classifies this uncertain; the computational predictors unanimously lean tolerated — a triage signal, not a reclassification

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

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 8.47e-05% European (non-Finnish) · 1/1,179,984 alleles

Overall 6.84e-05% 1/1,461,822 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: BIRC3
Protein: p.Leu26Ser
Coding: c.77T>C
MANE Select: NM_001165
Type: single nucleotide variant
Location: chr11:102324586 (GRCh38)
Gene constraint: LOEUF 0.543 · pLI 0.81 (gnomAD)
Structure: AlphaFold pLDDT 75.13 · 6 PDB

Full BIRC3 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Similar variants

BIRC3 p.Leu26Phe Likely benign ★ same residue
BIRC3 p.Arg401Lys Likely benign ★★ same type
BIRC3 p.Arg555= Benign ★★ same type
BIRC3 p.Lys87= Benign ★★ same type
BIRC3 p.Asp530His Likely pathogenic ★ ⚠ same type
BIRC3 p.Cys557Ter Likely pathogenic ★ same type
BIRC3 p.Cys588Tyr Likely pathogenic ★ same type
BIRC3 p.His312Tyr Likely pathogenic ★ 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/birc3-p-leu26ser (accessed [today's date]).

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