Is BAP1 p.Leu440Arg (c.1319T>G) pathogenic?

BAP1 p.Leu440Arg (c.1319T>G) is classified Uncertain significance in BAP1 (ClinVar, Single submitter, 1 submitter; last evaluated 2024-06-07). AlphaMissense: ambiguous (0.5089); Absent from gnomAD v4.1; Associated with hereditary neoplastic syndrome.

What condition is associated with BAP1 p.Leu440Arg (c.1319T>G)?

BAP1 p.Leu440Arg (c.1319T>G) is associated with hereditary neoplastic syndrome (ClinVar).

How common is BAP1 p.Leu440Arg (c.1319T>G) in the general population?

BAP1 p.Leu440Arg (c.1319T>G) is absent from gnomAD v4.1 (gnomAD).

What do computational predictors say about BAP1 p.Leu440Arg (c.1319T>G)?

AlphaMissense predicts ambiguous (score 0.5089) — an in-silico prediction, not a clinical call.

BAP1 p.Leu440Arg

c.1319T>G · VCV3260399

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

ambiguous

0.5089 · ACMG-weighted

gnomAD v4.1

Absent

absent from gnomAD v4.1

Missense predictors

0/2 damaging

REVEL, SaProt · AlphaMissense no call

Conditions

hereditary neoplastic syndrome

Computational evidence

Protein change
AlphaMissense	0.5089	ambiguous
REVEL	0.166	moderately benign-leaning
SaProt	LLR -7.11	tolerated
⇒ REVEL and SaProt both call this tolerated; AlphaMissense makes no call.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 11	GERP 2.1, phastCons 1
Overall
CADD	23.2	PHRED · no single calibrated threshold — expert panels disagree

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

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: BAP1
Protein: p.Leu440Arg
Coding: c.1319T>G
MANE Select: NM_004656
Type: single nucleotide variant
Location: chr3:52403826 (GRCh38)
Gene constraint: LOEUF 0.324 · pLI 1.00 (gnomAD)
Structure: AlphaFold pLDDT 63.87 · 4 PDB
Residue 440: a UniProt-annotated variant site (in tpds1)

Full BAP1 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

hereditary neoplastic syndrome — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Similar variants

BAP1 p.Leu440Pro Uncertain significance ★★ ⚠ same residue
BAP1 p.Leu440= Likely benign ★ same residue
BAP1 p.Leu440Val Uncertain significance ★ ⚠ same residue
BAP1 c.1117-1G>A Likely pathogenic ★★ same condition
BAP1 c.122+1G>A Pathogenic ★★ same condition
BAP1 c.122+1G>T Pathogenic/Likely pathogenic ★★ same condition
BAP1 c.1251-1G>A Likely pathogenic ★★ same condition
BAP1 c.1251-2A>G Likely 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/bap1-p-leu440arg (accessed [today's date]).

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