Is BAP1 p.Arg389His (c.1166G>A) pathogenic?

BAP1 p.Arg389His (c.1166G>A) is classified Conflicting classifications of pathogenicity in BAP1 (ClinVar, Conflicting submitters, 8 submitters; last evaluated 2025-11-24). AlphaMissense: likely benign (0.0779); Ultra-rare (popmax 0.0156%, eas); Associated with BAP1-related tumor predisposition syndrome.

What condition is associated with BAP1 p.Arg389His (c.1166G>A)?

BAP1 p.Arg389His (c.1166G>A) is associated with BAP1-related tumor predisposition syndrome, hereditary neoplastic syndrome (ClinVar).

How common is BAP1 p.Arg389His (c.1166G>A) in the general population?

BAP1 p.Arg389His (c.1166G>A) is ultra-rare (popmax 0.0156%, eas) (gnomAD).

How is BAP1-related tumor predisposition syndrome inherited?

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

What do computational predictors say about BAP1 p.Arg389His (c.1166G>A)?

AlphaMissense predicts likely benign (score 0.0779) — an in-silico prediction, not a clinical call.

BAP1 p.Arg389His

c.1166G>A · rs770778299 · VCV472660

Conflicting classifications of pathogenicity Conflicting submitters

Classification

Conflicting classifications of pathogenicity

ClinVar

Review

Conflicting submitters ★☆☆☆

ClinVar · 8 submitters

AlphaMissense

likely benign

0.0779 · ACMG-weighted

gnomAD v4.1

Rare

ultra-rare (popmax 0.0156%, eas)

Missense predictors

0/3 damaging

AlphaMissense, REVEL, SaProt

Conditions

BAP1-related tumor predisposition syndrome

Computational evidence

Protein change
AlphaMissense	0.0779	likely benign
REVEL	0.118	moderately benign-leaning
SaProt	LLR -6.87	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 6	GERP -0.47, phastCons 1
Overall
CADD	23.8	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

Grpmax group 0.0156% East Asian · 7/44,886 alleles

Filtering AF 0.00726% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.00514%

Overall 0.00136% 22/1,613,886 alleles · ultra-rare

Ancestry group	Frequency	1 in
East Asiangrpmax	0.0156%	6,412
Remaining individualsnot grpmax-eligible	0.0048%	20,825
Admixed American	0.00333%	29,993
European (non-Finnish)	0.000847%	118,000

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: BAP1
Protein: p.Arg389His
Coding: c.1166G>A
MANE Select: NM_007212 · reported on NM_004656
dbSNP: rs770778299
Type: single nucleotide variant
Location: chr3:52404537 (GRCh38)
Structure: AlphaFold pLDDT 78.27 · 28 PDB

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

Disease context

Also linked: hereditary neoplastic syndrome

For BAP1-related tumor predisposition syndrome (Orphanet):

Inheritance: Autosomal dominant
Onset: Adult

Similar variants

BAP1 p.Arg389= Likely benign ★★ same residue
BAP1 p.Arg389Cys Conflicting classifications of pathogenicity ★ ⚠ 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.122+5G>A Pathogenic/Likely pathogenic ★★ same condition
BAP1 c.122+5G>C Likely pathogenic ★★ same condition
BAP1 c.1251-1G>A 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-arg389his (accessed [today's date]).

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