Is BAP1 p.Arg208Trp (c.622C>T) pathogenic?

BAP1 p.Arg208Trp (c.622C>T) is classified Uncertain significance in BAP1 (ClinVar, Multiple submitters, 3 submitters; last evaluated 2025-06-18). AlphaMissense: likely pathogenic (0.9687); Very rare (popmax 0.00237%, eas); Associated with hereditary neoplastic syndrome.

What condition is associated with BAP1 p.Arg208Trp (c.622C>T)?

BAP1 p.Arg208Trp (c.622C>T) is associated with hereditary neoplastic syndrome, BAP1-related tumor predisposition syndrome (ClinVar).

How common is BAP1 p.Arg208Trp (c.622C>T) in the general population?

BAP1 p.Arg208Trp (c.622C>T) is very rare (popmax 0.00237%, eas) (gnomAD).

What do computational predictors say about BAP1 p.Arg208Trp (c.622C>T)?

AlphaMissense predicts likely pathogenic (score 0.9687) — an in-silico prediction, not a clinical call.

BAP1 p.Arg208Trp

c.622C>T · rs1705177686 · VCV962862

Uncertain significance Multiple submitters

Classification

Uncertain significance

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 3 submitters

AlphaMissense

likely pathogenic

0.9687 · ACMG-weighted

gnomAD v4.1

Rare

very rare (popmax 0.00237%, eas)

Missense predictors

2/2 damaging

AlphaMissense, SaProt · REVEL no call

Conditions

hereditary neoplastic syndrome

Computational evidence

Protein change
AlphaMissense	0.9687	likely pathogenic
REVEL	0.473	indeterminate
SaProt	LLR -13.71	damaging
⇒ AlphaMissense and SaProt both call this damaging; REVEL makes no call.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 1.9	GERP -3, phastCons 0.99
Overall
CADD	25.5	PHRED · no single calibrated threshold — expert panels disagree

ClinVar classifies this uncertain; the computational predictors unanimously lean damaging — 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 0.00237% East Asian · 1/42,214 alleles

Overall 0.000141% 2/1,414,910 alleles · very rare

Ancestry group	Frequency	1 in
East Asiangrpmax	0.00237%	42,214
African / African-American	0.00135%	73,896

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.Arg208Trp
Coding: c.622C>T
MANE Select: NM_004656
dbSNP: rs1705177686
Type: single nucleotide variant
Location: chr3:52406866 (GRCh38)
Gene constraint: LOEUF 0.324 · pLI 1.00 (gnomAD)
Structure: AlphaFold pLDDT 63.87 · 4 PDB
Residue 208: the uch catalytic domain; an α-helix

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

Also linked: BAP1-related tumor predisposition syndrome

Similar variants

BAP1 p.Arg208Gln Uncertain significance ★★ ⚠ same residue
BAP1 p.Arg208= Likely benign ★ 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-arg208trp (accessed [today's date]).

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