Is BAP1 p.Thr677= (c.2031C>T) pathogenic?

BAP1 p.Thr677= (c.2031C>T) is classified Benign/Likely benign in BAP1 (ClinVar, Multiple submitters, 4 submitters; last evaluated 2024-12-04). Very rare (popmax 0.00223%, eas); Associated with BAP1-related tumor predisposition syndrome.

What condition is associated with BAP1 p.Thr677= (c.2031C>T)?

BAP1 p.Thr677= (c.2031C>T) is associated with BAP1-related tumor predisposition syndrome, hereditary neoplastic syndrome (ClinVar).

How common is BAP1 p.Thr677= (c.2031C>T) in the general population?

BAP1 p.Thr677= (c.2031C>T) is very rare (popmax 0.00223%, eas) (gnomAD).

How is BAP1-related tumor predisposition syndrome inherited?

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

BAP1 p.Thr677=

c.2031C>T · rs749373585 · VCV629896

Benign/Likely benign Multiple submitters

Classification

Benign/Likely benign

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 4 submitters

gnomAD v4.1

Rare

very rare (popmax 0.00223%, eas)

Conditions

BAP1-related tumor predisposition syndrome

Computational evidence

Protein change
Missense predictors do not apply to this variant type; conservation carries the signal.
REVEL	0.069	moderately benign-leaning
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 0.6	GERP -0.3, phastCons 1
Overall
CADD	6.914	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.00223% East Asian · 1/44,888 alleles

Filtering AF 2.8e-05% ClinGen BA1/BS1 input FAF95, joint · FAF99 1.1e-05%

Overall 0.000205% 3/1,461,860 alleles · very rare

Ancestry group	Frequency	1 in
East Asiangrpmax	0.00223%	44,888
European (non-Finnish)	0.000169%	590,016

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.Thr677=
Coding: c.2031C>T
MANE Select: NM_007212 · reported on NM_004656
dbSNP: rs749373585
Type: single nucleotide variant
Location: chr3:52402627 (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.Thr677Ile Uncertain significance ★★ ⚠ same residue
BAP1 p.Thr677Asn 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.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-thr677 (accessed [today's date]).

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