Is BAP1 c.1983+6T>C pathogenic?

BAP1 c.1983+6T>C is classified Likely benign in BAP1 (ClinVar, Multiple submitters, 2 submitters; last evaluated 2026-01-19). Very rare (popmax 0.000169%, nfe); Associated with hereditary neoplastic syndrome.

What condition is associated with BAP1 c.1983+6T>C?

BAP1 c.1983+6T>C is associated with hereditary neoplastic syndrome, BAP1-related tumor predisposition syndrome (ClinVar).

How common is BAP1 c.1983+6T>C in the general population?

BAP1 c.1983+6T>C is very rare (popmax 0.000169%, nfe) (gnomAD).

BAP1 c.1983+6T>C

rs1553644657 · VCV490830

Likely benign Multiple submitters

Classification

Likely benign

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 2 submitters

gnomAD v4.1

Rare

very rare (popmax 0.000169%, nfe)

Conditions

hereditary neoplastic syndrome

Computational evidence

Protein change
Missense predictors do not apply to this variant type; conservation carries the signal.
Splicing
Splice region	donor +6	donor splice region (+6, within the first 6 intronic nt) · inside the BP7-excluded zone
SpliceAI	<0.2	all four deltas below 0.2 · A>C here scores Δ0.34 · evaluated, not missing
Constraint at this position
Conservation	phyloP 2.6	GERP -1.3, phastCons 0.93
Non-coding constraint	Z 5.30	1 kb window · o/e 0.65 · regional · uncalibrated
Overall
CADD	19.39	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.000169% European (non-Finnish) · 2/1,180,024 alleles

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

Overall 0.000137% 2/1,461,890 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: BAP1
Coding: c.1983+6T>C
MANE Select: NM_007212 · reported on NM_004656
dbSNP: rs1553644657
Type: single nucleotide variant
Location: chr3:52402773 (GRCh38)
Structure: AlphaFold pLDDT 78.27 · 28 PDB

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 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
BAP1 c.1251-1G>C 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-c-1983-plus-6t-c (accessed [today's date]).

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