Is BRCA2 p.Ser636= (c.1908A>G) pathogenic?

BRCA2 p.Ser636= (c.1908A>G) is classified Conflicting classifications of pathogenicity in BRCA2 (ClinVar, Conflicting submitters, 2 submitters; last evaluated 2023-08-30). Very rare (popmax 0.00113%, sas); Associated with hereditary neoplastic syndrome.

What condition is associated with BRCA2 p.Ser636= (c.1908A>G)?

BRCA2 p.Ser636= (c.1908A>G) is associated with hereditary neoplastic syndrome, hereditary breast ovarian cancer syndrome (ClinVar).

How common is BRCA2 p.Ser636= (c.1908A>G) in the general population?

BRCA2 p.Ser636= (c.1908A>G) is very rare (popmax 0.00113%, sas) (gnomAD).

BRCA2 p.Ser636=

c.1908A>G · rs786201892 · VCV185052

Conflicting classifications of pathogenicity Conflicting submitters

Classification

Conflicting classifications of pathogenicity

ClinVar

Review

Conflicting submitters ★☆☆☆

ClinVar · 2 submitters

gnomAD v4.1

Rare

very rare (popmax 0.00113%, sas)

Conditions

hereditary neoplastic syndrome

Computational evidence

Protein change
Missense predictors do not apply to this variant type; conservation/SpliceAI carries the signal.
Splicing
SpliceAI	Δ0.28	donor loss · deltas
Pangolin	Δ0.49	loss · gain 0.02 · agrees with SpliceAI · independent
Constraint at this position
Conservation	phyloP 9.2	GERP 2.3, phastCons 1
Overall
CADD	18.87	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.00113% South Asian · 1/88,736 alleles

Overall 6.22e-05% 1/1,607,902 alleles · very rare exomes 1/1,455,828 · genomes 0/152,074 · joint denominator

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: BRCA2
Protein: p.Ser636=
Coding: c.1908A>G
MANE Select: NM_000059
dbSNP: rs786201892
Type: single nucleotide variant
Location: chr13:32333386 (GRCh38)
Gene constraint: LOEUF 0.803 · pLI <0.01 · ClinGen HI 3/3 (gnomAD)

Full BRCA2 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: hereditary breast ovarian cancer syndrome

Similar variants

BRCA2 p.Ser636Ter Pathogenic ★★★ same residue
BRCA2 p.Ser636Leu Uncertain significance ★★ ⚠ same residue
BRCA2 p.Ser636Val Conflicting classifications of pathogenicity ★ same residue
BRCA2 c.316+1G>T Pathogenic ★★★ same condition
BRCA2 c.316+2T>C Pathogenic ★★★ same condition
BRCA2 c.316+5G>A Pathogenic ★★★ same condition
BRCA2 c.316+5G>C Pathogenic ★★★ same condition
BRCA2 c.475+1G>A 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/brca2-p-ser636 (accessed [today's date]).

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