Is BSN p.Ala1255= (c.3765C>T) pathogenic?

BSN p.Ala1255= (c.3765C>T) is classified Likely benign in BSN (ClinVar, No assertion criteria, 1 submitter; last evaluated 2019-11-16). Rare (popmax 0.436%, afr); Associated with BSN-related disorder.

What condition is associated with BSN p.Ala1255= (c.3765C>T)?

BSN p.Ala1255= (c.3765C>T) is associated with BSN-related disorder (ClinVar).

How common is BSN p.Ala1255= (c.3765C>T) in the general population?

BSN p.Ala1255= (c.3765C>T) is rare (popmax 0.436%, afr) (gnomAD).

BSN p.Ala1255=

c.3765C>T · rs114065907 · VCV3048662

Likely benign No assertion criteria

Classification

Likely benign

ClinVar

Review

No assertion criteria ☆☆☆☆

ClinVar · 1 submitter

gnomAD v4.1

Rare

rare (popmax 0.436%, afr)

Conditions

BSN-related disorder

Computational evidence

Protein change
Missense predictors do not apply to this variant type; conservation carries the signal.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP -12	GERP -4.5
Overall
CADD	0.053	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.436% African / African-American · 327/75,022 alleles

Filtering AF 0.397% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.382%

Overall 0.023% 371/1,612,072 alleles · rare

Ancestry group	Frequency	1 in
African / African-Americangrpmax	0.436%	229
Admixed American	0.0334%	2,995
Remaining individualsnot grpmax-eligible	0.0256%	3,902
South Asian	0.0055%	18,173
European (non-Finnish)	0.000254%	393,153

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: BSN
Protein: p.Ala1255=
Coding: c.3765C>T
MANE Select: NM_003458
dbSNP: rs114065907
Type: single nucleotide variant
Location: chr3:49653321 (GRCh38)
Gene constraint: LOEUF 0.271 · pLI 1.00 (gnomAD)

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

Disease context

BSN-related disorder

Similar variants

BSN p.Arg1145Trp Uncertain significance ★★ ⚠ same condition
BSN p.Leu2466Ile Uncertain significance ★★ ⚠ same condition
BSN p.Pro2732Arg Uncertain significance ★★ same condition
BSN p.Gln1776Ter Likely pathogenic ★ same condition
BSN p.Gln3155Ter Likely pathogenic ★ same condition
BSN p.Gln875Ter Pathogenic ★ same condition
BSN p.Arg1066Cys Uncertain significance ★ ⚠ same condition
BSN p.Arg110Ter Uncertain significance ★ 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/bsn-p-ala1255 (accessed [today's date]).

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