Is BSCL2 p.Pro258Arg (c.773C>G) pathogenic?

BSCL2 p.Pro258Arg (c.773C>G) is classified Uncertain significance in BSCL2 (ClinVar, Single submitter, 1 submitter; last evaluated 2022-03-30). AlphaMissense: likely pathogenic (0.8253); Absent from gnomAD v4.1.

How common is BSCL2 p.Pro258Arg (c.773C>G) in the general population?

BSCL2 p.Pro258Arg (c.773C>G) is absent from gnomAD v4.1 (gnomAD).

What do computational predictors say about BSCL2 p.Pro258Arg (c.773C>G)?

AlphaMissense predicts likely pathogenic (score 0.8253) — an in-silico prediction, not a clinical call.

BSCL2 p.Pro258Arg

c.773C>G · rs769219167 · VCV1707735

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely pathogenic

0.8253 · ACMG-weighted

gnomAD v4.1

Absent

absent from gnomAD v4.1

Missense predictors

3/3 damaging

AlphaMissense, REVEL, SaProt

Computational evidence

Protein change
AlphaMissense	0.8253	likely pathogenic
REVEL	0.882	moderately pathogenic-leaning
SaProt	LLR -13.28	damaging
⇒ AlphaMissense, REVEL and SaProt all call this damaging.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 12	GERP 2.4, phastCons 1
Regional constraint	o/e 0.60	unconstrained · MANE · 2,247 bp · p 9.1e-06 · regional, not allelic
Overall
CADD	25.6	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.

⚠ Isoform check: AlphaMissense numbered on a different transcript (AM P194R vs ClinVar P258R) — verify the residue.

Population frequency

gnomAD v4.1 · exomes + genomes

Absent from gnomAD v4.1. Not observed in any sequenced alleles — a rarity signal (ACMG PM2-supporting), not evidence of pathogenicity on its own.

Variant & gene context

Gene: BSCL2
Protein: p.Pro258Arg
Coding: c.773C>G
MANE Select: NM_001122955
dbSNP: rs769219167
Type: single nucleotide variant
Location: chr11:62692466 (GRCh38)
Gene constraint: LOEUF 0.869 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 75.09 · 1 PDB

Full BSCL2 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Similar variants

BSCL2 p.Pro258Leu Uncertain significance ★★ ⚠ same residue
BSCL2 p.Pro258= Likely benign ★★ same residue
BSCL2 p.Pro258Ser Uncertain significance ★ ⚠ same residue
BSCL2 c.1006-2A>C Likely pathogenic ★★ same type
BSCL2 c.1006-2A>G Pathogenic/Likely pathogenic ★★ same type
BSCL2 c.486+1G>A Pathogenic/Likely pathogenic ★★ same type
BSCL2 c.631-1G>C Pathogenic/Likely pathogenic ★★ same type
BSCL2 c.766-2A>G Pathogenic ★★ same type

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/bscl2-p-pro258arg (accessed [today's date]).

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