Is COL6A2 p.Ser686Arg (c.2056A>C) pathogenic?

COL6A2 p.Ser686Arg (c.2056A>C) is classified Uncertain significance in COL6A2 (ClinVar, Single submitter, 1 submitter; last evaluated 2022-04-15). AlphaMissense: likely benign (0.1855); Absent from gnomAD v4.1; Associated with Bethlem myopathy 1A.

What condition is associated with COL6A2 p.Ser686Arg (c.2056A>C)?

COL6A2 p.Ser686Arg (c.2056A>C) is associated with Bethlem myopathy 1A (ClinVar).

How common is COL6A2 p.Ser686Arg (c.2056A>C) in the general population?

COL6A2 p.Ser686Arg (c.2056A>C) is absent from gnomAD v4.1 (gnomAD).

How is Bethlem muscular dystrophy inherited?

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

What do computational predictors say about COL6A2 p.Ser686Arg (c.2056A>C)?

AlphaMissense predicts likely benign (score 0.1855) — an in-silico prediction, not a clinical call.

COL6A2 p.Ser686Arg

c.2056A>C · rs2517017563 · VCV2126510

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.1855 · ACMG-weighted

gnomAD v4.1

Absent

absent from gnomAD v4.1

Missense predictors

1/3 damaging

AlphaMissense, REVEL, SaProt

Conditions

Bethlem myopathy 1A

Computational evidence

Protein change
AlphaMissense	0.1855	likely benign
REVEL	0.696	pathogenic-leaning
SaProt	LLR -7.41	tolerated
⇒ REVEL calls this damaging; AlphaMissense and SaProt do not.
Splicing
SpliceAI	Δ0.35	acceptor gain · deltas
Constraint at this position
Conservation	phyloP 7.5	GERP 0.39, phastCons 1
Regional constraint	o/e 1.16	unconstrained · MANE · 16 kb · p 1.4e-07 · regional, not allelic
Overall
CADD	24.6	PHRED · no single calibrated threshold — expert panels disagree

AlphaMissense carries the ACMG weight for missense; REVEL and SaProt are independent agreement signals.

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: COL6A2
Protein: p.Ser686Arg
Coding: c.2056A>C
MANE Select: NM_001849
dbSNP: rs2517017563
Type: single nucleotide variant
Location: chr21:46125871 (GRCh38)
Gene constraint: LOEUF 0.895 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 69.58 · 1 PDB
Residue 686: the vwfa 2 domain; the 'nonhelical region' region

Full COL6A2 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

Bethlem myopathy 1A — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

For Bethlem muscular dystrophy (Orphanet):

Inheritance: Autosomal dominant, Autosomal recessive
Onset: Childhood, Infancy
Prevalence: 1-9 / 1 000 000 (United Kingdom)

Similar variants

COL6A2 p.Ser686= Conflicting classifications of pathogenicity ★ same residue
COL6A2 c.1000-1G>T Pathogenic ★★ same condition
COL6A2 c.1000-2A>C Pathogenic ★★ same condition
COL6A2 c.1053+1G>A Pathogenic ★★ same condition
COL6A2 c.1053+1G>C Pathogenic/Likely pathogenic ★★ same condition
COL6A2 c.1053+2T>C Pathogenic/Likely pathogenic ★★ same condition
COL6A2 c.1054-2A>G Pathogenic/Likely pathogenic ★★ same condition
COL6A2 c.115+2T>C Pathogenic/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/col6a2-p-ser686arg (accessed [today's date]).

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