Is COL6A1 p.Pro495= (c.1485T>C) pathogenic?

COL6A1 p.Pro495= (c.1485T>C) is classified Likely benign in COL6A1 (ClinVar, Single submitter, 1 submitter; last evaluated 2023-02-02). Very rare (popmax 0.00227%, eas); Associated with Bethlem myopathy 1A.

What condition is associated with COL6A1 p.Pro495= (c.1485T>C)?

COL6A1 p.Pro495= (c.1485T>C) is associated with Bethlem myopathy 1A (ClinVar).

How common is COL6A1 p.Pro495= (c.1485T>C) in the general population?

COL6A1 p.Pro495= (c.1485T>C) is very rare (popmax 0.00227%, eas) (gnomAD).

How is Bethlem muscular dystrophy inherited?

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

COL6A1 p.Pro495=

c.1485T>C · rs553663114 · VCV2830663

Likely benign Single submitter

Classification

Likely benign

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

gnomAD v4.1

Rare

very rare (popmax 0.00227%, eas)

Conditions

Bethlem myopathy 1A

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 -16	GERP -2.8
Overall
CADD	0.269	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.00227% East Asian · 1/44,064 alleles

Overall 0.000125% 2/1,595,632 alleles · very rare

Ancestry group	Frequency	1 in
East Asiangrpmax	0.00227%	44,064
Admixed American	0.00173%	57,846

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: COL6A1
Protein: p.Pro495=
Coding: c.1485T>C
MANE Select: NM_001848
dbSNP: rs553663114
Type: single nucleotide variant
Location: chr21:45997723 (GRCh38)
Gene constraint: LOEUF 0.706 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 71.28 · 1 PDB
Residue 495: the 'disordered' region; the 'triple-helical region' region

Full COL6A1 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

COL6A1 p.Pro495Ser Likely pathogenic ★ ⚠ same residue
COL6A1 c.1002+1G>A Pathogenic ★★ same condition
COL6A1 c.1003-1G>A Pathogenic ★★ same condition
COL6A1 c.1003-2A>C Pathogenic ★★ same condition
COL6A1 c.1003-2A>G Pathogenic ★★ same condition
COL6A1 c.1056+1G>A Pathogenic/Likely pathogenic ★★ same condition
COL6A1 c.1056+1G>C Pathogenic ★★ same condition
COL6A1 c.1056+2T>A 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/col6a1-p-pro495 (accessed [today's date]).

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