Is COL2A1 p.Val116Ala (c.347T>C) pathogenic?

COL2A1 p.Val116Ala (c.347T>C) is classified Uncertain significance in COL2A1 (ClinVar, Multiple submitters, 3 submitters; last evaluated 2025-03-27). AlphaMissense: likely benign (0.1114); Very rare (popmax 0.00167%, amr); Associated with Inborn genetic diseases.

What condition is associated with COL2A1 p.Val116Ala (c.347T>C)?

COL2A1 p.Val116Ala (c.347T>C) is associated with Inborn genetic diseases (ClinVar).

How common is COL2A1 p.Val116Ala (c.347T>C) in the general population?

COL2A1 p.Val116Ala (c.347T>C) is very rare (popmax 0.00167%, amr) (gnomAD).

What do computational predictors say about COL2A1 p.Val116Ala (c.347T>C)?

AlphaMissense predicts likely benign (score 0.1114) — an in-silico prediction, not a clinical call.

COL2A1 p.Val116Ala

c.347T>C · rs779950053 · VCV1695856

Uncertain significance Multiple submitters

Classification

Uncertain significance

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 3 submitters

AlphaMissense

likely benign

0.1114 · ACMG-weighted

gnomAD v4.1

Rare

very rare (popmax 0.00167%, amr)

Missense predictors

0/2 damaging

AlphaMissense, SaProt · REVEL no call

Conditions

Inborn genetic diseases

Computational evidence

Protein change
AlphaMissense	0.1114	likely benign
REVEL	0.293	indeterminate
SaProt	LLR -6.58	tolerated
⇒ AlphaMissense and SaProt both call this tolerated; REVEL makes no call.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 7	GERP 0.37, phastCons 1
Regional constraint	o/e 0.83	unconstrained · MANE · 7,716 bp · p 0.0078 · regional, not allelic
Overall
CADD	21.1	PHRED · no single calibrated threshold — expert panels disagree

ClinVar classifies this uncertain; the computational predictors unanimously lean tolerated — a triage signal, not a reclassification

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

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.00167% Admixed American · 1/60,026 alleles

Filtering AF 0.000292% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.000211%

Overall 0.000684% 10/1,461,866 alleles · very rare

Ancestry group	Frequency	1 in
Admixed Americangrpmax	0.00167%	60,026
Remaining individualsnot grpmax-eligible	0.0016%	62,512
European (non-Finnish)	0.000678%	147,503

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: COL2A1
Protein: p.Val116Ala
Coding: c.347T>C
MANE Select: NM_001844
dbSNP: rs779950053
Type: single nucleotide variant
Location: chr12:47998060 (GRCh38)
Gene constraint: LOEUF 0.183 · pLI 1.00 · ClinGen HI 3/3 (gnomAD)
Structure: AlphaFold pLDDT 53.56 · 11 PDB
Residue 116: the 'disordered' region

Full COL2A1 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

Inborn genetic diseases — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Similar variants

COL2A1 p.Val116= Likely benign ★ same residue
COL2A1 p.Cys52Ter Pathogenic/Likely pathogenic ★★ same condition
COL2A1 p.Gln39Ter Pathogenic ★★ same condition
COL2A1 p.Gly546Ser Pathogenic/Likely pathogenic ★★ same condition
COL2A1 p.Gly930Asp Likely pathogenic ★★ same condition
COL2A1 p.Ala1093Val Uncertain significance ★★ ⚠ same condition
COL2A1 p.Ala180Thr Uncertain significance ★★ ⚠ same condition
COL2A1 p.Ala559Ser 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/col2a1-p-val116ala (accessed [today's date]).

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