COL14A1

Chr 8

collagen type XIV alpha 1 chain

Also known as: UND

The encoded protein is the alpha chain of type XIV collagen, which plays an adhesive role by integrating collagen bundles and regulating collagen fibril formation in connective tissues. Mutations cause Ehlers-Danlos syndrome, musculocontractural type 2, which follows an autosomal recessive inheritance pattern and presents with joint contractures, skin hyperextensibility, and musculoskeletal abnormalities. The gene shows moderate constraint against loss-of-function variants (LOEUF 0.535).

OMIMResearchSummary from RefSeq, UniProt
DNmechanismLOEUF 0.54
Clinical SummaryCOL14A1
Population Constraint (gnomAD)
Low constraint (pLI 0.00) — loss-of-function variants are relatively tolerated in the population.
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Clinical Trials
2 active or recruiting trials — potential therapeutic options may be available

Population Genetics & Constraint

gnomAD v4 — loss-of-function & missense intolerance

Moderate LoF intolerance
LoF Constraint
0.54LOEUF
pLI 0.000
Z-score 5.47
OE 0.41 (0.320.54)
Moderately constrained

More LoF-intolerant than ~75% of genes

Missense Constraint
1.54Z-score
OE missense 0.86 (0.810.91)
843 obs / 978.8 exp
Tolerant

Mild missense constraint

Observed / Expected Ratios
LoF OE0.41 (0.320.54)
00.351.4
Missense OE0.86 (0.810.91)
00.61.4
Synonymous OE1.00
01.21.6
LoF obs/exp: 42 / 101.5Missense obs/exp: 843 / 978.8Syn Z: 0.01
DN
0.6938th %ile
GOF
0.6249th %ile
LOF
0.3355th %ile

The highest-scoring mechanism for this gene is dominant-negative.

DNprediction above median

Note: In-silico variant effect predictors (SIFT, PolyPhen, REVEL, CADD) may underestimate pathogenicity of missense variants in genes with GOF or DN mechanisms. Consider functional evidence and clinical context.

Predictions from Badonyi M, Marsh JA. PLoS ONE. 2024;19(8):e0307312.

ClinVar Variant Classifications

0 submitted variants in ClinVar

Protein Context — Lollipop Plot

COL14A1 · protein map & ClinVar variants

Showing all ClinVar variants across the protein. Search a specific variant to highlight its position.

3D Protein StructureAlphaFold
Clinical Literature
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