COMP p.Pro646=
c.1938C>T · rs368459775 · VCV1571128
Likely benign
Single submitter
Classification
Likely benign
ClinVar
Review
Single submitter ★☆☆☆
ClinVar · 1 submitter
gnomAD v4.1
Rare
very rare (popmax 0.00667%, afr)
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 -9.6 | GERP -4 |
| Overall | ||
| CADD | 0.359 | PHRED · no single calibrated threshold — expert panels disagree |
Population frequency
gnomAD v4.1 · exomes + genomes
Grpmax group
0.00667%
African / African-American · 5/74,926 alleles
Filtering AF
0.00255%
ClinGen BA1/BS1 input
FAF95, joint · FAF99 0.00161%
Overall
0.00211%
34/1,613,868 alleles · very rare
| Ancestry group | Frequency | 1 in |
|---|---|---|
| African / African-Americangrpmax | 0.00667% | 14,985 |
| East Asian | 0.00223% | 44,900 |
| European (non-Finnish) | 0.0022% | 45,386 |
| Admixed American | 0.00167% | 59,994 |
| Remaining individualsnot grpmax-eligible | 0.0016% | 62,484 |
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
- COMP
- Protein
- p.Pro646=
- Coding
- c.1938C>T
- MANE Select
- NM_000095
- dbSNP
- rs368459775
- Type
- single nucleotide variant
- Location
- chr19:18784340 (GRCh38)
- Gene constraint
- LOEUF 1.073 · pLI <0.01 · ClinGen HI 0/3 (gnomAD)
- Structure
- AlphaFold pLDDT 88.60 · 1 PDB
- Residue 646
- the tsp c-terminal domain; the 'mediates cell survival and induction of the iap family of survival proteins' region; a disulfide bond
Similar variants
- COMP p.Arg718Trp Pathogenic/Likely pathogenic ★★ ⚠ same type
- COMP p.Asn489Lys Pathogenic/Likely pathogenic ★★ same type
- COMP p.Asn523Lys Pathogenic/Likely pathogenic ★★ same type
- COMP p.Asn555Lys Pathogenic/Likely pathogenic ★★ same type
- COMP p.Asp269Gly Pathogenic/Likely pathogenic ★★ same type
- COMP p.Asp273Val Likely pathogenic ★★ same type
- COMP p.Asp326Asn Pathogenic/Likely pathogenic ★★ same type
- COMP p.Asp349His 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/comp-p-pro646 (accessed [today's date]).
Preprint & method: sugi.bio/variant/method Machine-readable: this page as Markdown