LTBP2 p.Cys418=
c.1254C>T · rs140847432 · VCV1986028
Likely benign
Single submitter
Classification
Likely benign
ClinVar
Review
Single submitter ★☆☆☆
ClinVar · 1 submitter
gnomAD v4.1
Rare
very rare (popmax 0.00754%, nfe)
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 1.8 | GERP -3.7, phastCons 1 |
| Overall | ||
| CADD | 15.3 | PHRED · no single calibrated threshold — expert panels disagree |
Population frequency
gnomAD v4.1 · exomes + genomes
Grpmax group
0.00754%
European (non-Finnish) · 89/1,179,994 alleles
Filtering AF
0.00623%
ClinGen BA1/BS1 input
FAF95, joint · FAF99 0.00579%
Overall
0.00583%
94/1,612,208 alleles · very rare
| Ancestry group | Frequency | 1 in |
|---|---|---|
| European (non-Finnish)grpmax | 0.00754% | 13,258 |
| Remaining individualsnot grpmax-eligible | 0.0048% | 20,815 |
| African / African-American | 0.00267% | 37,469 |
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
- LTBP2
- Protein
- p.Cys418=
- Coding
- c.1254C>T
- MANE Select
- NM_000428
- dbSNP
- rs140847432
- Type
- single nucleotide variant
- Location
- chr14:74552332 (GRCh38)
- Gene constraint
- LOEUF 0.595 · pLI <0.01 (gnomAD)
- Structure
- AlphaFold pLDDT 58.33
- Residue 418
- the egf-like 2 domain; a disulfide bond
Similar variants
- LTBP2 p.Cys418Phe Uncertain significance ★ ⚠ same residue
- LTBP3 p.Pro418= Likely benign ★ same residue
- LTBP2 c.2389-2A>G Likely pathogenic ★★ same type
- LTBP2 c.2659+2T>C Likely pathogenic ★★ same type
- LTBP2 c.2789-1G>A Likely pathogenic ★★ same type
- LTBP2 c.2789-2A>T Likely pathogenic ★★ same type
- LTBP2 c.3652+1G>A Likely pathogenic ★★ same type
- LTBP2 p.Arg299Ter 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/ltbp2-p-cys418 (accessed [today's date]).
Preprint & method: sugi.bio/variant/method Machine-readable: this page as Markdown