CLTC p.Ala1648=
c.4944C>T · rs148633723 · VCV1570494
Likely benign
Multiple submitters
Classification
Likely benign
ClinVar
Review
Multiple submitters ★★☆☆
ClinVar · 3 submitters
gnomAD v4.1
Rare
ultra-rare (popmax 0.0373%, sas)
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 1.3 | GERP -3.4, phastCons 1 |
| Overall | ||
| CADD | 12.56 | PHRED · no single calibrated threshold — expert panels disagree |
Population frequency
gnomAD v4.1 · exomes + genomes
Grpmax group
0.0373%
South Asian · 34/91,058 alleles
Filtering AF
0.0274%
ClinGen BA1/BS1 input
FAF95, joint · FAF99 0.024%
Overall
0.00917%
148/1,613,642 alleles · ultra-rare
| Ancestry group | Frequency | 1 in |
|---|---|---|
| South Asiangrpmax | 0.0373% | 2,678 |
| African / African-American | 0.00935% | 10,697 |
| European (non-Finnish) | 0.00831% | 12,039 |
| Remaining individualsnot grpmax-eligible | 0.0064% | 15,618 |
| Finnishnot grpmax-eligible | 0.00469% | 21,335 |
| East Asian | 0.00223% | 44,840 |
| Admixed American | 0.00167% | 59,974 |
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
- CLTC
- Protein
- p.Ala1648=
- Coding
- c.4944C>T
- MANE Select
- NM_004859
- dbSNP
- rs148633723
- Type
- single nucleotide variant
- Location
- chr17:59693768 (GRCh38)
- Gene constraint
- LOEUF 0.104 · pLI 1.00 · ClinGen HI 3/3 (gnomAD)
- Structure
- AlphaFold pLDDT 75.62 · 10 PDB
- Residue 1648
- the 'heavy chain arm' region; the 'proximal segment' region; the 'trimerization' region; a UniProt-annotated variant site (in mrd56)
Similar variants
- CLTC p.Arg1165Ter Likely pathogenic ★★ same type
- CLTC p.Arg1251Ter Pathogenic/Likely pathogenic ★★ same type
- CLTC p.Arg1311Ter Likely pathogenic ★★ same type
- CLTC p.Arg63Ter Pathogenic ★★ same type
- CLTC p.Pro890Leu Pathogenic/Likely pathogenic ★★ same type
- CLTC p.Tyr1574Ter Pathogenic/Likely pathogenic ★★ same type
- CLTC p.Tyr803Ter Pathogenic/Likely pathogenic ★★ same type
- CLTC c.4605+3T>A Uncertain significance ★★ 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/cltc-p-ala1648 (accessed [today's date]).
Preprint & method: sugi.bio/variant/method Machine-readable: this page as Markdown