Is CTSC p.Leu196Pro (c.587T>C) pathogenic?

CTSC p.Leu196Pro (c.587T>C) is classified Pathogenic/Likely pathogenic in CTSC (ClinVar, Multiple submitters, 4 submitters; last evaluated 2025-02-24). AlphaMissense: likely pathogenic (0.7073); Ultra-rare (popmax 0.0133%, afr); Associated with periodontitis, aggressive.

What condition is associated with CTSC p.Leu196Pro (c.587T>C)?

CTSC p.Leu196Pro (c.587T>C) is associated with periodontitis, aggressive, Papillon-Lefevre disease, Haim-Munk syndrome (ClinVar).

How common is CTSC p.Leu196Pro (c.587T>C) in the general population?

CTSC p.Leu196Pro (c.587T>C) is ultra-rare (popmax 0.0133%, afr) (gnomAD).

What do computational predictors say about CTSC p.Leu196Pro (c.587T>C)?

AlphaMissense predicts likely pathogenic (score 0.7073) — an in-silico prediction, not a clinical call.

CTSC p.Leu196Pro

c.587T>C · rs34876841 · VCV2137219

Pathogenic/Likely pathogenic Multiple submitters

Classification

Pathogenic/Likely pathogenic

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 4 submitters

AlphaMissense

likely pathogenic

0.7073 · ACMG-weighted

gnomAD v4.1

Rare

ultra-rare (popmax 0.0133%, afr)

Missense predictors

3/3 damaging

AlphaMissense, REVEL, SaProt

Conditions

periodontitis, aggressive

Computational evidence

Protein change
AlphaMissense	0.7073	likely pathogenic ✓ concordant with ClinVar
REVEL	0.721	pathogenic-leaning
SaProt	LLR -13.76	damaging
⇒ AlphaMissense, REVEL and SaProt all call this damaging.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 9.2	GERP 1.9, phastCons 1
Regional constraint	o/e 1.05	unconstrained · MANE · 44 kb · p 0.26 · regional, not allelic
Overall
CADD	26.4	PHRED · no single calibrated threshold — expert panels disagree

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

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.0133% African / African-American · 10/74,920 alleles

Filtering AF 0.00723% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.0055%

Overall 0.00136% 22/1,613,854 alleles · ultra-rare

Ancestry group	Frequency	1 in
African / African-Americangrpmax	0.0133%	7,492
European (non-Finnish)	0.00102%	98,322

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: CTSC
Protein: p.Leu196Pro
Coding: c.587T>C
MANE Select: NM_001814
dbSNP: rs34876841
Type: single nucleotide variant
Location: chr11:88309217 (GRCh38)
Gene constraint: LOEUF 1.051 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 90.64 · 18 PDB

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

Disease context

periodontitis, aggressive — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Also linked: Papillon-Lefevre disease Haim-Munk syndrome

Similar variants

CTSC p.Leu196fs Pathogenic ★ same residue
CTSC c.319-1G>A Pathogenic ★★ same condition
CTSC c.757+1G>T Likely pathogenic ★★ same condition
CTSC c.-55C>A Pathogenic ★★ same condition
CTSC p.Arg210Ter Pathogenic ★★ same condition
CTSC p.Arg250Ter Pathogenic/Likely pathogenic ★★ same condition
CTSC p.Arg272His Pathogenic/Likely pathogenic ★★ ⚠ same condition
CTSC p.Arg272Pro Pathogenic/Likely pathogenic ★★ 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/ctsc-p-leu196pro (accessed [today's date]).

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