Is CTSL p.Gly171Arg (c.511G>A) pathogenic?

CTSL p.Gly171Arg (c.511G>A) is classified Uncertain significance in CTSL (ClinVar, Single submitter, 1 submitter; last evaluated 2025-08-20). AlphaMissense: likely benign (0.1281); Absent from gnomAD v4.1.

How common is CTSL p.Gly171Arg (c.511G>A) in the general population?

CTSL p.Gly171Arg (c.511G>A) is absent from gnomAD v4.1 (gnomAD).

What do computational predictors say about CTSL p.Gly171Arg (c.511G>A)?

AlphaMissense predicts likely benign (score 0.1281) — an in-silico prediction, not a clinical call.

CTSL p.Gly171Arg

c.511G>A · VCV4235886

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.1281 · ACMG-weighted

gnomAD v4.1

Absent

absent from gnomAD v4.1

Missense predictors

0/3 damaging

AlphaMissense, REVEL, SaProt

Computational evidence

Protein change
AlphaMissense	0.1281	likely benign
REVEL	0.15	moderately benign-leaning
SaProt	LLR -6.09	tolerated
⇒ AlphaMissense, REVEL and SaProt all call this tolerated.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP -20	GERP -1.4
Regional constraint	o/e 0.89	unconstrained · MANE · 3,500 bp · p 0.025 · regional, not allelic
Overall
CADD	0.976	PHRED · no single calibrated threshold — expert panels disagree

ClinVar classifies this uncertain; the computational predictors unanimously lean tolerated — a triage signal, not a reclassification

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

Population frequency

gnomAD v4.1 · exomes + genomes

Absent from gnomAD v4.1. Not observed in any sequenced alleles — a rarity signal (ACMG PM2-supporting), not evidence of pathogenicity on its own.

Variant & gene context

Gene: CTSL
Protein: p.Gly171Arg
Coding: c.511G>A
MANE Select: NM_001912
Type: single nucleotide variant
Location: chr9:87728699 (GRCh38)
Gene constraint: LOEUF 0.932 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 93.75 · 64 PDB
Residue 171: a disulfide bond; a turn

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

Similar variants

CTSL p.Thr207Ile Uncertain significance ★★ ⚠ same type
CTSL p.Ser117Tyr Benign ★★ ⚠ same type
CTSL p.Ala143Thr Uncertain significance ★ ⚠ same type
CTSL p.Ala15Val Uncertain significance ★ ⚠ same type
CTSL p.Ala220Gly Uncertain significance ★ ⚠ same type
CTSL p.Ala50Gly Uncertain significance ★ ⚠ same type
CTSL p.Arg153Gln Uncertain significance ★ ⚠ same type
CTSL p.Arg153Trp 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/ctsl-p-gly171arg (accessed [today's date]).

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