Is CTSD p.Thr155Ser (c.463A>T) pathogenic?

CTSD p.Thr155Ser (c.463A>T) is classified Uncertain significance in CTSD (ClinVar, Single submitter, 1 submitter; last evaluated 2021-08-31). AlphaMissense: likely benign (0.1324); Absent from gnomAD v4.1; Associated with neuronal ceroid lipofuscinosis.

What condition is associated with CTSD p.Thr155Ser (c.463A>T)?

CTSD p.Thr155Ser (c.463A>T) is associated with neuronal ceroid lipofuscinosis (ClinVar).

How common is CTSD p.Thr155Ser (c.463A>T) in the general population?

CTSD p.Thr155Ser (c.463A>T) is absent from gnomAD v4.1 (gnomAD).

What do computational predictors say about CTSD p.Thr155Ser (c.463A>T)?

AlphaMissense predicts likely benign (score 0.1324) — an in-silico prediction, not a clinical call.

CTSD p.Thr155Ser

c.463A>T · rs764778708 · VCV854400

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.1324 · ACMG-weighted

gnomAD v4.1

Absent

absent from gnomAD v4.1

Missense predictors

1/3 damaging

AlphaMissense, REVEL, SaProt

Conditions

neuronal ceroid lipofuscinosis

Computational evidence

Protein change
AlphaMissense	0.1324	likely benign
REVEL	0.281	benign-leaning
SaProt	LLR -10.74	damaging
⇒ SaProt calls this damaging; AlphaMissense and REVEL do not.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 4.8	GERP 1.5, phastCons 1
Regional constraint	o/e 0.87	unconstrained · MANE · 10 kb · p 0.0029 · regional, not allelic
Overall
CADD	21.5	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

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: CTSD
Protein: p.Thr155Ser
Coding: c.463A>T
MANE Select: NM_001909
dbSNP: rs764778708
Type: single nucleotide variant
Location: chr11:1758977 (GRCh38)
Gene constraint: LOEUF 0.886 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 85.69 · 9 PDB
Residue 155: a disulfide bond; a β-strand; the peptidase a1 domain

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

Disease context

neuronal ceroid lipofuscinosis — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Similar variants

CTSD p.Thr155= Benign ★★ same residue
CTSD p.Thr155fs Pathogenic ★ same residue
CTSD c.228+1G>A Likely pathogenic ★★ same condition
CTSD p.Glu82Ter Pathogenic/Likely pathogenic ★★ same condition
CTSD c.828-3C>A Uncertain significance ★★ same condition
CTSD p.Ala10Ser Uncertain significance ★★ ⚠ same condition
CTSD p.Ala18Pro Uncertain significance ★★ ⚠ same condition
CTSD p.Ala18Thr Uncertain significance ★★ ⚠ 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/ctsd-p-thr155ser (accessed [today's date]).

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