Is CCT5 p.Arg142Cys (c.424C>T) pathogenic?

CCT5 p.Arg142Cys (c.424C>T) is classified Uncertain significance in CCT5 (ClinVar, Multiple submitters, 3 submitters; last evaluated 2025-07-16). AlphaMissense: likely benign (0.1196); Ultra-rare (popmax 0.0194%, nfe); Associated with hereditary sensory and autonomic neuropathy with spastic paraplegia.

What condition is associated with CCT5 p.Arg142Cys (c.424C>T)?

CCT5 p.Arg142Cys (c.424C>T) is associated with hereditary sensory and autonomic neuropathy with spastic paraplegia (ClinVar).

How common is CCT5 p.Arg142Cys (c.424C>T) in the general population?

CCT5 p.Arg142Cys (c.424C>T) is ultra-rare (popmax 0.0194%, nfe) (gnomAD).

What do computational predictors say about CCT5 p.Arg142Cys (c.424C>T)?

AlphaMissense predicts likely benign (score 0.1196) — an in-silico prediction, not a clinical call.

CCT5 p.Arg142Cys

Q: How is Mutilating hereditary sensory neuropathy with spastic paraplegia inherited?

Typically Autosomal recessive (Orphanet). A genetic counselor can assess individual risk for a family.

c.424C>T · rs572671693 · VCV840756

Uncertain significance Multiple submitters

Classification

Uncertain significance

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 3 submitters

AlphaMissense

likely benign

0.1196 · ACMG-weighted

gnomAD v4.1

Rare

ultra-rare (popmax 0.0194%, nfe)

Missense predictors

1/2 damaging

AlphaMissense, SaProt · REVEL no call

Conditions

hereditary sensory and autonomic neuropathy with spastic paraplegia

Computational evidence

Protein change
AlphaMissense	0.1196	likely benign
REVEL	0.535	indeterminate
SaProt	LLR -11.31	damaging
⇒ SaProt calls this damaging; AlphaMissense does not; REVEL makes no call.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 4.9	GERP 2.6, phastCons 1
Regional constraint	o/e 0.75	unconstrained · MANE · 5,706 bp · p 0.00087 · regional, not allelic
Overall
CADD	26.9	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 0.0194% European (non-Finnish) · 229/1,179,958 alleles

Filtering AF 0.0173% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.0165%

Overall 0.0152% 245/1,614,068 alleles · ultra-rare

Ancestry group	Frequency	1 in
European (non-Finnish)grpmax	0.0194%	5,153
Admixed American	0.0117%	8,574
Remaining individualsnot grpmax-eligible	0.008%	12,500
African / African-American	0.00267%	37,516
Finnishnot grpmax-eligible	0.00156%	64,038
South Asian	0.0011%	91,060

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: CCT5
Protein: p.Arg142Cys
Coding: c.424C>T
MANE Select: NM_012073
dbSNP: rs572671693
Type: single nucleotide variant
Location: chr5:10256047 (GRCh38)
Gene constraint: LOEUF 0.235 · pLI 1.00 · ClinGen HI gene assoc. with recessive phenotype (gnomAD)
Structure: AlphaFold pLDDT 89.34 · 75 PDB
Residue 142: an α-helix

Full CCT5 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

hereditary sensory and autonomic neuropathy with spastic paraplegia — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

For Mutilating hereditary sensory neuropathy with spastic paraplegia (Orphanet):

Inheritance: Autosomal recessive
Onset: Childhood, Infancy

Similar variants

CCT5 p.Arg142= Benign ★★ same residue
CCT5 p.Arg142His Uncertain significance ★ ⚠ same residue
CCT5 p.Arg142Leu Uncertain significance ★ ⚠ same residue
CCT5 c.531-3C>T Uncertain significance ★★ same condition
CCT5 c.*1126T>A Uncertain significance ★★ same condition
CCT5 c.*567G>A Uncertain significance ★★ same condition
CCT5 p.Ala246Val Uncertain significance ★★ ⚠ same condition
CCT5 p.Ala41Gly 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/cct5-p-arg142cys (accessed [today's date]).

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