Is CCT5 p.Met91Val (c.271A>G) pathogenic?

CCT5 p.Met91Val (c.271A>G) is classified Uncertain significance in CCT5 (ClinVar, Single submitter, 1 submitter; last evaluated 2022-03-09). AlphaMissense: ambiguous (0.3653); Absent from gnomAD v4.1; Associated with hereditary sensory and autonomic neuropathy with spastic paraplegia.

What condition is associated with CCT5 p.Met91Val (c.271A>G)?

CCT5 p.Met91Val (c.271A>G) is associated with hereditary sensory and autonomic neuropathy with spastic paraplegia (ClinVar).

How common is CCT5 p.Met91Val (c.271A>G) in the general population?

CCT5 p.Met91Val (c.271A>G) is absent from gnomAD v4.1 (gnomAD).

What do computational predictors say about CCT5 p.Met91Val (c.271A>G)?

AlphaMissense predicts ambiguous (score 0.3653) — an in-silico prediction, not a clinical call.

CCT5 p.Met91Val

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.271A>G · rs1745593343 · VCV1039017

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

ambiguous

0.3653 · ACMG-weighted

gnomAD v4.1

Absent

absent from gnomAD v4.1

Conditions

hereditary sensory and autonomic neuropathy with spastic paraplegia

Computational evidence

Protein change
AlphaMissense	0.3653	ambiguous
REVEL	0.418	indeterminate
SaProt	LLR -11.54	damaging
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 11	GERP 0.42, phastCons 1
Regional constraint	o/e 0.75	unconstrained · MANE · 5,706 bp · p 0.00087 · regional, not allelic
Overall
CADD	24.8	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: CCT5
Protein: p.Met91Val
Coding: c.271A>G
MANE Select: NM_012073
dbSNP: rs1745593343
Type: single nucleotide variant
Location: chr5:10254778 (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 91: 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 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
CCT5 p.Ala424Ser Uncertain significance ★★ ⚠ same condition
CCT5 p.Arg142Cys Uncertain significance ★★ ⚠ same condition
CCT5 p.Arg400Leu 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-met91val (accessed [today's date]).

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