Is CCT5 p.Lys176Arg (c.527A>G) pathogenic?

CCT5 p.Lys176Arg (c.527A>G) is classified Uncertain significance in CCT5 (ClinVar, No assertion criteria, 1 submitter; last evaluated 2025-01-09). AlphaMissense: likely pathogenic (0.919); Absent from gnomAD v4.1.

How common is CCT5 p.Lys176Arg (c.527A>G) in the general population?

CCT5 p.Lys176Arg (c.527A>G) is absent from gnomAD v4.1 (gnomAD).

What do computational predictors say about CCT5 p.Lys176Arg (c.527A>G)?

AlphaMissense predicts likely pathogenic (score 0.919) — an in-silico prediction, not a clinical call.

CCT5 p.Lys176Arg

c.527A>G · VCV3544394

Uncertain significance No assertion criteria

Classification

Uncertain significance

ClinVar

Review

No assertion criteria ☆☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely pathogenic

0.919 · ACMG-weighted

gnomAD v4.1

Absent

absent from gnomAD v4.1

Missense predictors

3/3 damaging

AlphaMissense, REVEL, SaProt

Computational evidence

Protein change
AlphaMissense	0.919	likely pathogenic
REVEL	0.935	strongly pathogenic-leaning
SaProt	LLR -12.50	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 11	GERP 2.4, phastCons 1
Regional constraint	o/e 0.69	unconstrained · MANE · 7,066 bp · p 1.6e-09 · regional, not allelic
Overall
CADD	25.7	PHRED · no single calibrated threshold — expert panels disagree

ClinVar classifies this uncertain; the computational predictors unanimously lean damaging — 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: CCT5
Protein: p.Lys176Arg
Coding: c.527A>G
MANE Select: NM_012073
Type: single nucleotide variant
Location: chr5:10256150 (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 176: a UniProt-annotated variant site (found in a patient with severe developmental delay, intellectual disability, pyramidal and cerebellar signs, visual impairment, polymicrogyria and pontocerebellar hypoplasia; uncertain significance; the orthologous yeast mutation induces yeast lethality suggesting loss of function)

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

Similar variants

CCT5 c.531-3C>T Uncertain significance ★★ same type
CCT5 c.*1126T>A Uncertain significance ★★ same type
CCT5 c.*567G>A Uncertain significance ★★ same type
CCT5 p.Ala246Val Uncertain significance ★★ ⚠ same type
CCT5 p.Ala41Gly Uncertain significance ★★ ⚠ same type
CCT5 p.Ala424Ser Uncertain significance ★★ ⚠ same type
CCT5 p.Arg142Cys Uncertain significance ★★ ⚠ same type
CCT5 p.Arg400Leu 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/cct5-p-lys176arg (accessed [today's date]).

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