Is CRYAB p.Phe27Leu (c.81C>G) pathogenic?

CRYAB p.Phe27Leu (c.81C>G) is classified Uncertain significance in CRYAB (ClinVar, Single submitter, 1 submitter; last evaluated 2023-11-21). AlphaMissense: likely pathogenic (0.648); Absent from gnomAD v4.1; Associated with Cardiovascular phenotype.

What condition is associated with CRYAB p.Phe27Leu (c.81C>G)?

CRYAB p.Phe27Leu (c.81C>G) is associated with Cardiovascular phenotype (ClinVar).

How common is CRYAB p.Phe27Leu (c.81C>G) in the general population?

CRYAB p.Phe27Leu (c.81C>G) is absent from gnomAD v4.1 (gnomAD).

What do computational predictors say about CRYAB p.Phe27Leu (c.81C>G)?

AlphaMissense predicts likely pathogenic (score 0.648) — an in-silico prediction, not a clinical call.

CRYAB p.Phe27Leu

c.81C>G · rs574335724 · VCV3077702

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely pathogenic

0.648 · ACMG-weighted

gnomAD v4.1

Absent

absent from gnomAD v4.1

Missense predictors

1/2 damaging

AlphaMissense, SaProt · REVEL no call

Conditions

Cardiovascular phenotype

Computational evidence

Protein change
AlphaMissense	0.648	likely pathogenic
REVEL	0.295	indeterminate
SaProt	LLR -6.19	tolerated
⇒ AlphaMissense calls this damaging; SaProt does not; REVEL makes no call.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 6.6	GERP 0.38, phastCons 1
Regional constraint	o/e 0.89	unconstrained · MANE · 1,286 bp · p 0.3 · regional, not allelic
Overall
CADD	21.0	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: CRYAB
Protein: p.Phe27Leu
Coding: c.81C>G
MANE Select: NM_001289808
dbSNP: rs574335724
Type: single nucleotide variant
Location: chr11:111911644 (GRCh38)
Gene constraint: LOEUF 1.18 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 75.42 · 21 PDB

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

Disease context

Cardiovascular phenotype — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Similar variants

CRYAB c.324+4T>A Uncertain significance ★★ same condition
CRYAB c.325-2A>G Uncertain significance ★★ same condition
CRYAB c.-5C>T Uncertain significance ★★ same condition
CRYAB p.Ala171Thr Uncertain significance ★★ ⚠ same condition
CRYAB p.Arg11Cys Uncertain significance ★★ ⚠ same condition
CRYAB p.Arg123Gln Uncertain significance ★★ ⚠ same condition
CRYAB p.Arg157Cys Uncertain significance ★★ ⚠ same condition
CRYAB p.Arg163His 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/cryab-p-phe27leu (accessed [today's date]).

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