Is FREM2 p.Ala337Val (c.1010C>T) pathogenic?

FREM2 p.Ala337Val (c.1010C>T) is classified Uncertain significance in FREM2 (ClinVar, Single submitter, 1 submitter; last evaluated 2024-04-22). AlphaMissense: ambiguous (0.4681); Very rare (popmax 0.00167%, amr); Associated with Fraser syndrome 2.

What condition is associated with FREM2 p.Ala337Val (c.1010C>T)?

FREM2 p.Ala337Val (c.1010C>T) is associated with Fraser syndrome 2, isolated cryptophthalmia (ClinVar).

How common is FREM2 p.Ala337Val (c.1010C>T) in the general population?

FREM2 p.Ala337Val (c.1010C>T) is very rare (popmax 0.00167%, amr) (gnomAD).

What do computational predictors say about FREM2 p.Ala337Val (c.1010C>T)?

AlphaMissense predicts ambiguous (score 0.4681) — an in-silico prediction, not a clinical call.

FREM2 p.Ala337Val

c.1010C>T · VCV3575982

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

ambiguous

0.4681 · ACMG-weighted

gnomAD v4.1

Rare

very rare (popmax 0.00167%, amr)

Conditions

Fraser syndrome 2

Computational evidence

Protein change
AlphaMissense	0.4681	ambiguous
REVEL	0.271	benign-leaning
SaProt	—	not scored · why
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 7.6	GERP 2.7, phastCons 1
Regional constraint	o/e 1.05	unconstrained · MANE · 169 kb · p 0.0054 · regional, not allelic
Overall
CADD	25.8	PHRED · no single calibrated threshold — expert panels disagree

AlphaMissense carries the ACMG weight for missense; REVEL is an independent agreement signal.

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.00167% Admixed American · 1/60,030 alleles

Filtering AF 0.000124% ClinGen BA1/BS1 input FAF95, joint · FAF99 9e-05%

Overall 0.000434% 7/1,614,170 alleles · very rare exomes 7/1,461,842 · genomes 0/152,328 · joint denominator

Ancestry group	Frequency	1 in
Admixed Americangrpmax	0.00167%	60,030
Finnishnot grpmax-eligible	0.00156%	64,026
European (non-Finnish)	0.000424%	236,004

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: FREM2
Protein: p.Ala337Val
Coding: c.1010C>T
MANE Select: NM_207361
Type: single nucleotide variant
Location: chr13:38688354 (GRCh38)
Gene constraint: LOEUF 0.588 · pLI <0.01 (gnomAD)

Full FREM2 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

Fraser syndrome 2 — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Also linked: isolated cryptophthalmia

Similar variants

FREM2 p.Ala337Ser Uncertain significance ★ ⚠ same residue
FREM2 p.Arg1355Ter Pathogenic/Likely pathogenic ★★ same condition
FREM2 p.Arg638Ter Likely pathogenic ★★ same condition
FREM2 p.Arg736Ter Pathogenic ★★ same condition
FREM2 p.Arg809Ter Pathogenic ★★ same condition
FREM2 p.Gln1051Ter Pathogenic/Likely pathogenic ★★ same condition
FREM2 p.Gln717Ter Likely pathogenic ★★ same condition
FREM2 p.Ala1659Thr 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/frem2-p-ala337val (accessed [today's date]).

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