Is CYTH4 p.Val93Ile (c.277G>A) pathogenic?

CYTH4 p.Val93Ile (c.277G>A) is classified Likely benign in CYTH4 (ClinVar, Single submitter, 1 submitter; last evaluated 2024-03-15). AlphaMissense: likely benign (0.068); Very rare (popmax 0.00659%, sas).

How common is CYTH4 p.Val93Ile (c.277G>A) in the general population?

CYTH4 p.Val93Ile (c.277G>A) is very rare (popmax 0.00659%, sas) (gnomAD).

What do computational predictors say about CYTH4 p.Val93Ile (c.277G>A)?

AlphaMissense predicts likely benign (score 0.068) — an in-silico prediction, not a clinical call.

CYTH4 p.Val93Ile

c.277G>A · VCV3270737

Likely benign Single submitter

Classification

Likely benign

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.068 · ACMG-weighted

gnomAD v4.1

Rare

very rare (popmax 0.00659%, sas)

Missense predictors

0/3 damaging

AlphaMissense, REVEL, SaProt

Computational evidence

Protein change
AlphaMissense	0.068	likely benign
REVEL	0.045	moderately benign-leaning
SaProt	LLR -8.09	tolerated
⇒ AlphaMissense, REVEL and SaProt all call this tolerated.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 0.61	GERP -3.3, phastCons 0.02
Regional constraint	o/e 0.78	unconstrained · MANE · 31 kb · p 5.9e-07 · regional, not allelic
Overall
CADD	8.407	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 0.00659% South Asian · 6/91,070 alleles

Filtering AF 0.00286% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.00195%

Overall 0.00149% 24/1,613,784 alleles · very rare

Ancestry group	Frequency	1 in
South Asiangrpmax	0.00659%	15,178
East Asian	0.00223%	44,892
European (non-Finnish)	0.00144%	69,406

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: CYTH4
Protein: p.Val93Ile
Coding: c.277G>A
MANE Select: NM_013385
Type: single nucleotide variant
Location: chr22:37297606 (GRCh38)
Gene constraint: LOEUF 0.516 · pLI 0.94 (gnomAD)
Structure: AlphaFold pLDDT 87.17
Residue 93: the sec7 domain

Full CYTH4 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Similar variants

CYTH4 p.Asn107His Benign ★★ ⚠ same type
CYTH4 p.Leu88= Benign ★★ same type
CYTH4 p.Met74Val Benign ★★ same type
CYTH4 p.Ala136Thr Uncertain significance ★ ⚠ same type
CYTH4 p.Ala166Val Uncertain significance ★ ⚠ same type
CYTH4 p.Ala9Glu Uncertain significance ★ ⚠ same type
CYTH4 p.Arg205Gln Uncertain significance ★ ⚠ same type
CYTH4 p.Arg212Cys 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/cyth4-p-val93ile (accessed [today's date]).

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