Is CIT p.Val1409Ile (c.4225G>A) pathogenic?

CIT p.Val1409Ile (c.4225G>A) is classified Uncertain significance in CIT (ClinVar, Single submitter, 1 submitter; last evaluated 2025-07-08). AlphaMissense: likely benign (0.0867); Very rare (popmax 0.00668%, afr).

How common is CIT p.Val1409Ile (c.4225G>A) in the general population?

CIT p.Val1409Ile (c.4225G>A) is very rare (popmax 0.00668%, afr) (gnomAD).

What do computational predictors say about CIT p.Val1409Ile (c.4225G>A)?

AlphaMissense predicts likely benign (score 0.0867) — an in-silico prediction, not a clinical call.

CIT p.Val1409Ile

c.4225G>A · VCV4797036

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.0867 · ACMG-weighted

gnomAD v4.1

Rare

very rare (popmax 0.00668%, afr)

Missense predictors

0/2 damaging

AlphaMissense, SaProt · REVEL no call

Computational evidence

Protein change
AlphaMissense	0.0867	likely benign
REVEL	0.337	indeterminate
SaProt	LLR -5.92	tolerated
⇒ AlphaMissense and SaProt both call this tolerated; REVEL makes no call.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 6	GERP 1.9, phastCons 1
Regional constraint	o/e 0.73	unconstrained · MANE · 32 kb · p 1.5e-18 · regional, not allelic
Overall
CADD	29.6	PHRED · no single calibrated threshold — expert panels disagree

ClinVar classifies this uncertain; the computational predictors unanimously lean tolerated — a triage signal, not a reclassification

AlphaMissense carries the ACMG weight for missense; REVEL and SaProt are independent agreement signals.

⚠ Isoform check: AlphaMissense numbered on a different transcript (AM V1367I vs ClinVar V1409I) — verify the residue.

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.00668% African / African-American · 5/74,880 alleles

Filtering AF 0.00255% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.00162%

Overall 0.000929% 15/1,613,956 alleles · very rare

Ancestry group	Frequency	1 in
African / African-Americangrpmax	0.00668%	14,976
South Asian	0.00329%	30,360
East Asian	0.00223%	44,884
European (non-Finnish)	0.000508%	196,670

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: CIT
Protein: p.Val1409Ile
Coding: c.4225G>A
MANE Select: NM_001206999
Type: single nucleotide variant
Location: chr12:119714278 (GRCh38)
Gene constraint: LOEUF 0.353 · pLI 1.00 (gnomAD)
Structure: AlphaFold pLDDT 69.75

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

Similar variants

CIT p.Arg1178Ter Pathogenic ★★ same type
CIT p.Arg220Ter Pathogenic ★★ same type
CIT c.4168+5G>A Uncertain significance ★★ same type
CIT p.Ala1144Thr Uncertain significance ★★ ⚠ same type
CIT p.Ala1466Asp Uncertain significance ★★ ⚠ same type
CIT p.Ala1527Val Uncertain significance ★★ ⚠ same type
CIT p.Ala244Val Uncertain significance ★★ ⚠ same type
CIT p.Ala495Ser 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/cit-p-val1409ile (accessed [today's date]).

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