Is CIC p.Ala1665Val (c.4994C>T) pathogenic?

CIC p.Ala1665Val (c.4994C>T) is classified Likely benign in CIC (ClinVar, Single submitter, 1 submitter; last evaluated 2025-08-07). AlphaMissense: likely benign (0.123); Ultra-rare (popmax 0.0307%, afr); Associated with Inborn genetic diseases.

What condition is associated with CIC p.Ala1665Val (c.4994C>T)?

CIC p.Ala1665Val (c.4994C>T) is associated with Inborn genetic diseases (ClinVar).

How common is CIC p.Ala1665Val (c.4994C>T) in the general population?

CIC p.Ala1665Val (c.4994C>T) is ultra-rare (popmax 0.0307%, afr) (gnomAD).

What do computational predictors say about CIC p.Ala1665Val (c.4994C>T)?

AlphaMissense predicts likely benign (score 0.123) — an in-silico prediction, not a clinical call.

CIC p.Ala1665Val

c.4994C>T · VCV4228897

Likely benign Single submitter

Classification

Likely benign

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.123 · ACMG-weighted

gnomAD v4.1

Rare

ultra-rare (popmax 0.0307%, afr)

Missense predictors

0/2 damaging

AlphaMissense, REVEL

Conditions

Inborn genetic diseases

Computational evidence

Protein change
AlphaMissense	0.123	likely benign
REVEL	0.126	moderately benign-leaning
⇒ AlphaMissense and REVEL both call this tolerated.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 7.7	GERP 1.4, phastCons 1
Overall
CADD	25.4	PHRED · no single calibrated threshold — expert panels disagree

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

⚠ Isoform check: AlphaMissense numbered on a different transcript (AM A756V vs ClinVar A1665V) — verify the residue.

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.0307% African / African-American · 23/74,906 alleles

Filtering AF 0.021% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.0178%

Overall 0.00322% 52/1,613,628 alleles · ultra-rare

Ancestry group	Frequency	1 in
African / African-Americangrpmax	0.0307%	3,257
Remaining individualsnot grpmax-eligible	0.0032%	31,232
East Asian	0.00223%	44,884
European (non-Finnish)	0.00212%	47,199
Admixed American	0.00167%	60,002

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: CIC
Protein: p.Ala1665Val
Coding: c.4994C>T
MANE Select: NM_005984 · reported on NM_001386298
Type: single nucleotide variant
Location: chr19:42291035 (GRCh38)
Structure: AlphaFold pLDDT 75.09

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

Disease context

Inborn genetic diseases — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Similar variants

CIC p.Ala1665Thr Uncertain significance ★ ⚠ same residue
CIC c.2795-2056C>T Uncertain significance ★★ ⚠ same condition
CIC p.Ala1228Val Uncertain significance ★★ ⚠ same condition
CIC p.Ala1445Gly Uncertain significance ★★ ⚠ same condition
CIC p.Ala1750Val Uncertain significance ★★ ⚠ same condition
CIC p.Ala1975Gly Uncertain significance ★★ ⚠ same condition
CIC p.Ala2463Thr Uncertain significance ★★ ⚠ same condition
CIC p.Arg1205Trp 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/cic-p-ala1665val (accessed [today's date]).

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