Is CA6 p.Val166Ile (c.496G>A) pathogenic?

CA6 p.Val166Ile (c.496G>A) is classified Uncertain significance in CA6 (ClinVar, Single submitter, 1 submitter; last evaluated 2024-06-26). AlphaMissense: likely benign (0.1537); Ultra-rare (popmax 0.0281%, afr).

How common is CA6 p.Val166Ile (c.496G>A) in the general population?

CA6 p.Val166Ile (c.496G>A) is ultra-rare (popmax 0.0281%, afr) (gnomAD).

What do computational predictors say about CA6 p.Val166Ile (c.496G>A)?

AlphaMissense predicts likely benign (score 0.1537) — an in-silico prediction, not a clinical call.

CA6 p.Val166Ile

c.496G>A · VCV3483761

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.1537 · ACMG-weighted

gnomAD v4.1

Rare

ultra-rare (popmax 0.0281%, afr)

Missense predictors

0/3 damaging

AlphaMissense, REVEL, SaProt

Computational evidence

Protein change
AlphaMissense	0.1537	likely benign
REVEL	0.057	moderately benign-leaning
SaProt	LLR -6.50	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 -4.1	GERP -2.8
Regional constraint	o/e 0.99	unconstrained · MANE · 29 kb · p 0.8 · regional, not allelic
Overall
CADD	0.025	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.

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.0281% African / African-American · 21/74,602 alleles

Filtering AF 0.0188% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.0158%

Overall 0.00331% 53/1,599,764 alleles · ultra-rare

Ancestry group	Frequency	1 in
African / African-Americangrpmax	0.0281%	3,552
Remaining individualsnot grpmax-eligible	0.00968%	10,335
Admixed American	0.00501%	19,976
European (non-Finnish)	0.00197%	50,749

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: CA6
Protein: p.Val166Ile
Coding: c.496G>A
MANE Select: NM_001215
Type: single nucleotide variant
Location: chr1:8958997 (GRCh38)
Gene constraint: LOEUF 1.218 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 89.49 · 1 PDB
Residue 166: a disulfide bond; the alpha-carbonic anhydrase domain; a β-strand

Full CA6 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Similar variants

CA6 p.Gly70= Benign ★★ same type
CA6 p.Ala33Val Uncertain significance ★ ⚠ same type
CA6 p.Arg255Cys Uncertain significance ★ ⚠ same type
CA6 p.Arg255Ser Uncertain significance ★ ⚠ same type
CA6 p.Arg265Gly Uncertain significance ★ ⚠ same type
CA6 p.Arg305Gly Uncertain significance ★ ⚠ same type
CA6 p.Arg96Gly Uncertain significance ★ ⚠ same type
CA6 p.Asn280Tyr 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/ca6-p-val166ile (accessed [today's date]).

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