Is CLEC18B p.Ala115Val (c.344C>T) pathogenic?

CLEC18B p.Ala115Val (c.344C>T) is classified Uncertain significance in CLEC18B (ClinVar, Single submitter, 1 submitter; last evaluated 2025-03-31). AlphaMissense: likely benign (0.0802); Ultra-rare (popmax 0.0333%, afr).

How common is CLEC18B p.Ala115Val (c.344C>T) in the general population?

CLEC18B p.Ala115Val (c.344C>T) is ultra-rare (popmax 0.0333%, afr) (gnomAD).

What do computational predictors say about CLEC18B p.Ala115Val (c.344C>T)?

AlphaMissense predicts likely benign (score 0.0802) — an in-silico prediction, not a clinical call.

CLEC18B p.Ala115Val

c.344C>T · VCV4003518

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.0802 · ACMG-weighted

gnomAD v4.1

Rare

ultra-rare (popmax 0.0333%, afr)

Missense predictors

0/3 damaging

AlphaMissense, REVEL, SaProt

Computational evidence

Protein change
AlphaMissense	0.0802	likely benign
REVEL	0.039	moderately benign-leaning
SaProt	LLR -7.71	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 -4.7	GERP -3.4
Regional constraint	o/e 0.13	constrained · MANE · 5,109 bp · p 3.9e-24 · regional, not allelic
Overall
CADD	0.003	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 0.0333% African / African-American · 23/69,160 alleles

Filtering AF 0.0227% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.0192%

Overall 0.00467% 74/1,583,642 alleles · ultra-rare

Ancestry group	Frequency	1 in
African / African-Americangrpmax	0.0333%	3,007
Remaining individualsnot grpmax-eligible	0.00811%	12,325
Admixed American	0.00553%	18,085
Ashkenazi Jewishnot grpmax-eligible	0.00343%	29,114
European (non-Finnish)	0.00334%	29,906
South Asian	0.00333%	30,006

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: CLEC18B
Protein: p.Ala115Val
Coding: c.344C>T
MANE Select: NM_001385193
Type: single nucleotide variant
Location: chr16:74418171 (GRCh38)
Gene constraint: LOEUF 0.34 · pLI 1.00 (gnomAD)
Structure: AlphaFold pLDDT 79.28
Residue 115: the scp domain

Full CLEC18B gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Similar variants

CLEC18B c.1212-212G>T Uncertain significance ★ ⚠ same type
CLEC18B p.Ala137Ser Uncertain significance ★ ⚠ same type
CLEC18B p.Ala137Thr Uncertain significance ★ ⚠ same type
CLEC18B p.Ala137Val Uncertain significance ★ ⚠ same type
CLEC18B p.Ala19Asp Uncertain significance ★ ⚠ same type
CLEC18B p.Ala202Val Uncertain significance ★ ⚠ same type
CLEC18B p.Ala66Glu Uncertain significance ★ ⚠ same type
CLEC18B p.Ala84Thr 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/clec18b-p-ala115val (accessed [today's date]).

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