Is C1QL4 p.Pro149Ser (c.445C>T) pathogenic?

C1QL4 p.Pro149Ser (c.445C>T) is classified Uncertain significance in C1QL4 (ClinVar, Single submitter, 1 submitter; last evaluated 2023-12-19). AlphaMissense: likely benign (0.205); Ultra-rare (popmax 0.0317%, amr).

How common is C1QL4 p.Pro149Ser (c.445C>T) in the general population?

C1QL4 p.Pro149Ser (c.445C>T) is ultra-rare (popmax 0.0317%, amr) (gnomAD).

What do computational predictors say about C1QL4 p.Pro149Ser (c.445C>T)?

AlphaMissense predicts likely benign (score 0.205) — an in-silico prediction, not a clinical call.

C1QL4 p.Pro149Ser

c.445C>T · rs1218511321 · VCV3135734

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.205 · ACMG-weighted

gnomAD v4.1

Rare

ultra-rare (popmax 0.0317%, amr)

Missense predictors

0/3 damaging

AlphaMissense, REVEL, SaProt

Computational evidence

Protein change
AlphaMissense	0.205	likely benign
REVEL	0.173	moderately benign-leaning
SaProt	LLR -8.37	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 12	GERP -0.65, phastCons 1
Regional constraint	o/e 1.01	unconstrained · MANE · 3,420 bp · p 0.78 · regional, not allelic
Overall
CADD	21.7	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 0.0317% Admixed American · 19/59,914 alleles

Filtering AF 0.0207% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.0172%

Overall 0.00149% 24/1,611,712 alleles · ultra-rare

Ancestry group	Frequency	1 in
Admixed Americangrpmax	0.0317%	3,153
Remaining individualsnot grpmax-eligible	0.00642%	15,576
African / African-American	0.00134%	74,870

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: C1QL4
Protein: p.Pro149Ser
Coding: c.445C>T
MANE Select: NM_001008223
dbSNP: rs1218511321
Type: single nucleotide variant
Location: chr12:49336033 (GRCh38)
Gene constraint: LOEUF 0.893 · pLI 0.27 (gnomAD)
Structure: AlphaFold pLDDT 81.51
Residue 149: the c1q domain

Full C1QL4 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Similar variants

C1QL4 p.Ala114Gly Uncertain significance ★ ⚠ same type
C1QL4 p.Ala114Val Uncertain significance ★ ⚠ same type
C1QL4 p.Ala141Glu Uncertain significance ★ ⚠ same type
C1QL4 p.Ala182Asp Uncertain significance ★ ⚠ same type
C1QL4 p.Arg109Cys Uncertain significance ★ ⚠ same type
C1QL4 p.Arg17His Uncertain significance ★ ⚠ same type
C1QL4 p.Arg38His Uncertain significance ★ ⚠ same type
C1QL4 p.Arg38Leu 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/c1ql4-p-pro149ser (accessed [today's date]).

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