Is CACTIN p.Arg150Trp (c.448C>T) pathogenic?

CACTIN p.Arg150Trp (c.448C>T) is classified Uncertain significance in CACTIN (ClinVar, Single submitter, 1 submitter; last evaluated 2023-05-08). AlphaMissense: likely benign (0.1501); Very rare (popmax 0.00769%, sas).

How common is CACTIN p.Arg150Trp (c.448C>T) in the general population?

CACTIN p.Arg150Trp (c.448C>T) is very rare (popmax 0.00769%, sas) (gnomAD).

What do computational predictors say about CACTIN p.Arg150Trp (c.448C>T)?

AlphaMissense predicts likely benign (score 0.1501) — an in-silico prediction, not a clinical call.

CACTIN p.Arg150Trp

c.448C>T · rs745506756 · VCV2561568

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.1501 · ACMG-weighted

gnomAD v4.1

Rare

very rare (popmax 0.00769%, sas)

Missense predictors

1/3 damaging

AlphaMissense, REVEL, SaProt

Computational evidence

Protein change
AlphaMissense	0.1501	likely benign
REVEL	0.167	moderately benign-leaning
SaProt	LLR -11.97	damaging
⇒ SaProt calls this damaging; AlphaMissense and REVEL do not.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 4.6	GERP 0.52, phastCons 1
Regional constraint	o/e 1.07	unconstrained · MANE · 2,909 bp · p 0.27 · regional, not allelic
Overall
CADD	26.4	PHRED · no single calibrated threshold — expert panels disagree

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

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.00769% South Asian · 7/91,076 alleles

Filtering AF 0.00359% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.00255%

Overall 0.00174% 28/1,607,412 alleles · very rare

Ancestry group	Frequency	1 in
South Asiangrpmax	0.00769%	13,011
European (non-Finnish)	0.00161%	62,093
Remaining individualsnot grpmax-eligible	0.0016%	62,338
African / African-American	0.00133%	74,936

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: CACTIN
Protein: p.Arg150Trp
Coding: c.448C>T
MANE Select: NM_001080543
dbSNP: rs745506756
Type: single nucleotide variant
Location: chr19:3623882 (GRCh38)
Gene constraint: LOEUF 0.465 · pLI 1.00 (gnomAD)
Structure: AlphaFold pLDDT 69.52 · 6 PDB

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

Similar variants

CACTIN p.Ala100Ser Uncertain significance ★ ⚠ same type
CACTIN p.Ala119Val Uncertain significance ★ ⚠ same type
CACTIN p.Ala130Ser Uncertain significance ★ ⚠ same type
CACTIN p.Ala131Val Uncertain significance ★ ⚠ same type
CACTIN p.Ala317Thr Uncertain significance ★ ⚠ same type
CACTIN p.Ala427Thr Uncertain significance ★ ⚠ same type
CACTIN p.Ala500Val Uncertain significance ★ ⚠ same type
CACTIN p.Arg102Gln 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/cactin-p-arg150trp (accessed [today's date]).

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