Is CSMD2 p.Pro1484Ser (c.4450C>T) pathogenic?

CSMD2 p.Pro1484Ser (c.4450C>T) is classified Uncertain significance in CSMD2 (ClinVar, Single submitter, 1 submitter; last evaluated 2022-06-30). AlphaMissense: likely benign (0.2155); Very rare (popmax 0.00333%, amr).

How common is CSMD2 p.Pro1484Ser (c.4450C>T) in the general population?

CSMD2 p.Pro1484Ser (c.4450C>T) is very rare (popmax 0.00333%, amr) (gnomAD).

What do computational predictors say about CSMD2 p.Pro1484Ser (c.4450C>T)?

AlphaMissense predicts likely benign (score 0.2155) — an in-silico prediction, not a clinical call.

CSMD2 p.Pro1484Ser

c.4450C>T · rs368646887 · VCV2226548

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.2155 · ACMG-weighted

gnomAD v4.1

Rare

very rare (popmax 0.00333%, amr)

Missense predictors

0/2 damaging

AlphaMissense, REVEL

Computational evidence

Protein change
AlphaMissense	0.2155	likely benign
REVEL	0.279	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 7.6	GERP 1.6, phastCons 1
Regional constraint	o/e 0.78	unconstrained · MANE · 331 kb · p 5.5e-29 · regional, not allelic
Overall
CADD	23.6	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.

⚠ Isoform check: AlphaMissense numbered on a different transcript (AM P1444S vs ClinVar P1484S) — verify the residue.

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.00333% Admixed American · 2/59,996 alleles

Filtering AF 0.000615% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.000474%

Overall 0.00105% 17/1,613,768 alleles · very rare

Ancestry group	Frequency	1 in
Admixed Americangrpmax	0.00333%	29,998
Remaining individualsnot grpmax-eligible	0.0016%	62,484
African / African-American	0.00133%	74,922
European (non-Finnish)	0.0011%	90,754

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: CSMD2
Protein: p.Pro1484Ser
Coding: c.4450C>T
MANE Select: NM_001281956
dbSNP: rs368646887
Type: single nucleotide variant
Location: chr1:33652459 (GRCh38)
Gene constraint: LOEUF 0.364 · pLI 1.00 (gnomAD)
Residue 1484: the cub 9 domain

Full CSMD2 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Similar variants

CSMD2 p.Pro1506= Likely benign ★★ same type
CSMD2 p.Ser3015= Benign ★★ same type
CSMD2 c.404+2T>A Uncertain significance ★ same type
CSMD2 c.6344-398G>T Uncertain significance ★ same type
CSMD2 c.6344-422A>G Uncertain significance ★ same type
CSMD2 c.6344-423T>C Uncertain significance ★ same type
CSMD2 c.6344-429G>A Uncertain significance ★ same type
CSMD2 c.6344-435G>A 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/csmd2-p-pro1484ser (accessed [today's date]).

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