Is CASKIN2 p.Arg623Trp (c.1867C>T) pathogenic?

CASKIN2 p.Arg623Trp (c.1867C>T) is classified Uncertain significance in CASKIN2 (ClinVar, Single submitter, 1 submitter; last evaluated 2025-10-29). AlphaMissense: likely benign (0.1932); Ultra-rare (popmax 0.065%, eas).

How common is CASKIN2 p.Arg623Trp (c.1867C>T) in the general population?

CASKIN2 p.Arg623Trp (c.1867C>T) is ultra-rare (popmax 0.065%, eas) (gnomAD).

What do computational predictors say about CASKIN2 p.Arg623Trp (c.1867C>T)?

AlphaMissense predicts likely benign (score 0.1932) — an in-silico prediction, not a clinical call.

CASKIN2 p.Arg623Trp

c.1867C>T · rs200961448 · VCV3137530

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.1932 · ACMG-weighted

gnomAD v4.1

Rare

ultra-rare (popmax 0.065%, eas)

Missense predictors

1/2 damaging

AlphaMissense, SaProt · REVEL no call

Computational evidence

Protein change
AlphaMissense	0.1932	likely benign
REVEL	0.46	indeterminate
SaProt	LLR -12.20	damaging
⇒ SaProt calls this damaging; AlphaMissense does not; REVEL makes no call.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 7.2	GERP 1.5, phastCons 1
Regional constraint	o/e 1.00	unconstrained · MANE · 4,779 bp · p 1 · regional, not allelic
Overall
CADD	33.0	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 0.065% East Asian · 29/44,632 alleles

Filtering AF 0.0464% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.0402%

Overall 0.00451% 72/1,595,344 alleles · ultra-rare

Ancestry group	Frequency	1 in
East Asiangrpmax	0.065%	1,539
African / African-American	0.012%	8,307
Admixed American	0.00854%	11,705
Remaining individualsnot grpmax-eligible	0.00324%	30,891
South Asian	0.00223%	44,794
European (non-Finnish)	0.00213%	46,943

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: CASKIN2
Protein: p.Arg623Trp
Coding: c.1867C>T
MANE Select: NM_020753
dbSNP: rs200961448
Type: single nucleotide variant
Location: chr17:75503207 (GRCh38)
Gene constraint: LOEUF 0.524 · pLI 0.41 (gnomAD)
Structure: AlphaFold pLDDT 58.59 · 4 PDB
Residue 623: an α-helix

Full CASKIN2 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Similar variants

CASKIN2 c.1467+8C>A Benign ★★ same type
CASKIN2 p.Ala1005Glu Uncertain significance ★ ⚠ same type
CASKIN2 p.Ala1005Thr Uncertain significance ★ ⚠ same type
CASKIN2 p.Ala1087Gly Uncertain significance ★ ⚠ same type
CASKIN2 p.Ala1087Val Uncertain significance ★ ⚠ same type
CASKIN2 p.Ala1088Thr Uncertain significance ★ ⚠ same type
CASKIN2 p.Ala111Thr Uncertain significance ★ ⚠ same type
CASKIN2 p.Ala1120Val 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/caskin2-p-arg623trp (accessed [today's date]).

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