Is CPLANE2 p.Arg188Gln (c.563G>A) pathogenic?

CPLANE2 p.Arg188Gln (c.563G>A) is classified Uncertain significance in CPLANE2 (ClinVar, Single submitter, 1 submitter; last evaluated 2025-12-02). AlphaMissense: likely benign (0.0799); Low-frequency (popmax 1.12%, mid).

How common is CPLANE2 p.Arg188Gln (c.563G>A) in the general population?

CPLANE2 p.Arg188Gln (c.563G>A) is low-frequency (popmax 1.12%, mid) (gnomAD).

What do computational predictors say about CPLANE2 p.Arg188Gln (c.563G>A)?

AlphaMissense predicts likely benign (score 0.0799) — an in-silico prediction, not a clinical call.

CPLANE2 p.Arg188Gln

c.563G>A · rs201038756 · VCV3076708

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.0799 · ACMG-weighted

gnomAD v4.1

Rare

low-frequency (popmax 1.12%, mid)

Missense predictors

0/3 damaging

AlphaMissense, REVEL, SaProt

Computational evidence

Protein change
AlphaMissense	0.0799	likely benign
REVEL	0.063	moderately benign-leaning
SaProt	LLR -6.23	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 2.7	phastCons 0.99
Regional constraint	o/e 0.93	unconstrained · MANE · 4,691 bp · p 0.18 · regional, not allelic
Overall
CADD	18.88	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 1.12% Middle Eastern · 68/6,056 alleles

Filtering AF 0.909% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.83%

Overall 0.0139% 223/1,609,700 alleles · low-frequency

Ancestry group	Frequency	1 in
Middle Easterngrpmax	1.12%	89
Ashkenazi Jewishnot grpmax-eligible	0.0643%	1,555
Remaining individualsnot grpmax-eligible	0.0321%	3,119
South Asian	0.0132%	7,570
Admixed American	0.00837%	11,952
European (non-Finnish)	0.00789%	12,682
African / African-American	0.00666%	15,008
Finnishnot grpmax-eligible	0.00164%	60,930

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: CPLANE2
Protein: p.Arg188Gln
Coding: c.563G>A
MANE Select: NM_030907
dbSNP: rs201038756
Type: single nucleotide variant
Location: chr1:16232262 (GRCh38)
Gene constraint: LOEUF 1.649 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 90.38
Residue 188: the 'small gtpase-like' region

Full CPLANE2 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Similar variants

CPLANE2 p.Arg188Trp Uncertain significance ★ ⚠ same residue
CPLANE2 p.Arg106Cys Uncertain significance ★ ⚠ same type
CPLANE2 p.Arg106His Uncertain significance ★ ⚠ same type
CPLANE2 p.Arg111Cys Uncertain significance ★ ⚠ same type
CPLANE2 p.Arg148Cys Uncertain significance ★ ⚠ same type
CPLANE2 p.Arg160Cys Uncertain significance ★ ⚠ same type
CPLANE2 p.Arg160His Uncertain significance ★ ⚠ same type
CPLANE2 p.Arg203Gln 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/cplane2-p-arg188gln (accessed [today's date]).

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