Is CPLANE1 p.His3103Arg (c.9308A>G) pathogenic?

CPLANE1 p.His3103Arg (c.9308A>G) is classified Uncertain significance in CPLANE1 (ClinVar, Multiple submitters, 2 submitters; last evaluated 2026-06-30). AlphaMissense: likely benign (0.051); Very rare (popmax 0.00182%, amr).

How common is CPLANE1 p.His3103Arg (c.9308A>G) in the general population?

CPLANE1 p.His3103Arg (c.9308A>G) is very rare (popmax 0.00182%, amr) (gnomAD).

What do computational predictors say about CPLANE1 p.His3103Arg (c.9308A>G)?

AlphaMissense predicts likely benign (score 0.051) — an in-silico prediction, not a clinical call.

CPLANE1 p.His3103Arg

c.9308A>G · rs1274026508 · VCV1945069

Uncertain significance Multiple submitters

Classification

Uncertain significance

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 2 submitters

AlphaMissense

likely benign

0.051 · ACMG-weighted

gnomAD v4.1

Rare

very rare (popmax 0.00182%, amr)

Missense predictors

0/2 damaging

AlphaMissense, REVEL

Computational evidence

Protein change
AlphaMissense	0.051	likely benign
REVEL	0.007	strongly 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 -13	GERP -2.5
Regional constraint	o/e 0.92	unconstrained · MANE · 139 kb · p 2.3e-06 · regional, not allelic
Overall
CADD	0.002	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 H3049R vs ClinVar H3103R) — verify the residue.

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.00182% Admixed American · 1/55,062 alleles

Filtering AF 0.00036% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.000261%

Overall 0.000829% 12/1,447,350 alleles · very rare

Ancestry group	Frequency	1 in
Admixed Americangrpmax	0.00182%	55,062
Remaining individualsnot grpmax-eligible	0.00161%	61,992
African / African-American	0.00135%	73,952
European (non-Finnish)	0.000765%	130,726

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: CPLANE1
Protein: p.His3103Arg
Coding: c.9308A>G
MANE Select: NM_001384732
dbSNP: rs1274026508
Type: single nucleotide variant
Location: chr5:37120218 (GRCh38)
Gene constraint: LOEUF 0.728 · pLI <0.01 · ClinGen HI gene assoc. with recessive phenotype (gnomAD)
Residue 3103: a UniProt-annotated variant site (in ofd6; likely pathogenic)

Full CPLANE1 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Similar variants

CPLANE1 p.His3103Tyr Conflicting classifications of pathogenicity ★ ⚠ same residue
CPLANE1 c.1372-2A>G Pathogenic/Likely pathogenic ★★ same type
CPLANE1 c.2291+1G>A Likely pathogenic ★★ same type
CPLANE1 c.2291+2T>C Pathogenic/Likely pathogenic ★★ same type
CPLANE1 c.2292-1G>A Likely pathogenic ★★ same type
CPLANE1 c.2500+1G>A Likely pathogenic ★★ same type
CPLANE1 c.2920+1G>A Likely pathogenic ★★ same type
CPLANE1 c.3290-2A>G Pathogenic/Likely pathogenic ★★ 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/cplane1-p-his3103arg (accessed [today's date]).

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