Is CUL4B p.Arg315= (c.945G>A) pathogenic?

CUL4B p.Arg315= (c.945G>A) is classified Likely benign in CUL4B (ClinVar, No assertion criteria, 1 submitter; last evaluated 2022-09-20). Very rare (popmax 0.000336%, nfe); Associated with CUL4B-related disorder.

What condition is associated with CUL4B p.Arg315= (c.945G>A)?

CUL4B p.Arg315= (c.945G>A) is associated with CUL4B-related disorder (ClinVar).

How common is CUL4B p.Arg315= (c.945G>A) in the general population?

CUL4B p.Arg315= (c.945G>A) is very rare (popmax 0.000336%, nfe) (gnomAD).

CUL4B p.Arg315=

c.945G>A · VCV3354447

Likely benign No assertion criteria

Classification

Likely benign

ClinVar

Review

No assertion criteria ☆☆☆☆

ClinVar · 1 submitter

gnomAD v4.1

Rare

very rare (popmax 0.000336%, nfe)

Conditions

CUL4B-related disorder

Computational evidence

Protein change
Missense predictors do not apply to this variant type; conservation carries the signal.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 0.82	GERP -3.1, phastCons 1
Overall
CADD	7.902	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.000336% European (non-Finnish) · 3/891,738 alleles

Filtering AF 9e-05% ClinGen BA1/BS1 input FAF95, joint · FAF99 2.5e-05%

Overall 0.000249% 3/1,205,493 alleles · very rare exomes 1/1,094,305 · genomes 2/111,188 · joint denominator

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: CUL4B
Protein: p.Arg315=
Coding: c.945G>A
MANE Select: NM_001079872
Type: single nucleotide variant
Location: chrX:120544619 (GRCh38)
Structure: AlphaFold pLDDT 80.02 · 5 PDB
Residue 315: a turn

Full CUL4B gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

CUL4B-related disorder

Similar variants

CUL4B c.1852+1G>T Pathogenic ★ same condition
CUL4B c.2267-2A>G Likely pathogenic ★ same condition
CUL4B p.Ile318Ser Uncertain significance ★ ⚠ same condition
CUL4B p.Ser456Phe Uncertain significance ★ ⚠ same condition
CUL4B p.Glu221Asp Uncertain significance ⚠ same condition
CUL4B p.Lys782Arg Uncertain significance ⚠ same condition
CUL4B p.Pro681Leu Uncertain significance ⚠ same condition
CUL4B p.Pro78Ala Uncertain significance ⚠ same condition

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/cul4b-p-arg315 (accessed [today's date]).

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