Is CD40 p.Asp84= (c.252C>T) pathogenic?

CD40 p.Asp84= (c.252C>T) is classified Likely benign in CD40 (ClinVar, Single submitter, 1 submitter; last evaluated 2026-01-19). Very rare (popmax 0.00988%, sas).

How common is CD40 p.Asp84= (c.252C>T) in the general population?

CD40 p.Asp84= (c.252C>T) is very rare (popmax 0.00988%, sas) (gnomAD).

CD40 p.Asp84=

c.252C>T · rs748382649 · VCV3006276

Likely benign Single submitter

Classification

Likely benign

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

gnomAD v4.1

Rare

very rare (popmax 0.00988%, sas)

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 0.48	GERP 0.44, phastCons 0.75
Overall
CADD	8.934	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.00988% South Asian · 9/91,084 alleles

Filtering AF 0.00514% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.00375%

Overall 0.00062% 10/1,614,070 alleles · very rare

Ancestry group	Frequency	1 in
South Asiangrpmax	0.00988%	10,120
Remaining individualsnot grpmax-eligible	0.0016%	62,484

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: CD40
Protein: p.Asp84=
Coding: c.252C>T
MANE Select: NM_001250
dbSNP: rs748382649
Type: single nucleotide variant
Location: chr20:46122354 (GRCh38)
Gene constraint: LOEUF 0.677 · pLI 0.03 (gnomAD)
Structure: AlphaFold pLDDT 81.10 · 14 PDB
Residue 84: a disulfide bond

Full CD40 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Similar variants

CD40 c.256+5G>A Uncertain significance ★★ same type
CD40 c.*178G>A Uncertain significance ★★ same type
CD40 c.*547A>T Uncertain significance ★★ same type
CD40 p.Ala25Ser Uncertain significance ★★ ⚠ same type
CD40 p.Arg123His Uncertain significance ★★ ⚠ same type
CD40 p.Asn180Lys Uncertain significance ★★ ⚠ same type
CD40 p.Glu159Lys Uncertain significance ★★ ⚠ same type
CD40 p.Ile204Val 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/cd40-p-asp84 (accessed [today's date]).

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