Is CD38 p.Asp256His (c.766G>C) pathogenic?

CD38 p.Asp256His (c.766G>C) is classified Uncertain significance in CD38 (ClinVar, Single submitter, 1 submitter; last evaluated 2023-05-30). AlphaMissense: likely benign (0.2307); Very rare (popmax 0.00447%, eas).

How common is CD38 p.Asp256His (c.766G>C) in the general population?

CD38 p.Asp256His (c.766G>C) is very rare (popmax 0.00447%, eas) (gnomAD).

What do computational predictors say about CD38 p.Asp256His (c.766G>C)?

AlphaMissense predicts likely benign (score 0.2307) — an in-silico prediction, not a clinical call.

CD38 p.Asp256His

c.766G>C · rs768378089 · VCV2552787

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.2307 · ACMG-weighted

gnomAD v4.1

Rare

very rare (popmax 0.00447%, eas)

Missense predictors

0/3 damaging

AlphaMissense, REVEL, SaProt

Computational evidence

Protein change
AlphaMissense	0.2307	likely benign
REVEL	0.144	moderately benign-leaning
SaProt	LLR -6.97	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 -2.4	GERP -3.6
Regional constraint	o/e 1.02	unconstrained · MANE · 70 kb · p 0.67 · regional, not allelic
Overall
CADD	10.09	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 0.00447% East Asian · 2/44,784 alleles

Filtering AF 0.00074% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.000277%

Overall 0.000125% 2/1,601,100 alleles · very rare

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: CD38
Protein: p.Asp256His
Coding: c.766G>C
MANE Select: NM_001775
dbSNP: rs768378089
Type: single nucleotide variant
Location: chr4:15840465 (GRCh38)
Gene constraint: LOEUF 1.292 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 91.09 · 56 PDB
Residue 256: a disulfide bond

Full CD38 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Similar variants

CD38 p.Asp256Glu Likely benign ★ ⚠ same residue
CD38 p.Tyr70= Benign ★★ same type
CD38 c.752+2T>C Uncertain significance ★ same type
CD38 p.Ala154Val Uncertain significance ★ ⚠ same type
CD38 p.Arg17Trp Uncertain significance ★ ⚠ same type
CD38 p.Arg194Cys Uncertain significance ★ ⚠ same type
CD38 p.Arg195Gly Uncertain significance ★ ⚠ same type
CD38 p.Asn169Ser 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/cd38-p-asp256his (accessed [today's date]).

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