Is DPYD p.Ile15= (c.45C>A) pathogenic?

DPYD p.Ile15= (c.45C>A) is classified Likely benign in DPYD (ClinVar, No assertion criteria, 1 submitter; last evaluated 2017-02-27). Very rare (popmax 0.0011%, sas); Associated with dihydropyrimidine dehydrogenase deficiency.

What condition is associated with DPYD p.Ile15= (c.45C>A)?

DPYD p.Ile15= (c.45C>A) is associated with dihydropyrimidine dehydrogenase deficiency (ClinVar).

How common is DPYD p.Ile15= (c.45C>A) in the general population?

DPYD p.Ile15= (c.45C>A) is very rare (popmax 0.0011%, sas) (gnomAD).

How is Dihydropyrimidine dehydrogenase deficiency inherited?

Typically Autosomal recessive (Orphanet). A genetic counselor can assess individual risk for a family.

DPYD p.Ile15=

c.45C>A · rs267598790 · VCV550879

Likely benign No assertion criteria

Classification

Likely benign

ClinVar

Review

No assertion criteria ☆☆☆☆

ClinVar · 1 submitter

gnomAD v4.1

Rare

very rare (popmax 0.0011%, sas)

Conditions

dihydropyrimidine dehydrogenase deficiency

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 3.4	GERP 0.28, phastCons 1
Overall
CADD	9.121	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.0011% South Asian · 1/90,834 alleles

Overall 0.000657% 1/152,138 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: DPYD
Protein: p.Ile15=
Coding: c.45C>A
MANE Select: NM_000110
dbSNP: rs267598790
Type: single nucleotide variant
Location: chr1:97883369 (GRCh38)
Gene constraint: LOEUF 1.09 · pLI <0.01 · ClinGen HI gene assoc. with recessive phenotype (gnomAD)
Structure: AlphaFold pLDDT 96.23

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

Disease context

dihydropyrimidine dehydrogenase deficiency — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

For Dihydropyrimidine dehydrogenase deficiency (Orphanet):

Inheritance: Autosomal recessive
Onset: All ages

Similar variants

DPYD c.1340-2A>C Likely pathogenic ★★ same condition
DPYD c.1905+1G>C Pathogenic/Likely pathogenic ★★ same condition
DPYD c.233+1G>T Likely pathogenic ★★ same condition
DPYD c.2622+1G>A Likely pathogenic ★★ same condition
DPYD c.2767-1G>A Likely pathogenic ★★ same condition
DPYD c.680+1G>T Likely pathogenic ★★ same condition
DPYD p.Arg21Ter Pathogenic/Likely pathogenic ★★ same condition
DPYD p.Arg561Ter Pathogenic/Likely pathogenic ★★ 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/dpyd-p-ile15 (accessed [today's date]).

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