Genetic Variant DPYD:p.Asp974Ala (chr1-97079133-T-G) – ACMG Classification: Likely_pathogenic (6 pts)

Variant summary

Our verdict is Likely pathogenic. The variant received 6 ACMG points: 6P and 0B. PM2PM5PP3_Moderate

The NM_000110.4(DPYD):c.2921A>C(p.Asp974Ala) variant causes a missense change. The variant allele was found at a frequency of 0.000000684 in 1,461,294 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. D974V) has been classified as Pathogenic.

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 6.8e-7 ( 0 hom. )

Consequence

DPYD
NM_000110.4 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 6.21

Publications

4 publications found

Variant links:

Genes affected

DPYD (HGNC:3012): (dihydropyrimidine dehydrogenase) The protein encoded by this gene is a pyrimidine catabolic enzyme and the initial and rate-limiting factor in the pathway of uracil and thymidine catabolism. Mutations in this gene result in dihydropyrimidine dehydrogenase deficiency, an error in pyrimidine metabolism associated with thymine-uraciluria and an increased risk of toxicity in cancer patients receiving 5-fluorouracil chemotherapy. Two transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, May 2009]

DPYD Gene-Disease associations (from GenCC):

dihydropyrimidine dehydrogenase deficiency
Inheritance: AR Classification: DEFINITIVE Submitted by: G2P

DPYD links:

ENSG00000296260 (HGNC:):

ENSG00000296260 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Likely_pathogenic. The variant received 6 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PM5

Other missense variant is known to change same aminoacid residue: Variant chr1-97079133-T-A is described in ClinVar as Pathogenic. ClinVar VariationId is 433.Status of the report is no_assertion_criteria_provided, 0 stars.

PP3

MetaRNN computational evidence supports a deleterious effect, 0.853

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_000110.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	DPYD	NM_000110.4	MANE Select	c.2921A>C	p.Asp974Ala	missense	Exon 23 of 23	NP_000101.2

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	DPYD	ENST00000370192.8	TSL:1 MANE Select	c.2921A>C	p.Asp974Ala	missense	Exon 23 of 23	ENSP00000359211.3
	ENSG00000296260	ENST00000737657.1		n.550-2614T>G		intron	N/A

Frequencies

GnomAD3 genomes

Cov.:

GnomAD2 exomes

AF:

0.00000398

AC:

AN:

251342

AF XY:

0.00

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00000880

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

6.84e-7

AC:

AN:

1461294

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

726972

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33446

American (AMR)

AF:

0.00

AC:

AN:

44700

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26104

East Asian (EAS)

AF:

0.00

AC:

AN:

39692

South Asian (SAS)

AF:

0.00

AC:

AN:

86248

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53420

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5714

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

1111606

Other (OTH)

AF:

0.0000166

AC:

AN:

60364

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.475

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

Cov.:

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.21

BayesDel_addAF

Pathogenic

0.20

BayesDel_noAF

Uncertain

0.050

CADD

Pathogenic

(source)

DANN

Uncertain

1.0

DEOGEN2

Benign

0.37

Eigen

Pathogenic

0.74

Eigen_PC

Pathogenic

0.71

FATHMM_MKL

Pathogenic

0.97

LIST_S2

Uncertain

0.93

M_CAP

Uncertain

0.12

MetaRNN

Pathogenic

0.85

MetaSVM

Pathogenic

0.81

MutationAssessor

Benign

1.4

PhyloP100

6.2

PrimateAI

Uncertain

0.61

PROVEAN

Pathogenic

-7.0

REVEL

Pathogenic

0.78

Sift

Uncertain

0.0090

Sift4G

Uncertain

0.0020

Polyphen

0.99

Vest4

0.70

MutPred

0.67

Loss of solvent accessibility (P = 0.0561)

MVP

0.97

MPC

0.075

ClinPred

0.96

GERP RS

5.5

Varity_R

0.63

gMVP

0.86

Mutation Taster

=43/57

disease causing

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.020

Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over