rs1801268

Variant names:

Your query was ambiguous. Multiple possible variants found:

Variant summary

Our verdict is Likely pathogenic. The variant received 6 ACMG points: 6P and 0B. PM2PP3_Strong

The NM_000110.4(DPYD):c.2983G>T(p.Val995Phe) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00000274 in 1,461,536 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as drug response (★★★).

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 0.0000027 ( 0 hom. )

Consequence

DPYD
NM_000110.4 missense

Scores

Clinical Significance

drug response reviewed by expert panel P:1O:1

Conservation

PhyloP100: 7.84

Publications

28 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;

PP3

MetaRNN computational evidence supports a deleterious effect, 0.944

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
DPYD	NM_000110.4 link	c.2983G>T	p.Val995Phe	missense_variant	Exon 23 of 23	ENST00000370192.8	NP_000101.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
DPYD	ENST00000370192.8 link	c.2983G>T	p.Val995Phe	missense_variant	Exon 23 of 23	1	NM_000110.4	ENSP00000359211.3
ENSG00000296260	ENST00000737657.1 link	n.550-2676C>A		intron_variant	Intron 1 of 1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

0.00000274

AC:

AN:

1461536

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

727088

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33454

American (AMR)

AF:

0.00

AC:

AN:

44714

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26120

East Asian (EAS)

AF:

0.00

AC:

AN:

39694

South Asian (SAS)

AF:

0.00

AC:

AN:

86250

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53420

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

0.00000270

AC:

AN:

1111736

Other (OTH)

AF:

0.0000166

AC:

AN:

60380

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.:

Alfa

AF:

0.00000248

Hom.:

Bravo

AF:

0.00000378

EpiCase

AF:

0.0000546

EpiControl

AF:

0.00

ClinVar

Significance: drug response

Submissions summary: Pathogenic:1Other:1

Revision: reviewed by expert panel

LINK: link

Submissions by phenotype

Dihydropyrimidine dehydrogenase deficiency

Pathogenic:1

Nov 21, 2023

Women's Health and Genetics/Laboratory Corporation of America, LabCorp

Significance:Likely pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Variant summary: DPYD c.2983G>T (p.Val995Phe) results in a non-conservative amino acid change located in the 4Fe-4S ferredoxin-type, iron-sulphur binding domain (IPR017896) of the encoded protein sequence. Five of five in-silico tools predict a damaging effect of the variant on protein function. The variant was absent in 251376 control chromosomes (gnomAD). c.2983G>T has been reported in the literature in the homozygous state in an individual affected with Dihydropyrimidine Dehydrogenase Deficiency (Vreken_1998). At least two publications report experimental evidence evaluating an impact on protein function and found that the variant results in <12.5% enzymatic activity compared to the WT protein (e.g. Vreken_1998, Offer_2014). The following publications have been ascertained in the context of this evaluation (PMID: 24648345, 9686374). Based on the evidence outlined above, the variant was classified as likely pathogenic. -

fluorouracil response - Other

Other:1

Mar 24, 2021

PharmGKB

Significance:drug response

Review Status:reviewed by expert panel

Collection Method:curation

PharmGKB Level of Evidence 1A: Level 1A clinical annotations describe variant-drug combinations that have variant-specific prescribing guidance available in a current clinical guideline annotation or an FDA-approved drug label annotation. Annotations of drug labels or clinical guidelines must give prescribing guidance for specific variants (e.g. CYP2C9*3, HLA-B*57:01) or provide mapping from defined allele functions to diplotypes and phenotypes to be used as supporting evidence for a level 1A clinical annotation. Level 1A clinical annotations must also be supported by at least one publication in addition to a clinical guideline or drug label with variant-specific prescribing guidance. Drug-variant association: Other

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.64

BayesDel_addAF

Pathogenic

0.48

BayesDel_noAF

Pathogenic

0.45

CADD

Pathogenic

(source)

DANN

Uncertain

1.0

DEOGEN2

Uncertain

0.46

Eigen

Pathogenic

0.79

Eigen_PC

Pathogenic

0.79

FATHMM_MKL

Pathogenic

0.99

LIST_S2

Pathogenic

0.99

M_CAP

Uncertain

0.16

MetaRNN

Pathogenic

0.94

MetaSVM

Uncertain

0.79

MutationAssessor

Uncertain

2.2

PhyloP100

7.8

PrimateAI

Uncertain

0.66

PROVEAN

Pathogenic

-4.4

REVEL

Pathogenic

0.95

Sift

Pathogenic

0.0

Sift4G

Pathogenic

0.0010

Polyphen

1.0

Vest4

0.93

MutPred

0.77

Loss of catalytic residue at V995 (P = 0.1281);

MVP

1.0

MPC

0.40

ClinPred

1.0

GERP RS

5.5

Varity_R

0.92

gMVP

0.95

Mutation Taster

=12/88

disease causing

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.0

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

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over