1-97078076-A-G

Variant summary

Our verdict is Benign. Variant got -14 ACMG points: 0P and 14B. BP4_Strong BP6_Moderate BS1 BS2

The NM_000110.4(DPYD):c.*900T>C variant causes a 3 prime UTR change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0261 in 152,272 control chromosomes in the GnomAD database, including 93 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★).

• Frequency:
  • Genomes: 𝑓 0.026 (93 hom., cov: 33)
  • Failed GnomAD Quality Control
• Consequence: DPYD NM_000110.4 3_prime_UTR
• Clinical Significance: Likely benign criteria provided, single submitter B:1 O:1
• Conservation: PhyloP100: 0.316

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]

ACMG classification

Verdict is Benign. Variant got -14 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.86).
• BP6: Variant 1-97078076-A-G is Benign according to our data. Variant chr1-97078076-A-G is described in ClinVar as [Likely_benign]. Clinvar id is 100063.Status of the report is criteria_provided_single_submitter, 1 stars.
• BS1: Variant frequency is greater than expected in population nfe. gnomad4 allele frequency = 0.0261 (3972/152272) while in subpopulation NFE AF= 0.0339 (2308/68012). AF 95% confidence interval is 0.0328. There are 93 homozygotes in gnomad4. There are 2056 alleles in male gnomad4 subpopulation. Median coverage is 33. This position pass quality control queck.
• BS2: High Homozygotes in GnomAd at 94 AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
DPYD	NM_000110.4	c.*900T>C		3_prime_UTR_variant	23/23	ENST00000370192.8

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
DPYD	ENST00000370192.8	c.*900T>C		3_prime_UTR_variant	23/23	1	NM_000110.4	P1

Frequencies

GnomAD3 genomes AF: 0.0261 AC: 3975 AN: 152154 Hom.: 94 Cov.: 33

Gnomad AFR AF: 0.00615

Gnomad AMI AF: 0.00110

Gnomad AMR AF: 0.0153

Gnomad ASJ AF: 0.0199

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00373

Gnomad FIN AF: 0.0980

Gnomad MID AF: 0.0190

Gnomad NFE AF: 0.0340

Gnomad OTH AF: 0.0211

GnomAD4 exome Data not reliable, filtered out with message: AC0 AC: 0 AN: 0 Hom.: 0 Cov.: 0 AC XY: 0 AN XY: 0

GnomAD4 genome AF: 0.0261 AC: 3972 AN: 152272 Hom.: 93 Cov.: 33 AF XY: 0.0276 AC XY: 2056 AN XY: 74448

Gnomad4 AFR AF: 0.00613

Gnomad4 AMR AF: 0.0152

Gnomad4 ASJ AF: 0.0199

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.00373

Gnomad4 FIN AF: 0.0980

Gnomad4 NFE AF: 0.0339

Gnomad4 OTH AF: 0.0209

Alfa AF: 0.0299 Hom.: 101

Bravo AF: 0.0188

Asia WGS AF: 0.00318 AC: 11 AN: 3472

ClinVar

Significance: Likely benign

Submissions summary: Benign:1 Other:1

Revision: criteria provided, single submitter

Submissions by phenotype

Dihydropyrimidine dehydrogenase deficiency Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Jan 13, 2018

This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score and internal cut-off values, a variant classified as likely benign is not then subjected to further curation. The score for this variant resulted in a classification of likely benign for this disease. -

not provided Other:1

not provided, no classification provided

literature only

Diasio Lab, Mayo Clinic

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Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.86
Cadd	Benign	1.5
Dann	Benign	0.76

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

LitVar

Other links and lift over

dbSNP: rs17470762; hg19: chr1-97543632;