2-241684718-CAACATT-C

Position:

• chr2-241684718-CAACATT-C

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 2P and 1B. PM2 BP3

The NM_001320904.2(DTYMK):​c.265_270delAATGTT​(p.Asn89_Val90del) variant causes a conservative inframe deletion change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000386 in 466,324 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: 𝑓 0.000033 (0 hom., cov: 32)
  • Exomes 𝑓: 0.000041 (0 hom.)
• Consequence: DTYMK NM_001320904.2 conservative_inframe_deletion
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 1.15

Genes affected

DTYMK (HGNC:3061): (deoxythymidylate kinase) Enables thymidylate kinase activity. Predicted to be involved in dTDP biosynthetic process; dTTP biosynthetic process; and dUDP biosynthetic process. Predicted to act upstream of or within cellular response to growth factor stimulus and nucleotide biosynthetic process. Predicted to be located in mitochondrial intermembrane space and mitochondrial matrix. Predicted to be active in cytosol; mitochondrion; and nucleus. [provided by Alliance of Genome Resources, Apr 2022]

DTYMK (HGNC:):

ACMG classification

Verdict is Uncertain_significance. Variant got 1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP3: Nonframeshift variant in repetitive region in NM_001320904.2

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
DTYMK	NM_012145.4	c.239+1045_239+1050delAATGTT		intron_variant		ENST00000305784.7	NP_036277.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
DTYMK	ENST00000305784.7	c.239+1045_239+1050delAATGTT		intron_variant		1	NM_012145.4	ENSP00000304802.2

Frequencies

GnomAD3 genomes AF: 0.0000329 AC: 5 AN: 152038 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.0000726

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.0000655

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.0000147

Gnomad OTH AF: 0.00

GnomAD4 exome AF: 0.0000414 AC: 13 AN: 314286 Hom.: 0 AF XY: 0.0000506 AC XY: 9 AN XY: 177952

Gnomad4 AFR exome AF: 0.000121

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.000218

Gnomad4 SAS exome AF: 0.000119

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.0000190

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome AF: 0.0000329 AC: 5 AN: 152038 Hom.: 0 Cov.: 32 AF XY: 0.0000269 AC XY: 2 AN XY: 74272

Gnomad4 AFR AF: 0.0000726

Gnomad4 AMR AF: 0.0000655

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.00

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.0000147

Gnomad4 OTH AF: 0.00

Bravo AF: 0.0000756

Asia WGS AF: 0.00346 AC: 12 AN: 3478

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Neurodegeneration, childhood-onset, with progressive microcephaly Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Center for Genomic Medicine, King Faisal Specialist Hospital and Research Center

Mar 26, 2024

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Computational scores

Source: dbNSFP v4.3

Splicing

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

Publications

LitVar

Other links and lift over

dbSNP: rs1052974532; hg19: chr2-242624133;