chr21-37493662-A-G

Position:

• chr21-37493662-A-G

Variant summary

Our verdict is Benign. Variant got -12 ACMG points: 0P and 12B. BP4_Strong BA1

The NM_001347721.2(DYRK1A):​c.1071+499A>G variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.446 in 151,934 control chromosomes in the GnomAD database, including 15,939 homozygotes. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency: Genomes: 𝑓 0.45 (15939 hom., cov: 31)
• Consequence: DYRK1A NM_001347721.2 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -2.01

Genes affected

DYRK1A (HGNC:3091): (dual specificity tyrosine phosphorylation regulated kinase 1A) This gene encodes a member of the Dual-specificity tyrosine phosphorylation-regulated kinase (DYRK) family. This member contains a nuclear targeting signal sequence, a protein kinase domain, a leucine zipper motif, and a highly conservative 13-consecutive-histidine repeat. It catalyzes its autophosphorylation on serine/threonine and tyrosine residues. It may play a significant role in a signaling pathway regulating cell proliferation and may be involved in brain development. This gene is a homolog of Drosophila mnb (minibrain) gene and rat Dyrk gene. It is localized in the Down syndrome critical region of chromosome 21, and is considered to be a strong candidate gene for learning defects associated with Down syndrome. Alternative splicing of this gene generates several transcript variants differing from each other either in the 5' UTR or in the 3' coding region. These variants encode at least five different isoforms. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Benign. Variant got -12 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.89).
• BA1: GnomAd4 highest subpopulation (EAS) allele frequency at 95% confidence interval = 0.552 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
DYRK1A	NM_001347721.2	c.1071+499A>G		intron_variant		ENST00000647188.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
DYRK1A	ENST00000647188.2	c.1071+499A>G		intron_variant			NM_001347721.2	P1

Frequencies

GnomAD3 genomes AF: 0.447 AC: 67789 AN: 151816 Hom.: 15935 Cov.: 31

Gnomad AFR AF: 0.294

Gnomad AMI AF: 0.611

Gnomad AMR AF: 0.532

Gnomad ASJ AF: 0.495

Gnomad EAS AF: 0.567

Gnomad SAS AF: 0.452

Gnomad FIN AF: 0.492

Gnomad MID AF: 0.456

Gnomad NFE AF: 0.499

Gnomad OTH AF: 0.429

We have no GnomAD4 exomes data on this position. Probably position not covered by the project.

GnomAD4 genome AF: 0.446 AC: 67815 AN: 151934 Hom.: 15939 Cov.: 31 AF XY: 0.451 AC XY: 33463 AN XY: 74270

Gnomad4 AFR AF: 0.293

Gnomad4 AMR AF: 0.533

Gnomad4 ASJ AF: 0.495

Gnomad4 EAS AF: 0.569

Gnomad4 SAS AF: 0.452

Gnomad4 FIN AF: 0.492

Gnomad4 NFE AF: 0.499

Gnomad4 OTH AF: 0.427

Alfa AF: 0.460 Hom.: 2092

Bravo AF: 0.444

Asia WGS AF: 0.481 AC: 1671 AN: 3478

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.89
CADD	Benign	0.10
DANN	Benign	0.75

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: rs2835773; hg19: chr21-38865964;