rs1555991472

Variant names:

• chr21-37506173-C-T
• rs1555991472
• NM_001347721.2:c.1594C>T

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 3P and 1B. PM2 PP2 BP4

The NM_001347721.2(DYRK1A):​c.1594C>T​(p.His532Tyr) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.000000684 in 1,461,882 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 6.8e-7 (0 hom.)
• Consequence: DYRK1A NM_001347721.2 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 7.48

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 Uncertain_significance. Variant got 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP2: Missense variant in the DYRK1A gene, where missense mutations are typically associated with disease (based on misZ statistic). The gene has 31 curated pathogenic missense variants (we use a threshold of 10). The gene has 88 curated benign missense variants. Gene score misZ: 3.3441 (above the threshold of 3.09). Trascript score misZ: 4.1103 (above the threshold of 3.09). GenCC associations: The gene is linked to complex neurodevelopmental disorder, DYRK1A-related intellectual disability syndrome.
• BP4: Computational evidence support a benign effect (MetaRNN=0.36953157).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
DYRK1A	NM_001347721.2	c.1594C>T	p.His532Tyr	missense_variant	Exon 11 of 12	ENST00000647188.2	NP_001334650.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
DYRK1A	ENST00000647188.2	c.1594C>T	p.His532Tyr	missense_variant	Exon 11 of 12		NM_001347721.2	ENSP00000494572.1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome AF: 6.84e-7 AC: 1 AN: 1461882 Hom.: 0 Cov.: 31 AF XY: 0.00 AC XY: 0 AN XY: 727238

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 33

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

DYRK1A-related intellectual disability syndrome Uncertain:1

Nov 27, 2017

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Algorithms developed to predict the effect of sequence changes on RNA splicing suggest that this variant may create or strengthen a splice site, but this prediction has not been confirmed by published transcriptional studies. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. Algorithms developed to predict the effect of missense changes on protein structure and function (SIFT, PolyPhen-2, Align-GVGD) all suggest that this variant is likely to be tolerated, but these predictions have not been confirmed by published functional studies and their clinical significance is uncertain. This sequence change replaces histidine with tyrosine at codon 541 of the DYRK1A protein (p.His541Tyr). The histidine residue is highly conserved and there is a moderate physicochemical difference between histidine and tyrosine. This variant is not present in population databases (ExAC no frequency). This variant has not been reported in the literature in individuals with DYRK1A-related disease. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.091
BayesDel_addAF	Uncertain	0.12	D
BayesDel_noAF	Uncertain	-0.060
CADD	Uncertain	23
DANN	Uncertain	1.0
DEOGEN2	Benign	0.24	.;.;.;T;.;.;.;T;T;.
Eigen	Uncertain	0.36
Eigen_PC	Uncertain	0.48
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Uncertain	0.93	D;.;D;.;.;D;.;.;D;D
M_CAP	Benign	0.018	T
MetaRNN	Benign	0.37	T;T;T;T;T;T;T;T;T;T
MetaSVM	Benign	-0.95	T
MutationAssessor	Benign	0.20	.;.;.;N;.;N;.;N;N;.
PrimateAI	Uncertain	0.77	T
PROVEAN	Benign	0.080	.;.;.;.;.;N;.;N;.;.
REVEL	Benign	0.16
Sift	Benign	0.10	.;.;.;.;.;T;.;T;.;.
Sift4G	Benign	1.0	.;.;.;.;.;T;.;T;.;.
Polyphen		0.91, 0.82	.;P;.;P;P;P;P;P;P;P
Vest4		0.80, 0.73
MutPred		0.21		Gain of phosphorylation at H541 (P = 0.041);.;.;Gain of phosphorylation at H541 (P = 0.041);.;Gain of phosphorylation at H541 (P = 0.041);.;Gain of phosphorylation at H541 (P = 0.041);Gain of phosphorylation at H541 (P = 0.041);.;
MVP		0.60
MPC		0.19
ClinPred		0.74	D
GERP RS		5.4
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.16
gMVP		0.55

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.10		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: rs1555991472; hg19: chr21-38878476;