chr21-37512490-A-G

Variant names:

• chr21-37512490-A-G
• rs147973077
• NM_001347721.2:c.2224A>G

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_001347721.2(DYRK1A):​c.2224A>G​(p.Thr742Ala) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. 14/22 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. T742S) has been classified as Likely benign.

• Frequency: Genomes: not found (cov: 32)
• Consequence: DYRK1A NM_001347721.2 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 6.05
• Publications: 2 publications found

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]

DYRK1A Gene-Disease associations (from GenCC):

• complex neurodevelopmental disorder

  Inheritance: AD Classification: DEFINITIVE Submitted by: ClinGen
• DYRK1A-related intellectual disability syndrome

  Inheritance: AD Classification: DEFINITIVE, STRONG Submitted by: G2P, Labcorp Genetics (formerly Invitae)

ACMG classification

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.21168754).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001347721.2. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	DYRK1A	NM_001347721.2	MANE Select	c.2224A>G	p.Thr742Ala	missense	Exon 12 of 12	NP_001334650.1	Q13627-2
	DYRK1A	NM_001396.5		c.2251A>G	p.Thr751Ala	missense	Exon 12 of 12	NP_001387.2
	DYRK1A	NM_001347722.2		c.2224A>G	p.Thr742Ala	missense	Exon 12 of 12	NP_001334651.1	Q13627-2

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	DYRK1A	ENST00000647188.2	MANE Select	c.2224A>G	p.Thr742Ala	missense	Exon 12 of 12	ENSP00000494572.1	Q13627-2
	DYRK1A	ENST00000398960.7	TSL:1	c.2251A>G	p.Thr751Ala	missense	Exon 12 of 12	ENSP00000381932.2	Q13627-1
	DYRK1A	ENST00000338785.8	TSL:1	c.*627A>G		3_prime_UTR	Exon 13 of 13	ENSP00000342690.3	Q13627-5

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 32

Alfa AF: 0.0000251 Hom.: 0

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.052
BayesDel_addAF	Benign	-0.0071	T
BayesDel_noAF	Benign	-0.25
CADD	Benign	19
DANN	Uncertain	0.98
DEOGEN2	Benign	0.26	T
Eigen	Benign	0.14
Eigen_PC	Uncertain	0.28
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Uncertain	0.88	D
M_CAP	Benign	0.0085	T
MetaRNN	Benign	0.21	T
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	0.20	N
PhyloP100		6.1
PrimateAI	Uncertain	0.66	T
PROVEAN	Benign	-0.92	N
REVEL	Benign	0.17
Sift	Benign	0.16	T
Sift4G	Benign	0.23	T
Polyphen		0.76	P
Vest4		0.31
MutPred		0.12		Loss of glycosylation at T751 (P = 0.0439)
MVP		0.60
MPC		0.16
ClinPred		0.64	D
GERP RS		5.1
Varity_R		0.19
gMVP		0.45
Mutation Taster		=35/65	disease causing

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

Other links and lift over

dbSNP: rs147973077; hg19: chr21-38884793;