rs869312840

Variant names:

• chr20-492282-T-C
• rs869312840
• NM_177559.3:c.593A>G

Variant summary

Our verdict is Pathogenic. The variant received 13 ACMG points: 13P and 0B. PM1 PM2 PP2 PP5_Very_Strong

The NM_001895.4(CSNK2A1):​c.593A>G​(p.Lys198Arg) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00000137 in 1,461,822 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Likely pathogenic (★★).

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000014 (0 hom.)
• Consequence: CSNK2A1 NM_001895.4 missense
• Clinical Significance: Pathogenic/Likely pathogenic criteria provided, multiple submitters, no conflicts P:23
• Conservation: PhyloP100: 7.99
• Publications: 20 publications found

Genes affected

CSNK2A1 (HGNC:2457): (casein kinase 2 alpha 1) Casein kinase II is a serine/threonine protein kinase that phosphorylates acidic proteins such as casein. It is involved in various cellular processes, including cell cycle control, apoptosis, and circadian rhythm. The kinase exists as a tetramer and is composed of an alpha, an alpha-prime, and two beta subunits. The alpha subunits contain the catalytic activity while the beta subunits undergo autophosphorylation. The protein encoded by this gene represents the alpha subunit. Multiple transcript variants encoding different protein isoforms have been found for this gene. [provided by RefSeq, Apr 2018]

CSNK2A1 Gene-Disease associations (from GenCC):

• Okur-Chung neurodevelopmental syndrome

  Inheritance: AD Classification: DEFINITIVE, STRONG, MODERATE Submitted by: PanelApp Australia, Labcorp Genetics (formerly Invitae), Illumina, Ambry Genetics, G2P
• syndromic intellectual disability

  Inheritance: AD Classification: DEFINITIVE Submitted by: ClinGen

ACMG classification

Our verdict: Pathogenic. The variant received 13 ACMG points.

• PM1: In a hotspot region, there are 5 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 0 benign, 3 uncertain in NM_001895.4
• PM2: Very rare variant in population databases, with high coverage
• PP2: Missense variant in the CSNK2A1 gene, where missense mutations are typically associated with disease (based on misZ statistic). The gene has 28 curated pathogenic missense variants (we use a threshold of 10). The gene has 7 curated benign missense variants. Gene score misZ: 3.7123 (above the threshold of 3.09). Trascript score misZ: 5.3205 (above the threshold of 3.09). GenCC associations: The gene is linked to Okur-Chung neurodevelopmental syndrome, syndromic intellectual disability.
• PP5: Variant 20-492282-T-C is Pathogenic according to our data. Variant chr20-492282-T-C is described in ClinVar as Pathogenic/Likely_pathogenic. ClinVar VariationId is 224790.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001895.4. 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
	CSNK2A1	NM_177559.3	MANE Select	c.593A>G	p.Lys198Arg	missense	Exon 9 of 14	NP_808227.1
	CSNK2A1	NM_001362770.2		c.593A>G	p.Lys198Arg	missense	Exon 9 of 15	NP_001349699.1
	CSNK2A1	NM_001362771.2		c.593A>G	p.Lys198Arg	missense	Exon 8 of 14	NP_001349700.1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CSNK2A1	ENST00000217244.9	TSL:1 MANE Select	c.593A>G	p.Lys198Arg	missense	Exon 9 of 14	ENSP00000217244.3
	CSNK2A1	ENST00000400227.8	TSL:1	c.593A>G	p.Lys198Arg	missense	Exon 8 of 13	ENSP00000383086.3
	CSNK2A1	ENST00000349736.10	TSL:1	c.185A>G	p.Lys62Arg	missense	Exon 7 of 12	ENSP00000339247.6

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD2 exomes AF: 0.00000398 AC: 1 AN: 251364 AF XY: 0.00000736

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00000880

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000137 AC: 2 AN: 1461822 Hom.: 0 Cov.: 30 AF XY: 0.00000275 AC XY: 2 AN XY: 727220

African (AFR) AF: 0.00 AC: 0 AN: 33478

American (AMR) AF: 0.00 AC: 0 AN: 44724

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26132

East Asian (EAS) AF: 0.00 AC: 0 AN: 39684

South Asian (SAS) AF: 0.00 AC: 0 AN: 86258

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53414

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5768

European-Non Finnish (NFE) AF: 0.00000180 AC: 2 AN: 1111972

Other (OTH) AF: 0.00 AC: 0 AN: 60392

GnomAD4 genome Cov.: 32

Alfa AF: 0.00 Hom.: 0

ClinVar

ClinVar submissions as Germline

Significance: Pathogenic/Likely pathogenic

Revision: criteria provided, multiple submitters, no conflicts

Pathogenic	VUS	Benign	Condition
15	-	-	Okur-Chung neurodevelopmental syndrome (15)
5	-	-	not provided (5)
1	-	-	Inborn genetic diseases (1)
1	-	-	Neurodevelopmental delay (1)
1	-	-	See cases (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.93
BayesDel_addAF	Uncertain	0.11	D
BayesDel_noAF	Uncertain	-0.080
CADD	Pathogenic	29
DANN	Uncertain	1.0
DEOGEN2	Benign	0.40	T
Eigen	Uncertain	0.43
Eigen_PC	Uncertain	0.51
FATHMM_MKL	Uncertain	0.97	D
LIST_S2	Uncertain	0.91	D
M_CAP	Benign	0.019	T
MetaRNN	Uncertain	0.66	D
MetaSVM	Benign	-0.96	T
MutationAssessor	Benign	-0.095	N
PhyloP100		8.0
PrimateAI	Pathogenic	0.84	D
PROVEAN	Uncertain	-2.9	D
REVEL	Uncertain	0.39
Sift	Uncertain	0.0010	D
Sift4G	Benign	0.062	T
Polyphen		0.89	P
Vest4		0.87
MutPred		0.70		Loss of ubiquitination at K198 (P = 0.0309)
MVP		0.90
MPC		2.3
ClinPred		0.95	D
GERP RS		4.8
Varity_R		0.92
gMVP		0.91
Mutation Taster		=0/100	disease causing (ClinVar)

Splicing

Name	Calibrated prediction	Score	Prediction
Splicevardb		1.0
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: rs869312840; hg19: chr20-472926;