20-486411-C-T

Variant summary

Our verdict is Likely benign. Variant got -1 ACMG points: 3P and 4B. PM2 PP2 BP4_Strong

The NM_177559.3(CSNK2A1):c.1025G>A(p.Gly342Asp) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000031 in 1,613,070 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 13/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: 𝑓 0.000013 (0 hom., cov: 31)
  • Exomes 𝑓: 0.0000021 (0 hom.)
• Consequence: CSNK2A1 NM_177559.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 1.83

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]

ACMG classification

Verdict is Likely_benign. Variant got -1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP2: Missense variant where missense usually causes diseases, CSNK2A1
• BP4: Computational evidence support a benign effect (MetaRNN=0.048299134).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
CSNK2A1	NM_177559.3	c.1025G>A	p.Gly342Asp	missense_variant	13/14	ENST00000217244.9

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
CSNK2A1	ENST00000217244.9	c.1025G>A	p.Gly342Asp	missense_variant	13/14	1	NM_177559.3	P1

Frequencies

GnomAD3 genomes AF: 0.0000132 AC: 2 AN: 151596 Hom.: 0 Cov.: 31

Gnomad AFR AF: 0.00

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.000132

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: 0.00

Gnomad OTH AF: 0.00

GnomAD3 exomes AF: 0.00000796 AC: 2 AN: 251306 Hom.: 0 AF XY: 0.00 AC XY: 0 AN XY: 135826

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.0000992

Gnomad EAS exome AF: 0.00

Gnomad SAS 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: 0.00000205 AC: 3 AN: 1461356 Hom.: 0 Cov.: 30 AF XY: 0.00 AC XY: 0 AN XY: 727022

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.0000224

Gnomad4 ASJ exome AF: 0.0000383

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 9.00e-7

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome AF: 0.0000132 AC: 2 AN: 151714 Hom.: 0 Cov.: 31 AF XY: 0.0000135 AC XY: 1 AN XY: 74072

Gnomad4 AFR AF: 0.00

Gnomad4 AMR AF: 0.000132

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.00

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.00

Gnomad4 OTH AF: 0.00

Alfa AF: 0.0000422 Hom.: 0

ExAC AF: 0.00000824 AC: 1

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Inborn genetic diseases Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Mar 06, 2023

The c.1025G>A (p.G342D) alteration is located in exon 13 (coding exon 11) of the CSNK2A1 gene. This alteration results from a G to A substitution at nucleotide position 1025, causing the glycine (G) at amino acid position 342 to be replaced by an aspartic acid (D). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Uncertain	0.37
BayesDel_addAF	Benign	-0.089	T
BayesDel_noAF	Benign	-0.37
Cadd	Benign	21
Dann	Uncertain	0.98
DEOGEN2	Benign	0.33	T;T;T;T;T;.;T;T;.;.;.;T;.;.;.;.;.;T;T
Eigen	Benign	-0.56
Eigen_PC	Benign	-0.40
FATHMM_MKL	Uncertain	0.92	D
M_CAP	Benign	0.022	T
MetaRNN	Benign	0.048	T;T;T;T;T;T;T;T;T;T;T;T;T;T;T;T;T;T;T
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	0.34	N;N;N;.;.;.;N;N;.;.;.;N;.;.;.;.;.;N;N
MutationTaster	Benign	1.0	D;D;D;D
PrimateAI	Uncertain	0.55	T
Polyphen		0.047	B;B;B;.;.;.;B;B;.;.;.;B;.;.;.;.;.;B;B
Vest4		0.37, 0.37
MutPred		0.17		Loss of catalytic residue at G342 (P = 0.0236);Loss of catalytic residue at G342 (P = 0.0236);Loss of catalytic residue at G342 (P = 0.0236);.;Loss of catalytic residue at G342 (P = 0.0236);.;Loss of catalytic residue at G342 (P = 0.0236);Loss of catalytic residue at G342 (P = 0.0236);.;.;Loss of catalytic residue at G342 (P = 0.0236);Loss of catalytic residue at G342 (P = 0.0236);.;.;.;.;.;Loss of catalytic residue at G342 (P = 0.0236);Loss of catalytic residue at G342 (P = 0.0236);
MVP		0.67
MPC		0.063
ClinPred		0.19	T
GERP RS		2.0
Varity_R		0.16
gMVP		0.36

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: rs201877131; hg19: chr20-467055;