6-31666898-T-C

Position:

• chr6-31666898-T-C

Variant summary

Our verdict is Likely pathogenic. Variant got 9 ACMG points: 9P and 0B. PM1 PM2 PP2 PP3_Strong

The NM_001320.7(CSNK2B):​c.67T>C​(p.Cys23Arg) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. C23F) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 31)
• Consequence: CSNK2B NM_001320.7 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 7.34

Genes affected

CSNK2B (HGNC:2460): (casein kinase 2 beta) This gene encodes the beta subunit of casein kinase II, a ubiquitous protein kinase which regulates metabolic pathways, signal transduction, transcription, translation, and replication. The enzyme is composed of three subunits, alpha, alpha prime and beta, which form a tetrameric holoenzyme. The alpha and alpha prime subunits are catalytic, while the beta subunit serves regulatory functions. The enzyme localizes to the endoplasmic reticulum and the Golgi apparatus. Two transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Sep 2013]

ACMG classification

Verdict is Likely_pathogenic. Variant got 9 ACMG points.

• PM1: In a chain Casein kinase II subunit beta (size 213) in uniprot entity CSK2B_HUMAN there are 29 pathogenic changes around while only 0 benign (100%) in NM_001320.7
• PM2: Very rare variant in population databases, with high coverage
• PP2: Missense variant in gene, where missense usually causes diseases (based on misZ statistic), CSNK2B. . Gene score misZ 3.1296 (greater than the threshold 3.09). Trascript score misZ 3.7791 (greater than threshold 3.09). GenCC has associacion of gene with autosomal dominant non-syndromic intellectual disability, Poirier-Bienvenu neurodevelopmental syndrome.
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.97

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
CSNK2B	NM_001320.7	c.67T>C	p.Cys23Arg	missense_variant	2/7	ENST00000375882.7
CSNK2B	NM_001282385.2	c.67T>C	p.Cys23Arg	missense_variant	2/7

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
CSNK2B	ENST00000375882.7	c.67T>C	p.Cys23Arg	missense_variant	2/7	1	NM_001320.7	P1

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 31

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

May 14, 2021

The c.67T>C (p.C23R) alteration is located in exon 2 (coding exon 1) of the CSNK2B gene. This alteration results from a T to C substitution at nucleotide position 67, causing the cysteine (C) at amino acid position 23 to be replaced by an arginine (R). Based on data from the Genome Aggregation Database (gnomAD), the CSNK2B c.67T>C alteration was not observed, with coverage at this position. This amino acid position is highly conserved in available vertebrate species. The p.C23R alteration is predicted to be deleterious by in silico analysis. 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	Pathogenic	1.0
BayesDel_addAF	Pathogenic	0.50	D
BayesDel_noAF	Pathogenic	0.47
CADD	Pathogenic	33
DANN	Uncertain	1.0
DEOGEN2	Pathogenic	0.89	.;D;D;D;.;.
Eigen	Pathogenic	0.99
Eigen_PC	Pathogenic	0.92
FATHMM_MKL	Uncertain	0.94	D
LIST_S2	Uncertain	0.97	D;.;.;D;D;D
M_CAP	Uncertain	0.11	D
MetaRNN	Pathogenic	0.97	D;D;D;D;D;D
MetaSVM	Uncertain	0.44	D
MutationAssessor	Pathogenic	3.9	.;H;H;H;.;.
PrimateAI	Pathogenic	0.92	D
PROVEAN	Pathogenic	-10	D;D;D;D;D;.
REVEL	Pathogenic	0.68
Sift	Pathogenic	0.0	D;D;D;D;D;.
Sift4G	Pathogenic	0.0	D;D;D;D;D;D
Polyphen		1.0	.;D;D;D;.;.
Vest4		0.95
MutPred		0.87		.;Loss of sheet (P = 0.0357);Loss of sheet (P = 0.0357);Loss of sheet (P = 0.0357);Loss of sheet (P = 0.0357);Loss of sheet (P = 0.0357);
MVP		0.87
MPC		4.3, 3.4
ClinPred		0.99	D
GERP RS		6.0
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.79
gMVP		0.99

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

No publications associated with this variant yet.

Other links and lift over

hg19: chr6-31634675;