chr6-31666416-A-C

Variant names:

• chr6-31666416-A-C
• rs805257
• NM_001320.7:c.-12+208A>C

Variant summary

Our verdict is Likely benign. The variant received -2 ACMG points: 2P and 4B. PM2 BP4_Strong

The NM_001320.7(CSNK2B):​c.-12+208A>C variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000293 in 34,148 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency:
  • Genomes: not found (cov: 31)
  • Exomes 𝑓: 0.000029 (0 hom.)
• Consequence: CSNK2B NM_001320.7 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.834
• Publications: 0 publications found

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]

ENSG00000263020 (HGNC:):

GPANK1 (HGNC:13920): (G-patch domain and ankyrin repeats 1) This gene is located in a cluster of HLA-B-associated transcripts, which is included in the human major histocompatability complex III region. This gene encodes a protein which is thought to play a role in immunity. Multiple alternatively spliced variants, encoding the same protein, have been identified. [provided by RefSeq, Nov 2010]

ACMG classification

Our verdict: Likely_benign. The variant received -2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.82).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CSNK2B	NM_001320.7	c.-12+208A>C		intron_variant	Intron 1 of 6	ENST00000375882.7	NP_001311.3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
CSNK2B	ENST00000375882.7	c.-12+208A>C		intron_variant	Intron 1 of 6	1	NM_001320.7	ENSP00000365042.3
ENSG00000263020	ENST00000375880.6	c.-12+208A>C		intron_variant	Intron 1 of 7	3		ENSP00000365040.2

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD4 exome AF: 0.0000293 AC: 1 AN: 34148 Hom.: 0 Cov.: 4 AF XY: 0.0000549 AC XY: 1 AN XY: 18212

⚠️ The allele balance in gnomAD version 4 Exomes is significantly skewed from the expected value of 0.5.

African (AFR) AF: 0.00 AC: 0 AN: 732

American (AMR) AF: 0.00 AC: 0 AN: 2390

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 902

East Asian (EAS) AF: 0.00 AC: 0 AN: 1604

South Asian (SAS) AF: 0.00 AC: 0 AN: 3598

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 944

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 114

European-Non Finnish (NFE) AF: 0.0000453 AC: 1 AN: 22056

Other (OTH) AF: 0.00 AC: 0 AN: 1808

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0), which strongly suggests a high chance of mosaicism in these individuals.

GnomAD4 genome Cov.: 31

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.82
CADD	Benign	1.6
DANN	Benign	0.58
PhyloP100		-0.83
PromoterAI		0.014	Neutral

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.060		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: rs805257; hg19: chr6-31634193;