NM_001220.5:c.85C>T

Variant names:

• chr7-44284206-G-A
• rs1554434435
• NM_001220.5:c.85C>T

Variant summary

Our verdict is Pathogenic. The variant received 14 ACMG points: 14P and 0B. PVS1_Strong PM2 PP5_Very_Strong

The NM_001220.5(CAMK2B):​c.85C>T​(p.Arg29*) variant causes a stop gained change. 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 Pathogenic (★★).

• Frequency: Genomes: not found (cov: 33)
• Consequence: CAMK2B NM_001220.5 stop_gained
• Clinical Significance: Pathogenic criteria provided, multiple submitters, no conflicts P:4
• Conservation: PhyloP100: 4.55
• Publications: 0 publications found

Genes affected

CAMK2B (HGNC:1461): (calcium/calmodulin dependent protein kinase II beta) The product of this gene belongs to the serine/threonine protein kinase family and to the Ca(2+)/calmodulin-dependent protein kinase subfamily. Calcium signaling is crucial for several aspects of plasticity at glutamatergic synapses. In mammalian cells, the enzyme is composed of four different chains: alpha, beta, gamma, and delta. The product of this gene is a beta chain. It is possible that distinct isoforms of this chain have different cellular localizations and interact differently with calmodulin. Alternative splicing results in multiple transcript variants. [provided by RefSeq, May 2014]

CAMK2B Gene-Disease associations (from GenCC):

• intellectual disability, autosomal dominant 40

  Inheritance: AD Classification: DEFINITIVE Submitted by: Illumina
• intellectual disability, autosomal dominant 54

  Inheritance: AD Classification: STRONG Submitted by: G2P, Labcorp Genetics (formerly Invitae)
• autosomal dominant non-syndromic intellectual disability

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

ACMG classification

Our verdict: Pathogenic. The variant received 14 ACMG points.

• PVS1: Loss of function variant, product does not undergo nonsense mediated mRNA decay. Variant located near the start codon (<100nt), not predicted to undergo nonsense mediated mRNA decay. There are 12 pathogenic variants in the truncated region.
• PM2: Very rare variant in population databases, with high coverage
• PP5: Variant 7-44284206-G-A is Pathogenic according to our data. Variant chr7-44284206-G-A is described in ClinVar as Pathogenic. ClinVar VariationId is 430920.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001220.5. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CAMK2B	NM_001220.5	MANE Select	c.85C>T	p.Arg29*	stop_gained	Exon 2 of 24	NP_001211.3
	CAMK2B	NM_001293170.2		c.85C>T	p.Arg29*	stop_gained	Exon 2 of 21	NP_001280099.1
	CAMK2B	NM_172078.3		c.85C>T	p.Arg29*	stop_gained	Exon 2 of 21	NP_742075.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CAMK2B	ENST00000395749.7	TSL:1 MANE Select	c.85C>T	p.Arg29*	stop_gained	Exon 2 of 24	ENSP00000379098.2
	CAMK2B	ENST00000440254.6	TSL:1	c.85C>T	p.Arg29*	stop_gained	Exon 2 of 21	ENSP00000397937.2
	CAMK2B	ENST00000395747.6	TSL:1	c.85C>T	p.Arg29*	stop_gained	Exon 2 of 19	ENSP00000379096.2

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 30

GnomAD4 genome Cov.: 33

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:4

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

Intellectual disability, autosomal dominant 54 Pathogenic:2

Apr 28, 2022

OMIM

Significance: Pathogenic

Review Status: no assertion criteria provided

Collection Method: literature only

Institute for Genomic Statistics and Bioinformatics, University Hospital Bonn

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

ACMG classification: pathogenic (class 5: PVS1, PM2, PP5)

not provided Pathogenic:1

Sep 02, 2020

GeneDx

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Nonsense variant predicted to result in protein truncation or nonsense mediated decay in a gene for which loss-of-function is a known mechanism of disease; Not observed in large population cohorts (Lek et al., 2016); This variant is associated with the following publications: (PMID: 29100089, 33796307)

Intellectual disability Pathogenic:1

Jul 03, 2017

Laboratory of Molecular Genetics (Pr. Bezieau's lab), CHU de Nantes

Significance: Likely pathogenic

Review Status: no assertion criteria provided

Collection Method: research

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Pathogenic	0.58	D
BayesDel_noAF	Pathogenic	0.60
CADD	Pathogenic	51
DANN	Uncertain	1.0
Eigen	Pathogenic	0.83
Eigen_PC	Pathogenic	0.69
FATHMM_MKL	Uncertain	0.95	D
PhyloP100		4.6
Vest4		0.81
GERP RS		4.8
Mutation Taster		=0/200	disease causing (ClinVar)

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.020		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: rs1554434435; hg19: chr7-44323805; COSMIC: COSV99323327;