chr3-184261182-G-T

Position:

• chr3-184261182-G-T

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 2P and 0B. PM2

The NM_033259.3(CAMK2N2):​c.104C>A​(p.Ser35Tyr) variant causes a missense change. The variant allele was found at a frequency of 0.00000412 in 1,456,398 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000041 (0 hom.)
• Consequence: CAMK2N2 NM_033259.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 5.58

Genes affected

CAMK2N2 (HGNC:24197): (calcium/calmodulin dependent protein kinase II inhibitor 2) This gene encodes a protein that is highly similar to the rat CaM-KII inhibitory protein, an inhibitor of calcium/calmodulin-dependent protein kinase II (CAMKII). CAMKII regulates numerous physiological functions, including neuronal synaptic plasticity through the phosphorylation of alpha-amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid-type glutamate (AMPA) receptors. Studies of the similar protein in rat suggest that this protein may function as a negative regulator of CaM-KII and may act to inhibit the phosphorylation of AMPA receptors. [provided by RefSeq, Jul 2008]

EEF1AKMT4-ECE2 (HGNC:53615): (EEF1AKMT4-ECE2 readthrough) This gene represents naturally occurring readthrough transcription between adjacent genes eukaryotic translation elongation factor 1 alpha lysine methyltransferase 4 (GeneID: 110599564) and endothelin converting enzyme 2 (GeneID:9718). The readthrough transcript representing this gene encodes a fusion protein that shares sequence identity with each individual gene product. [provided by RefSeq, Jul 2017]

ACMG classification

Verdict is Uncertain_significance. Variant got 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
CAMK2N2	NM_033259.3	c.104C>A	p.Ser35Tyr	missense_variant	1/2	ENST00000296238.4	NP_150284.1
EEF1AKMT4-ECE2	NM_014693.4	c.480+3426G>T		intron_variant			NP_055508.3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
CAMK2N2	ENST00000296238.4	c.104C>A	p.Ser35Tyr	missense_variant	1/2	1	NM_033259.3	ENSP00000296238.3
EEF1AKMT4-ECE2	ENST00000402825.7	c.480+3426G>T		intron_variant		1		ENSP00000384223.3

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 0.00000412 AC: 6 AN: 1456398 Hom.: 0 Cov.: 34 AF XY: 0.00000552 AC XY: 4 AN XY: 724674

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00000540

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

EpiCase AF: 0.0000545

EpiControl AF: 0.00

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

May 05, 2023

The c.104C>A (p.S35Y) alteration is located in exon 1 (coding exon 1) of the CAMK2N2 gene. This alteration results from a C to A substitution at nucleotide position 104, causing the serine (S) at amino acid position 35 to be replaced by a tyrosine (Y). 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	0.48
BayesDel_addAF	Uncertain	0.037	T
BayesDel_noAF	Benign	-0.19
CADD	Pathogenic	28
DANN	Uncertain	0.99
DEOGEN2	Benign	0.11	T
Eigen	Uncertain	0.50
Eigen_PC	Uncertain	0.47
FATHMM_MKL	Benign	0.71	D
LIST_S2	Uncertain	0.87	D
M_CAP	Pathogenic	0.75	D
MetaRNN	Uncertain	0.47	T
MetaSVM	Benign	-0.41	T
PrimateAI	Pathogenic	0.90	D
PROVEAN	Uncertain	-3.3	D
REVEL	Pathogenic	0.72
Sift	Uncertain	0.029	D
Sift4G	Uncertain	0.028	D
Polyphen		0.95	P
Vest4		0.44
MutPred		0.26		Loss of disorder (P = 0.004);
MVP		0.16
MPC		2.0
ClinPred		0.99	D
GERP RS		3.9
Varity_R		0.44
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: rs925992675; hg19: chr3-183978970;