2-218960028-G-C

Variant names:

• chr2-218960028-G-C
• NM_003936.5:c.208G>C

Variant summary

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

The NM_003936.5(CDK5R2):​c.208G>C​(p.Val70Leu) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency: Genomes: not found (cov: 32)
• Consequence: CDK5R2 NM_003936.5 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 4.95

Genes affected

CDK5R2 (HGNC:1776): (cyclin dependent kinase 5 regulatory subunit 2) The protein encoded by this gene is a neuron-specific activator of CDK5 kinase. It associates with CDK5 to form an active kinase. This protein and neuron-specific CDK5 activator CDK5R1/p39NCK5A both share limited similarity to cyclins, and thus may define a distinct family of cyclin-dependent kinase activating proteins. [provided by RefSeq, Jul 2008]

CDK5R2-AS1 (HGNC:55677): (CDK5R2 antisense RNA 1)

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 rank	MANE	Protein	UniProt
CDK5R2	NM_003936.5	c.208G>C	p.Val70Leu	missense_variant	Exon 1 of 1	ENST00000302625.6	NP_003927.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
CDK5R2	ENST00000302625.6	c.208G>C	p.Val70Leu	missense_variant	Exon 1 of 1	6	NM_003936.5	ENSP00000304250.4
CDK5R2-AS1	ENST00000429343.1	n.45+1831C>G		intron_variant	Intron 1 of 1	4

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Jan 01, 2025

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.208G>C (p.V70L) alteration is located in exon 1 (coding exon 1) of the CDK5R2 gene. This alteration results from a G to C substitution at nucleotide position 208, causing the valine (V) at amino acid position 70 to be replaced by a leucine (L). 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	0.93
BayesDel_addAF	Uncertain	0.064	T
BayesDel_noAF	Benign	-0.15
CADD	Uncertain	24
DANN	Uncertain	0.99
DEOGEN2	Benign	0.25	T
Eigen	Uncertain	0.66
Eigen_PC	Uncertain	0.64
FATHMM_MKL	Uncertain	0.97	D
LIST_S2	Uncertain	0.93	D
M_CAP	Pathogenic	0.49	D
MetaRNN	Uncertain	0.62	D
MetaSVM	Uncertain	0.054	D
MutationAssessor	Benign	2.0	M
PrimateAI	Pathogenic	0.82	D
PROVEAN	Benign	-1.8	N
REVEL	Uncertain	0.57
Sift	Benign	0.092	T
Sift4G	Benign	0.14	T
Polyphen		1.0	D
Vest4		0.13
MutPred		0.63		Gain of glycosylation at K67 (P = 0.2305);
MVP		0.82
ClinPred		0.89	D
GERP RS		4.4
Varity_R		0.31
gMVP		0.56

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: chr2-219824750;