Genetic Variant NM_003936.5:c.400A>T (chr2-218960220-A-T) – ACMG Classification: Likely_benign (-2 pts)

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2BP4_Strong

The NM_003936.5(CDK5R2):c.400A>T(p.Thr134Ser) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000109 in 1,393,734 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 14/20 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.000027 ( 0 hom., cov: 32)

Exomes 𝑓: 0.00012 ( 0 hom. )

Consequence

CDK5R2
NM_003936.5 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: -0.0170

Variant links:

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 links:

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

CDK5R2-AS1 links:

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ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.05431044).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CDK5R2	NM_003936.5 link	c.400A>T	p.Thr134Ser	missense_variant	Exon 1 of 1	ENST00000302625.6	NP_003927.1	Q13319

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
CDK5R2	ENST00000302625.6 link	c.400A>T	p.Thr134Ser	missense_variant	Exon 1 of 1	6	NM_003936.5	ENSP00000304250.4		Q13319
CDK5R2-AS1	ENST00000429343.1 link	n.45+1639T>A		intron_variant	Intron 1 of 1	4

Frequencies

GnomAD3 genomes

AF:

0.0000266

AC:

AN:

150452

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000132

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000296

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000662

AC:

AN:

45336

Hom.:

AF XY:

0.0000713

AC XY:

AN XY:

28038

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.000267

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000105

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.000119

AC:

148

AN:

1243282

Hom.:

Cov.:

AF XY:

0.000120

AC XY:

AN XY:

608802

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.000146

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000177

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.000137

Gnomad4 OTH exome

AF:

0.0000790

GnomAD4 genome

AF:

0.0000266

AC:

AN:

150452

Hom.:

Cov.:

AF XY:

0.0000272

AC XY:

AN XY:

73418

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.000132

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000296

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000712

Hom.:

ExAC

AF:

0.0000191

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Nov 03, 2023

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.400A>T (p.T134S) alteration is located in exon 1 (coding exon 1) of the CDK5R2 gene. This alteration results from a A to T substitution at nucleotide position 400, causing the threonine (T) at amino acid position 134 to be replaced by a serine (S). 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

Benign

0.064

BayesDel_addAF

Benign

-0.40

BayesDel_noAF

Benign

-0.52

CADD

Benign

DANN

Benign

0.89

DEOGEN2

Benign

0.079

Eigen

Benign

-0.78

Eigen_PC

Benign

-0.65

FATHMM_MKL

Uncertain

0.84

LIST_S2

Benign

0.35

M_CAP

Pathogenic

0.36

MetaRNN

Benign

0.054

MetaSVM

Benign

-0.98

MutationAssessor

Benign

-0.34

PrimateAI

Pathogenic

0.93

PROVEAN

Benign

0.22

REVEL

Benign

0.064

Sift

Benign

0.81

Sift4G

Benign

0.94

Polyphen

0.026

Vest4

0.085

MutPred

0.28

Gain of glycosylation at P137 (P = 0.2105);

MVP

0.47

ClinPred

0.027

GERP RS

-0.34

Varity_R

0.094

gMVP

0.16

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

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over