chr17-32487810-A-G

Position:

• chr17-32487810-A-G

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_003885.3(CDK5R1):​c.190A>G​(p.Asn64Asp) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. 14/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: CDK5R1 NM_003885.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 1.46

Genes affected

CDK5R1 (HGNC:1775): (cyclin dependent kinase 5 regulatory subunit 1) The protein encoded by this gene (p35) is a neuron-specific activator of cyclin-dependent kinase 5 (CDK5); the activation of CDK5 is required for proper development of the central nervous system. The p35 form of this protein is proteolytically cleaved by calpain, generating a p25 form. The cleavage of p35 into p25 results in relocalization of the protein from the cell periphery to nuclear and perinuclear regions. P25 deregulates CDK5 activity by prolonging its activation and changing its cellular location. The p25 form accumulates in the brain neurons of patients with Alzheimer's disease. This accumulation correlates with an increase in CDK5 kinase activity, and may lead to aberrantly phosphorylated forms of the microtubule-associated protein tau, which contributes to Alzheimer's disease. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Uncertain_significance. Variant got 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.108421).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
CDK5R1	NM_003885.3	c.190A>G	p.Asn64Asp	missense_variant	2/2	ENST00000313401.4	NP_003876.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
CDK5R1	ENST00000313401.4	c.190A>G	p.Asn64Asp	missense_variant	2/2	1	NM_003885.3	ENSP00000318486	P1
CDK5R1	ENST00000584716.1	c.16A>G	p.Asn6Asp	missense_variant, NMD_transcript_variant	1/3	1		ENSP00000463654
CDK5R1	ENST00000584792.5	c.16A>G	p.Asn6Asp	missense_variant	1/2	2		ENSP00000464129

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

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Dec 14, 2023

The c.190A>G (p.N64D) alteration is located in exon 2 (coding exon 1) of the CDK5R1 gene. This alteration results from a A to G substitution at nucleotide position 190, causing the asparagine (N) at amino acid position 64 to be replaced by an aspartic acid (D). 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	0.51
BayesDel_addAF	Benign	-0.17	T
BayesDel_noAF	Benign	-0.49
CADD	Benign	23
DANN	Benign	0.95
DEOGEN2	Benign	0.22	T
Eigen	Benign	-0.36
Eigen_PC	Benign	-0.16
FATHMM_MKL	Benign	0.29	N
LIST_S2	Benign	0.86	D
M_CAP	Benign	0.018	T
MetaRNN	Benign	0.11	T
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	0.97	L
MutationTaster	Benign	0.99	N
PrimateAI	Uncertain	0.71	T
PROVEAN	Benign	-0.85	N
REVEL	Benign	0.14
Sift	Benign	0.52	T
Sift4G	Benign	0.59	T
Polyphen		0.0	B
Vest4		0.16
MutPred		0.42		Gain of sheet (P = 0.0477);
MVP		0.70
MPC		1.2
ClinPred		0.19	T
GERP RS		4.0
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.098
gMVP		0.15

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: chr17-30814828;