chr9-120389782-C-T

Position:

chr9-120389782-C-T

Variant summary

Our verdict is Likely benign. Variant got -3 ACMG points: 2P and 5B. PM2BP4_StrongBS1_Supporting

The NM_018249.6(CDK5RAP2):c.5584G>A(p.Val1862Ile) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000762 in 1,613,994 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 15/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★).

Frequency

Genomes: 𝑓 0.00030 ( 0 hom., cov: 33)

Exomes 𝑓: 0.000053 ( 0 hom. )

Consequence

CDK5RAP2
NM_018249.6 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:3

Conservation

PhyloP100: 0.712

Variant links:

Genes affected

CDK5RAP2 (HGNC:18672): (CDK5 regulatory subunit associated protein 2) This gene encodes a regulator of CDK5 (cyclin-dependent kinase 5) activity. The protein encoded by this gene is localized to the centrosome and Golgi complex, interacts with CDK5R1 and pericentrin (PCNT), plays a role in centriole engagement and microtubule nucleation, and has been linked to primary microcephaly and Alzheimer's disease. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Jan 2013]

CDK5RAP2 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -3 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.00676316).

BS1

Variant frequency is greater than expected in population afr. gnomad4 allele frequency = 0.000295 (45/152292) while in subpopulation AFR AF= 0.000963 (40/41556). AF 95% confidence interval is 0.000726. There are 0 homozygotes in gnomad4. There are 23 alleles in male gnomad4 subpopulation. Median coverage is 33. This position pass quality control queck. Existence of Clinvar submissions makes me limit the strength of this signal to Supporting

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
CDK5RAP2	NM_018249.6 linkuse as main transcript	c.5584G>A	p.Val1862Ile	missense_variant	37/38	ENST00000349780.9

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
CDK5RAP2	ENST00000349780.9 linkuse as main transcript	c.5584G>A	p.Val1862Ile	missense_variant	37/38	1	NM_018249.6	P4	Q96SN8-1

Frequencies

GnomAD3 genomes

AF:

0.000296

AC:

AN:

152174

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000965

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000196

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:

0.0000147

Gnomad OTH

AF:

0.000479

GnomAD3 exomes

AF:

0.000115

AC:

AN:

251440

Hom.:

AF XY:

0.000118

AC XY:

AN XY:

135890

show subpopulations

Gnomad AFR exome

AF:

0.00117

Gnomad AMR exome

AF:

0.000173

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.0000980

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00000879

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000534

AC:

AN:

1461702

Hom.:

Cov.:

AF XY:

0.0000536

AC XY:

AN XY:

727176

show subpopulations

Gnomad4 AFR exome

AF:

0.000597

Gnomad4 AMR exome

AF:

0.000224

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.0000252

Gnomad4 SAS exome

AF:

0.0000928

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000288

Gnomad4 OTH exome

AF:

0.000116

GnomAD4 genome

AF:

0.000295

AC:

AN:

152292

Hom.:

Cov.:

AF XY:

0.000309

AC XY:

AN XY:

74470

show subpopulations

Gnomad4 AFR

AF:

0.000963

Gnomad4 AMR

AF:

0.000196

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000147

Gnomad4 OTH

AF:

0.000474

Alfa

AF:

0.0000865

Hom.:

Bravo

AF:

0.000329

ESP6500AA

AF:

0.000908

AC:

ESP6500EA

AF:

0.00

AC:

ExAC

AF:

0.000115

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:3

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Uncertain:2

Uncertain significance, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Apr 23, 2022	This sequence change replaces valine, which is neutral and non-polar, with isoleucine, which is neutral and non-polar, at codon 1862 of the CDK5RAP2 protein (p.Val1862Ile). This variant is present in population databases (rs147082653, gnomAD 0.1%). This variant has not been reported in the literature in individuals affected with CDK5RAP2-related conditions. ClinVar contains an entry for this variant (Variation ID: 419838). Algorithms developed to predict the effect of missense changes on protein structure and function output the following: SIFT: "Tolerated"; PolyPhen-2: "Possibly Damaging"; Align-GVGD: "Class C0". The isoleucine amino acid residue is found in multiple mammalian species, which suggests that this missense change does not adversely affect protein function. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -
Uncertain significance, criteria provided, single submitter	clinical testing	GeneDx	Sep 22, 2015	A variant of unknown significance has been identified in the CDK5RAP2 gene. The V1862I variant has not been published as a pathogenic variant, nor has it been reported as a benign polymorphism to our knowledge. The V1862I variant was not observed with any significant frequency in approximately 6,500 individuals of European and African American ancestry in the NHLBI Exome Sequencing Project, but the 1000 Genomes Project reports it was observed in 2/1,322 (0.2%) alleles from individuals of African background. The V1862I variant is a conservative amino acid substitution, which is not likely to impact secondary protein structure as these residues share similar properties. Additionally, this substitution occurs at a position that is not conserved across species, and in silico analysis predicts this variant likely does not alter the protein structure/function. Based on the currently available information, it is unclear whether this variant is a pathogenic variant or a rare benign variant. -

CDK5RAP2-related disorder

Uncertain:1

Uncertain significance, no assertion criteria provided

clinical testing

PreventionGenetics, part of Exact Sciences

Apr 24, 2024

The CDK5RAP2 c.5584G>A variant is predicted to result in the amino acid substitution p.Val1862Ile. To our knowledge, this variant has not been reported in the literature. This variant is reported in 0.12% of alleles in individuals of African descent in gnomAD. Although we suspect that this variant may be benign, at this time, the clinical significance of this variant is uncertain due to the absence of conclusive functional and genetic evidence. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.082

BayesDel_addAF

Benign

-0.62

BayesDel_noAF

Benign

-0.70

CADD

Benign

DANN

Benign

0.67

DEOGEN2

Benign

0.090

.;T;.;.;.

Eigen

Benign

-0.92

Eigen_PC

Benign

-0.86

FATHMM_MKL

Benign

0.037

LIST_S2

Benign

0.73

T;T;T;T;T

M_CAP

Benign

0.0040

MetaRNN

Benign

0.0068

T;T;T;T;T

MetaSVM

Benign

-0.98

MutationAssessor

Benign

-0.29

.;N;.;.;.

MutationTaster

Benign

1.0

N;N;N;N

PrimateAI

Benign

0.38

PROVEAN

Benign

-0.030

.;N;N;N;N

REVEL

Benign

0.049

Sift

Benign

0.88

.;T;T;T;T

Sift4G

Benign

0.43

T;T;T;T;T

Polyphen

0.027, 0.061, 0.11, 0.023

.;B;B;B;B

Vest4

0.088

MVP

0.11

MPC

0.31

ClinPred

0.035

GERP RS

0.077

RBP_binding_hub_radar

0.92

RBP_regulation_power_radar

2.0

Varity_R

0.012

gMVP

0.026

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.17

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