rs143946953

chr9-120407245-G-A

Variant summary

Our verdict is Likely benign. Variant got -5 ACMG points: 0P and 5B. BP4_StrongBS1_Supporting

The NM_018249.6(CDK5RAP2):c.4730C>T(p.Ala1577Val) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0012 in 1,609,356 control chromosomes in the GnomAD database, including 4 homozygotes. 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: 𝑓 0.00066 ( 0 hom., cov: 33)

Exomes 𝑓: 0.0013 ( 4 hom. )

Consequence

CDK5RAP2
NM_018249.6 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:4

Conservation

PhyloP100: 0.395

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 -5 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.009485275).

BS1

Variant frequency is greater than expected in population nfe. gnomad4 allele frequency = 0.000657 (100/152262) while in subpopulation NFE AF= 0.00123 (84/68016). AF 95% confidence interval is 0.00102. There are 0 homozygotes in gnomad4. There are 37 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.4730C>T	p.Ala1577Val	missense_variant	32/38	ENST00000349780.9

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
CDK5RAP2	ENST00000349780.9 linkuse as main transcript	c.4730C>T	p.Ala1577Val	missense_variant	32/38	1	NM_018249.6	P4	Q96SN8-1

Frequencies

GnomAD3 genomes

AF:

0.000664

AC:

101

AN:

152144

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000193

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000131

Gnomad ASJ

AF:

0.00115

Gnomad EAS

AF:

0.000192

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.0000943

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00123

Gnomad OTH

AF:

0.000479

GnomAD3 exomes

AF:

0.000688

AC:

171

AN:

248602

Hom.:

AF XY:

0.000735

AC XY:

AN XY:

134622

show subpopulations

Gnomad AFR exome

AF:

0.0000616

Gnomad AMR exome

AF:

0.000116

Gnomad ASJ exome

AF:

0.000497

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.000253

Gnomad NFE exome

AF:

0.00137

Gnomad OTH exome

AF:

0.000163

GnomAD4 exome

AF:

0.00126

AC:

1829

AN:

1457094

Hom.:

Cov.:

AF XY:

0.00122

AC XY:

884

AN XY:

725200

show subpopulations

Gnomad4 AFR exome

AF:

0.000209

Gnomad4 AMR exome

AF:

0.000112

Gnomad4 ASJ exome

AF:

0.000306

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.000293

Gnomad4 NFE exome

AF:

0.00157

Gnomad4 OTH exome

AF:

0.000796

GnomAD4 genome

AF:

0.000657

AC:

100

AN:

152262

Hom.:

Cov.:

AF XY:

0.000497

AC XY:

AN XY:

74444

show subpopulations

Gnomad4 AFR

AF:

0.000193

Gnomad4 AMR

AF:

0.0000654

Gnomad4 ASJ

AF:

0.00115

Gnomad4 EAS

AF:

0.000193

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.0000943

Gnomad4 NFE

AF:

0.00123

Gnomad4 OTH

AF:

0.000474

Alfa

AF:

0.00106

Hom.:

Bravo

AF:

0.000593

TwinsUK

AF:

0.00162

AC:

ALSPAC

AF:

0.000778

AC:

ESP6500AA

AF:

0.000454

AC:

ESP6500EA

AF:

0.000930

AC:

ExAC

AF:

0.000791

AC:

Asia WGS

AF:

0.000289

AC:

AN:

3478

EpiCase

AF:

0.000981

EpiControl

AF:

0.000889

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:4

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Genetic Services Laboratory, University of Chicago

Jul 22, 2015

- -

Microcephaly 3, primary, autosomal recessive

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Revvity Omics, Revvity

Mar 21, 2023

- -

Primary Microcephaly, Recessive

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Jun 14, 2016

- -

not provided

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Invitae

Oct 19, 2022

This sequence change replaces alanine, which is neutral and non-polar, with valine, which is neutral and non-polar, at codon 1577 of the CDK5RAP2 protein (p.Ala1577Val). This variant is present in population databases (rs143946953, gnomAD 0.1%), and has an allele count higher than expected for a pathogenic variant. 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: 210638). Algorithms developed to predict the effect of missense changes on protein structure and function are either unavailable or do not agree on the potential impact of this missense change (SIFT: "Tolerated"; PolyPhen-2: "Possibly Damaging"; Align-GVGD: "Class C0"). 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. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.12

BayesDel_addAF

Benign

-0.58

BayesDel_noAF

Benign

-0.64

Cadd

Benign

Dann

Uncertain

0.98

Eigen

Benign

-0.70

Eigen_PC

Benign

-0.75

FATHMM_MKL

Benign

0.12

LIST_S2

Benign

0.74

T;T;T;T

M_CAP

Benign

0.0045

MetaRNN

Benign

0.0095

T;T;T;T

MetaSVM

Benign

-0.96

MutationTaster

Benign

1.0

N;N;N;N

PrimateAI

Benign

0.26

REVEL

Benign

0.072

Sift4G

Benign

0.079

T;T;T;T

Polyphen

0.0070, 0.023, 0.013

.;B;B;B

Vest4

0.21

MVP

0.38

MPC

0.22

ClinPred

0.035

GERP RS

1.8

Varity_R

0.060

gMVP

0.086

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