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

19

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:2

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]

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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
CDK5RAP2NM_018249.6 linkuse as main transcriptc.5584G>A p.Val1862Ile missense_variant 37/38 ENST00000349780.9

Ensembl

Gene Transcript HGVSc HGVSp Effect #exon/exons TSL MANE Appris UniProt
CDK5RAP2ENST00000349780.9 linkuse as main transcriptc.5584G>A p.Val1862Ile missense_variant 37/381 NM_018249.6 P4Q96SN8-1

Frequencies

GnomAD3 genomes
AF:
0.000296
AC:
45
AN:
152174
Hom.:
0
Cov.:
33
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:
29
AN:
251440
Hom.:
0
AF XY:
0.000118
AC XY:
16
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:
78
AN:
1461702
Hom.:
0
Cov.:
31
AF XY:
0.0000536
AC XY:
39
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:
45
AN:
152292
Hom.:
0
Cov.:
33
AF XY:
0.000309
AC XY:
23
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.:
0
Bravo
AF:
0.000329
ESP6500AA
AF:
0.000908
AC:
4
ESP6500EA
AF:
0.00
AC:
0
ExAC
AF:
0.000115
AC:
14

ClinVar

Significance: Uncertain significance
Submissions summary: Uncertain:2
Revision: criteria provided, multiple submitters, no conflicts
LINK: link

Submissions by phenotype

not provided Uncertain:2
Uncertain significance, criteria provided, single submitterclinical testingInvitaeApr 23, 2022This 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 submitterclinical testingGeneDxSep 22, 2015A 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. -

Computational scores

Source: dbNSFP v4.3

Name
Calibrated prediction
Score
Prediction
AlphaMissense
Benign
0.082
BayesDel_addAF
Benign
-0.62
T
BayesDel_noAF
Benign
-0.70
CADD
Benign
13
DANN
Benign
0.67
DEOGEN2
Benign
0.090
.;T;.;.;.
Eigen
Benign
-0.92
Eigen_PC
Benign
-0.86
FATHMM_MKL
Benign
0.037
N
LIST_S2
Benign
0.73
T;T;T;T;T
M_CAP
Benign
0.0040
T
MetaRNN
Benign
0.0068
T;T;T;T;T
MetaSVM
Benign
-0.98
T
MutationAssessor
Benign
-0.29
.;N;.;.;.
MutationTaster
Benign
1.0
N;N;N;N
PrimateAI
Benign
0.38
T
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
T
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.

Other links and lift over

dbSNP: rs147082653; hg19: chr9-123152060; API