Genetic Variant NM_018249.6:c.5626C>T (chr9-120389292-G-A) – ACMG Classification: Uncertain_significance (3 pts)

Variant summary

Our verdict is Uncertain significance. The variant received 3 ACMG points: 3P and 0B. PM2PP3

The NM_018249.6(CDK5RAP2):c.5626C>T(p.Leu1876Phe) variant causes a missense, splice region change. The variant allele was found at a frequency of 0.00000206 in 1,459,446 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 2/3 splice prediction tools predicting alterations to normal splicing. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. L1876V) has been classified as Uncertain significance.

Frequency

Genomes: not found (cov: 33)

Exomes 𝑓: 0.0000021 ( 0 hom. )

Consequence

CDK5RAP2
NM_018249.6 missense, splice_region

Scores

Splicing: ADA: 0.9755

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 4.18

Publications

1 publications found

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 Gene-Disease associations (from GenCC):

autosomal recessive primary microcephaly
Inheritance: AR Classification: DEFINITIVE, SUPPORTIVE Submitted by: Orphanet, ClinGen
microcephaly 3, primary, autosomal recessive
Inheritance: AR Classification: STRONG, MODERATE Submitted by: Labcorp Genetics (formerly Invitae), G2P, Ambry Genetics
corpus callosum, agenesis of
Inheritance: AR Classification: LIMITED Submitted by: Ambry Genetics

CDK5RAP2 links:

ENSG00000301087 (HGNC:):

ENSG00000301087 links:

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ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 3 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP3

Splicing predictors support a deleterious effect. Scorers claiming Pathogenic: dbscSNV1_ADA, dbscSNV1_RF. No scorers claiming Uncertain. Scorers claiming Benign: max_spliceai.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CDK5RAP2	NM_018249.6 link	c.5626C>T	p.Leu1876Phe	missense_variant, splice_region_variant	Exon 38 of 38	ENST00000349780.9	NP_060719.4	Q96SN8-1B3KVI2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
CDK5RAP2	ENST00000349780.9 link	c.5626C>T	p.Leu1876Phe	missense_variant, splice_region_variant	Exon 38 of 38	1	NM_018249.6	ENSP00000343818.4		Q96SN8-1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD2 exomes

AF:

0.00000810

AC:

AN:

246878

AF XY:

0.00000750

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000179

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000206

AC:

AN:

1459446

Hom.:

Cov.:

AF XY:

0.00000138

AC XY:

AN XY:

725762

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33442

American (AMR)

AF:

0.00

AC:

AN:

44498

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26048

East Asian (EAS)

AF:

0.00

AC:

AN:

39684

South Asian (SAS)

AF:

0.00

AC:

AN:

85734

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53314

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5760

European-Non Finnish (NFE)

AF:

0.00000270

AC:

AN:

1110674

Other (OTH)

AF:

0.00

AC:

AN:

60292

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.442

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

Cov.:

ExAC

AF:

0.0000165

AC:

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.20

BayesDel_addAF

Benign

-0.072

BayesDel_noAF

Benign

-0.33

CADD

Pathogenic

(source)

DANN

Uncertain

1.0

DEOGEN2

Benign

0.25

.;T;.;.;.

Eigen

Uncertain

0.54

Eigen_PC

Uncertain

0.49

FATHMM_MKL

Uncertain

0.94

LIST_S2

Uncertain

0.88

D;D;D;D;D

M_CAP

Benign

0.015

MetaRNN

Benign

0.26

T;T;T;T;T

MetaSVM

Benign

-0.93

MutationAssessor

Uncertain

2.2

.;M;.;.;.

PhyloP100

4.2

PrimateAI

Uncertain

0.52

PROVEAN

Uncertain

-2.4

.;N;N;N;D

REVEL

Benign

0.17

Sift

Uncertain

0.0050

.;D;D;D;D

Sift4G

Uncertain

0.013

D;D;D;D;D

Polyphen

1.0, 1.0, 0.99

.;D;D;D;D

Vest4

0.47

MutPred

0.17

.;Gain of methylation at R1877 (P = 0.098);.;.;.;

MVP

0.52

MPC

0.44

ClinPred

0.72

GERP RS

5.3

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.11

gMVP

0.054

Mutation Taster

=64/36

polymorphism

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

dbscSNV1_ADA

Pathogenic

0.98

dbscSNV1_RF

Pathogenic

0.82

SpliceAI score (max)

0.080

Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

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NM_018249.6:c.5626C>T

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over