NM_018451.5:c.68A>G

Variant names:

Variant summary

Our verdict is Benign. The variant received -20 ACMG points: 0P and 20B. BP4_StrongBP6_Very_StrongBS1BS2

The NM_018451.5(CPAP):c.68A>G(p.Asn23Ser) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0027 in 1,614,208 control chromosomes in the GnomAD database, including 73 homozygotes. 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 Likely benign (★★).

Frequency

Genomes: 𝑓 0.0031 ( 8 hom., cov: 32)

Exomes 𝑓: 0.0027 ( 65 hom. )

Consequence

CPAP
NM_018451.5 missense

Scores

Clinical Significance

Benign/Likely benign criteria provided, multiple submitters, no conflicts B:10

Conservation

PhyloP100: 0.0280

Publications

5 publications found

Variant links:

Genes affected

CPAP (HGNC:17272): (centromere protein J) This gene encodes a protein that belongs to the centromere protein family. During cell division, this protein plays a structural role in the maintenance of centrosome integrity and normal spindle morphology, and it is involved in microtubule disassembly at the centrosome. This protein can function as a transcriptional coactivator in the Stat5 signaling pathway, and also as a coactivator of NF-kappaB-mediated transcription, likely via its interaction with the coactivator p300/CREB-binding protein. Mutations in this gene are associated with primary autosomal recessive microcephaly, a disorder characterized by severely reduced brain size and cognitive disability. Alternatively spliced transcript variants have been found for this gene. [provided by RefSeq, Apr 2012]

CPAP Gene-Disease associations (from GenCC):

microcephaly 6 with or without short stature
Inheritance: AR Classification: DEFINITIVE Submitted by: ClinGen
microcephaly 6, primary, autosomal recessive
Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: Labcorp Genetics (formerly Invitae), G2P
autosomal recessive primary microcephaly
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
Seckel syndrome
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

CPAP links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -20 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.0038710237).

BP6

Variant 13-24912958-T-C is Benign according to our data. Variant chr13-24912958-T-C is described in ClinVar as Benign/Likely_benign. ClinVar VariationId is 158219.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BS1

Variant frequency is greater than expected in population eas. GnomAd4 allele frequency = 0.00314 (478/152334) while in subpopulation EAS AF = 0.0237 (123/5182). AF 95% confidence interval is 0.0203. There are 8 homozygotes in GnomAd4. There are 271 alleles in the male GnomAd4 subpopulation. Median coverage is 32. This position passed quality control check.

BS2

High Homozygotes in GnomAd4 at 8 AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CPAP	NM_018451.5 link	c.68A>G	p.Asn23Ser	missense_variant	Exon 2 of 17	ENST00000381884.9	NP_060921.3	Q9HC77-1A8K8P1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
CENPJ	ENST00000381884.9 link	c.68A>G	p.Asn23Ser	missense_variant	Exon 2 of 17	1	NM_018451.5	ENSP00000371308.4	Q9HC77-1
CENPJ	ENST00000616936.4 link	n.68A>G		non_coding_transcript_exon_variant	Exon 2 of 16	1		ENSP00000477511.1	Q9HC77-2
CENPJ	ENST00000545981.6 link	n.68A>G		non_coding_transcript_exon_variant	Exon 2 of 18	2		ENSP00000441090.2	F6VUX8

Frequencies

GnomAD3 genomes

AF:

0.00311

AC:

474

AN:

152216

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000796

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0146

Gnomad ASJ

AF:

0.000576

Gnomad EAS

AF:

0.0237

Gnomad SAS

AF:

0.00352

Gnomad FIN

AF:

0.00367

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000412

Gnomad OTH

AF:

0.00430

GnomAD2 exomes

AF:

0.00674

AC:

1692

AN:

251084

AF XY:

0.00552

show subpopulations

Gnomad AFR exome

AF:

0.000923

Gnomad AMR exome

AF:

0.0277

Gnomad ASJ exome

AF:

0.00119

Gnomad EAS exome

AF:

0.0242

Gnomad FIN exome

AF:

0.00458

Gnomad NFE exome

AF:

0.000767

Gnomad OTH exome

AF:

0.00506

GnomAD4 exome

AF:

0.00266

AC:

3886

AN:

1461874

Hom.:

Cov.:

AF XY:

0.00251

AC XY:

1828

AN XY:

727234

show subpopulations

African (AFR)

AF:

0.000717

AC:

AN:

33480

American (AMR)

AF:

0.0258

AC:

1154

AN:

44722

Ashkenazi Jewish (ASJ)

AF:

0.000612

AC:

AN:

26136

East Asian (EAS)

AF:

0.0425

AC:

1687

AN:

39698

South Asian (SAS)

AF:

0.00184

AC:

159

AN:

86254

European-Finnish (FIN)

AF:

0.00530

AC:

283

AN:

53418

Middle Eastern (MID)

AF:

0.000173

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

0.000383

AC:

426

AN:

1112002

Other (OTH)

AF:

0.00225

AC:

136

AN:

60396

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.485

Heterozygous variant carriers

234

467

701

934

1168

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

Variant carriers

104

156

208

260

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.00314

AC:

478

AN:

152334

Hom.:

Cov.:

AF XY:

0.00364

AC XY:

271

AN XY:

74498

show subpopulations

African (AFR)

AF:

0.000794

AC:

AN:

41574

American (AMR)

AF:

0.0148

AC:

226

AN:

15304

Ashkenazi Jewish (ASJ)

AF:

0.000576

AC:

AN:

3472

East Asian (EAS)

AF:

0.0237

AC:

123

AN:

5182

South Asian (SAS)

AF:

0.00373

AC:

AN:

4832

European-Finnish (FIN)

AF:

0.00367

AC:

AN:

10624

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.000412

AC:

AN:

68026

Other (OTH)

AF:

0.00426

AC:

AN:

2114

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.513

Heterozygous variant carriers

100

125

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Genome Hom

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.00145

Hom.:

Bravo

AF:

0.00436

ESP6500AA

AF:

0.000681

AC:

ESP6500EA

AF:

0.000349

AC:

ExAC

AF:

0.00604

AC:

733

Asia WGS

AF:

0.0180

AC:

AN:

3478

EpiCase

AF:

0.000218

EpiControl

AF:

0.000296

ClinVar

Significance: Benign/Likely benign

Submissions summary: Benign:10

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not specified

Benign:4

Apr 08, 2014

Eurofins Ntd Llc (ga)

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

PreventionGenetics, part of Exact Sciences

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Feb 08, 2013

Genetic Services Laboratory, University of Chicago

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Sep 27, 2024

Athena Diagnostics

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

not provided

Benign:3

Breakthrough Genomics, Breakthrough Genomics

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:not provided

- -

Jan 30, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Mar 03, 2015

GeneDx

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Microcephaly 6, primary, autosomal recessive;C3888212:Seckel syndrome 4

Benign:1

Sep 29, 2021

Fulgent Genetics, Fulgent Genetics

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Seckel syndrome 4

Benign:1

Jan 12, 2018

Illumina Laboratory Services, Illumina

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score and internal cut-off values, a variant classified as benign is not then subjected to further curation. The score for this variant resulted in a classification of benign for this disease. -

Microcephaly 6, primary, autosomal recessive

Benign:1

Jan 12, 2018

Illumina Laboratory Services, Illumina

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.059

BayesDel_addAF

Benign

-0.73

BayesDel_noAF

Benign

-0.78

CADD

Benign

5.4

(source)

DANN

Benign

0.80

DEOGEN2

Benign

0.0075

.;T;T

Eigen

Benign

-0.87

Eigen_PC

Benign

-0.73

FATHMM_MKL

Benign

0.58

LIST_S2

Benign

0.71

T;T;T

MetaRNN

Benign

0.0039

T;T;T

MetaSVM

Benign

-0.99

MutationAssessor

Benign

0.58

N;N;.

PhyloP100

0.028

PrimateAI

Benign

0.30

PROVEAN

Benign

-1.1

.;N;N

REVEL

Benign

0.068

Sift

Benign

0.49

.;T;T

Sift4G

Benign

0.66

T;T;T

Polyphen

0.0010

.;B;.

Vest4

0.14

MVP

0.19

MPC

0.098

ClinPred

0.0013

GERP RS

-2.7

Varity_R

0.021

gMVP

0.094

Mutation Taster

=99/1

polymorphism

(source)

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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over