2-112738995-C-T

Variant names:

Variant summary

Our verdict is Uncertain significance. Variant got 4 ACMG points: 4P and 0B. PM2PP5_Moderate

The NM_152515.5(CKAP2L):c.2066G>A(p.Arg689His) variant causes a missense change. The variant allele was found at a frequency of 0.000107 in 1,614,032 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Pathogenic (★).

Frequency

Genomes: 𝑓 0.000072 ( 0 hom., cov: 33)

Exomes 𝑓: 0.00011 ( 0 hom. )

Consequence

CKAP2L
NM_152515.5 missense

Scores

Clinical Significance

Pathogenic criteria provided, single submitter P:1U:1

Conservation

PhyloP100: 4.92

Variant links:

Genes affected

CKAP2L (HGNC:26877): (cytoskeleton associated protein 2 like) The protein encoded by this gene is thought to be a mitotic spindle protein important to neural stem or progenitor cells. Mutations in this gene have been associated with spindle organization defects, including mitotic spindle defects, lagging chromosomes, and chromatin bridges. There is evidence that mutations in this gene are associated with Filippi syndrome, characterized by growth defects, microcephaly, intellectual disability, facial feature defects, and syndactyly. There is a pseudogene of this gene on chromosome 20. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Jan 2015]

CKAP2L links:

NT5DC4 (HGNC:27678): (5'-nucleotidase domain containing 4) Predicted to enable 5'-nucleotidase activity. Predicted to be involved in dephosphorylation. [provided by Alliance of Genome Resources, Apr 2022]

NT5DC4 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 4 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP5

Variant 2-112738995-C-T is Pathogenic according to our data. Variant chr2-112738995-C-T is described in ClinVar as [Pathogenic]. Clinvar id is 1040806.Status of the report is criteria_provided_single_submitter, 1 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CKAP2L	NM_152515.5 link	c.2066G>A	p.Arg689His	missense_variant	Exon 9 of 9	ENST00000302450.11	NP_689728.3	Q8IYA6-1
NT5DC4	NM_001393655.1 link	c.*59C>T		3_prime_UTR_variant	Exon 17 of 17	ENST00000688554.1	NP_001380584.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
CKAP2L	ENST00000302450.11 link	c.2066G>A	p.Arg689His	missense_variant	Exon 9 of 9	1	NM_152515.5	ENSP00000305204.6		Q8IYA6-1
NT5DC4	ENST00000688554.1 link	c.*59C>T		3_prime_UTR_variant	Exon 17 of 17		NM_001393655.1	ENSP00000509504.1		A0A8I5KS70

Frequencies

GnomAD3 genomes

AF:

0.0000723

AC:

AN:

152166

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

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:

0.000162

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000318

AC:

AN:

251456

Hom.:

AF XY:

0.0000441

AC XY:

AN XY:

135902

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 SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000703

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.000111

AC:

162

AN:

1461866

Hom.:

Cov.:

AF XY:

0.000103

AC XY:

AN XY:

727240

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000232

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.000131

Gnomad4 OTH exome

AF:

0.000232

GnomAD4 genome

AF:

0.0000723

AC:

AN:

152166

Hom.:

Cov.:

AF XY:

0.000108

AC XY:

AN XY:

74328

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.000162

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000135

Hom.:

Bravo

AF:

0.0000756

ESP6500AA

AF:

0.000227

AC:

ESP6500EA

AF:

0.00

AC:

ExAC

AF:

0.0000330

AC:

EpiCase

AF:

0.0000545

EpiControl

AF:

0.0000593

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:1Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not provided

Pathogenic:1

Jun 26, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change replaces arginine, which is basic and polar, with histidine, which is basic and polar, at codon 689 of the CKAP2L protein (p.Arg689His). This variant is present in population databases (rs201984824, gnomAD 0.004%). This missense change has been observed in individual(s) with CKAP2L-related conditions (PMID: 34921061; Invitae). In at least one individual the data is consistent with being in trans (on the opposite chromosome) from a pathogenic variant. It has also been observed to segregate with disease in related individuals. ClinVar contains an entry for this variant (Variation ID: 1040806). Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) performed at Invitae indicates that this missense variant is expected to disrupt CKAP2L protein function with a positive predictive value of 80%. For these reasons, this variant has been classified as Pathogenic. -

Filippi syndrome

Uncertain:1

Sanford Medical Genetics Laboratory, Sanford Health

Significance: Uncertain significance

Review Status: no assertion criteria provided

Collection Method: clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.67

BayesDel_addAF

Benign

-0.076

BayesDel_noAF

Benign

-0.22

CADD

Uncertain

DANN

Pathogenic

1.0

DEOGEN2

Benign

0.10

Eigen

Uncertain

0.22

Eigen_PC

Uncertain

0.24

FATHMM_MKL

Uncertain

0.95

LIST_S2

Uncertain

0.94

M_CAP

Benign

0.058

MetaRNN

Uncertain

0.73

MetaSVM

Benign

-0.79

MutationAssessor

Pathogenic

3.3

PrimateAI

Uncertain

0.63

PROVEAN

Uncertain

-4.1

REVEL

Benign

0.17

Sift

Pathogenic

0.0

Sift4G

Pathogenic

0.0

Polyphen

0.76

Vest4

0.88

MVP

0.45

MPC

0.40

ClinPred

0.98

GERP RS

4.6

Varity_R

0.60

gMVP

0.67

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

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