Genetic Variant CLK1:p.Arg449His (chr2-200853415-C-T) – ACMG Classification: Uncertain_significance (0 pts)

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2BP4_Moderate

The NM_004071.4(CLK1):c.1346G>A(p.Arg449His) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000275 in 1,454,366 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 16/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R449C) has been classified as Likely benign.

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 0.000028 ( 0 hom. )

Consequence

CLK1
NM_004071.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 1.17

Variant links:

Genes affected

CLK1 (HGNC:2068): (CDC like kinase 1) This gene encodes a member of the CDC2-like (or LAMMER) family of dual specificity protein kinases. In the nucleus, the encoded protein phosphorylates serine/arginine-rich proteins involved in pre-mRNA processing, releasing them into the nucleoplasm. The choice of splice sites during pre-mRNA processing may be regulated by the concentration of transacting factors, including serine/arginine rich proteins. Therefore, the encoded protein may play an indirect role in governing splice site selection. Multiple transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Jun 2009]

CLK1 links:

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ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 0 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.102118164).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CLK1	NM_004071.4 link	c.1346G>A	p.Arg449His	missense_variant	Exon 13 of 13	ENST00000321356.9	NP_004062.2	P49759-1
CLK1	NM_001162407.1 link	c.1472G>A	p.Arg491His	missense_variant	Exon 13 of 13		NP_001155879.1	P49759-3
CLK1	NR_027855.2 link	n.1350G>A		non_coding_transcript_exon_variant	Exon 12 of 12
CLK1	NR_027856.2 link	n.2841G>A		non_coding_transcript_exon_variant	Exon 11 of 11

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
CLK1	ENST00000321356.9 link	c.1346G>A	p.Arg449His	missense_variant	Exon 13 of 13	1	NM_004071.4	ENSP00000326830.4		P49759-1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD3 exomes

AF:

0.0000247

AC:

AN:

242638

Hom.:

AF XY:

0.0000153

AC XY:

AN XY:

130938

show subpopulations

Gnomad AFR exome

AF:

0.000124

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:

0.0000269

Gnomad OTH exome

AF:

0.000168

GnomAD4 exome

AF:

0.0000275

AC:

AN:

1454366

Hom.:

Cov.:

AF XY:

0.0000304

AC XY:

AN XY:

723158

show subpopulations

Gnomad4 AFR exome

AF:

0.0000605

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000119

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000306

Gnomad4 OTH exome

AF:

0.0000333

GnomAD4 genome

Cov.:

Bravo

AF:

0.00000756

ExAC

AF:

0.00000824

AC:

EpiCase

AF:

0.0000546

EpiControl

AF:

0.0000593

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Jun 17, 2024

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.1472G>A (p.R491H) alteration is located in exon 13 (coding exon 13) of the CLK1 gene. This alteration results from a G to A substitution at nucleotide position 1472, causing the arginine (R) at amino acid position 491 to be replaced by a histidine (H). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.070

BayesDel_addAF

Benign

-0.36

BayesDel_noAF

Benign

-0.52

CADD

Benign

DANN

Benign

0.89

DEOGEN2

Benign

0.10

T;T;T;.

Eigen

Benign

-1.0

Eigen_PC

Benign

-0.88

FATHMM_MKL

Benign

0.55

LIST_S2

Benign

0.69

T;T;T;T

M_CAP

Benign

0.031

MetaRNN

Benign

0.10

T;T;T;T

MetaSVM

Benign

-1.0

MutationAssessor

Benign

0.56

N;.;.;.

PrimateAI

Benign

0.34

PROVEAN

Benign

-0.58

N;.;N;N

REVEL

Benign

0.12

Sift

Benign

0.12

T;.;T;T

Sift4G

Benign

0.12

T;T;T;T

Polyphen

0.0

B;.;B;.

Vest4

0.041

MVP

0.53

MPC

0.31

ClinPred

0.030

GERP RS

1.1

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.22

gMVP

0.18

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.030

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