1-150805997-T-G

Position:

chr1-150805997-T-G

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 4P and 3B. PM1PM2BP4_ModerateBS1_Supporting

The NM_000396.4(CTSK):c.263A>C(p.Gln88Pro) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000669 in 1,614,234 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★).

Frequency

Genomes: 𝑓 0.000046 ( 0 hom., cov: 31)

Exomes 𝑓: 0.000069 ( 0 hom. )

Consequence

CTSK
NM_000396.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:5

Conservation

PhyloP100: 0.506

Variant links:

Genes affected

CTSK (HGNC:2536): (cathepsin K) The protein encoded by this gene is a lysosomal cysteine proteinase involved in bone remodeling and resorption. This protein, which is a member of the peptidase C1 protein family, is predominantly expressed in osteoclasts. However, the encoded protein is also expressed in a significant fraction of human breast cancers, where it could contribute to tumor invasiveness. Mutations in this gene are the cause of pycnodysostosis, an autosomal recessive disease characterized by osteosclerosis and short stature. [provided by RefSeq, Apr 2013]

CTSK links:

CTSK (HGNC:):

CTSK links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 1 ACMG points.

PM1

In a propeptide Activation peptide (size 98) in uniprot entity CATK_HUMAN there are 10 pathogenic changes around while only 2 benign (83%) in NM_000396.4

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.093060195).

BS1

Variant frequency is greater than expected in population sas. gnomad4 allele frequency = 0.0000459 (7/152346) while in subpopulation SAS AF= 0.00145 (7/4832). AF 95% confidence interval is 0.000679. There are 0 homozygotes in gnomad4. There are 5 alleles in male gnomad4 subpopulation. Median coverage is 31. 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	Protein	UniProt
CTSK	NM_000396.4 linkuse as main transcript	c.263A>C	p.Gln88Pro	missense_variant	4/8	ENST00000271651.8	NP_000387.1	P43235

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
CTSK	ENST00000271651.8 linkuse as main transcript	c.263A>C	p.Gln88Pro	missense_variant	4/8	1	NM_000396.4	ENSP00000271651.3		P43235

Frequencies

GnomAD3 genomes

AF:

0.0000460

AC:

AN:

152228

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:

0.00145

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.000123

AC:

AN:

251436

Hom.:

AF XY:

0.000184

AC XY:

AN XY:

135886

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:

0.000980

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00000879

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000691

AC:

101

AN:

1461888

Hom.:

Cov.:

AF XY:

0.000105

AC XY:

AN XY:

727246

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:

0.00107

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

8.99e-7

Gnomad4 OTH exome

AF:

0.000132

GnomAD4 genome

AF:

0.0000459

AC:

AN:

152346

Hom.:

Cov.:

AF XY:

0.0000671

AC XY:

AN XY:

74506

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:

0.00145

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000496

Hom.:

Bravo

AF:

0.00000378

ExAC

AF:

0.000173

AC:

Asia WGS

AF:

0.000866

AC:

AN:

3478

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:5

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Pyknodysostosis

Uncertain:4

Uncertain significance, criteria provided, single submitter	clinical testing	Genome-Nilou Lab	Apr 11, 2023	- -
Uncertain significance, criteria provided, single submitter	clinical testing	Human Genetics Unit, University Of Colombo	Dec 28, 2023	This variant was observed in compound heterozygosity with variant (NM_000396.3:c.568C>T) -
Uncertain significance, criteria provided, single submitter	clinical testing	Counsyl	Nov 14, 2017	- -
Uncertain significance, no assertion criteria provided	clinical testing	Natera, Inc.	Feb 20, 2020	- -

not specified

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Women's Health and Genetics/Laboratory Corporation of America, LabCorp

Jul 26, 2021

Variant summary: CTSK c.263A>C (p.Gln88Pro) results in a non-conservative amino acid change located in the CTSK proregion (Pangrazio_2014) of the encoded protein sequence. Three of five in-silico tools predict a damaging effect of the variant on protein function. The variant allele was found at a frequency of 0.00012 in 251436 control chromosomes. This frequency is not significantly higher than estimated for a pathogenic variant in CTSK causing Pyknodysostosis (0.00012 vs 0.0011), allowing no conclusion about variant significance. c.263A>C has been reported in the literature in at-least one comprehensively genotyped (WES) homozygous individual affected with mild Osteoporosis (example, Pangrazio_2014) and subsequently cited by others. These data indicate that the variant may be associated with disease. To our knowledge, no experimental evidence demonstrating an impact on protein function has been reported. One clinical diagnostic laboratory has submitted clinical-significance assessments for this variant to ClinVar after 2014 without evidence for independent evaluation and classified the variant as uncertain significance citing overlapping evidence utilized in the context of this evaluation. Based on the evidence outlined above, the variant was classified as VUS-possibly pathogenic. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Uncertain

0.50

BayesDel_addAF

Uncertain

0.028

BayesDel_noAF

Pathogenic

0.21

CADD

Uncertain

DANN

Uncertain

0.99

DEOGEN2

Uncertain

0.55

D;T

Eigen

Benign

0.021

Eigen_PC

Benign

0.15

FATHMM_MKL

Uncertain

0.97

LIST_S2

Benign

0.80

T;T

M_CAP

Uncertain

0.20

MetaRNN

Benign

0.093

T;T

MetaSVM

Uncertain

0.57

MutationAssessor

Uncertain

2.1

M;.

PrimateAI

Uncertain

0.53

PROVEAN

Uncertain

-3.4

D;D

REVEL

Pathogenic

0.86

Sift

Uncertain

0.010

D;D

Sift4G

Benign

0.11

T;.

Polyphen

0.093

B;.

Vest4

0.70

MutPred

0.42

Gain of ubiquitination at K89 (P = 0.0598);.;

MVP

0.99

MPC

0.40

ClinPred

0.099

GERP RS

4.3

Varity_R

0.91

gMVP

0.86

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