chr17-8234553-G-A

Position:

chr17-8234553-G-A

Variant summary

Our verdict is Benign. Variant got -9 ACMG points: 0P and 9B. BP4_StrongBP6BS2

The NM_025099.6(CTC1):c.1720C>T(p.Pro574Ser) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00153 in 1,584,618 control chromosomes in the GnomAD database, including 2 homozygotes. In-silico tool predicts a benign outcome for this variant. 13/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

Frequency

Genomes: 𝑓 0.0011 ( 0 hom., cov: 32)

Exomes 𝑓: 0.0016 ( 2 hom. )

Consequence

CTC1
NM_025099.6 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:3B:5

Conservation

PhyloP100: 3.16

Variant links:

Genes affected

CTC1 (HGNC:26169): (CST telomere replication complex component 1) This gene encodes a component of the CST complex. This complex plays an essential role in protecting telomeres from degradation. This protein also forms a heterodimer with the CST complex subunit STN1 to form the enzyme alpha accessory factor. This enzyme regulates DNA replication. Mutations in this gene are the cause of cerebroretinal microangiopathy with calcifications and cysts. Alternate splicing results in both coding and non-coding variants. [provided by RefSeq, Mar 2012]

CTC1 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -9 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.010326743).

BP6

Variant 17-8234553-G-A is Benign according to our data. Variant chr17-8234553-G-A is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 412531.We mark this variant Likely_benign, oryginal submissions are: {Benign=1, Uncertain_significance=3, Likely_benign=4}.

BS2

High Homozygotes in GnomAdExome4 at 2 AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
CTC1	NM_025099.6 linkuse as main transcript	c.1720C>T	p.Pro574Ser	missense_variant	10/23	ENST00000651323.1	NP_079375.3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
CTC1	ENST00000651323.1 linkuse as main transcript	c.1720C>T	p.Pro574Ser	missense_variant	10/23		NM_025099.6	ENSP00000498499	P1	Q2NKJ3-1

Frequencies

GnomAD3 genomes

AF:

0.00114

AC:

174

AN:

152238

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000265

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00157

Gnomad ASJ

AF:

0.00259

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000207

Gnomad FIN

AF:

0.000659

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00172

Gnomad OTH

AF:

0.00239

GnomAD3 exomes

AF:

0.00120

AC:

240

AN:

199770

Hom.:

AF XY:

0.00117

AC XY:

126

AN XY:

107478

show subpopulations

Gnomad AFR exome

AF:

0.000345

Gnomad AMR exome

AF:

0.00210

Gnomad ASJ exome

AF:

0.00329

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.000267

Gnomad FIN exome

AF:

0.000515

Gnomad NFE exome

AF:

0.00142

Gnomad OTH exome

AF:

0.00136

GnomAD4 exome

AF:

0.00157

AC:

2248

AN:

1432262

Hom.:

Cov.:

AF XY:

0.00153

AC XY:

1088

AN XY:

709700

show subpopulations

Gnomad4 AFR exome

AF:

0.000212

Gnomad4 AMR exome

AF:

0.00191

Gnomad4 ASJ exome

AF:

0.00368

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.000339

Gnomad4 FIN exome

AF:

0.000563

Gnomad4 NFE exome

AF:

0.00175

Gnomad4 OTH exome

AF:

0.00163

GnomAD4 genome

AF:

0.00114

AC:

174

AN:

152356

Hom.:

Cov.:

AF XY:

0.00102

AC XY:

AN XY:

74514

show subpopulations

Gnomad4 AFR

AF:

0.000264

Gnomad4 AMR

AF:

0.00157

Gnomad4 ASJ

AF:

0.00259

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.000207

Gnomad4 FIN

AF:

0.000659

Gnomad4 NFE

AF:

0.00172

Gnomad4 OTH

AF:

0.00237

Alfa

AF:

0.00162

Hom.:

Bravo

AF:

0.00120

TwinsUK

AF:

0.00189

AC:

ALSPAC

AF:

0.00130

AC:

ESP6500AA

AF:

0.000248

AC:

ESP6500EA

AF:

0.00204

AC:

ExAC

AF:

0.000871

AC:

105

Asia WGS

AF:

0.000289

AC:

AN:

3478

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:3Benign:5

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

Dyskeratosis congenita

Uncertain:1Benign:2

Likely benign, criteria provided, single submitter	curation	Sema4, Sema4	Nov 09, 2020	- -
Benign, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Jan 28, 2024	- -
Uncertain significance, criteria provided, single submitter	clinical testing	Illumina Laboratory Services, Illumina	Apr 27, 2017	This variant was observed as part of a predisposition screen in an ostensibly healthy population. A literature search was performed for the gene, cDNA change, and amino acid change (where applicable). No publications were found based on this search. Allele frequency data from public databases did not allow this variant to be ruled in or out of causing disease. Therefore, this variant is classified as a variant of unknown significance. -

Cerebroretinal microangiopathy with calcifications and cysts 1

Uncertain:1Benign:1

Likely benign, criteria provided, single submitter	clinical testing	Genome-Nilou Lab	Jul 15, 2021	- -
Uncertain significance, criteria provided, single submitter	clinical testing	Revvity Omics, Revvity	Jul 24, 2019	- -

CTC1-related disorder

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

PreventionGenetics, part of Exact Sciences

Apr 20, 2023

The CTC1 c.1720C>T variant is predicted to result in the amino acid substitution p.Pro574Ser. This variant was reported in an individual with retinal / optic nerve disease (Diñeiro et al 2020. PubMed ID: 32483926, Table S12). This variant is reported in 0.35% of alleles in individuals of Ashkenazi Jewish descent in gnomAD (http://gnomad.broadinstitute.org/variant/17-8137871-G-A). Although we suspect that this variant may be benign, at this time, the clinical significance of this variant is uncertain due to the absence of conclusive functional and genetic evidence. -

not specified

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Genetic Services Laboratory, University of Chicago

Apr 14, 2021

- -

not provided

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

GeneDx

Mar 11, 2019

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.16

BayesDel_addAF

Benign

-0.33

BayesDel_noAF

Benign

-0.25

CADD

Benign

DANN

Benign

0.97

DEOGEN2

Uncertain

0.47

Eigen

Uncertain

0.51

Eigen_PC

Uncertain

0.50

FATHMM_MKL

Uncertain

0.89

LIST_S2

Benign

0.71

M_CAP

Benign

0.056

MetaRNN

Benign

0.010

MetaSVM

Uncertain

0.079

MutationAssessor

Uncertain

2.3

MutationTaster

Benign

0.99

PrimateAI

Benign

0.42

PROVEAN

Benign

-2.3

REVEL

Uncertain

0.30

Sift

Benign

0.25

Sift4G

Benign

0.15

Polyphen

1.0

Vest4

0.13

MVP

0.78

MPC

0.57

ClinPred

0.035

GERP RS

5.4

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.084

gMVP

0.54

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.020

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