rs773366454

Positions:

chr5-1293861-C-T

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2BP4BP6

The ENST00000310581.10(TERT):c.1025G>A(p.Arg342Gln) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000647 in 1,546,002 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 12/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R342W) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.000053 ( 0 hom., cov: 34)

Exomes 𝑓: 0.0000014 ( 0 hom. )

Consequence

TERT
ENST00000310581.10 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:1B:1

Conservation

PhyloP100: 0.276

Variant links:

Genes affected

TERT (HGNC:11730): (telomerase reverse transcriptase) Telomerase is a ribonucleoprotein polymerase that maintains telomere ends by addition of the telomere repeat TTAGGG. The enzyme consists of a protein component with reverse transcriptase activity, encoded by this gene, and an RNA component which serves as a template for the telomere repeat. Telomerase expression plays a role in cellular senescence, as it is normally repressed in postnatal somatic cells resulting in progressive shortening of telomeres. Deregulation of telomerase expression in somatic cells may be involved in oncogenesis. Studies in mouse suggest that telomerase also participates in chromosomal repair, since de novo synthesis of telomere repeats may occur at double-stranded breaks. Alternatively spliced variants encoding different isoforms of telomerase reverse transcriptase have been identified; the full-length sequence of some variants has not been determined. Alternative splicing at this locus is thought to be one mechanism of regulation of telomerase activity. [provided by RefSeq, Jul 2008]

TERT links:

Genome browser will be placed here

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=0.29201895).

BP6

Variant 5-1293861-C-T is Benign according to our data. Variant chr5-1293861-C-T is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 567740.We mark this variant Likely_benign, oryginal submissions are: {Benign=1, Uncertain_significance=1}.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein
TERT	NM_198253.3 linkuse as main transcript	c.1025G>A	p.Arg342Gln	missense_variant	2/16	ENST00000310581.10	NP_937983.2
TERT	NM_001193376.3 linkuse as main transcript	c.1025G>A	p.Arg342Gln	missense_variant	2/15		NP_001180305.1
TERT	NR_149162.3 linkuse as main transcript	n.1104G>A		non_coding_transcript_exon_variant	2/13
TERT	NR_149163.3 linkuse as main transcript	n.1104G>A		non_coding_transcript_exon_variant	2/13

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
TERT	ENST00000310581.10 linkuse as main transcript	c.1025G>A	p.Arg342Gln	missense_variant	2/16	1	NM_198253.3	ENSP00000309572	P2	O14746-1
TERT	ENST00000334602.10 linkuse as main transcript	c.1025G>A	p.Arg342Gln	missense_variant	2/15	1		ENSP00000334346	A2	O14746-3
TERT	ENST00000460137.6 linkuse as main transcript	c.1025G>A	p.Arg342Gln	missense_variant, NMD_transcript_variant	2/13	1		ENSP00000425003		O14746-4
TERT	ENST00000656021.1 linkuse as main transcript	c.1025G>A	p.Arg342Gln	missense_variant, NMD_transcript_variant	2/17			ENSP00000499759

Frequencies

GnomAD3 genomes

AF:

0.0000526

AC:

AN:

152168

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000193

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:

0.00

Gnomad OTH

AF:

0.00

GnomAD4 exome

AF:

0.00000143

AC:

AN:

1393834

Hom.:

Cov.:

AF XY:

0.00000145

AC XY:

AN XY:

687796

show subpopulations

Gnomad4 AFR exome

AF:

0.0000633

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.0000526

AC:

AN:

152168

Hom.:

Cov.:

AF XY:

0.0000404

AC XY:

AN XY:

74328

show subpopulations

Gnomad4 AFR

AF:

0.000193

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:

0.00

Gnomad4 OTH

AF:

0.00

Bravo

AF:

0.0000302

ExAC

AF:

0.0000239

AC:

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:1Benign:1

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

Dyskeratosis congenita

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Feb 02, 2022

The p.R342Q variant (also known as c.1025G>A), located in coding exon 2 of the TERT gene, results from a G to A substitution at nucleotide position 1025. The arginine at codon 342 is replaced by glutamine, an amino acid with highly similar properties. This amino acid position is conserved. In addition, this alteration is predicted to be tolerated by in silico analysis. Since supporting evidence is limited at this time, the clinical significance of this alteration remains unclear. -

Idiopathic Pulmonary Fibrosis;C3151443:Dyskeratosis congenita, autosomal dominant 2

Benign:1

Benign, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Nov 10, 2023

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.10

BayesDel_addAF

Benign

-0.0053

BayesDel_noAF

Benign

-0.25

CADD

Benign

DANN

Uncertain

0.99

DEOGEN2

Benign

0.37

T;.

Eigen

Benign

-0.84

Eigen_PC

Benign

-1.0

FATHMM_MKL

Benign

0.062

LIST_S2

Uncertain

0.89

D;D

M_CAP

Pathogenic

0.91

MetaRNN

Benign

0.29

T;T

MetaSVM

Uncertain

0.070

MutationAssessor

Uncertain

2.5

M;M

MutationTaster

Benign

1.0

N;N;N;N

PrimateAI

Benign

0.39

PROVEAN

Benign

-0.35

N;N

REVEL

Uncertain

0.29

Sift

Benign

0.40

T;T

Sift4G

Benign

0.26

T;T

Polyphen

0.97

D;P

Vest4

0.052

MutPred

0.42

Loss of ubiquitination at K338 (P = 0.0605);Loss of ubiquitination at K338 (P = 0.0605);

MVP

0.79

MPC

1.9

ClinPred

0.27

GERP RS

0.029

Varity_R

0.028

gMVP

0.33

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