chr5-1293744-C-G

Position:

chr5-1293744-C-G

Variant summary

Our verdict is Uncertain significance. Variant got 4 ACMG points: 4P and 0B. PM2PP3_Moderate

The NM_198253.3(TERT):c.1142G>C(p.Arg381Pro) 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 1,564,628 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

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

Exomes 𝑓: 0.000025 ( 0 hom. )

Consequence

TERT
NM_198253.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 0.698

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 4 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP3

MetaRNN computational evidence supports a deleterious effect, 0.887

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein
TERT	NM_198253.3 linkuse as main transcript	c.1142G>C	p.Arg381Pro	missense_variant	2/16	ENST00000310581.10	NP_937983.2
TERT	NM_001193376.3 linkuse as main transcript	c.1142G>C	p.Arg381Pro	missense_variant	2/15		NP_001180305.1
TERT	NR_149162.3 linkuse as main transcript	n.1221G>C		non_coding_transcript_exon_variant	2/13
TERT	NR_149163.3 linkuse as main transcript	n.1221G>C		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.1142G>C	p.Arg381Pro	missense_variant	2/16	1	NM_198253.3	ENSP00000309572	P2	O14746-1
TERT	ENST00000334602.10 linkuse as main transcript	c.1142G>C	p.Arg381Pro	missense_variant	2/15	1		ENSP00000334346	A2	O14746-3
TERT	ENST00000460137.6 linkuse as main transcript	c.1142G>C	p.Arg381Pro	missense_variant, NMD_transcript_variant	2/13	1		ENSP00000425003		O14746-4
TERT	ENST00000656021.1 linkuse as main transcript	c.1142G>C	p.Arg381Pro	missense_variant, NMD_transcript_variant	2/17			ENSP00000499759

Frequencies

GnomAD3 genomes

AF:

0.0000526

AC:

AN:

152210

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:

0.000283

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000735

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000350

AC:

AN:

171216

Hom.:

AF XY:

0.0000329

AC XY:

AN XY:

91320

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:

0.0000630

Gnomad NFE exome

AF:

0.0000718

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000248

AC:

AN:

1412418

Hom.:

Cov.:

AF XY:

0.0000258

AC XY:

AN XY:

697832

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:

0.00

Gnomad4 FIN exome

AF:

0.000288

Gnomad4 NFE exome

AF:

0.0000175

Gnomad4 OTH exome

AF:

0.0000342

GnomAD4 genome

AF:

0.0000526

AC:

AN:

152210

Hom.:

Cov.:

AF XY:

0.0000807

AC XY:

AN XY:

74356

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:

0.000283

Gnomad4 NFE

AF:

0.0000735

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000282

Hom.:

Bravo

AF:

0.0000151

ExAC

AF:

0.0000261

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

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

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Oct 30, 2023

This sequence change replaces arginine, which is basic and polar, with proline, which is neutral and non-polar, at codon 381 of the TERT protein (p.Arg381Pro). This variant is present in population databases (rs777343359, gnomAD 0.005%). This missense change has been observed in individual(s) with dyskeratosis congenita (PMID: 21931702). ClinVar contains an entry for this variant (Variation ID: 410679). 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 TERT protein function with a positive predictive value of 95%. Experimental studies have shown that this missense change affects TERT function (PMID: 21931702). In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.18

BayesDel_addAF

Pathogenic

0.22

BayesDel_noAF

Pathogenic

0.26

CADD

Benign

DANN

Uncertain

1.0

DEOGEN2

Uncertain

0.76

D;.

Eigen

Uncertain

0.22

Eigen_PC

Benign

0.061

FATHMM_MKL

Benign

0.33

LIST_S2

Benign

0.79

T;T

M_CAP

Pathogenic

0.98

MetaRNN

Pathogenic

0.89

D;D

MetaSVM

Pathogenic

1.1

MutationAssessor

Uncertain

2.8

M;M

MutationTaster

Benign

0.94

D;D;D;D

PrimateAI

Uncertain

0.70

PROVEAN

Uncertain

-3.4

D;D

REVEL

Pathogenic

0.73

Sift

Uncertain

0.0050

D;D

Sift4G

Uncertain

0.0040

D;D

Polyphen

1.0

D;D

Vest4

0.67

MutPred

0.49

Loss of MoRF binding (P = 2e-04);Loss of MoRF binding (P = 2e-04);

MVP

0.98

MPC

2.6

ClinPred

0.85

GERP RS

4.1

Varity_R

0.67

gMVP

0.88

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