rs771590775

Variant names:

Your query was ambiguous. Multiple possible variants found:

Variant summary

Our verdict is Likely benign. The variant received -2 ACMG points: 2P and 4B. PM2BP4_Strong

The NM_198253.3(TERT):c.536G>T(p.Gly179Val) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000019 in 1,577,596 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 15/22 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. G179A) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.000013 ( 0 hom., cov: 34)

Exomes 𝑓: 7.0e-7 ( 0 hom. )

Consequence

TERT
NM_198253.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:2

Conservation

PhyloP100: -0.565

Publications

1 publications found

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 Gene-Disease associations (from GenCC):

pulmonary fibrosis and/or bone marrow failure, Telomere-related, 1
Inheritance: AD Classification: DEFINITIVE, STRONG Submitted by: Labcorp Genetics (formerly Invitae), Ambry Genetics
dyskeratosis congenita, autosomal dominant 2
Inheritance: AR, AD, SD, Unknown Classification: DEFINITIVE, STRONG, MODERATE Submitted by: Ambry Genetics, G2P, Genomics England PanelApp, Labcorp Genetics (formerly Invitae), ClinGen, Laboratory for Molecular Medicine
acute myeloid leukemia
Inheritance: AD Classification: STRONG, LIMITED Submitted by: Labcorp Genetics (formerly Invitae), Genomics England PanelApp
dyskeratosis congenita
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
Hoyeraal-Hreidarsson syndrome
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
melanoma, cutaneous malignant, susceptibility to, 9
Inheritance: AD Classification: LIMITED Submitted by: Labcorp Genetics (formerly Invitae), Ambry Genetics

TERT links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.06687486).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
TERT	NM_198253.3 link	c.536G>T	p.Gly179Val	missense_variant	Exon 2 of 16	ENST00000310581.10	NP_937983.2	O14746-1
TERT	NM_001193376.3 link	c.536G>T	p.Gly179Val	missense_variant	Exon 2 of 15		NP_001180305.1	O14746-3
TERT	NR_149162.3 link	n.615G>T		non_coding_transcript_exon_variant	Exon 2 of 13
TERT	NR_149163.3 link	n.615G>T		non_coding_transcript_exon_variant	Exon 2 of 13

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
TERT	ENST00000310581.10 link	c.536G>T	p.Gly179Val	missense_variant	Exon 2 of 16	1	NM_198253.3	ENSP00000309572.5	O14746-1
TERT	ENST00000334602.10 link	c.536G>T	p.Gly179Val	missense_variant	Exon 2 of 15	1		ENSP00000334346.6	O14746-3
TERT	ENST00000460137.6 link	n.536G>T		non_coding_transcript_exon_variant	Exon 2 of 13	1		ENSP00000425003.1	O14746-4
TERT	ENST00000656021.1 link	n.536G>T		non_coding_transcript_exon_variant	Exon 2 of 17			ENSP00000499759.1	A0A590UK92

Frequencies

GnomAD3 genomes

AF:

0.0000131

AC:

AN:

152254

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000482

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

GnomAD2 exomes

AF:

0.00000551

AC:

AN:

181462

AF XY:

0.00

show subpopulations

Gnomad AFR exome

AF:

0.000101

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

7.02e-7

AC:

AN:

1425342

Hom.:

Cov.:

AF XY:

0.00000141

AC XY:

AN XY:

707944

show subpopulations

African (AFR)

AF:

0.0000303

AC:

AN:

32984

American (AMR)

AF:

0.00

AC:

AN:

41536

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

25666

East Asian (EAS)

AF:

0.00

AC:

AN:

38304

South Asian (SAS)

AF:

0.00

AC:

AN:

83424

European-Finnish (FIN)

AF:

0.00

AC:

AN:

37270

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5488

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

1101330

Other (OTH)

AF:

0.00

AC:

AN:

59340

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.525

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

AF:

0.0000131

AC:

AN:

152254

Hom.:

Cov.:

AF XY:

0.0000134

AC XY:

AN XY:

74380

show subpopulations

African (AFR)

AF:

0.0000482

AC:

AN:

41474

American (AMR)

AF:

0.00

AC:

AN:

15292

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3470

East Asian (EAS)

AF:

0.00

AC:

AN:

5194

South Asian (SAS)

AF:

0.00

AC:

AN:

4838

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10628

Middle Eastern (MID)

AF:

0.00

AC:

AN:

314

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

68038

Other (OTH)

AF:

0.00

AC:

AN:

2094

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.550

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Alfa

AF:

0.00

Hom.:

Bravo

AF:

0.00000378

ExAC

AF:

0.00000868

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

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

Uncertain:1

May 10, 2018

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

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. Algorithms developed to predict the effect of missense changes on protein structure and function (SIFT, PolyPhen-2, Align-GVGD) all suggest that this variant is likely to be tolerated, but these predictions have not been confirmed by published functional studies and their clinical significance is uncertain. This variant has not been reported in the literature in individuals with TERT-related disease. This variant is present in population databases (rs771590775, ExAC 0.04%). This sequence change replaces glycine with valine at codon 179 of the TERT protein (p.Gly179Val). The glycine residue is weakly conserved and there is a moderate physicochemical difference between glycine and valine. -

Dyskeratosis congenita

Uncertain:1

Mar 26, 2023

Ambry Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The p.G179V variant (also known as c.536G>T), located in coding exon 2 of the TERT gene, results from a G to T substitution at nucleotide position 536. The glycine at codon 179 is replaced by valine, an amino acid with dissimilar 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. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.12

BayesDel_addAF

Benign

-0.049

BayesDel_noAF

Benign

-0.31

CADD

Benign

5.8

(source)

DANN

Benign

0.65

DEOGEN2

Benign

0.32

T;.

Eigen

Benign

-1.2

Eigen_PC

Benign

-1.2

FATHMM_MKL

Benign

0.049

LIST_S2

Benign

0.69

T;T

M_CAP

Pathogenic

0.41

MetaRNN

Benign

0.067

T;T

MetaSVM

Uncertain

-0.063

MutationAssessor

Benign

-0.69

N;N

PhyloP100

-0.56

PrimateAI

Uncertain

0.68

PROVEAN

Benign

1.1

N;N

REVEL

Benign

0.21

Sift

Benign

0.52

T;T

Sift4G

Benign

0.51

T;T

Polyphen

0.072

B;B

Vest4

0.12

MutPred

0.50

Loss of loop (P = 0.0235);Loss of loop (P = 0.0235);

MVP

0.36

MPC

1.3

ClinPred

0.022

GERP RS

1.7

Varity_R

0.053

gMVP

0.82

Mutation Taster

=91/9

polymorphism

(source)

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

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rs771590775

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over