5-1279467-C-T

Variant names:

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2BP4_Moderate

The NM_198253.3(TERT):c.1954G>A(p.Glu652Lys) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000071 in 1,548,936 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 15/21 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 0.000013 ( 0 hom., cov: 33)

Exomes 𝑓: 0.0000064 ( 0 hom. )

Consequence

TERT
NM_198253.3 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:4B:1

Conservation

PhyloP100: 0.295

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=0.09088224).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
TERT	NM_198253.3 link	c.1954G>A	p.Glu652Lys	missense_variant	Exon 5 of 16	ENST00000310581.10	NP_937983.2	O14746-1
TERT	NM_001193376.3 link	c.1954G>A	p.Glu652Lys	missense_variant	Exon 5 of 15		NP_001180305.1	O14746-3
TERT	NR_149162.3 link	n.2033G>A		non_coding_transcript_exon_variant	Exon 5 of 13
TERT	NR_149163.3 link	n.2033G>A		non_coding_transcript_exon_variant	Exon 5 of 13

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
TERT	ENST00000310581.10 link	c.1954G>A	p.Glu652Lys	missense_variant	Exon 5 of 16	1	NM_198253.3	ENSP00000309572.5		O14746-1

Frequencies

GnomAD3 genomes

AF:

0.0000131

AC:

AN:

152136

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000241

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:

0.0000147

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000202

AC:

AN:

148810

Hom.:

AF XY:

0.0000125

AC XY:

AN XY:

80056

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.0000406

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000182

Gnomad OTH exome

AF:

0.000233

GnomAD4 exome

AF:

0.00000644

AC:

AN:

1396800

Hom.:

Cov.:

AF XY:

0.00000871

AC XY:

AN XY:

689010

show subpopulations

Gnomad4 AFR exome

AF:

0.0000317

Gnomad4 AMR exome

AF:

0.0000279

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000253

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000371

Gnomad4 OTH exome

AF:

0.0000173

GnomAD4 genome

AF:

0.0000131

AC:

AN:

152136

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

74310

show subpopulations

Gnomad4 AFR

AF:

0.0000241

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:

0.0000147

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000388

Hom.:

Bravo

AF:

0.0000189

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:4Benign:1

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

Aplastic anemia;C0023467:Acute myeloid leukemia;C3151443:Dyskeratosis congenita, autosomal dominant 2;C3553617:Pulmonary fibrosis and/or bone marrow failure, Telomere-related, 1;C3554574:Melanoma, cutaneous malignant, susceptibility to, 9;C4551974:Dyskeratosis congenita, autosomal dominant 1;C5561926:Interstitial lung disease 2

Uncertain:1

Jan 20, 2022

Fulgent Genetics, Fulgent Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Dyskeratosis congenita, autosomal dominant 2

Uncertain:1

Jul 10, 2023

Baylor Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

not provided

Uncertain:1

Sep 20, 2022

GeneDx

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

In silico analysis supports that this missense variant does not alter protein structure/function; Has not been previously published as pathogenic or benign to our knowledge -

Dyskeratosis congenita

Uncertain:1

Apr 04, 2022

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The p.E652K variant (also known as c.1954G>A), located in coding exon 5 of the TERT gene, results from a G to A substitution at nucleotide position 1954. The glutamic acid at codon 652 is replaced by lysine, an amino acid with 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

Dec 19, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.11

BayesDel_addAF

Benign

0.0095

BayesDel_noAF

Benign

-0.22

CADD

Benign

DANN

Benign

0.97

DEOGEN2

Benign

0.33

T;.

Eigen

Benign

-1.1

Eigen_PC

Benign

-1.1

FATHMM_MKL

Benign

0.022

LIST_S2

Benign

0.60

T;T

M_CAP

Uncertain

0.27

MetaRNN

Benign

0.091

T;T

MetaSVM

Uncertain

-0.26

MutationAssessor

Benign

-0.34

N;N

PrimateAI

Benign

0.33

PROVEAN

Benign

0.33

N;N

REVEL

Benign

0.20

Sift

Benign

0.30

T;T

Sift4G

Benign

0.56

T;T

Polyphen

0.11

B;B

Vest4

0.26

MutPred

0.31

Gain of methylation at K649 (P = 0.1567);Gain of methylation at K649 (P = 0.1567);

MVP

0.52

MPC

1.2

ClinPred

0.048

GERP RS

2.4

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.1

Varity_R

0.021

gMVP

0.78

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