chr5-1294332-C-A

Variant names:

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 4P and 3B. PM1PM2BP4_ModerateBP6

The NM_198253.3(TERT):c.554G>T(p.Arg185Leu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000021 in 1,429,120 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 14/21 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: not found (cov: 34)

Exomes 𝑓: 0.0000021 ( 0 hom. )

Consequence

TERT
NM_198253.3 missense

Scores

Clinical Significance

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

Conservation

PhyloP100: -1.12

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 1 ACMG points.

PM1

In a region_of_interest RNA-interacting domain 1 (size 229) in uniprot entity TERT_HUMAN there are 10 pathogenic changes around while only 3 benign (77%) in NM_198253.3

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.14181429).

BP6

Variant 5-1294332-C-A is Benign according to our data. Variant chr5-1294332-C-A is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 577181.We mark this variant Likely_benign, oryginal submissions are: {Likely_benign=1, Uncertain_significance=1}.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
TERT	NM_198253.3 link	c.554G>T	p.Arg185Leu	missense_variant	Exon 2 of 16	ENST00000310581.10	NP_937983.2	O14746-1
TERT	NM_001193376.3 link	c.554G>T	p.Arg185Leu	missense_variant	Exon 2 of 15		NP_001180305.1	O14746-3
TERT	NR_149162.3 link	n.633G>T		non_coding_transcript_exon_variant	Exon 2 of 13
TERT	NR_149163.3 link	n.633G>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.554G>T	p.Arg185Leu	missense_variant	Exon 2 of 16	1	NM_198253.3	ENSP00000309572.5	O14746-1
TERT	ENST00000334602.10 link	c.554G>T	p.Arg185Leu	missense_variant	Exon 2 of 15	1		ENSP00000334346.6	O14746-3
TERT	ENST00000460137.6 link	n.554G>T		non_coding_transcript_exon_variant	Exon 2 of 13	1		ENSP00000425003.1	O14746-4
TERT	ENST00000656021.1 link	n.554G>T		non_coding_transcript_exon_variant	Exon 2 of 17			ENSP00000499759.1	A0A590UK92

Frequencies

GnomAD3 genomes

Cov.:

GnomAD3 exomes

AF:

0.00000539

AC:

AN:

185420

Hom.:

AF XY:

0.00000963

AC XY:

AN XY:

103804

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.0000670

Gnomad SAS 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:

0.00000210

AC:

AN:

1429120

Hom.:

Cov.:

AF XY:

0.00000282

AC XY:

AN XY:

710052

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:

0.00

Gnomad4 NFE exome

AF:

0.00

Gnomad4 OTH exome

AF:

0.0000505

GnomAD4 genome

Cov.:

Alfa

AF:

0.0000712

Hom.:

Bravo

AF:

0.0000113

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

Feb 22, 2022

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The p.R185L variant (also known as c.554G>T), located in coding exon 2 of the TERT gene, results from a G to T substitution at nucleotide position 554. The arginine at codon 185 is replaced by leucine, 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. -

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

Benign:1

Dec 26, 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

0.084

BayesDel_addAF

Benign

-0.020

BayesDel_noAF

Benign

-0.27

CADD

Benign

2.1

DANN

Benign

0.85

DEOGEN2

Benign

0.39

T;.

Eigen

Benign

-1.2

Eigen_PC

Benign

-1.3

FATHMM_MKL

Benign

0.030

LIST_S2

Benign

0.65

T;T

M_CAP

Pathogenic

0.64

MetaRNN

Benign

0.14

T;T

MetaSVM

Uncertain

-0.079

MutationAssessor

Benign

0.60

N;N

PrimateAI

Uncertain

0.54

PROVEAN

Benign

-1.5

N;N

REVEL

Benign

0.22

Sift

Benign

0.41

T;T

Sift4G

Benign

0.45

T;T

Polyphen

0.0010

B;B

Vest4

0.12

MutPred

0.27

Loss of helix (P = 0.028);Loss of helix (P = 0.028);

MVP

0.31

MPC

1.4

ClinPred

0.023

GERP RS

-2.5

Varity_R

0.050

gMVP

0.78

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.010

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