chr5-1253629-G-A

Position:

• chr5-1253629-G-A

Variant summary

Our verdict is Benign. Variant got -20 ACMG points: 0P and 20B. BP4_Strong BP6_Very_Strong BA1

The NM_198253.3(TERT):​c.*99C>T variant causes a 3 prime UTR change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.167 in 998,776 control chromosomes in the GnomAD database, including 16,193 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★★).

• Frequency:
  • Genomes: 𝑓 0.19 (3360 hom., cov: 33)
  • Exomes 𝑓: 0.16 (12833 hom.)
• Consequence: TERT NM_198253.3 3_prime_UTR
• Clinical Significance: Benign criteria provided, multiple submitters, no conflicts B:5
• Conservation: PhyloP100: -1.49

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]

(HGNC:):

ACMG classification

Verdict is Benign. Variant got -20 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.98).
• BP6: Variant 5-1253629-G-A is Benign according to our data. Variant chr5-1253629-G-A is described in ClinVar as [Benign]. Clinvar id is 350515.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.
• BA1: GnomAd4 highest subpopulation (AFR) allele frequency at 95% confidence interval = 0.298 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
TERT	NM_198253.3	c.*99C>T		3_prime_UTR_variant	16/16	ENST00000310581.10
TERT	NM_001193376.3	c.*99C>T		3_prime_UTR_variant	15/15
TERT	NR_149162.3	n.3206C>T		non_coding_transcript_exon_variant	13/13
TERT	NR_149163.3	n.3170C>T		non_coding_transcript_exon_variant	13/13

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
TERT	ENST00000310581.10	c.*99C>T		3_prime_UTR_variant	16/16	1	NM_198253.3	P2
	ENST00000666708.1	n.289-1045G>A		intron_variant, non_coding_transcript_variant
TERT	ENST00000484238.6	n.1940C>T		non_coding_transcript_exon_variant	11/11	5
TERT	ENST00000656021.1	c.*3044C>T		3_prime_UTR_variant, NMD_transcript_variant	17/17

Frequencies

GnomAD3 genomes AF: 0.193 AC: 29371 AN: 152112 Hom.: 3357 Cov.: 33

Gnomad AFR AF: 0.303

Gnomad AMI AF: 0.158

Gnomad AMR AF: 0.141

Gnomad ASJ AF: 0.127

Gnomad EAS AF: 0.00384

Gnomad SAS AF: 0.0849

Gnomad FIN AF: 0.0902

Gnomad MID AF: 0.114

Gnomad NFE AF: 0.181

Gnomad OTH AF: 0.180

GnomAD4 exome AF: 0.162 AC: 137406 AN: 846546 Hom.: 12833 Cov.: 11 AF XY: 0.158 AC XY: 69096 AN XY: 437754

Gnomad4 AFR exome AF: 0.314

Gnomad4 AMR exome AF: 0.0989

Gnomad4 ASJ exome AF: 0.128

Gnomad4 EAS exome AF: 0.00160

Gnomad4 SAS exome AF: 0.0870

Gnomad4 FIN exome AF: 0.0977

Gnomad4 NFE exome AF: 0.184

Gnomad4 OTH exome AF: 0.165

GnomAD4 genome AF: 0.193 AC: 29409 AN: 152230 Hom.: 3360 Cov.: 33 AF XY: 0.186 AC XY: 13858 AN XY: 74432

Gnomad4 AFR AF: 0.303

Gnomad4 AMR AF: 0.140

Gnomad4 ASJ AF: 0.127

Gnomad4 EAS AF: 0.00366

Gnomad4 SAS AF: 0.0857

Gnomad4 FIN AF: 0.0902

Gnomad4 NFE AF: 0.181

Gnomad4 OTH AF: 0.178

Alfa AF: 0.175 Hom.: 2468

Bravo AF: 0.202

Asia WGS AF: 0.0560 AC: 197 AN: 3478

ClinVar

Significance: Benign

Submissions summary: Benign:5

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

not specified Benign:1

Benign, criteria provided, single submitter

clinical testing

Unidad de Genómica Garrahan, Hospital de Pediatría Garrahan

Jan 24, 2024

This variant is classified as Benign based on local population frequency. This variant was detected in 22% of patients studied by a panel of primary immunodeficiencies. Number of patients: 21. Only high quality variants are reported. -

Aplastic anemia Benign:1

Benign, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Apr 27, 2017

This variant was observed as part of a predisposition screen in an ostensibly healthy population. A literature search was performed for the gene, cDNA change, and amino acid change (where applicable). No publications were found based on this search. Allele frequency data from public databases was too high to be consistent with this variant causing disease. Therefore, this variant is classified as benign. -

Dyskeratosis congenita, autosomal dominant 2 Benign:1

Benign, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Apr 27, 2017

This variant was observed as part of a predisposition screen in an ostensibly healthy population. A literature search was performed for the gene, cDNA change, and amino acid change (where applicable). No publications were found based on this search. Allele frequency data from public databases was too high to be consistent with this variant causing disease. Therefore, this variant is classified as benign. -

Pulmonary fibrosis and/or bone marrow failure, Telomere-related, 1 Benign:1

Benign, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Apr 27, 2017

This variant was observed as part of a predisposition screen in an ostensibly healthy population. A literature search was performed for the gene, cDNA change, and amino acid change (where applicable). No publications were found based on this search. Allele frequency data from public databases was too high to be consistent with this variant causing disease. Therefore, this variant is classified as benign. -

not provided Benign:1

Benign, criteria provided, single submitter

clinical testing

GeneDx

Nov 08, 2018

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.98
CADD	Benign	0.18
DANN	Benign	0.54

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

Other links and lift over

dbSNP: rs2853690; hg19: chr5-1253744;