rs1171775942

Variant names:

Variant summary

Our verdict is Uncertain significance. The variant received 2 ACMG points: 2P and 0B. PM2

The ENST00000602385.3(TERC):n.245delC variant causes a non coding transcript exon change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000689 in 725,876 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★★).

Frequency

Genomes: 𝑓 0.0000066 ( 0 hom., cov: 32)

Exomes 𝑓: 0.0000070 ( 0 hom. )

Consequence

TERC
ENST00000602385.3 non_coding_transcript_exon

Scores

Not classified

Clinical Significance

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

Conservation

PhyloP100: 1.69

Publications

1 publications found

Variant links:

Genes affected

TERC (HGNC:11727): (telomerase RNA component) 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, and an RNA component, encoded by this gene, that 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. Mutations in this gene cause autosomal dominant dyskeratosis congenita, and may also be associated with some cases of aplastic anemia. [provided by RefSeq, Jul 2008]

TERC Gene-Disease associations (from GenCC):

dyskeratosis congenita, autosomal dominant 1
Inheritance: AD Classification: DEFINITIVE, STRONG, MODERATE Submitted by: G2P, Ambry Genetics, Labcorp Genetics (formerly Invitae), Genomics England PanelApp
acute myeloid leukemia
Inheritance: AD Classification: STRONG Submitted by: Genomics England PanelApp

TERC links:

ENSG00000296372 (HGNC:):

ENSG00000296372 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
TERC	NR_001566.3 link	n.245delC		non_coding_transcript_exon_variant	Exon 1 of 1	ENST00000602385.3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
TERC	ENST00000602385.3 link	n.245delC		non_coding_transcript_exon_variant	Exon 1 of 1	6	NR_001566.3
ENSG00000296372	ENST00000738610.1 link	n.434delG		non_coding_transcript_exon_variant	Exon 1 of 1

Frequencies

GnomAD3 genomes

AF:

0.00000657

AC:

AN:

152160

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:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000147

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.00000611

AC:

AN:

163654

AF XY:

0.00

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 FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.000216

GnomAD4 exome

AF:

0.00000697

AC:

AN:

573716

Hom.:

Cov.:

AF XY:

0.00000321

AC XY:

AN XY:

311950

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

16828

American (AMR)

AF:

0.00

AC:

AN:

37532

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

20278

East Asian (EAS)

AF:

0.00

AC:

AN:

33924

South Asian (SAS)

AF:

0.00

AC:

AN:

66050

European-Finnish (FIN)

AF:

0.00

AC:

AN:

34738

Middle Eastern (MID)

AF:

0.00

AC:

AN:

3840

European-Non Finnish (NFE)

AF:

0.0000122

AC:

AN:

329198

Other (OTH)

AF:

0.00

AC:

AN:

31328

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.513

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

AF:

0.00000657

AC:

AN:

152160

Hom.:

Cov.:

AF XY:

0.0000135

AC XY:

AN XY:

74344

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

41458

American (AMR)

AF:

0.00

AC:

AN:

15276

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3466

East Asian (EAS)

AF:

0.00

AC:

AN:

5174

South Asian (SAS)

AF:

0.00

AC:

AN:

4836

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10622

Middle Eastern (MID)

AF:

0.00

AC:

AN:

316

European-Non Finnish (NFE)

AF:

0.0000147

AC:

AN:

68006

Other (OTH)

AF:

0.00

AC:

AN:

2094

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.475

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Uncertain:1

Jun 03, 2024

GeneDx

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Has not been previously published as pathogenic or benign to our knowledge; May impact multiple regions of a TERC RNA including P5 stem of the CR4/CR5 domain and the loop region of the TERC RNA; Located at a position that is not conserved across multiple species; In the absence of RNA/functional studies, the actual effect of this sequence change is unknown

Dyskeratosis congenita, autosomal dominant 1

Uncertain:1

Dec 15, 2022

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. This variant is located within the conserved regions 4 and 5 (CR4-CR5) domain of the TERC RNA component, which is required for telomerase activity (PMID: 15082312, 21844345). ClinVar contains an entry for this variant (Variation ID: 534180). This variant has not been reported in the literature in individuals affected with TERC-related conditions. This variant is present in population databases (no rsID available, gnomAD 0.001%). This variant occurs in the TERC gene, which encodes an RNA molecule that does not result in a protein product.

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

PhyloP100

1.7

Splicing

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

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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