rs199422260

Variant names:

Your query was ambiguous. Multiple possible variants found:

Variant summary

Our verdict is Likely benign. The variant received -5 ACMG points: 0P and 5B. BP4_StrongBS2_Supporting

The ENST00000602385.3(TERC):n.35C>T 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 0.0000144 in 765,134 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★).

Frequency

Genomes: 𝑓 0.000013 ( 0 hom., cov: 33)

Exomes 𝑓: 0.000015 ( 0 hom. )

Consequence

TERC
ENST00000602385.3 non_coding_transcript_exon

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts P:1U:3

Conservation

PhyloP100: -2.13

Publications

5 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: Likely_benign. The variant received -5 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.56).

BS2

High AC in GnomAdExome4 at 9 AD gene. Variant has AC lower than other variant known as pathogenic in the gene, so the strength is limited to Supporting.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
TERC	NR_001566.3 link	n.35C>T		non_coding_transcript_exon_variant	Exon 1 of 1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
TERC	ENST00000602385.3 link	n.35C>T		non_coding_transcript_exon_variant	Exon 1 of 1	6
ENSG00000296372	ENST00000738610.1 link	n.641G>A		non_coding_transcript_exon_variant	Exon 1 of 1

Frequencies

GnomAD3 genomes

AF:

0.0000131

AC:

AN:

152230

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:

0.0000294

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.0000217

AC:

AN:

230684

AF XY:

0.0000314

show subpopulations

Gnomad AFR exome

AF:

0.0000727

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:

0.0000279

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000147

AC:

AN:

612904

Hom.:

Cov.:

AF XY:

0.0000179

AC XY:

AN XY:

334988

show subpopulations

African (AFR)

AF:

0.0000566

AC:

AN:

17676

American (AMR)

AF:

0.00

AC:

AN:

43732

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

20974

East Asian (EAS)

AF:

0.00

AC:

AN:

36062

South Asian (SAS)

AF:

0.0000143

AC:

AN:

69798

European-Finnish (FIN)

AF:

0.0000265

AC:

AN:

37750

Middle Eastern (MID)

AF:

0.00

AC:

AN:

4118

European-Non Finnish (NFE)

AF:

0.0000172

AC:

AN:

349828

Other (OTH)

AF:

0.00

AC:

AN:

32966

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.519

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome 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

GnomAD4 genome

AF:

0.0000131

AC:

AN:

152230

Hom.:

Cov.:

AF XY:

0.0000269

AC XY:

AN XY:

74374

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

41470

American (AMR)

AF:

0.00

AC:

AN:

15294

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3470

East Asian (EAS)

AF:

0.00

AC:

AN:

5188

South Asian (SAS)

AF:

0.00

AC:

AN:

4838

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10618

Middle Eastern (MID)

AF:

0.00

AC:

AN:

316

European-Non Finnish (NFE)

AF:

0.0000294

AC:

AN:

68038

Other (OTH)

AF:

0.00

AC:

AN:

2086

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

Alfa

AF:

0.0000431

Hom.:

Bravo

AF:

0.00000756

ClinVar

Significance: Uncertain significance

Submissions summary: Pathogenic:1Uncertain:3

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Dyskeratosis congenita, autosomal dominant 1

Pathogenic:1Uncertain:1

Sep 04, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This variant occurs in the TERC gene, which encodes an RNA molecule that does not result in a protein product. This variant is present in population databases (rs199422260, gnomAD 0.004%). This variant has been observed in individual(s) with hypoplastic myelodysplastic syndrome and dyskeratosis congenita (PMID: 18931339, 27622320). ClinVar contains an entry for this variant (Variation ID: 39292). Algorithms developed to predict the effect of variants on gene product structure and function are not available or were not evaluated for this variant. Experimental studies have shown that this variant affects TERC function (PMID: 18931339). This variant is located within the template/pseudoknot domain of the TERC RNA component, which is required for RNA or RNP stability (PMID: 15082312, 21844345). This variant is located in a region of TERC in which a significant number of disease causing variants have been reported (PMID: 15082312, 21844345, 21931702). These observations suggest that this may be a clinically significant region. 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. -

May 10, 2012

GeneReviews

Significance:Pathogenic

Review Status:no assertion criteria provided

Collection Method:curation

- -

not specified

Uncertain:1

May 20, 2024

Women's Health and Genetics/Laboratory Corporation of America, LabCorp

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Variant summary: TERC n.35C>T alters a nucleotide in the non-coding RNA. The variant allele was found at a frequency of 2.2e-05 in 230684 control chromosomes. The available data on variant occurrences in the general population are insufficient to allow any conclusion about variant significance. n.35C>T has been reported in the literature in individuals affected with hypoplastic myelodysplastic syndrome and dyskeratosis congenita. These reports do not provide unequivocal conclusions about association of the variant with TERC-Related Disorders. One in vitro reconstitution assays using WI-38 VA-13 cells revealed that this variant resulted in a 76% reduction in telomerase activity. ClinVar contains an entry for this variant (Variation ID: 39292). Based on the evidence outlined above, the variant was classified as uncertain significance. -

Pulmonary fibrosis and/or bone marrow failure, Telomere-related, 2;C4551974:Dyskeratosis congenita, autosomal dominant 1

Uncertain:1

Dec 15, 2021

Fulgent Genetics, Fulgent Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.56

CADD

Benign

2.7

(source)

DANN

Benign

0.86

PhyloP100

-2.1

RBP_binding_hub_radar

1.0

RBP_regulation_power_radar

3.6

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