chr20-63695520-C-T

Variant names:

Variant summary

Our verdict is Benign. The variant received -20 ACMG points: 0P and 20B. BP4_StrongBP6_Very_StrongBS1BS2

The NM_001283009.2(RTEL1):c.3692C>T(p.Thr1231Met) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00101 in 1,612,090 control chromosomes in the GnomAD database, including 13 homozygotes. In-silico tool predicts a benign outcome for this variant. 13/16 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★★). Synonymous variant affecting the same amino acid position (i.e. T1231T) has been classified as Likely benign.

Frequency

Genomes: 𝑓 0.0053 ( 6 hom., cov: 33)

Exomes 𝑓: 0.00055 ( 7 hom. )

Consequence

RTEL1
NM_001283009.2 missense

Scores

Clinical Significance

Benign criteria provided, multiple submitters, no conflicts B:2

Conservation

PhyloP100: -7.25

Publications

2 publications found

Variant links:

Genes affected

RTEL1 (HGNC:15888): (regulator of telomere elongation helicase 1) This gene encodes a DNA helicase which functions in the stability, protection and elongation of telomeres and interacts with proteins in the shelterin complex known to protect telomeres during DNA replication. Mutations in this gene have been associated with dyskeratosis congenita and Hoyerall-Hreidarsson syndrome. Read-through transcription of this gene into the neighboring downstream gene, which encodes tumor necrosis factor receptor superfamily, member 6b, generates a non-coding transcript. Alternative splicing results in multiple transcript variants encoding different isoforms. [provided by RefSeq, Sep 2013]

RTEL1 links:

RTEL1-TNFRSF6B (HGNC:44095): (RTEL1-TNFRSF6B readthrough (NMD candidate)) This locus represents naturally occurring read-through transcription between the neighboring RTEL1 (regulator of telomere elongation helicase 1) and TNFRSF6B (tumor necrosis factor receptor superfamily, member 6b, decoy) genes on chromosome 20. The read-through transcript is a candidate for nonsense-mediated mRNA decay (NMD), and is unlikely to produce a protein product. [provided by RefSeq, Feb 2011]

RTEL1-TNFRSF6B links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -20 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.0030531585).

BP6

Variant 20-63695520-C-T is Benign according to our data. Variant chr20-63695520-C-T is described in ClinVar as Benign. ClinVar VariationId is 540956.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BS1

Variant frequency is greater than expected in population afr. GnomAd4 allele frequency = 0.00534 (813/152308) while in subpopulation AFR AF = 0.0184 (765/41560). AF 95% confidence interval is 0.0173. There are 6 homozygotes in GnomAd4. There are 391 alleles in the male GnomAd4 subpopulation. Median coverage is 33. This position passed quality control check.

BS2

High Homozygotes in GnomAd4 at 6 AR,AD gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
RTEL1	NM_001283009.2 link	c.3692C>T	p.Thr1231Met	missense_variant	Exon 34 of 35	ENST00000360203.11	NP_001269938.1	Q9NZ71-6R4IXY3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
RTEL1	ENST00000360203.11 link	c.3692C>T	p.Thr1231Met	missense_variant	Exon 34 of 35	5	NM_001283009.2	ENSP00000353332.5	Q9NZ71-6
RTEL1	ENST00000508582.7 link	c.3724+40C>T		intron_variant	Intron 34 of 34	2		ENSP00000424307.2	Q9NZ71-7
RTEL1	ENST00000370018.7 link	c.3652+40C>T		intron_variant	Intron 34 of 34	1		ENSP00000359035.3	Q9NZ71-1
RTEL1-TNFRSF6B	ENST00000492259.6 link	n.*1254+40C>T		intron_variant	Intron 31 of 34	5		ENSP00000457428.1	D6RA96

Frequencies

GnomAD3 genomes

AF:

0.00532

AC:

809

AN:

152190

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0184

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00235

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000414

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000294

Gnomad OTH

AF:

0.00382

GnomAD2 exomes

AF:

0.00129

AC:

317

AN:

245850

AF XY:

0.000916

show subpopulations

Gnomad AFR exome

AF:

0.0182

Gnomad AMR exome

AF:

0.000725

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000455

Gnomad OTH exome

AF:

0.000166

GnomAD4 exome

AF:

0.000554

AC:

808

AN:

1459782

Hom.:

Cov.:

AF XY:

0.000485

AC XY:

352

AN XY:

726186

show subpopulations

African (AFR)

AF:

0.0184

AC:

615

AN:

33478

American (AMR)

AF:

0.000873

AC:

AN:

44656

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26070

East Asian (EAS)

AF:

0.00

AC:

AN:

39694

South Asian (SAS)

AF:

0.000244

AC:

AN:

86180

European-Finnish (FIN)

AF:

0.00

AC:

AN:

51924

Middle Eastern (MID)

AF:

0.00104

AC:

AN:

5744

European-Non Finnish (NFE)

AF:

0.0000594

AC:

AN:

1111702

Other (OTH)

AF:

0.00101

AC:

AN:

60334

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.500

Heterozygous variant carriers

109

163

218

272

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

Variant carriers

110

<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:

0.00534

AC:

813

AN:

152308

Hom.:

Cov.:

AF XY:

0.00525

AC XY:

391

AN XY:

74482

show subpopulations

African (AFR)

AF:

0.0184

AC:

765

AN:

41560

American (AMR)

AF:

0.00235

AC:

AN:

15310

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3470

East Asian (EAS)

AF:

0.00

AC:

AN:

5180

South Asian (SAS)

AF:

0.000415

AC:

AN:

4824

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10626

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.0000294

AC:

AN:

68018

Other (OTH)

AF:

0.00378

AC:

AN:

2114

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.499

Heterozygous variant carriers

125

166

208

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Genome Hom

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

Alfa

AF:

0.00227

Hom.:

Bravo

AF:

0.00560

ESP6500AA

AF:

0.0176

AC:

ESP6500EA

AF:

0.00

AC:

ExAC

AF:

0.00165

AC:

198

Asia WGS

AF:

0.000577

AC:

AN:

3478

EpiCase

AF:

0.0000545

EpiControl

AF:

0.000119

ClinVar

Significance: Benign

Submissions summary: Benign:2

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Benign:1

Breakthrough Genomics, Breakthrough Genomics

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:not provided

- -

Dyskeratosis congenita, autosomal recessive 5;C4225346:Pulmonary fibrosis and/or bone marrow failure, Telomere-related, 3

Benign:1

Feb 01, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_addAF

Benign

-0.57

BayesDel_noAF

Benign

-0.57

CADD

Benign

0.18

(source)

DANN

Benign

0.56

Eigen

Benign

-1.9

Eigen_PC

Benign

-2.1

FATHMM_MKL

Benign

0.015

LIST_S2

Benign

0.29

MetaRNN

Benign

0.0031

MetaSVM

Benign

-0.99

PhyloP100

-7.3

PROVEAN

Benign

-0.48

REVEL

Benign

0.087

Sift

Benign

0.23

Sift4G

Benign

0.34

Polyphen

0.0010

Vest4

0.11

MVP

0.22

ClinPred

0.0084

GERP RS

-5.5

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.0

gMVP

0.22

Mutation Taster

=99/1

polymorphism

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.040

Details are displayed if max score is > 0.2

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

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over