20-63691785-C-T

Variant names:

Variant summary

Our verdict is Benign. Variant got -8 ACMG points: 0P and 8B. BP4_StrongBS2

The NM_001283009.2(RTEL1):c.2600C>T(p.Pro867Leu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000726 in 1,612,468 control chromosomes in the GnomAD database, including 3 homozygotes. In-silico tool predicts a benign outcome for this variant. 15/20 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★).

Frequency

Genomes: 𝑓 0.00064 ( 0 hom., cov: 32)

Exomes 𝑓: 0.00073 ( 3 hom. )

Consequence

RTEL1
NM_001283009.2 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:8

Conservation

PhyloP100: 0.143

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 made for transcript

Verdict is Benign. Variant got -8 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.005922228).

BS2

High Homozygotes in GnomAdExome4 at 3 AD,AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
RTEL1	NM_001283009.2 link	c.2600C>T	p.Pro867Leu	missense_variant	Exon 28 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.2600C>T	p.Pro867Leu	missense_variant	Exon 28 of 35	5	NM_001283009.2	ENSP00000353332.5	Q9NZ71-6
RTEL1	ENST00000508582.7 link	c.2672C>T	p.Pro891Leu	missense_variant	Exon 28 of 35	2		ENSP00000424307.2	Q9NZ71-7
RTEL1	ENST00000370018.7 link	c.2600C>T	p.Pro867Leu	missense_variant	Exon 28 of 35	1		ENSP00000359035.3	Q9NZ71-1
RTEL1-TNFRSF6B	ENST00000492259.6 link	n.*202C>T		non_coding_transcript_exon_variant	Exon 25 of 35	5		ENSP00000457428.1	D6RA96
RTEL1-TNFRSF6B	ENST00000492259.6 link	n.*202C>T		3_prime_UTR_variant	Exon 25 of 35	5		ENSP00000457428.1	D6RA96

Frequencies

GnomAD3 genomes

AF:

0.000644

AC:

AN:

152110

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000362

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000327

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:

0.00113

Gnomad OTH

AF:

0.000479

GnomAD3 exomes

AF:

0.000450

AC:

112

AN:

248858

Hom.:

AF XY:

0.000459

AC XY:

AN XY:

135162

show subpopulations

Gnomad AFR exome

AF:

0.000373

Gnomad AMR exome

AF:

0.000405

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.0000463

Gnomad NFE exome

AF:

0.000780

Gnomad OTH exome

AF:

0.000656

GnomAD4 exome

AF:

0.000734

AC:

1072

AN:

1460240

Hom.:

Cov.:

AF XY:

0.000749

AC XY:

544

AN XY:

726416

show subpopulations

Gnomad4 AFR exome

AF:

0.000448

Gnomad4 AMR exome

AF:

0.000425

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.0000385

Gnomad4 NFE exome

AF:

0.000879

Gnomad4 OTH exome

AF:

0.000961

GnomAD4 genome

AF:

0.000644

AC:

AN:

152228

Hom.:

Cov.:

AF XY:

0.000524

AC XY:

AN XY:

74402

show subpopulations

Gnomad4 AFR

AF:

0.000361

Gnomad4 AMR

AF:

0.000327

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00113

Gnomad4 OTH

AF:

0.000474

Alfa

AF:

0.000834

Hom.:

Bravo

AF:

0.000582

TwinsUK

AF:

0.000809

AC:

ALSPAC

AF:

0.000519

AC:

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000931

AC:

ExAC

AF:

0.000431

AC:

Asia WGS

AF:

0.000289

AC:

AN:

3478

EpiCase

AF:

0.00104

EpiControl

AF:

0.000474

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:8

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

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

Uncertain:3

Jan 18, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change replaces proline, which is neutral and non-polar, with leucine, which is neutral and non-polar, at codon 867 of the RTEL1 protein (p.Pro867Leu). This variant is present in population databases (rs139083375, gnomAD 0.08%), and has an allele count higher than expected for a pathogenic variant. This missense change has been observed in individual(s) with hematological abnormalities (PMID: 29344583). ClinVar contains an entry for this variant (Variation ID: 436589). An algorithm developed to predict the effect of missense changes on protein structure and function outputs the following: PolyPhen-2: "Benign". The leucine amino acid residue is found in multiple mammalian species, which suggests that this missense change does not adversely affect protein function. 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. -

Apr 04, 2024

Fulgent Genetics, Fulgent Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Mar 30, 2021

Center for Genomics, Ann and Robert H. Lurie Children's Hospital of Chicago

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

RTEL1 NM_032957.4 exon 28 p.Pro891Leu (c.2672C>T): This variant has not been reported in the literature but is present in 0.07% (95/126948) of European alleles in the Genome Aggregation Database (https://gnomad.broadinstitute.org/variant/20-62323138-C-T). This variant is present in ClinVar (Variation ID:436589). This variant amino acid Leucine (Leu) is present in >20 species and is not well conserved among evolutionarily distant species; this suggests that this variant may not impact the protein. Additional computational prediction tools do not suggest an impact. In summary, data on this variant is insufficient for disease classification. Therefore, the clinical significance of this variant is uncertain. -

Dyskeratosis congenita

Uncertain:2

Jan 17, 2020

Natera, Inc.

Significance: Uncertain significance

Review Status: no assertion criteria provided

Collection Method: clinical testing

- -

Nov 16, 2021

Sema4, Sema4

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: curation

- -

not specified

Uncertain:1

Dec 07, 2015

Genetic Services Laboratory, University of Chicago

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

not provided

Uncertain:1

Feb 27, 2024

GeneDx

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Observed in individuals with macrocytosis and aplastic anemia (PMID: 29344583); In silico analysis supports that this missense variant does not alter protein structure/function; Also known as P867L; This variant is associated with the following publications: (PMID: 29344583) -

Pulmonary fibrosis and/or bone marrow failure, Telomere-related, 3

Uncertain:1

Feb 05, 2018

Baylor Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This variant was determined to be of uncertain significance according to ACMG Guidelines, 2015 [PMID:25741868]. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.058

BayesDel_addAF

Benign

-0.58

BayesDel_noAF

Benign

-0.69

CADD

Benign

5.4

DANN

Benign

0.69

DEOGEN2

Benign

0.052

T;.;.;.

Eigen

Benign

-1.3

Eigen_PC

Benign

-1.3

FATHMM_MKL

Benign

0.10

LIST_S2

Benign

0.51

T;T;T;T

M_CAP

Benign

0.011

MetaRNN

Benign

0.0059

T;T;T;T

MetaSVM

Benign

-0.96

MutationAssessor

Benign

-1.2

N;.;N;.

PrimateAI

Benign

0.29

PROVEAN

Benign

1.1

N;N;N;.

REVEL

Benign

0.010

Sift

Benign

0.72

T;T;T;.

Sift4G

Benign

0.44

T;T;T;T

Polyphen

0.0010

B;B;B;.

Vest4

0.092

MVP

0.082

ClinPred

0.0011

GERP RS

1.0

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.1

Varity_R

0.024

gMVP

0.17

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

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