chr20-63661292-G-A

Variant names:

• chr20-63661292-G-A
• rs57695352
• NM_001283009.2:c.103-6G>A

Variant summary

Our verdict is Benign. The variant received -20 ACMG points: 0P and 20B. BP4_Strong BP6_Very_Strong BA1

The NM_001283009.2(RTEL1):​c.103-6G>A variant causes a splice region, intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00517 in 1,611,458 control chromosomes in the GnomAD database, including 337 homozygotes. In-silico tool predicts a benign outcome for this variant. 3/3 splice prediction tools predict no significant impact on normal splicing. Variant has been reported in ClinVar as Benign (★★).

• Frequency:
  • Genomes: 𝑓 0.027 (175 hom., cov: 33)
  • Exomes 𝑓: 0.0029 (162 hom.)
• Consequence: RTEL1 NM_001283009.2 splice_region, intron
• Scores: Splicing: ADA: 0.00004870
• Clinical Significance: Benign criteria provided, multiple submitters, no conflicts B:5
• Conservation: PhyloP100: -0.949
• Publications: 0 publications found

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-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]

ACMG classification

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

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.88).
• BP6: Variant 20-63661292-G-A is Benign according to our data. Variant chr20-63661292-G-A is described in ClinVar as [Benign]. Clinvar id is 473898.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.
• BA1: GnomAd4 highest subpopulation (AFR) allele frequency at 95% confidence interval = 0.0901 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
RTEL1	NM_001283009.2	c.103-6G>A		splice_region_variant, intron_variant	Intron 2 of 34	ENST00000360203.11	NP_001269938.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
RTEL1	ENST00000360203.11	c.103-6G>A		splice_region_variant, intron_variant	Intron 2 of 34	5	NM_001283009.2	ENSP00000353332.5
RTEL1	ENST00000508582.7	c.103-6G>A		splice_region_variant, intron_variant	Intron 2 of 34	2		ENSP00000424307.2
RTEL1	ENST00000370018.7	c.103-6G>A		splice_region_variant, intron_variant	Intron 2 of 34	1		ENSP00000359035.3
RTEL1-TNFRSF6B	ENST00000492259.6	n.103-6G>A		splice_region_variant, intron_variant	Intron 1 of 34	5		ENSP00000457428.1

Frequencies

GnomAD3 genomes AF: 0.0267 AC: 4057 AN: 152184 Hom.: 175 Cov.: 33

Gnomad AFR AF: 0.0924

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00981

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.000207

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.000632

Gnomad OTH AF: 0.0167

GnomAD2 exomes AF: 0.00707 AC: 1765 AN: 249646 AF XY: 0.00497

Gnomad AFR exome AF: 0.0933

Gnomad AMR exome AF: 0.00489

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad FIN exome AF: 0.0000468

Gnomad NFE exome AF: 0.000525

Gnomad OTH exome AF: 0.00328

GnomAD4 exome AF: 0.00292 AC: 4267 AN: 1459156 Hom.: 162 Cov.: 32 AF XY: 0.00244 AC XY: 1768 AN XY: 725850

African (AFR) AF: 0.0957 AC: 3198 AN: 33406

American (AMR) AF: 0.00510 AC: 228 AN: 44706

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26130

East Asian (EAS) AF: 0.00 AC: 0 AN: 39692

South Asian (SAS) AF: 0.000290 AC: 25 AN: 86164

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 52830

Middle Eastern (MID) AF: 0.00491 AC: 21 AN: 4276

European-Non Finnish (NFE) AF: 0.000374 AC: 416 AN: 1111734

Other (OTH) AF: 0.00629 AC: 379 AN: 60218

GnomAD4 genome AF: 0.0267 AC: 4071 AN: 152302 Hom.: 175 Cov.: 33 AF XY: 0.0259 AC XY: 1932 AN XY: 74486

African (AFR) AF: 0.0925 AC: 3843 AN: 41548

American (AMR) AF: 0.00973 AC: 149 AN: 15306

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3468

East Asian (EAS) AF: 0.00 AC: 0 AN: 5184

South Asian (SAS) AF: 0.000207 AC: 1 AN: 4832

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10628

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 294

European-Non Finnish (NFE) AF: 0.000632 AC: 43 AN: 68016

Other (OTH) AF: 0.0166 AC: 35 AN: 2114

Alfa AF: 0.0139 Hom.: 43

Bravo AF: 0.0303

Asia WGS AF: 0.00491 AC: 18 AN: 3478

EpiCase AF: 0.000382

EpiControl AF: 0.000948

ClinVar

Significance: Benign

Submissions summary: Benign:5

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

not provided Benign:3

Oct 17, 2024

ARUP Laboratories, Molecular Genetics and Genomics, ARUP Laboratories

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

-

Breakthrough Genomics, Breakthrough Genomics

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: not provided

- -

Mar 25, 2019

GeneDx

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Dyskeratosis congenita, autosomal recessive 5;C4225346:Pulmonary fibrosis and/or bone marrow failure, Telomere-related, 3 Benign:1

Feb 03, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Dyskeratosis congenita Benign:1

Sep 16, 2020

Natera, Inc.

Significance: Benign

Review Status: no assertion criteria provided

Collection Method: clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.88
CADD	Benign	0.29
DANN	Benign	0.54
PhyloP100		-0.95
Mutation Taster		=100/0	polymorphism (auto)

Splicing

Name	Calibrated prediction	Score	Prediction
dbscSNV1_ADA	Benign	0.000049
dbscSNV1_RF	Benign	0.030
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

Other links and lift over

dbSNP: rs57695352; hg19: chr20-62292645;