rs1555899096

Variant names:

• chr20-63659451-C-T
• rs1555899096
• NM_001283009.2:c.49C>T

Variant summary

Our verdict is Uncertain significance. The variant received 5 ACMG points: 5P and 0B. PM2 PP3 PP5_Moderate

The NM_001283009.2(RTEL1):​c.49C>T​(p.Pro17Ser) variant causes a missense change. The variant allele was found at a frequency of 0.000000684 in 1,461,832 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Likely pathogenic (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. P17L) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 6.8e-7 (0 hom.)
• Consequence: RTEL1 NM_001283009.2 missense
• Clinical Significance: Likely pathogenic criteria provided, single submitter P:1
• Conservation: PhyloP100: 6.97
• 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: Uncertain_significance. The variant received 5 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.838
• PP5: Variant 20-63659451-C-T is Pathogenic according to our data. Variant chr20-63659451-C-T is described in ClinVar as Likely_pathogenic. ClinVar VariationId is 436596.Status of the report is criteria_provided_single_submitter, 1 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
RTEL1	NM_001283009.2	c.49C>T	p.Pro17Ser	missense_variant	Exon 2 of 35	ENST00000360203.11	NP_001269938.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
RTEL1	ENST00000360203.11	c.49C>T	p.Pro17Ser	missense_variant	Exon 2 of 35	5	NM_001283009.2	ENSP00000353332.5
RTEL1	ENST00000508582.7	c.49C>T	p.Pro17Ser	missense_variant	Exon 2 of 35	2		ENSP00000424307.2
RTEL1	ENST00000370018.7	c.49C>T	p.Pro17Ser	missense_variant	Exon 2 of 35	1		ENSP00000359035.3
RTEL1-TNFRSF6B	ENST00000492259.6	n.49C>T		non_coding_transcript_exon_variant	Exon 1 of 35	5		ENSP00000457428.1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome AF: 6.84e-7 AC: 1 AN: 1461832 Hom.: 0 Cov.: 31 AF XY: 0.00 AC XY: 0 AN XY: 727222

African (AFR) AF: 0.00 AC: 0 AN: 33476

American (AMR) AF: 0.00 AC: 0 AN: 44724

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26136

East Asian (EAS) AF: 0.00 AC: 0 AN: 39700

South Asian (SAS) AF: 0.00 AC: 0 AN: 86254

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53416

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5768

European-Non Finnish (NFE) AF: 8.99e-7 AC: 1 AN: 1111968

Other (OTH) AF: 0.00 AC: 0 AN: 60390

GnomAD4 genome Cov.: 33

ClinVar

Significance: Likely pathogenic

Submissions summary: Pathogenic:1

Revision: criteria provided, single submitter

Submissions by phenotype

Dyskeratosis congenita Pathogenic:1

Oct 11, 2016

Genetic Services Laboratory, University of Chicago

Significance: Likely pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

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Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.91
BayesDel_addAF	Pathogenic	0.41	D
BayesDel_noAF	Pathogenic	0.35
CADD	Uncertain	25
DANN	Uncertain	1.0
DEOGEN2	Uncertain	0.71	D;.;.;.;.
Eigen	Pathogenic	0.83
Eigen_PC	Pathogenic	0.70
FATHMM_MKL	Uncertain	0.94	D
LIST_S2	Uncertain	0.86	D;D;D;T;D
M_CAP	Pathogenic	0.62	D
MetaRNN	Pathogenic	0.84	D;D;D;D;D
MetaSVM	Pathogenic	0.88	D
MutationAssessor	Pathogenic	3.4	M;M;M;.;.
PhyloP100		7.0
PrimateAI	Uncertain	0.56	T
PROVEAN	Pathogenic	-6.7	D;D;D;D;.
REVEL	Uncertain	0.48
Sift	Pathogenic	0.0	D;D;D;D;.
Sift4G	Uncertain	0.0080	D;D;D;D;.
Polyphen		1.0	D;D;D;.;.
Vest4		0.88
MutPred		0.55		Loss of ubiquitination at K19 (P = 0.2243);Loss of ubiquitination at K19 (P = 0.2243);Loss of ubiquitination at K19 (P = 0.2243);Loss of ubiquitination at K19 (P = 0.2243);Loss of ubiquitination at K19 (P = 0.2243);
MVP		0.92
ClinPred		1.0	D
GERP RS		4.9
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.84
gMVP		0.92
Mutation Taster		=7/93	disease causing (ClinVar)

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

Other links and lift over

dbSNP: rs1555899096; hg19: chr20-62290804;