rs953069213

chr20-63692934-T-Achr20-63692934-T-G

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 2P and 1B. PM2 BP4

The NM_001283009.2(RTEL1):c.2782T>A(p.Phe928Ile) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. 11/19 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. F928V) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 33)
• Consequence: RTEL1 NM_001283009.2 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.370

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

Verdict is Uncertain_significance. Variant got 1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.33491072).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
RTEL1	NM_001283009.2	c.2782T>A	p.Phe928Ile	missense_variant	29/35	ENST00000360203.11
RTEL1-TNFRSF6B	NR_037882.1	n.3609T>A		non_coding_transcript_exon_variant	29/38

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
RTEL1	ENST00000360203.11	c.2782T>A	p.Phe928Ile	missense_variant	29/35	5	NM_001283009.2	A2

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 33

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.12
BayesDel_addAF	Benign	-0.20	T
BayesDel_noAF	Benign	-0.52
Cadd	Benign	14
Dann	Uncertain	0.98
DEOGEN2	Uncertain	0.52	D;.;.;.
Eigen	Benign	-0.43
Eigen_PC	Benign	-0.50
FATHMM_MKL	Uncertain	0.82	D
LIST_S2	Benign	0.78	T;T;T;T
M_CAP	Benign	0.046	D
MetaRNN	Benign	0.33	T;T;T;T
MetaSVM	Benign	-1.0	T
MutationAssessor	Uncertain	2.5	M;.;M;.
MutationTaster	Benign	0.77	D;D;D;D;N
PrimateAI	Benign	0.47	T
PROVEAN	Uncertain	-3.2	D;D;D;.
REVEL	Benign	0.070
Sift	Uncertain	0.010	D;D;D;.
Sift4G	Uncertain	0.051	T;D;T;D
Polyphen		0.44	B;B;B;.
Vest4		0.31
MutPred		0.49		Loss of catalytic residue at F928 (P = 0.0962);.;Loss of catalytic residue at F928 (P = 0.0962);.;
MVP		0.30
ClinPred		0.91	D
GERP RS		1.1
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.24
gMVP		0.47

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.010		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

Other links and lift over

dbSNP: rs953069213; hg19: chr20-62324287;