chr20-63694435-A-C

Variant names:

• chr20-63694435-A-C
• rs116053476
• NM_001283009.2:c.3056A>C

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_001283009.2(RTEL1):​c.3056A>C​(p.Gln1019Pro) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000205 in 1,459,932 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 16/22 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. Q1019R) has been classified as Likely benign.

• Frequency:
  • Genomes: not found (cov: 31)
  • Exomes 𝑓: 0.0000021 (0 hom.)
• Consequence: RTEL1 NM_001283009.2 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.676
• Publications: 2 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 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.07123485).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001283009.2. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	RTEL1	NM_001283009.2	MANE Select	c.3056A>C	p.Gln1019Pro	missense	Exon 31 of 35	NP_001269938.1
	RTEL1	NM_032957.5		c.3128A>C	p.Gln1043Pro	missense	Exon 31 of 35	NP_116575.3
	RTEL1	NM_016434.4		c.3056A>C	p.Gln1019Pro	missense	Exon 31 of 35	NP_057518.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	RTEL1	ENST00000360203.11	TSL:5 MANE Select	c.3056A>C	p.Gln1019Pro	missense	Exon 31 of 35	ENSP00000353332.5
	RTEL1	ENST00000508582.7	TSL:2	c.3128A>C	p.Gln1043Pro	missense	Exon 31 of 35	ENSP00000424307.2
	RTEL1	ENST00000370018.7	TSL:1	c.3056A>C	p.Gln1019Pro	missense	Exon 31 of 35	ENSP00000359035.3

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD2 exomes AF: 0.00000405 AC: 1 AN: 246902 AF XY: 0.00

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.0000545

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000205 AC: 3 AN: 1459932 Hom.: 0 Cov.: 33 AF XY: 0.00000138 AC XY: 1 AN XY: 726170

African (AFR) AF: 0.00 AC: 0 AN: 33474

American (AMR) AF: 0.00 AC: 0 AN: 44714

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26118

East Asian (EAS) AF: 0.0000252 AC: 1 AN: 39686

South Asian (SAS) AF: 0.00 AC: 0 AN: 86234

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 52072

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5764

European-Non Finnish (NFE) AF: 0.00000180 AC: 2 AN: 1111526

Other (OTH) AF: 0.00 AC: 0 AN: 60344

GnomAD4 genome Cov.: 31

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.084
BayesDel_addAF	Benign	-0.21	T
BayesDel_noAF	Benign	-0.38
CADD	Benign	13
DANN	Benign	0.86
DEOGEN2	Benign	0.14	T
Eigen	Benign	-1.1
Eigen_PC	Benign	-1.0
FATHMM_MKL	Benign	0.069	N
LIST_S2	Benign	0.19	T
M_CAP	Uncertain	0.15	D
MetaRNN	Benign	0.071	T
MetaSVM	Benign	-0.72	T
MutationAssessor	Benign	0.0	N
PhyloP100		0.68
PrimateAI	Benign	0.22	T
PROVEAN	Benign	-0.94	N
REVEL	Benign	0.12
Sift	Benign	0.17	T
Sift4G	Benign	0.28	T
Polyphen		0.0010	B
Vest4		0.21
MutPred		0.22		Gain of loop (P = 0.0045)
MVP		0.43
ClinPred		0.049	T
GERP RS		1.8
Varity_R		0.16
gMVP		0.31
Mutation Taster		=96/4	polymorphism

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: rs116053476; hg19: chr20-62325788;