8-73014208-C-T

Position:

• chr8-73014208-C-T

Variant summary

Our verdict is Benign. Variant got -20 ACMG points: 0P and 20B. BP4_Strong BP6_Very_Strong BA1

The NM_017489.3(TERF1):​c.415+218C>T variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.029 in 145,530 control chromosomes in the GnomAD database, including 186 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★★).

• Frequency: Genomes: 𝑓 0.029 (186 hom., cov: 31)
• Consequence: TERF1 NM_017489.3 intron
• Clinical Significance: Benign criteria provided, multiple submitters, no conflicts B:2
• Conservation: PhyloP100: -0.164

Genes affected

TERF1 (HGNC:11728): (telomeric repeat binding factor 1) This gene encodes a telomere specific protein which is a component of the telomere nucleoprotein complex. This protein is present at telomeres throughout the cell cycle and functions as an inhibitor of telomerase, acting in cis to limit the elongation of individual chromosome ends. The protein structure contains a C-terminal Myb motif, a dimerization domain near its N-terminus and an acidic N-terminus. Multiple transcripts of this gene are alternatively spliced products. [provided by RefSeq, Aug 2022]

ACMG classification

Verdict is Benign. Variant got -20 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.85).
• BP6: Variant 8-73014208-C-T is Benign according to our data. Variant chr8-73014208-C-T is described in ClinVar as [Benign]. Clinvar id is 1250469.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.
• BA1: GnomAd4 highest subpopulation (AFR) allele frequency at 95% confidence interval = 0.0998 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
TERF1	NM_017489.3	c.415+218C>T		intron_variant		ENST00000276603.10

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
TERF1	ENST00000276603.10	c.415+218C>T		intron_variant		1	NM_017489.3	P4

Frequencies

GnomAD3 genomes AF: 0.0288 AC: 4193 AN: 145418 Hom.: 183 Cov.: 31

Gnomad AFR AF: 0.102

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.0116

Gnomad ASJ AF: 0.000873

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.000678

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.000373

Gnomad OTH AF: 0.0213

We have no GnomAD4 exomes data on this position. Probably position not covered by the project.

GnomAD4 genome AF: 0.0290 AC: 4217 AN: 145530 Hom.: 186 Cov.: 31 AF XY: 0.0280 AC XY: 1977 AN XY: 70502

Gnomad4 AFR AF: 0.102

Gnomad4 AMR AF: 0.0116

Gnomad4 ASJ AF: 0.000873

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.000679

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.000373

Gnomad4 OTH AF: 0.0210

Alfa AF: 0.0220 Hom.: 9

Bravo AF: 0.0321

Asia WGS AF: 0.00635 AC: 22 AN: 3478

ClinVar

Significance: Benign

Submissions summary: Benign:2

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

not provided Benign:2

Benign, criteria provided, single submitter	clinical testing	GeneDx	Jun 15, 2019	- -
Benign, criteria provided, single submitter	not provided	Breakthrough Genomics, Breakthrough Genomics	-	- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.85
CADD	Benign	4.5
DANN	Benign	0.71

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

Other links and lift over

dbSNP: rs55883331; hg19: chr8-73926443;