chr8-73039667-A-C

Variant names:

• chr8-73039667-A-C
• rs2306492
• NM_017489.3:c.1143+448A>C

Variant summary

Our verdict is Likely benign. The variant received -2 ACMG points: 2P and 4B. PM2 BP4_Strong

The NM_017489.3(TERF1):​c.1143+448A>C variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000659 in 151,830 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency: Genomes: 𝑓 0.0000066 (0 hom., cov: 31)
• Consequence: TERF1 NM_017489.3 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.267
• Publications: 3 publications found

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

Our verdict: Likely_benign. The variant received -2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.94).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_017489.3. 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
	TERF1	NM_017489.3	MANE Select	c.1143+448A>C		intron	N/A	NP_059523.2
	TERF1	NM_001413364.1		c.1233+448A>C		intron	N/A	NP_001400293.1
	TERF1	NM_001410928.1		c.1173+448A>C		intron	N/A	NP_001397857.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	TERF1	ENST00000276603.10	TSL:1 MANE Select	c.1143+448A>C		intron	N/A	ENSP00000276603.5
	TERF1	ENST00000276602.10	TSL:1	c.1083+448A>C		intron	N/A	ENSP00000276602.6
	TERF1	ENST00000518961.1	TSL:1	n.2285+448A>C		intron	N/A

Frequencies

GnomAD3 genomes AF: 0.00000659 AC: 1 AN: 151830 Hom.: 0 Cov.: 31

Gnomad AFR AF: 0.0000242

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.00

Gnomad OTH AF: 0.00

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

GnomAD4 genome AF: 0.00000659 AC: 1 AN: 151830 Hom.: 0 Cov.: 31 AF XY: 0.00 AC XY: 0 AN XY: 74122

African (AFR) AF: 0.0000242 AC: 1 AN: 41276

American (AMR) AF: 0.00 AC: 0 AN: 15252

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3470

East Asian (EAS) AF: 0.00 AC: 0 AN: 5162

South Asian (SAS) AF: 0.00 AC: 0 AN: 4822

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10544

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 316

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 67990

Other (OTH) AF: 0.00 AC: 0 AN: 2086

Alfa AF: 0.00 Hom.: 9247

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.94
CADD	Benign	0.41
DANN	Benign	0.68
PhyloP100		-0.27

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: rs2306492; hg19: chr8-73951902;