NM_017489.3:c.770T>C

Variant names:

• chr8-73024967-T-C
• rs55834252
• NM_017489.3:c.770T>C

Variant summary

Our verdict is Uncertain significance. The variant received 1 ACMG points: 2P and 1B. PM2 BP4

The NM_017489.3(TERF1):​c.770T>C​(p.Met257Thr) 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. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency: Genomes: not found (cov: 32)
• Consequence: TERF1 NM_017489.3 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 2.94
• Publications: 2 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: Uncertain_significance. The variant received 1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.40979216).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
TERF1	NM_017489.3	c.770T>C	p.Met257Thr	missense_variant	Exon 5 of 10	ENST00000276603.10	NP_059523.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
TERF1	ENST00000276603.10	c.770T>C	p.Met257Thr	missense_variant	Exon 5 of 10	1	NM_017489.3	ENSP00000276603.5

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 26

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.70
BayesDel_addAF	Uncertain	0.092	D
BayesDel_noAF	Benign	-0.11
CADD	Uncertain	25
DANN	Uncertain	0.99
DEOGEN2	Uncertain	0.57	D;.;T
Eigen	Uncertain	0.39
Eigen_PC	Uncertain	0.46
FATHMM_MKL	Uncertain	0.84	D
LIST_S2	Benign	0.81	T;T;T
M_CAP	Benign	0.013	T
MetaRNN	Benign	0.41	T;T;T
MetaSVM	Benign	-0.61	T
MutationAssessor	Uncertain	2.3	M;M;.
PhyloP100		2.9
PrimateAI	Uncertain	0.58	T
PROVEAN	Uncertain	-2.7	D;D;D
REVEL	Benign	0.19
Sift	Uncertain	0.0040	D;D;D
Sift4G	Uncertain	0.020	D;D;D
Vest4		0.56
ClinPred		0.97	D
GERP RS		5.8
Varity_R		0.66
gMVP		0.26
Mutation Taster		=51/49	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: rs55834252; hg19: chr8-73937202;