16-75647904-G-T

Variant names:

• chr16-75647904-G-T
• NM_018975.4:c.22G>T

Variant summary

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

The NM_018975.4(TERF2IP):​c.22G>T​(p.Gly8Cys) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: TERF2IP NM_018975.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 2.32
• Publications: 0 publications found

Genes affected

TERF2IP (HGNC:19246): (TERF2 interacting protein) Enables G-rich strand telomeric DNA binding activity and phosphatase binding activity. Involved in several processes, including positive regulation of NIK/NF-kappaB signaling; regulation of nucleobase-containing compound metabolic process; and regulation of protein modification process. Located in chromosome, telomeric region; cytosol; and nuclear body. Part of shelterin complex. [provided by Alliance of Genome Resources, Apr 2022]

KARS1 (HGNC:6215): (lysyl-tRNA synthetase 1) Aminoacyl-tRNA synthetases are a class of enzymes that charge tRNAs with their cognate amino acids. Lysyl-tRNA synthetase is a homodimer localized to the cytoplasm which belongs to the class II family of tRNA synthetases. It has been shown to be a target of autoantibodies in the human autoimmune diseases, polymyositis or dermatomyositis. Alternatively spliced transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Jul 2008]

KARS1 Gene-Disease associations (from GenCC):

• autosomal recessive nonsyndromic hearing loss 89

  Inheritance: AR Classification: STRONG, LIMITED Submitted by: Labcorp Genetics (formerly Invitae), G2P
• leukoencephalopathy, progressive, infantile-onset, with or without deafness

  Inheritance: AR Classification: STRONG Submitted by: G2P, Labcorp Genetics (formerly Invitae)
• Charcot-Marie-Tooth disease recessive intermediate B

  Inheritance: AR, Unknown Classification: SUPPORTIVE, LIMITED Submitted by: Orphanet, Labcorp Genetics (formerly Invitae)
• hearing loss, autosomal recessive

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
• nonsyndromic genetic hearing loss

  Inheritance: AR Classification: LIMITED Submitted by: ClinGen

ACMG classification

Our verdict: Uncertain_significance. The variant received 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
TERF2IP	NM_018975.4	c.22G>T	p.Gly8Cys	missense_variant	Exon 1 of 3	ENST00000300086.5	NP_061848.2
KARS1	NM_005548.3	c.-265C>A		upstream_gene_variant		ENST00000302445.8	NP_005539.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
TERF2IP	ENST00000300086.5	c.22G>T	p.Gly8Cys	missense_variant	Exon 1 of 3	1	NM_018975.4	ENSP00000300086.4
KARS1	ENST00000302445.8	c.-265C>A		upstream_gene_variant		1	NM_005548.3	ENSP00000303043.3

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Mar 04, 2025

Center for Genomic Medicine, Rigshospitalet, Copenhagen University Hospital

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.25
BayesDel_addAF	Benign	-0.0038	T
BayesDel_noAF	Benign	-0.24
CADD	Uncertain	25
DANN	Uncertain	1.0
DEOGEN2	Benign	0.31	T
Eigen	Uncertain	0.24
Eigen_PC	Benign	0.20
FATHMM_MKL	Benign	0.59	D
LIST_S2	Benign	0.75	T
M_CAP	Uncertain	0.17	D
MetaRNN	Uncertain	0.54	D
MetaSVM	Benign	-0.57	T
MutationAssessor	Uncertain	2.4	M
PhyloP100		2.3
PrimateAI	Uncertain	0.61	T
PROVEAN	Benign	-2.2	N
REVEL	Benign	0.25
Sift	Pathogenic	0.0	D
Sift4G	Uncertain	0.0060	D
Polyphen		0.96	D
Vest4		0.47
MutPred		0.52		Gain of methylation at K9 (P = 0.0283);
MVP		0.71
MPC		2.0
ClinPred		0.98	D
GERP RS		3.8
PromoterAI		-0.069	Neutral
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.8
Varity_R		0.48
gMVP		0.72

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

hg19: chr16-75681802;