16-75648339-C-G

Variant names:

• chr16-75648339-C-G
• rs11556640
• NM_018975.4:c.457C>G

Variant summary

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

The NM_018975.4(TERF2IP):​c.457C>G​(p.Arg153Gly) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. 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. R153C) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0 (0 hom.)
  • Failed GnomAD Quality Control
• Consequence: TERF2IP NM_018975.4 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 2.00
• Publications: 2 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: Labcorp Genetics (formerly Invitae), G2P
• hearing loss, autosomal recessive

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
• Charcot-Marie-Tooth disease recessive intermediate B

  Inheritance: Unknown, AR Classification: SUPPORTIVE, LIMITED Submitted by: Labcorp Genetics (formerly Invitae), 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

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_018975.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	TERF2IP	NM_018975.4	MANE Select	c.457C>G	p.Arg153Gly	missense	Exon 1 of 3	NP_061848.2
	TERF2IP	NR_144545.2		n.567C>G		non_coding_transcript_exon	Exon 1 of 3

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	TERF2IP	ENST00000300086.5	TSL:1 MANE Select	c.457C>G	p.Arg153Gly	missense	Exon 1 of 3	ENSP00000300086.4
	KARS1	ENST00000566560.5	TSL:1	n.176+129G>C		intron	N/A
	TERF2IP	ENST00000912662.1		c.457C>G	p.Arg153Gly	missense	Exon 1 of 4	ENSP00000582721.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD2 exomes AF: 0.00 AC: 0 AN: 201770 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: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00

Gnomad OTH exome AF: 0.00

GnomAD4 exome Data not reliable, filtered out with message: AC0 AF: 0.00 AC: 0 AN: 1431542 Hom.: 0 Cov.: 31 AF XY: 0.00 AC XY: 0 AN XY: 709006

African (AFR) AF: 0.00 AC: 0 AN: 33138

American (AMR) AF: 0.00 AC: 0 AN: 39594

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 25448

East Asian (EAS) AF: 0.00 AC: 0 AN: 38546

South Asian (SAS) AF: 0.00 AC: 0 AN: 82016

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 50488

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5736

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1097250

Other (OTH) AF: 0.00 AC: 0 AN: 59326

GnomAD4 genome Cov.: 32

ExAC AF: 0.00000829 AC: 1

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.26
BayesDel_addAF	Benign	-0.089	T
BayesDel_noAF	Benign	-0.37
CADD	Benign	23
DANN	Uncertain	0.99
DEOGEN2	Benign	0.28	T
Eigen	Uncertain	0.21
Eigen_PC	Uncertain	0.25
FATHMM_MKL	Benign	0.32	N
LIST_S2	Benign	0.67	T
M_CAP	Uncertain	0.096	D
MetaRNN	Uncertain	0.69	D
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	1.3	L
PhyloP100		2.0
PrimateAI	Uncertain	0.58	T
PROVEAN	Benign	-1.3	N
REVEL	Benign	0.21
Sift	Benign	0.27	T
Sift4G	Benign	0.28	T
Polyphen		0.94	P
Vest4		0.58
MutPred		0.64		Loss of MoRF binding (P = 0.0252)
MVP		0.54
MPC		1.9
ClinPred		0.87	D
GERP RS		3.6
Varity_R		0.16
gMVP		0.25

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.010		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: rs11556640; hg19: chr16-75682237;