1-156727247-A-T

Position:

• chr1-156727247-A-T

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2 BP4_Strong

The NM_001370150.2(ISG20L2):​c.406T>A​(p.Ser136Thr) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000137 in 1,461,780 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 15/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000014 (0 hom.)
• Consequence: ISG20L2 NM_001370150.2 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: -0.727

Genes affected

ISG20L2 (HGNC:25745): (interferon stimulated exonuclease gene 20 like 2) This gene encodes a 3'-5' exoribonuclease that may be involved in the processing of the 12S pre-rRNA. Pseudogenes have been identified on chromosomes 6 and 11. [provided by RefSeq, Dec 2014]

ACMG classification

Verdict is Likely_benign. Variant got -2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.046269298).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
ISG20L2	NM_001370150.2	c.406T>A	p.Ser136Thr	missense_variant	2/4	ENST00000368219.2	NP_001357079.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
ISG20L2	ENST00000368219.2	c.406T>A	p.Ser136Thr	missense_variant	2/4	5	NM_001370150.2	ENSP00000357202	P1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 0.00000137 AC: 2 AN: 1461780 Hom.: 0 Cov.: 32 AF XY: 0.00 AC XY: 0 AN XY: 727182

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00

Gnomad4 OTH exome AF: 0.0000166

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Mar 14, 2024

The c.406T>A (p.S136T) alteration is located in exon 1 (coding exon 1) of the ISG20L2 gene. This alteration results from a T to A substitution at nucleotide position 406, causing the serine (S) at amino acid position 136 to be replaced by a threonine (T). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.068
BayesDel_addAF	Benign	-0.34	T
BayesDel_noAF	Benign	-0.73
CADD	Benign	0.66
DANN	Benign	0.68
DEOGEN2	Benign	0.0022	T;T
Eigen	Benign	-1.3
Eigen_PC	Benign	-1.3
FATHMM_MKL	Benign	0.093	N
LIST_S2	Benign	0.43	.;T
M_CAP	Benign	0.0030	T
MetaRNN	Benign	0.046	T;T
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	1.2	L;L
MutationTaster	Benign	1.0	N;N
PrimateAI	Benign	0.28	T
PROVEAN	Benign	0.23	N;N
REVEL	Benign	0.045
Sift	Benign	1.0	T;T
Sift4G	Benign	0.78	T;T
Polyphen		0.0030	B;B
Vest4		0.064
MutPred		0.15		Gain of sheet (P = 0.0477);Gain of sheet (P = 0.0477);
MVP		0.34
MPC		0.27
ClinPred		0.051	T
GERP RS		-2.1
Varity_R		0.11
gMVP		0.22

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

No publications associated with this variant yet.

Other links and lift over

hg19: chr1-156697039;