chr2-232014928-A-G

Variant names:

• chr2-232014928-A-G
• NM_152383.5:c.1A>G

Variant summary

Our verdict is Uncertain significance. Variant got 3 ACMG points: 3P and 0B. PVS1_Supporting PM2

The NM_152383.5(DIS3L2):​c.1A>G​(p.Met1?) variant causes a start lost change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 33)
• Consequence: DIS3L2 NM_152383.5 start_lost
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 3.19

Genes affected

DIS3L2 (HGNC:28648): (DIS3 like 3'-5' exoribonuclease 2) The protein encoded by this gene is similar in sequence to 3'/5' exonucleolytic subunits of the RNA exosome. The exosome is a large multimeric ribonucleotide complex responsible for degrading various RNA substrates. Several transcript variants, some protein-coding and some not, have been found for this gene. [provided by RefSeq, Mar 2012]

ENSG00000227033 (HGNC:):

ACMG classification

Verdict is Uncertain_significance. Variant got 3 ACMG points.

• PVS1: Start lost variant, no pathogenic variants between lost start and next in-frame start position. Next in-frame start position is after 8 codons. Genomic position: 232014949. Lost 0.008 part of the original CDS.
• PM2: Very rare variant in population databases, with high coverage

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
DIS3L2	NM_152383.5	c.1A>G	p.Met1?	start_lost	Exon 2 of 21	ENST00000325385.12	NP_689596.4

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
DIS3L2	ENST00000325385.12	c.1A>G	p.Met1?	start_lost	Exon 2 of 21	5	NM_152383.5	ENSP00000315569.7

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 30

GnomAD4 genome Cov.: 33

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Perlman syndrome Uncertain:1

Nov 05, 2023

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change affects the initiator methionine of the DIS3L2 mRNA. The next in-frame methionine is located at codon 8. This variant is not present in population databases (gnomAD no frequency). This variant has not been reported in the literature in individuals affected with DIS3L2-related conditions. ClinVar contains an entry for this variant (Variation ID: 1363990). RNA analysis performed to evaluate the impact of disruption of the initiator codon on mRNA splicing indicates it does not significantly alter splicing (Invitae). In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Pathogenic	0.18	D
BayesDel_noAF	Uncertain	0.020
CADD	Uncertain	23
DANN	Uncertain	0.99
DEOGEN2	Benign	0.0087	.;T;.;T;T
Eigen	Benign	-0.044
Eigen_PC	Benign	0.098
FATHMM_MKL	Uncertain	0.94	D
LIST_S2	Uncertain	0.90	D;D;.;D;.
M_CAP	Uncertain	0.10	D
MetaRNN	Pathogenic	0.96	D;D;D;D;D
MetaSVM	Benign	-1.0	T
PROVEAN	Benign	-0.97	N;N;N;N;N
REVEL	Benign	0.26
Sift	Pathogenic	0.0	D;D;D;D;D
Sift4G	Pathogenic	0.0	D;D;D;D;D
Polyphen		0.029, 0.11	.;B;B;.;B
Vest4		0.66
MutPred		1.0		Loss of MoRF binding (P = 0.1206);Loss of MoRF binding (P = 0.1206);Loss of MoRF binding (P = 0.1206);Loss of MoRF binding (P = 0.1206);Loss of MoRF binding (P = 0.1206);
MVP		0.18
ClinPred		1.0	D
GERP RS		5.8
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.72
gMVP		0.43

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.27		Details are displayed if max score is > 0.2
DS_DG_spliceai		0.27		Position offset: -1

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: chr2-232879638;