2-232330760-G-T

Position:

• chr2-232330760-G-T

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_152383.5(DIS3L2):​c.1994G>T​(p.Cys665Phe) variant causes a missense change. The variant allele was found at a frequency of 0.000000685 in 1,459,724 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 13/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 6.9e-7 (0 hom.)
• Consequence: DIS3L2 NM_152383.5 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 4.64

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]

ACMG classification

Verdict is Uncertain_significance. Variant got 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.20958835).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
DIS3L2	NM_152383.5	c.1994G>T	p.Cys665Phe	missense_variant	16/21	ENST00000325385.12	NP_689596.4
DIS3L2	NM_001257281.2	c.1582-12585G>T		intron_variant			NP_001244210.1
DIS3L2	NR_046476.2	n.2067G>T		non_coding_transcript_exon_variant	16/21
DIS3L2	NR_046477.2	n.2046G>T		non_coding_transcript_exon_variant	15/19

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
DIS3L2	ENST00000325385.12	c.1994G>T	p.Cys665Phe	missense_variant	16/21	5	NM_152383.5	ENSP00000315569	P1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome AF: 6.85e-7 AC: 1 AN: 1459724 Hom.: 0 Cov.: 31 AF XY: 0.00 AC XY: 0 AN XY: 726294

Gnomad4 AFR exome AF: 0.0000299

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: 0.00

GnomAD4 genome Cov.: 33

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Perlman syndrome Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Mar 19, 2022

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. Algorithms developed to predict the effect of missense changes on protein structure and function output the following: SIFT: "Tolerated"; PolyPhen-2: "Benign"; Align-GVGD: "Class C0". The phenylalanine amino acid residue is found in multiple mammalian species, which suggests that this missense change does not adversely affect protein function. This variant has not been reported in the literature in individuals affected with DIS3L2-related conditions. This variant is not present in population databases (gnomAD no frequency). This sequence change replaces cysteine, which is neutral and slightly polar, with phenylalanine, which is neutral and non-polar, at codon 665 of the DIS3L2 protein (p.Cys665Phe). -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.15
BayesDel_addAF	Benign	-0.18	T
BayesDel_noAF	Benign	-0.50
CADD	Benign	22
DANN	Benign	0.85
DEOGEN2	Benign	0.16	T;T;T
Eigen	Benign	-0.34
Eigen_PC	Benign	-0.17
FATHMM_MKL	Uncertain	0.81	D
LIST_S2	Benign	0.78	T;.;T
M_CAP	Benign	0.017	T
MetaRNN	Benign	0.21	T;T;T
MetaSVM	Benign	-1.1	T
MutationAssessor	Benign	0.79	N;N;.
MutationTaster	Benign	0.96	D;D;D
PrimateAI	Benign	0.37	T
PROVEAN	Uncertain	-3.2	D;D;N
REVEL	Benign	0.097
Sift	Benign	0.53	T;T;T
Sift4G	Benign	0.66	T;T;T
Polyphen		0.0010	B;B;.
Vest4		0.33
MutPred		0.57		Loss of helix (P = 0.2271);Loss of helix (P = 0.2271);.;
MVP		0.043
MPC		0.34
ClinPred		0.90	D
GERP RS		3.0
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.24
gMVP		0.85

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

Publications

LitVar

Other links and lift over

dbSNP: rs778990530; hg19: chr2-233195470;