2-232333894-T-C

Position:

• chr2-232333894-T-C

Variant summary

Our verdict is Uncertain significance. Variant got 3 ACMG points: 3P and 0B. PM2 PP3

The NM_152383.5(DIS3L2):​c.2065T>C​(p.Tyr689His) variant causes a missense change. 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 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 6.05

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]

DIS3L2 (HGNC:):

ACMG classification

Verdict is Uncertain_significance. Variant got 3 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.833

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
DIS3L2	NM_152383.5	c.2065T>C	p.Tyr689His	missense_variant	17/21	ENST00000325385.12	NP_689596.4
DIS3L2	NM_001257281.2	c.1582-9451T>C		intron_variant			NP_001244210.1
DIS3L2	NR_046476.2	n.2138T>C		non_coding_transcript_exon_variant	17/21
DIS3L2	NR_046477.2	n.2117T>C		non_coding_transcript_exon_variant	16/19

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
DIS3L2	ENST00000325385.12	c.2065T>C	p.Tyr689His	missense_variant	17/21	5	NM_152383.5	ENSP00000315569.7

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 32

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

Oct 06, 2020

In summary, this variant is a novel missense change with uncertain impact on protein function. It has been classified as a Variant of Uncertain Significance. Algorithms developed to predict the effect of missense changes on protein structure and function (SIFT, PolyPhen-2, Align-GVGD) all suggest that this variant is likely to be disruptive, but these predictions have not been confirmed by published functional studies. This variant is not present in population databases (ExAC no frequency) and has not been reported in the literature in individuals with a DIS3L2-related disease. This sequence change replaces tyrosine with histidine at codon 689 of the DIS3L2 protein (p.Tyr689His). The tyrosine residue is highly conserved and there is a moderate physicochemical difference between tyrosine and histidine. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.90
BayesDel_addAF	Pathogenic	0.26	D
BayesDel_noAF	Uncertain	0.13
CADD	Uncertain	25
DANN	Uncertain	1.0
DEOGEN2	Benign	0.38	T;T;T
Eigen	Pathogenic	0.77
Eigen_PC	Uncertain	0.61
FATHMM_MKL	Uncertain	0.86	D
LIST_S2	Uncertain	0.96	D;.;D
M_CAP	Uncertain	0.18	D
MetaRNN	Pathogenic	0.83	D;D;D
MetaSVM	Uncertain	0.21	D
MutationAssessor	Pathogenic	3.2	M;M;.
PrimateAI	Uncertain	0.75	T
PROVEAN	Pathogenic	-4.5	D;D;D
REVEL	Uncertain	0.54
Sift	Pathogenic	0.0	D;D;D
Sift4G	Pathogenic	0.0	D;D;D
Polyphen		1.0	D;D;.
Vest4		0.97
MutPred		0.78		Gain of disorder (P = 0.0626);Gain of disorder (P = 0.0626);.;
MVP		0.068
MPC		0.94
ClinPred		1.0	D
GERP RS		4.3
Varity_R		0.91
gMVP		0.91

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

LitVar

Other links and lift over

dbSNP: rs1060503039; hg19: chr2-233198604;