rs672601332

Variant names:

• chr9-37780795-A-G
• rs672601332
• NM_016042.4:c.712T>C

Variant summary

Our verdict is Likely pathogenic. The variant received 8 ACMG points: 8P and 0B. PM2 PP3_Strong PP5_Moderate

The NM_016042.4(EXOSC3):​c.712T>C​(p.Trp238Arg) variant causes a missense change involving the alteration of a 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 Likely pathogenic (★).

• Frequency: Genomes: not found (cov: 31)
• Consequence: EXOSC3 NM_016042.4 missense
• Clinical Significance: Likely pathogenic criteria provided, single submitter P:2
• Conservation: PhyloP100: 8.68
• Publications: 14 publications found

Genes affected

EXOSC3 (HGNC:17944): (exosome component 3) This gene encodes a non-catalytic component of the human exosome, a complex with 3'-5' exoribonuclease activity that plays a role in numerous RNA processing and degradation activities. Related pseudogenes of this gene are found on chromosome 19 and 21. Alternatively spliced transcript variants encoding different isoforms have been described. [provided by RefSeq, Jun 2012]

EXOSC3 Gene-Disease associations (from GenCC):

• pontocerebellar hypoplasia type 1B

  Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: PanelApp Australia, Labcorp Genetics (formerly Invitae), Genomics England PanelApp, G2P, Illumina
• pontocerebellar hypoplasia type 1

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

ENSG00000255872 (HGNC:):

ACMG classification

Our verdict: Likely_pathogenic. The variant received 8 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.939
• PP5: Variant 9-37780795-A-G is Pathogenic according to our data. Variant chr9-37780795-A-G is described in ClinVar as [Likely_pathogenic]. Clinvar id is 31692.Status of the report is criteria_provided_single_submitter, 1 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
EXOSC3	NM_016042.4	c.712T>C	p.Trp238Arg	missense_variant	Exon 4 of 4	ENST00000327304.10	NP_057126.2
EXOSC3	NM_001002269.2	c.*65T>C		3_prime_UTR_variant	Exon 3 of 3		NP_001002269.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
EXOSC3	ENST00000327304.10	c.712T>C	p.Trp238Arg	missense_variant	Exon 4 of 4	1	NM_016042.4	ENSP00000323046.4
ENSG00000255872	ENST00000540557.1	n.*910+3119T>C		intron_variant	Intron 9 of 11	5		ENSP00000457548.1

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 31

ClinVar

Significance: Likely pathogenic

Submissions summary: Pathogenic:2

Revision: criteria provided, single submitter

Submissions by phenotype

Pontocerebellar hypoplasia type 1B Pathogenic:2

May 13, 2023

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Likely pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

In summary, the currently available evidence indicates that the variant is pathogenic, but additional data are needed to prove that conclusively. Therefore, this variant has been classified as Likely Pathogenic. Experimental studies have shown that this missense change affects EXOSC3 function (PMID: 22544365, 27777260, 28053271). Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) performed at Invitae indicates that this missense variant is expected to disrupt EXOSC3 protein function. ClinVar contains an entry for this variant (Variation ID: 31692). This missense change has been observed in individual(s) with pontocerebellar hypoplasia (PMID: 22544365). In at least one individual the data is consistent with being in trans (on the opposite chromosome) from a pathogenic variant. It has also been observed to segregate with disease in related individuals. This variant is not present in population databases (gnomAD no frequency). This sequence change replaces tryptophan, which is neutral and slightly polar, with arginine, which is basic and polar, at codon 238 of the EXOSC3 protein (p.Trp238Arg). -

Apr 29, 2012

OMIM

Significance: Pathogenic

Review Status: no assertion criteria provided

Collection Method: literature only

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	1.0
BayesDel_addAF	Pathogenic	0.45	D
BayesDel_noAF	Pathogenic	0.41
CADD	Pathogenic	29
DANN	Uncertain	1.0
DEOGEN2	Uncertain	0.49	T
Eigen	Pathogenic	0.98
Eigen_PC	Pathogenic	0.92
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Benign	0.85	D
M_CAP	Uncertain	0.27	D
MetaRNN	Pathogenic	0.94	D
MetaSVM	Uncertain	0.78	D
MutationAssessor	Pathogenic	3.1	M
PhyloP100		8.7
PrimateAI	Pathogenic	0.88	D
PROVEAN	Pathogenic	-14	D
REVEL	Pathogenic	0.84
Sift	Pathogenic	0.0	D
Sift4G	Pathogenic	0.0	D
Polyphen		1.0	D
Vest4		0.96
MutPred		0.77		Gain of helix (P = 0.0143);
MVP		0.92
MPC		0.81
ClinPred		1.0	D
GERP RS		5.7
Varity_R		0.99
gMVP		0.93
Mutation Taster		=1/99	disease causing (ClinVar)

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

Other links and lift over

dbSNP: rs672601332; hg19: chr9-37780792;