chr13-37000814-T-C

Variant names:

• chr13-37000814-T-C
• rs150115898
• NM_181503.3:c.9T>C

Variant summary

Our verdict is Likely benign. The variant received -3 ACMG points: 2P and 5B. PM2 BP4_Strong BP7

The NM_181503.3(EXOSC8):​c.9T>C​(p.Ala3Ala) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000007 in 1,428,196 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Synonymous variant affecting the same amino acid position (i.e. A3A) has been classified as Likely benign.

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 7.0e-7 (0 hom.)
• Consequence: EXOSC8 NM_181503.3 synonymous
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -1.45
• Publications: 0 publications found

Genes affected

EXOSC8 (HGNC:17035): (exosome component 8) This gene encodes a 3'-5' exoribonuclease that specifically interacts with mRNAs containing AU-rich elements. The encoded protein is part of the exosome complex that is important for the degradation of numerous RNA species. A pseudogene of this gene is found on chromosome 6. [provided by RefSeq, Mar 2009]

ALG5 (HGNC:20266): (ALG5 dolichyl-phosphate beta-glucosyltransferase) This gene encodes a member of the glycosyltransferase 2 family. The encoded protein participates in glucosylation of the oligomannose core in N-linked glycosylation of proteins. The addition of glucose residues to the oligomannose core is necessary to ensure substrate recognition, and therefore, effectual transfer of the oligomannose core to the nascent glycoproteins. Multiple transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Nov 2008]

ALG5 Gene-Disease associations (from GenCC):

• polycystic kidney disease 7

  Inheritance: AD Classification: STRONG, LIMITED Submitted by: Ambry Genetics, Labcorp Genetics (formerly Invitae)
• autosomal dominant polycystic kidney disease

  Inheritance: AD Classification: MODERATE Submitted by: ClinGen

ACMG classification

Our verdict: Likely_benign. The variant received -3 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.53).
• BP7: Synonymous conserved (PhyloP=-1.45 with no splicing effect.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_181503.3. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	EXOSC8	NM_181503.3	MANE Select	c.9T>C	p.Ala3Ala	synonymous	Exon 1 of 11	NP_852480.1	Q96B26

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	EXOSC8	ENST00000389704.4	TSL:1 MANE Select	c.9T>C	p.Ala3Ala	synonymous	Exon 1 of 11	ENSP00000374354.3	Q96B26
	EXOSC8	ENST00000490537.6	TSL:1	n.28T>C		non_coding_transcript_exon	Exon 1 of 10
	EXOSC8	ENST00000686729.1		c.9T>C	p.Ala3Ala	synonymous	Exon 1 of 10	ENSP00000509000.1	A0A8I5KRG4

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome AF: 7.00e-7 AC: 1 AN: 1428196 Hom.: 0 Cov.: 31 AF XY: 0.00000141 AC XY: 1 AN XY: 707652

⚠️ The allele balance in gnomAD version 4 Exomes is significantly skewed from the expected value of 0.5.

African (AFR) AF: 0.00 AC: 0 AN: 32224

American (AMR) AF: 0.0000249 AC: 1 AN: 40128

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 25286

East Asian (EAS) AF: 0.00 AC: 0 AN: 37224

South Asian (SAS) AF: 0.00 AC: 0 AN: 82030

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 51088

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5688

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1095600

Other (OTH) AF: 0.00 AC: 0 AN: 58928

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0), which strongly suggests a high chance of mosaicism in these individuals.

GnomAD4 genome Cov.: 33

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.53
CADD	Benign	11
DANN	Benign	0.71
PhyloP100		-1.4
PromoterAI		0.11	Neutral
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		2.7

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: rs150115898; hg19: chr13-37574951;