NM_020821.3:c.8445+2T>G

Variant names:

• chr15-61915631-A-C
• rs869312809
• NM_020821.3:c.8445+2T>G

Variant summary

Our verdict is Likely pathogenic. The variant received 6 ACMG points: 6P and 0B. PVS1_Moderate PM2 PP5_Moderate

The NM_020821.3(VPS13C):​c.8445+2T>G variant causes a splice donor, intron 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. 3/3 splice prediction tools predicting alterations to normal splicing. Variant has been reported in ClinVar as Pathogenic (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: VPS13C NM_020821.3 splice_donor, intron
• Scores: Splicing: ADA: 1.000
• Clinical Significance: Pathogenic criteria provided, single submitter P:2
• Conservation: PhyloP100: 8.87
• Publications: 3 publications found

Genes affected

VPS13C (HGNC:23594): (vacuolar protein sorting 13 homolog C) Involved in mitochondrion organization and negative regulation of parkin-mediated stimulation of mitophagy in response to mitochondrial depolarization. Located in cytosol and mitochondrial outer membrane. Implicated in Parkinson's disease 23. [provided by Alliance of Genome Resources, Apr 2022]

VPS13C Gene-Disease associations (from GenCC):

• autosomal recessive early-onset Parkinson disease 23

  Inheritance: AR Classification: STRONG, MODERATE Submitted by: Genomics England PanelApp, Labcorp Genetics (formerly Invitae)
• young-onset Parkinson disease

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
• schizophrenia

  Inheritance: Unknown Classification: NO_KNOWN Submitted by: Labcorp Genetics (formerly Invitae)

ENSG00000259564 (HGNC:):

ACMG classification

Our verdict: Likely_pathogenic. The variant received 6 ACMG points.

• PVS1: Splicing +-2 bp (donor or acceptor) variant, product NOT destroyed by NMD, known LOF gene, truncates exone, which is 0.03462973 fraction of the gene. No cryptic splice site detected. Exon removal is inframe change.
• PM2: Very rare variant in population databases, with high coverage
• PP5: Variant 15-61915631-A-C is Pathogenic according to our data. Variant chr15-61915631-A-C is described in ClinVar as Pathogenic. ClinVar VariationId is 222067.Status of the report is criteria_provided_single_submitter, 1 stars.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_020821.3. 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
	VPS13C	NM_020821.3	MANE Select	c.8445+2T>G		splice_donor intron	N/A	NP_065872.1	Q709C8-1
	VPS13C	NM_017684.5		c.8316+2T>G		splice_donor intron	N/A	NP_060154.3
	VPS13C	NM_001018088.3		c.8445+2T>G		splice_donor intron	N/A	NP_001018098.1	Q709C8-2

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	VPS13C	ENST00000644861.2	MANE Select	c.8445+2T>G		splice_donor intron	N/A	ENSP00000493560.2	Q709C8-1
	VPS13C	ENST00000249837.7	TSL:1	c.8316+2T>G		splice_donor intron	N/A	ENSP00000249837.3	Q709C8-3
	VPS13C	ENST00000395898.3	TSL:1	c.8316+2T>G		splice_donor intron	N/A	ENSP00000379235.3	Q709C8-4

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 30

GnomAD4 genome Cov.: 32

Alfa AF: 0.00 Hom.: 0

ClinVar

ClinVar submissions

Significance: Pathogenic

Revision: criteria provided, single submitter

Pathogenic	VUS	Benign	Condition
1	-	-	Autosomal recessive early-onset Parkinson disease 23 (1)
1	-	-	Parkinson disease (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Pathogenic	0.63	D
BayesDel_noAF	Pathogenic	0.18
CADD	Pathogenic	27
DANN	Uncertain	0.99
Eigen	Pathogenic	1.1
Eigen_PC	Pathogenic	0.98
FATHMM_MKL	Pathogenic	0.99	D
PhyloP100		8.9
GERP RS		5.5
Mutation Taster		=0/100	disease causing (ClinVar)

Splicing

Name	Calibrated prediction	Score	Prediction
dbscSNV1_ADA	Pathogenic	1.0
dbscSNV1_RF	Pathogenic	0.95
SpliceAI score (max)		0.97		Details are displayed if max score is > 0.2
DS_DL_spliceai		0.97		Position offset: 2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Other links and lift over

dbSNP: rs869312809; hg19: chr15-62207830;