9-77177706-T-A

Variant names:

• chr9-77177706-T-A
• NM_033305.3:c.2T>A

Variant summary

Our verdict is Pathogenic. The variant received 12 ACMG points: 12P and 0B. PVS1 PM2 PP5_Moderate

The NM_033305.3(VPS13A):​c.2T>A​(p.Met1?) variant causes a start lost 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 Likely pathogenic (★).

• Frequency: Genomes: not found (cov: 33)
• Consequence: VPS13A NM_033305.3 start_lost
• Clinical Significance: Likely pathogenic criteria provided, single submitter P:1
• Conservation: PhyloP100: 6.33
• Publications: 0 publications found

Genes affected

VPS13A (HGNC:1908): (vacuolar protein sorting 13 homolog A) The protein encoded by this gene may control steps in the cycling of proteins through the trans-Golgi network to endosomes, lysosomes and the plasma membrane. Mutations in this gene cause the autosomal recessive disorder, chorea-acanthocytosis. Alternative splicing of this gene results in multiple transcript variants. [provided by RefSeq, Jul 2008]

VPS13A-AS1 (HGNC:44167): (VPS13A antisense RNA 1)

ACMG classification

Our verdict: Pathogenic. The variant received 12 ACMG points.

• PVS1: Start lost variant, next in-frame start position is after 17 pathogenic variants. Next in-frame start position is after 108 codons. Genomic position: 77206016. Lost 0.034 part of the original CDS.
• PM2: Very rare variant in population databases, with high coverage
• PP5: Variant 9-77177706-T-A is Pathogenic according to our data. Variant chr9-77177706-T-A is described in ClinVar as [Likely_pathogenic]. Clinvar id is 3597668.Status of the report is criteria_provided_single_submitter, 1 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
VPS13A	NM_033305.3	c.2T>A	p.Met1?	start_lost	Exon 1 of 72	ENST00000360280.8	NP_150648.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
VPS13A	ENST00000360280.8	c.2T>A	p.Met1?	start_lost	Exon 1 of 72	1	NM_033305.3	ENSP00000353422.3

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 33

ClinVar

Significance: Likely pathogenic

Submissions summary: Pathogenic:1

Revision: criteria provided, single submitter

Submissions by phenotype

Chorea-acanthocytosis Pathogenic:1

Mar 21, 2024

Fulgent Genetics, Fulgent Genetics

Significance: Likely pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

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Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Pathogenic	0.63	D
BayesDel_noAF	Uncertain	0.030
CADD	Uncertain	25
DANN	Benign	0.97
DEOGEN2	Uncertain	0.79	.;.;D;.;.;.;D
Eigen	Benign	0.16
Eigen_PC	Benign	0.076
FATHMM_MKL	Uncertain	0.87	D
LIST_S2	Uncertain	0.90	.;D;.;.;D;D;D
M_CAP	Pathogenic	0.85	D
MetaRNN	Pathogenic	0.99	D;D;D;D;D;D;D
MetaSVM	Benign	-0.33	T
PhyloP100		6.3
PROVEAN	Uncertain	-4.1	D;D;D;D;.;.;.
REVEL	Uncertain	0.54
Sift	Pathogenic	0.0	D;D;D;D;.;.;.
Sift4G	Pathogenic	0.0	D;D;D;D;.;.;.
Polyphen		1.0	D;D;D;D;D;D;D
Vest4		0.91
MutPred		0.99		Loss of stability (P = 0.0071);Loss of stability (P = 0.0071);Loss of stability (P = 0.0071);Loss of stability (P = 0.0071);Loss of stability (P = 0.0071);Loss of stability (P = 0.0071);Loss of stability (P = 0.0071);
MVP		0.76
ClinPred		1.0	D
GERP RS		3.8
PromoterAI		-0.12	Neutral
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.97
gMVP		0.97
Mutation Taster		=9/191	disease causing

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.020		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

hg19: chr9-79792622;