chr8-99038494-AC-T

Variant names:

• chr8-99038494-AC-T
• rs386834075
• NM_017890.5:c.219_220delACinsT

Variant summary

Our verdict is Pathogenic. The variant received 11 ACMG points: 11P and 0B. PVS1 PM2 PP5

The NM_017890.5(VPS13B):​c.219_220delACinsT​(p.Lys73AsnfsTer8) variant causes a frameshift, missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Likely pathogenic (no stars). Synonymous variant affecting the same amino acid position (i.e. K73K) has been classified as Likely benign. Variant results in nonsense mediated mRNA decay.

• Frequency: Genomes: not found (cov: 32)
• Consequence: VPS13B NM_017890.5 frameshift, missense
• Clinical Significance: Likely pathogenic no assertion criteria provided P:1
• Conservation: PhyloP100: 3.19
• Publications: 0 publications found

Genes affected

VPS13B (HGNC:2183): (vacuolar protein sorting 13 homolog B) This gene encodes a potential transmembrane protein that may function in vesicle-mediated transport and sorting of proteins within the cell. This protein may play a role in the development and the function of the eye, hematological system, and central nervous system. Mutations in this gene have been associated with Cohen syndrome. Multiple splice variants encoding distinct isoforms have been identified for this gene. [provided by RefSeq, Jul 2008]

VPS13B Gene-Disease associations (from GenCC):

• Cohen syndrome

  Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Orphanet, Myriad Women’s Health, Labcorp Genetics (formerly Invitae), G2P, Genomics England PanelApp, Laboratory for Molecular Medicine, ClinGen

ACMG classification

Our verdict: Pathogenic. The variant received 11 ACMG points.

• PVS1: Loss of function variant, product undergoes nonsense mediated mRNA decay. LoF is a known mechanism of disease.
• PM2: Very rare variant in population databases, with high coverage
• PP5: Variant 8-99038494-AC-T is Pathogenic according to our data. Variant chr8-99038494-AC-T is described in ClinVar as Likely_pathogenic. ClinVar VariationId is 56651.Status of the report is no_assertion_criteria_provided, 0 stars.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_017890.5. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	VPS13B	NM_017890.5	MANE Plus Clinical	c.219_220delACinsT	p.Lys73AsnfsTer8	frameshift missense	Exon 3 of 62	NP_060360.3
	VPS13B	NM_152564.5	MANE Select	c.219_220delACinsT	p.Lys73AsnfsTer8	frameshift missense	Exon 3 of 62	NP_689777.3
	VPS13B	NM_015243.3		c.219_220delACinsT	p.Lys73AsnfsTer8	frameshift missense	Exon 3 of 18	NP_056058.2

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	VPS13B	ENST00000358544.7	TSL:1 MANE Plus Clinical	c.219_220delACinsT	p.Lys73AsnfsTer8	frameshift missense	Exon 3 of 62	ENSP00000351346.2
	VPS13B	ENST00000357162.7	TSL:1 MANE Select	c.219_220delACinsT	p.Lys73AsnfsTer8	frameshift missense	Exon 3 of 62	ENSP00000349685.2
	VPS13B	ENST00000441350.2	TSL:1	c.219_220delACinsT	p.Lys73AsnfsTer8	frameshift missense	Exon 3 of 8	ENSP00000398472.2

Frequencies

GnomAD3 genomes Cov.: 32

We have no GnomAD4 exomes data on this position. Probably position not covered by the project.

GnomAD4 genome Cov.: 32

ClinVar

Significance: Likely pathogenic

Submissions summary: Pathogenic:1

Revision: no assertion criteria provided

Submissions by phenotype

Cohen syndrome Pathogenic:1

Juha Muilu Group; Institute for Molecular Medicine Finland (FIMM)

Significance: Likely pathogenic

Review Status: no assertion criteria provided

Collection Method: literature only

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
PhyloP100		3.2
Mutation Taster		=0/200	disease causing (fs/PTC)

Splicing

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

Other links and lift over

dbSNP: rs386834075; hg19: chr8-100050722;