chr8-99013810-CC-A

Variant names:

• chr8-99013810-CC-A
• rs386834076
• NM_017890.5:c.22_23delCCinsA

Variant summary

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

The NM_152564.5(VPS13B):​c.22_23delCCinsA​(p.Pro8LysfsTer3) variant causes a frameshift, missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Likely pathogenic (no stars). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. P8A) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 32)
• Consequence: VPS13B NM_152564.5 frameshift, missense
• Clinical Significance: Likely pathogenic no assertion criteria provided P:1
• Conservation: PhyloP100: 7.59
• 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-DT (HGNC:54375): (VPS13B divergent transcript)

ACMG classification

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

• PVS1: Loss of function variant, product does not undergo nonsense mediated mRNA decay. Variant located near the start codon (<100nt), not predicted to undergo nonsense mediated mRNA decay. There are 751 pathogenic variants in the truncated region.
• PM2: Very rare variant in population databases, with high coverage
• PP5: Variant 8-99013810-CC-A is Pathogenic according to our data. Variant chr8-99013810-CC-A is described in ClinVar as [Likely_pathogenic]. Clinvar id is 56652.Status of the report is no_assertion_criteria_provided, 0 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
VPS13B	NM_017890.5	c.22_23delCCinsA	p.Pro8LysfsTer3	frameshift_variant, missense_variant	Exon 2 of 62	ENST00000358544.7	NP_060360.3
VPS13B	NM_152564.5	c.22_23delCCinsA	p.Pro8LysfsTer3	frameshift_variant, missense_variant	Exon 2 of 62	ENST00000357162.7	NP_689777.3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
VPS13B	ENST00000358544.7	c.22_23delCCinsA	p.Pro8LysfsTer3	frameshift_variant, missense_variant	Exon 2 of 62	1	NM_017890.5	ENSP00000351346.2
VPS13B	ENST00000357162.7	c.22_23delCCinsA	p.Pro8LysfsTer3	frameshift_variant, missense_variant	Exon 2 of 62	1	NM_152564.5	ENSP00000349685.2

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

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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 v4.3

Name	Calibrated prediction	Score	Prediction
PhyloP100		7.6
Mutation Taster		=1/199	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: rs386834076; hg19: chr8-100026038;