chr8-99871657-CAGTG-AA

Variant names:

• chr8-99871657-CAGTG-AA
• rs386834067
• NM_017890.5:c.11780_11784delCAGTGinsAA

Variant summary

Our verdict is Uncertain significance. The variant received 4 ACMG points: 4P and 0B. PM2 PM4_Supporting PP5

The NM_017890.5(VPS13B):​c.11780_11784delCAGTGinsAA​(p.Thr3927_Val3928delinsLys) variant causes a missense, conservative inframe deletion 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. T3927T) has been classified as Likely benign.

• Frequency: Genomes: not found (cov: 33)
• Consequence: VPS13B NM_017890.5 missense, conservative_inframe_deletion
• Clinical Significance: Likely pathogenic no assertion criteria provided P:1
• Conservation: PhyloP100: 3.30
• Publications: 1 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: Uncertain_significance. The variant received 4 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PM4: Nonframeshift variant in NON repetitive region in NM_017890.5. Strenght limited to Supporting due to length of the change: 1aa.
• PP5: Variant 8-99871657-CAGTG-AA is Pathogenic according to our data. Variant chr8-99871657-CAGTG-AA is described in ClinVar as Likely_pathogenic. ClinVar VariationId is 56641.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.11780_11784delCAGTGinsAA	p.Thr3927_Val3928delinsLys	missense conservative_inframe_deletion	N/A	NP_060360.3
	VPS13B	NM_152564.5	MANE Select	c.11705_11709delCAGTGinsAA	p.Thr3902_Val3903delinsLys	missense conservative_inframe_deletion	N/A	NP_689777.3

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	VPS13B	ENST00000358544.7	TSL:1 MANE Plus Clinical	c.11780_11784delCAGTGinsAA	p.Thr3927_Val3928delinsLys	missense conservative_inframe_deletion	N/A	ENSP00000351346.2
	VPS13B	ENST00000357162.7	TSL:1 MANE Select	c.11705_11709delCAGTGinsAA	p.Thr3902_Val3903delinsLys	missense conservative_inframe_deletion	N/A	ENSP00000349685.2
	VPS13B	ENST00000493587.1	TSL:2	n.1282_1286delCAGTGinsAA		non_coding_transcript_exon	Exon 2 of 3

Frequencies

GnomAD3 genomes Cov.: 33

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

GnomAD4 genome Cov.: 33

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		3.3

Splicing

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

Other links and lift over

dbSNP: rs386834067; hg19: chr8-100883885;