chr8-99784394-G-A

Position:

• chr8-99784394-G-A

Variant summary

Our verdict is Likely pathogenic. Variant got 7 ACMG points: 7P and 0B. PM2 PP3_Strong PP5

The NM_017890.5(VPS13B):​c.7934G>A​(p.Gly2645Asp) variant causes a missense 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. Variant has been reported in ClinVar as Likely pathogenic (no stars). Synonymous variant affecting the same amino acid position (i.e. G2645G) has been classified as Likely benign.

• Frequency: Genomes: not found (cov: 32)
• Consequence: VPS13B NM_017890.5 missense
• Clinical Significance: Pathogenic/Likely pathogenic no assertion criteria provided P:2
• Conservation: PhyloP100: 9.60

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]

ACMG classification

Verdict is Likely_pathogenic. Variant got 7 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.962
• PP5: Variant 8-99784394-G-A is Pathogenic according to our data. Variant chr8-99784394-G-A is described in ClinVar as [Likely_pathogenic]. Clinvar id is 2824.Status of the report is no_assertion_criteria_provided, 0 stars. Variant chr8-99784394-G-A is described in Lovd as [Likely_pathogenic].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
VPS13B	NM_017890.5	c.7934G>A	p.Gly2645Asp	missense_variant	43/62	ENST00000358544.7
VPS13B	NM_152564.5	c.7859G>A	p.Gly2620Asp	missense_variant	43/62	ENST00000357162.7

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
VPS13B	ENST00000358544.7	c.7934G>A	p.Gly2645Asp	missense_variant	43/62	1	NM_017890.5
VPS13B	ENST00000357162.7	c.7859G>A	p.Gly2620Asp	missense_variant	43/62	1	NM_152564.5	P1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

Bravo AF: 0.00000378

ClinVar

Significance: Pathogenic/Likely pathogenic

Submissions summary: Pathogenic:2

Revision: no assertion criteria provided

Submissions by phenotype

Cohen syndrome Pathogenic:2

Likely pathogenic, no assertion criteria provided	curation	Department Of Genetics, Sultan Qaboos University Hospital, Sultan Qaboos University	Jun 12, 2024	- -
Pathogenic, no assertion criteria provided	literature only	OMIM	Jul 01, 2004	- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	1.0
BayesDel_addAF	Pathogenic	0.55	D
BayesDel_noAF	Pathogenic	0.55
CADD	Pathogenic	27
DANN	Uncertain	1.0
DEOGEN2	Uncertain	0.43	.;T
Eigen	Pathogenic	0.89
Eigen_PC	Pathogenic	0.88
FATHMM_MKL	Uncertain	0.96	D
LIST_S2	Uncertain	0.94	D;D
M_CAP	Uncertain	0.26	D
MetaRNN	Pathogenic	0.96	D;D
MetaSVM	Pathogenic	1.1	D
MutationAssessor	Benign	2.0	.;M
MutationTaster	Benign	1.0	A;A;A
PrimateAI	Pathogenic	0.90	D
PROVEAN	Pathogenic	-6.1	D;D
REVEL	Pathogenic	0.93
Sift	Pathogenic	0.0	D;D
Sift4G	Pathogenic	0.0	D;D
Polyphen		1.0	D;D
Vest4		0.97
MutPred		0.85		.;Loss of helix (P = 0.0558);
MVP		0.97
MPC		0.65
ClinPred		1.0	D
GERP RS		5.5
Varity_R		0.95
gMVP		0.84

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.0		Details are displayed if max score is > 0.2

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

Publications

LitVar

Other links and lift over

dbSNP: rs120074153; hg19: chr8-100796622;