VPS13B p.Trp1641Cys

Variant names:

• chr8-99556552-G-T
• rs180177360
• NM_017890.5:c.4923G>T
• VPS13B p.Trp1641Cys

Your query was ambiguous. Multiple possible variants found:

• chr8-99556552-G-T
• chr8-99556552-G-C

Variant summary

Our verdict is Uncertain significance. The variant received 4 ACMG points: 4P and 0B. PM2 PP3_Moderate

The NM_017890.5(VPS13B):​c.4923G>T​(p.Trp1641Cys) 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. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another nucleotide change resulting in the same amino acid substitution has been previously reported as Uncertain significance in ClinVar.

• Frequency: Genomes: not found (cov: 32)
• Consequence: VPS13B NM_017890.5 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 9.67
• Publications: 2 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, G2P, Labcorp Genetics (formerly Invitae), Genomics England PanelApp, ClinGen, Laboratory for Molecular Medicine

ACMG classification

Our verdict: Uncertain_significance. The variant received 4 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.868

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

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	VPS13B	NM_017890.5	MANE Plus Clinical	c.4923G>T	p.Trp1641Cys	missense	Exon 31 of 62	NP_060360.3
	VPS13B	NM_152564.5	MANE Select	c.4848G>T	p.Trp1616Cys	missense	Exon 31 of 62	NP_689777.3

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	VPS13B	ENST00000358544.7	TSL:1 MANE Plus Clinical	c.4923G>T	p.Trp1641Cys	missense	Exon 31 of 62	ENSP00000351346.2	Q7Z7G8-1
	VPS13B	ENST00000357162.7	TSL:1 MANE Select	c.4848G>T	p.Trp1616Cys	missense	Exon 31 of 62	ENSP00000349685.2	Q7Z7G8-2
	VPS13B	ENST00000521559.1	TSL:3	c.111-19106G>T		intron	N/A	ENSP00000428809.1	H0YB72

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD2 exomes AF: 0.00 AC: 0 AN: 250582 AF XY: 0.00

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00

Gnomad OTH exome AF: 0.00

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.99
BayesDel_addAF	Pathogenic	0.42	D
BayesDel_noAF	Pathogenic	0.37
CADD	Pathogenic	29
DANN	Uncertain	0.99
DEOGEN2	Uncertain	0.57	D
Eigen	Pathogenic	0.84
Eigen_PC	Pathogenic	0.84
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Uncertain	0.96	D
M_CAP	Uncertain	0.18	D
MetaRNN	Pathogenic	0.87	D
MetaSVM	Uncertain	0.30	D
MutationAssessor	Uncertain	2.6	M
PhyloP100		9.7
PrimateAI	Pathogenic	0.81	D
PROVEAN	Pathogenic	-10	D
REVEL	Pathogenic	0.81
Sift	Pathogenic	0.0	D
Sift4G	Pathogenic	0.0	D
Varity_R		0.90
gMVP		0.91
Mutation Taster		=44/56	disease causing

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

MaxEntScan Visualizer can be used to analyze the impact of this mutation on the neighboring sequence.

Other links and lift over

dbSNP: rs180177360;

hg19: chr8-100568780;