18-63410435-C-T

Position:

• chr18-63410435-C-T

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The ENST00000238497.10(VPS4B):​c.151G>A​(p.Gly51Ser) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. 13/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 0.0 (0 hom.)
  • Failed GnomAD Quality Control
• Consequence: VPS4B ENST00000238497.10 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 1.35

Genes affected

VPS4B (HGNC:10895): (vacuolar protein sorting 4 homolog B) The protein encoded by this gene is a member of the AAA protein family (ATPases associated with diverse cellular activities), and is the homolog of the yeast Vps4 protein. In humans, two paralogs of the yeast protein have been identified. The former share a high degree of aa sequence similarity with each other, and also with yeast Vps4 and mouse Skd1 proteins. Mouse Skd1 (suppressor of K+ transport defect 1) has been shown to be a yeast Vps4 ortholog. Functional studies indicate that both human paralogs associate with the endosomal compartments, and are involved in intracellular protein trafficking, similar to Vps4 protein in yeast. The gene encoding this paralog has been mapped to chromosome 18; the gene for the other resides on chromosome 16. [provided by RefSeq, Jul 2008]

VPS4B (HGNC:):

ACMG classification

Verdict is Uncertain_significance. Variant got 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.095057845).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
VPS4B	NM_004869.4	c.151G>A	p.Gly51Ser	missense_variant	3/11	ENST00000238497.10	NP_004860.2
VPS4B	XM_047437949.1	c.-136G>A		upstream_gene_variant			XP_047293905.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
VPS4B	ENST00000238497.10	c.151G>A	p.Gly51Ser	missense_variant	3/11	1	NM_004869.4	ENSP00000238497.4

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Data not reliable, filtered out with message: AC0 AF: 0.00 AC: 0 AN: 1460552 Hom.: 0 Cov.: 31 AF XY: 0.00 AC XY: 0 AN XY: 726616

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 33

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Jun 06, 2023

The c.151G>A (p.G51S) alteration is located in exon 3 (coding exon 3) of the VPS4B gene. This alteration results from a G to A substitution at nucleotide position 151, causing the glycine (G) at amino acid position 51 to be replaced by a serine (S). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.13
BayesDel_addAF	Benign	-0.27	T
BayesDel_noAF	Benign	-0.63
CADD	Benign	21
DANN	Uncertain	0.98
DEOGEN2	Benign	0.074	T;.
Eigen	Benign	-0.36
Eigen_PC	Benign	-0.13
FATHMM_MKL	Uncertain	0.91	D
LIST_S2	Uncertain	0.88	D;D
M_CAP	Benign	0.011	T
MetaRNN	Benign	0.095	T;T
MetaSVM	Benign	-1.1	T
MutationAssessor	Benign	-0.060	N;.
MutationTaster	Benign	1.0	D;D
PrimateAI	Uncertain	0.74	T
PROVEAN	Benign	0.55	N;.
REVEL	Benign	0.065
Sift	Benign	0.24	T;.
Sift4G	Benign	0.36	T;T
Polyphen		0.0070	B;.
Vest4		0.17
MutPred		0.37		Loss of ubiquitination at K53 (P = 0.0795);Loss of ubiquitination at K53 (P = 0.0795);
MVP		0.34
MPC		0.90
ClinPred		0.60	D
GERP RS		4.1
Varity_R		0.39
gMVP		0.33

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: rs1916014461; hg19: chr18-61077668;