rs144659538

Positions:

• chr1-150077221-A-G

Variant summary

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

The NM_007259.5(VPS45):​c.566A>G​(p.Glu189Gly) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.000666 in 1,613,682 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★).

• Frequency:
  • Genomes: 𝑓 0.00060 (0 hom., cov: 31)
  • Exomes 𝑓: 0.00067 (0 hom.)
• Consequence: VPS45 NM_007259.5 missense
• Clinical Significance: Uncertain significance criteria provided, multiple submitters, no conflicts U:5
• Conservation: PhyloP100: 9.06

Genes affected

VPS45 (HGNC:14579): (vacuolar protein sorting 45 homolog) Vesicle mediated protein sorting plays an important role in segregation of intracellular molecules into distinct organelles. Genetic studies in yeast have identified more than 40 vacuolar protein sorting (VPS) genes involved in vesicle transport to vacuoles. This gene is a member of the Sec1 domain family, and shows a high degree of sequence similarity to mouse, rat and yeast Vps45. The exact function of this gene is not known, but its high expression in peripheral blood mononuclear cells suggests a role in trafficking proteins, including inflammatory mediators. Multiple alternatively spliced transcript variants have been found for this gene. [provided by RefSeq, Jul 2013]

ACMG classification

Verdict is Uncertain_significance. Variant got 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
VPS45	NM_007259.5	c.566A>G	p.Glu189Gly	missense_variant	6/15	ENST00000644510.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
VPS45	ENST00000644510.2	c.566A>G	p.Glu189Gly	missense_variant	6/15		NM_007259.5	P3

Frequencies

GnomAD3 genomes AF: 0.000604 AC: 92 AN: 152194 Hom.: 0 Cov.: 31

Gnomad AFR AF: 0.0000724

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.000131

Gnomad ASJ AF: 0.000864

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.0000943

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.00121

Gnomad OTH AF: 0.000478

GnomAD3 exomes AF: 0.000549 AC: 137 AN: 249710 Hom.: 0 AF XY: 0.000630 AC XY: 85 AN XY: 134954

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.000410

Gnomad ASJ exome AF: 0.000800

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.0000662

Gnomad FIN exome AF: 0.0000463

Gnomad NFE exome AF: 0.000955

Gnomad OTH exome AF: 0.000657

GnomAD4 exome AF: 0.000672 AC: 982 AN: 1461370 Hom.: 0 Cov.: 31 AF XY: 0.000675 AC XY: 491 AN XY: 726982

Gnomad4 AFR exome AF: 0.0000299

Gnomad4 AMR exome AF: 0.000381

Gnomad4 ASJ exome AF: 0.00107

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.0000348

Gnomad4 FIN exome AF: 0.0000187

Gnomad4 NFE exome AF: 0.000797

Gnomad4 OTH exome AF: 0.000696

GnomAD4 genome AF: 0.000604 AC: 92 AN: 152312 Hom.: 0 Cov.: 31 AF XY: 0.000510 AC XY: 38 AN XY: 74472

Gnomad4 AFR AF: 0.0000722

Gnomad4 AMR AF: 0.000131

Gnomad4 ASJ AF: 0.000864

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.00

Gnomad4 FIN AF: 0.0000943

Gnomad4 NFE AF: 0.00121

Gnomad4 OTH AF: 0.000473

Alfa AF: 0.000797 Hom.: 1

Bravo AF: 0.000616

TwinsUK AF: 0.00162 AC: 6

ALSPAC AF: 0.00104 AC: 4

ESP6500AA AF: 0.00 AC: 0

ESP6500EA AF: 0.00116 AC: 10

ExAC AF: 0.000560 AC: 68

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:5

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

Congenital neutropenia-myelofibrosis-nephromegaly syndrome Uncertain:4

Uncertain significance, criteria provided, single submitter	clinical testing	Center for Genomics, Ann and Robert H. Lurie Children's Hospital of Chicago	May 12, 2021	VPS45 NM_007259.4 exon 6 p.Glu189Gly (c.566A>G): This variant has not been reported in the literature but is present in 0.1% (82/68028) of European alleles in the Genome Aggregation Database (https://gnomad.broadinstitute.org/variant/1-150077221-A-G?dataset=gnomad_r3). This variant is present in ClinVar (Variation ID:541273). Evolutionary conservation suggests that this variant may impact the protein; computational predictive tools for this variant are unclear. Of note, although this variant occurs in the exon, splice prediction tools suggest that this variant may affect splicing. However, further studies are needed to understand its impact. In summary, data on this variant is insufficient for disease classification. Therefore, the clinical significance of this variant is uncertain. -
Uncertain significance, criteria provided, single submitter	clinical testing	Baylor Genetics	Oct 23, 2020	This variant was determined to be of uncertain significance according to ACMG Guidelines, 2015 [PMID:25741868]. -
Uncertain significance, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Oct 13, 2022	This sequence change replaces glutamic acid, which is acidic and polar, with glycine, which is neutral and non-polar, at codon 189 of the VPS45 protein (p.Glu189Gly). This variant is present in population databases (rs144659538, gnomAD 0.1%), and has an allele count higher than expected for a pathogenic variant. This variant has not been reported in the literature in individuals affected with VPS45-related conditions. ClinVar contains an entry for this variant (Variation ID: 541273). Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) performed at Invitae indicates that this missense variant is not expected to disrupt VPS45 protein function. Algorithms developed to predict the effect of sequence changes on RNA splicing suggest that this variant may create or strengthen a splice site. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -
Uncertain significance, no assertion criteria provided	clinical testing	Natera, Inc.	Jun 25, 2020	- -

not provided Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Mayo Clinic Laboratories, Mayo Clinic

Jan 11, 2023

BS1_stand-alone -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Uncertain	0.43
BayesDel_addAF	Uncertain	0.067	T
BayesDel_noAF	Pathogenic	0.30
CADD	Pathogenic	28
DANN	Uncertain	1.0
DEOGEN2	Uncertain	0.57	.;D;.;D;.;.
Eigen	Uncertain	0.55
Eigen_PC	Uncertain	0.62
FATHMM_MKL	Uncertain	0.96	D
LIST_S2	Uncertain	0.95	D;.;D;D;D;D
M_CAP	Benign	0.079	D
MetaRNN	Benign	0.28	T;T;T;T;T;T
MetaSVM	Uncertain	-0.046	T
MutationAssessor	Uncertain	2.2	.;M;.;M;.;.
MutationTaster	Benign	1.0	D;D;D
PrimateAI	Uncertain	0.59	T
PROVEAN	Uncertain	-4.0	.;D;.;.;.;.
REVEL	Pathogenic	0.68
Sift	Benign	0.12	.;T;.;.;.;.
Sift4G	Benign	0.079	.;T;T;.;.;.
Polyphen		0.45	.;B;.;B;.;.
Vest4		0.86, 0.86
MVP		0.78
MPC		1.1
ClinPred		0.13	T
GERP RS		6.1
Varity_R		0.25
gMVP		0.54

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.22		Details are displayed if max score is > 0.2
DS_DG_spliceai		0.22		Position offset: 0

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

Publications

LitVar

Other links and lift over

dbSNP: rs144659538; hg19: chr1-150049299;