Genetic Variant NM_001128159.3:c.2062A>T (chr17-532865-T-A) – ACMG Classification: Uncertain_significance (2 pts)

Variant summary

Our verdict is Uncertain significance. The variant received 2 ACMG points: 2P and 0B. PM2

The NM_001128159.3(VPS53):c.2062A>T(p.Ile688Phe) variant causes a missense change. The variant allele was found at a frequency of 0.000000684 in 1,461,794 control chromosomes in the GnomAD database, with no homozygous occurrence. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. I688V) has been classified as Likely benign.

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 6.8e-7 ( 0 hom. )

Consequence

VPS53
NM_001128159.3 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 3.90

Publications

0 publications found

Variant links:

Genes affected

VPS53 (HGNC:25608): (VPS53 subunit of GARP complex) Involved in endocytic recycling and retrograde transport, endosome to Golgi. Acts upstream of or within lysosomal transport. Located in several cellular components, including Golgi apparatus; perinuclear region of cytoplasm; and recycling endosome. Part of EARP complex and GARP complex. Implicated in pontocerebellar hypoplasia type 2E. [provided by Alliance of Genome Resources, Apr 2022]

VPS53 Gene-Disease associations (from GenCC):

pontocerebellar hypoplasia type 2E
Inheritance: AR Classification: STRONG Submitted by: PanelApp Australia
pontocerebellar hypoplasia, type 13
Inheritance: AR Classification: STRONG Submitted by: Labcorp Genetics (formerly Invitae)
progressive cerebello-cerebral atrophy
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

VPS53 links:

ENSG00000263300 (HGNC:58554):

ENSG00000263300 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
VPS53	NM_001128159.3 link	c.2062A>T	p.Ile688Phe	missense_variant	Exon 19 of 22	ENST00000437048.7	NP_001121631.1	Q5VIR6-4B3KS06

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
VPS53	ENST00000437048.7 link	c.2062A>T	p.Ile688Phe	missense_variant	Exon 19 of 22	1	NM_001128159.3	ENSP00000401435.2		Q5VIR6-4

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

6.84e-7

AC:

AN:

1461794

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

727174

show subpopulations

⚠️ The allele balance in gnomAD version 4 Exomes is significantly skewed from the expected value of 0.5.

African (AFR)

AF:

0.00

AC:

AN:

33478

American (AMR)

AF:

0.00

AC:

AN:

44708

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26130

East Asian (EAS)

AF:

0.00

AC:

AN:

39700

South Asian (SAS)

AF:

0.00

AC:

AN:

86226

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53416

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

8.99e-7

AC:

AN:

1111974

Other (OTH)

AF:

0.00

AC:

AN:

60394

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0.000000), which strongly suggests a high chance of mosaicism in these individuals.

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.225

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

Cov.:

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.79

BayesDel_addAF

Pathogenic

0.22

BayesDel_noAF

Uncertain

0.080

CADD

Uncertain

(source)

DANN

Uncertain

0.99

DEOGEN2

Uncertain

0.61

.;.;D;.

Eigen

Uncertain

0.49

Eigen_PC

Uncertain

0.49

FATHMM_MKL

Pathogenic

0.97

M_CAP

Benign

0.042

MetaRNN

Uncertain

0.71

D;D;D;D

MetaSVM

Benign

-0.52

MutationAssessor

Uncertain

2.1

M;.;M;.

PhyloP100

3.9

PrimateAI

Uncertain

0.67

PROVEAN

Uncertain

-3.2

D;D;.;D

REVEL

Benign

0.24

Sift

Uncertain

0.012

D;D;.;D

Sift4G

Uncertain

0.0080

D;D;D;D

Polyphen

0.92

P;P;P;D

Vest4

0.87

MutPred

0.49

Gain of catalytic residue at I688 (P = 0.1387);.;Gain of catalytic residue at I688 (P = 0.1387);.;

MVP

0.47

MPC

1.1

ClinPred

0.97

GERP RS

5.1

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.20

gMVP

0.72

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.040

Details are displayed if max score is > 0.2

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

Publications

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over