dbSNP rs765167095: VPS33A:p.Pro539Pro (chr12-122232420-C-G) – ACMG Classification: Likely_benign (-3 pts)

Variant summary

Our verdict is Likely benign. The variant received -3 ACMG points: 2P and 5B. PM2BP4_StrongBP7

The NM_022916.6(VPS33A):c.1617G>C(p.Pro539Pro) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000686 in 1,458,054 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Synonymous variant affecting the same amino acid position (i.e. P539P) has been classified as Likely benign.

Frequency

Genomes: not found (cov: 33)

Exomes 𝑓: 6.9e-7 ( 0 hom. )

Consequence

VPS33A
NM_022916.6 synonymous

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: -2.74

Publications

0 publications found

Variant links:

Genes affected

VPS33A (HGNC:18179): (VPS33A core subunit of CORVET and HOPS complexes) This gene encodes a tethering protein and a core subunit of the homotypic fusion and protein sorting (HOPS) complex. The HOPS complex and a second endosomal tethering complex called the class C core vacuole/endosome tethering (CORVET) complex, perform diverse functions in endocytosis including membrane tethering, RabGTPase interaction, activation and proofreading of synaptic-soluble N-ethylmaleimide-sensitive factor attachment receptor (SNARE) assembly to drive membrane fusion, and endosome-to-cytoskeleton attachment. The HOPS complex controls endosome maturation as well as endosome traffic to the lysosome. This complex is essential for vacuolar fusion and is required for adaptor protein complex 3-dependent transport from the golgi to the vacuole. The encoded protein belongs to the Sec1/Munc18 (SM) family of SNARE-mediated membrane fusion regulators. Naturally occurring mutations in this gene are associated with a novel mucopolysaccharidosis-like disease. [provided by RefSeq, Apr 2017]

VPS33A Gene-Disease associations (from GenCC):

mucopolysaccharidosis-plus syndrome
Inheritance: AR Classification: STRONG, MODERATE, LIMITED Submitted by: Ambry Genetics, Genomics England PanelApp, Labcorp Genetics (formerly Invitae), ClinGen

VPS33A links:

ENSG00000256861 (HGNC:):

ENSG00000256861 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -3 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.65).

BP7

Synonymous conserved (PhyloP=-2.74 with no splicing effect.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_022916.6. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein
VPS33A	NM_022916.6	MANE Select	c.1617G>C	p.Pro539Pro	synonymous	Exon 13 of 13	NP_075067.2
VPS33A	NM_001351018.2		c.1584G>C	p.Pro528Pro	synonymous	Exon 13 of 13	NP_001337947.1
VPS33A	NM_001351019.2		c.1569G>C	p.Pro523Pro	synonymous	Exon 13 of 13	NP_001337948.1

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
VPS33A	ENST00000267199.9	TSL:1 MANE Select	c.1617G>C	p.Pro539Pro	synonymous	Exon 13 of 13	ENSP00000267199.3	Q96AX1
ENSG00000256861	ENST00000535844.1	TSL:2	n.1500G>C		non_coding_transcript_exon	Exon 12 of 16	ENSP00000454454.1	H3BMM5
VPS33A	ENST00000536212.3	TSL:4	c.1764G>C	p.Pro588Pro	synonymous	Exon 14 of 14	ENSP00000439255.3	F5H2X5

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

6.86e-7

AC:

AN:

1458054

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

725134

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33282

American (AMR)

AF:

0.00

AC:

AN:

43716

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

25984

East Asian (EAS)

AF:

0.00

AC:

AN:

39670

South Asian (SAS)

AF:

0.00

AC:

AN:

85240

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53380

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5756

European-Non Finnish (NFE)

AF:

9.00e-7

AC:

AN:

1110768

Other (OTH)

AF:

0.00

AC:

AN:

60258

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.425

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 v4.9

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.65

CADD

Benign

0.18

(source)

DANN

Benign

0.80

PhyloP100

-2.7

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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over