chr12-122232361-G-A
Variant summary
Our verdict is Uncertain significance. Variant got 4 ACMG points: 4P and 0B. PM2PP3_Moderate
The NM_022916.6(VPS33A):c.1676C>T(p.Ala559Val) 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. Variant has been reported in ClinVar as Uncertain significance (★).
Frequency
Genomes: not found (cov: 32)
Consequence
VPS33A
NM_022916.6 missense
NM_022916.6 missense
Scores
8
9
2
Clinical Significance
Conservation
PhyloP100: 9.88
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]
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ACMG classification
Classification made for transcript
Verdict is Uncertain_significance. Variant got 4 ACMG points.
PM2
?
Very rare variant in population databases, with high coverage;
PP3
?
MetaRNN computational evidence supports a deleterious effect, 0.895
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | UniProt |
---|---|---|---|---|---|---|---|
VPS33A | NM_022916.6 | c.1676C>T | p.Ala559Val | missense_variant | 13/13 | ENST00000267199.9 | |
VPS33A | NM_001351018.2 | c.1643C>T | p.Ala548Val | missense_variant | 13/13 | ||
VPS33A | NM_001351019.2 | c.1628C>T | p.Ala543Val | missense_variant | 13/13 | ||
VPS33A | NM_001351020.2 | c.1355C>T | p.Ala452Val | missense_variant | 11/11 |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|
VPS33A | ENST00000267199.9 | c.1676C>T | p.Ala559Val | missense_variant | 13/13 | 1 | NM_022916.6 | P1 | |
VPS33A | ENST00000643696.1 | c.1799C>T | p.Ala600Val | missense_variant | 14/14 | ||||
VPS33A | ENST00000543633.5 | c.*1637C>T | 3_prime_UTR_variant, NMD_transcript_variant | 14/14 | 5 | ||||
VPS33A | ENST00000544349.6 | c.*1655C>T | 3_prime_UTR_variant, NMD_transcript_variant | 14/14 | 2 |
Frequencies
GnomAD3 genomes ? Cov.: 32
GnomAD3 genomes
?
Cov.:
32
GnomAD4 exome Cov.: 31
GnomAD4 exome
Cov.:
31
GnomAD4 genome ? Cov.: 32
GnomAD4 genome
?
Cov.:
32
ClinVar
Significance: Uncertain significance
Submissions summary: Uncertain:1
Revision: criteria provided, single submitter
LINK: link
Submissions by phenotype
not provided Uncertain:1
Uncertain significance, criteria provided, single submitter | clinical testing | Invitae | Aug 19, 2022 | This sequence change replaces alanine, which is neutral and non-polar, with valine, which is neutral and non-polar, at codon 559 of the VPS33A protein (p.Ala559Val). This variant is not present in population databases (gnomAD no frequency). This variant has not been reported in the literature in individuals affected with VPS33A-related conditions. Algorithms developed to predict the effect of missense changes on protein structure and function are either unavailable or do not agree on the potential impact of this missense change (SIFT: "Deleterious"; PolyPhen-2: "Possibly Damaging"; Align-GVGD: "Class C0"). 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. - |
Computational scores
Source:
Name
Calibrated prediction
Score
Prediction
AlphaMissense
Pathogenic
BayesDel_addAF
Pathogenic
D
BayesDel_noAF
Uncertain
Cadd
Pathogenic
Dann
Pathogenic
DEOGEN2
Uncertain
D;.
Eigen
Pathogenic
Eigen_PC
Pathogenic
FATHMM_MKL
Pathogenic
D
LIST_S2
Uncertain
D;D
M_CAP
Benign
D
MetaRNN
Pathogenic
D;D
MetaSVM
Uncertain
D
MutationAssessor
Pathogenic
M;.
MutationTaster
Benign
D
PrimateAI
Uncertain
T
PROVEAN
Uncertain
D;.
REVEL
Uncertain
Sift
Uncertain
D;.
Sift4G
Uncertain
D;.
Polyphen
D;.
Vest4
MutPred
Gain of catalytic residue at A559 (P = 0.2501);.;
MVP
MPC
ClinPred
D
GERP RS
Varity_R
gMVP
Splicing
Name
Calibrated prediction
Score
Prediction
SpliceAI score (max)
Details are displayed if max score is > 0.2
Find out detailed SpliceAI scores and Pangolin per-transcript scores at
Publications
No publications associated with this variant yet.