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Center for Computational Systems Medicine
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Fusion Gene and Fusion Protein Summary

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Fusion Amino Acid Sequences (multiple BPs and multiple gene isoforms)

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Fusion Protein Breakpoint Sequences - (for the Screening of the FusionNeoAntigens)

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Potential FusionNeoAntigens in HLA I - (netMHCpan v4.1 + deepHLApan v1.1)

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Potential FusionNeoAntigens in HLA II - (netMHCIIpan v4.1)

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Fusion Breakpoint 14 AA Peptide Structure - (RoseTTAFold)

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Filtering FusionNeoAntigens Through Checking the Interaction with HLAs in 3D - (Glide)

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Vaccine Design for the FusionNeoAntigens (RNA/protein sequences)

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Potential target of CAR-T therapy development

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Information on the samples that have these potential fusion neoantigens

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Fusion Protein Targeting Drugs - (Manual Curation)

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Fusion Protein Related diseases - (Manual Curation)

Fusion Protein:AP2A1-VRK3

Fusion Gene and Fusion Protein Summary

check button Fusion gene summary
Fusion partner gene informationFusion gene name: AP2A1-VRK3
FusionPDB ID: 5222
FusionGDB2.0 ID: 5222
HgeneTgene
Gene symbol

AP2A1

VRK3

Gene ID

160

51231

Gene nameadaptor related protein complex 2 subunit alpha 1VRK serine/threonine kinase 3
SynonymsADTAA|AP2-ALPHA|CLAPA1-
Cytomap

19q13.33

19q13.33

Type of geneprotein-codingprotein-coding
DescriptionAP-2 complex subunit alpha-1100 kDa coated vesicle protein Aadapter-related protein complex 2 alpha-1 subunitadapter-related protein complex 2 subunit alpha-1adaptin, alpha Aadaptor protein complex AP-2 subunit alpha-1adaptor related protein complexinactive serine/threonine-protein kinase VRK3serine/threonine-protein kinase VRK3serine/threonine-protein pseudokinase VRK3vaccinia related kinase 3
Modification date2020031320200313
UniProtAcc

O95782

Main function of 5'-partner protein: FUNCTION: Component of the adaptor protein complex 2 (AP-2). Adaptor protein complexes function in protein transport via transport vesicles in different membrane traffic pathways. Adaptor protein complexes are vesicle coat components and appear to be involved in cargo selection and vesicle formation. AP-2 is involved in clathrin-dependent endocytosis in which cargo proteins are incorporated into vesicles surrounded by clathrin (clathrin-coated vesicles, CCVs) which are destined for fusion with the early endosome. The clathrin lattice serves as a mechanical scaffold but is itself unable to bind directly to membrane components. Clathrin-associated adaptor protein (AP) complexes which can bind directly to both the clathrin lattice and to the lipid and protein components of membranes are considered to be the major clathrin adaptors contributing the CCV formation. AP-2 also serves as a cargo receptor to selectively sort the membrane proteins involved in receptor-mediated endocytosis. AP-2 seems to play a role in the recycling of synaptic vesicle membranes from the presynaptic surface. AP-2 recognizes Y-X-X-[FILMV] (Y-X-X-Phi) and [ED]-X-X-X-L-[LI] endocytosis signal motifs within the cytosolic tails of transmembrane cargo molecules. AP-2 may also play a role in maintaining normal post-endocytic trafficking through the ARF6-regulated, non-clathrin pathway. During long-term potentiation in hippocampal neurons, AP-2 is responsible for the endocytosis of ADAM10 (PubMed:23676497). The AP-2 alpha subunit binds polyphosphoinositide-containing lipids, positioning AP-2 on the membrane. The AP-2 alpha subunit acts via its C-terminal appendage domain as a scaffolding platform for endocytic accessory proteins. The AP-2 alpha and AP-2 sigma subunits are thought to contribute to the recognition of the [ED]-X-X-X-L-[LI] motif (By similarity). {ECO:0000250, ECO:0000269|PubMed:14745134, ECO:0000269|PubMed:15473838, ECO:0000269|PubMed:19033387, ECO:0000269|PubMed:23676497}.
.
Ensembl transtripts involved in fusion geneENST idsENST00000600199, ENST00000354293, 
ENST00000359032, 
ENST00000316763, 
ENST00000377011, ENST00000443401, 
ENST00000594948, ENST00000599538, 
ENST00000601341, ENST00000424804, 
ENST00000593919, ENST00000594092, 
ENST00000601912, 
Fusion gene scores for assessment (based on all fusion genes of FusionGDB 2.0)* DoF score8 X 10 X 7=5606 X 6 X 5=180
# samples 127
** MAII scorelog2(12/560*10)=-2.22239242133645
possibly effective Gene in Pan-Cancer Fusion Genes (peGinPCFGs).
DoF>8 and MAII<0
log2(7/180*10)=-1.36257007938471
possibly effective Gene in Pan-Cancer Fusion Genes (peGinPCFGs).
DoF>8 and MAII<0
Fusion gene context

PubMed: AP2A1 [Title/Abstract] AND VRK3 [Title/Abstract] AND fusion [Title/Abstract]

Fusion neoantigen context

PubMed: AP2A1 [Title/Abstract] AND VRK3 [Title/Abstract] AND neoantigen [Title/Abstract]

Most frequent breakpoint (based on all fusion genes of FusionGDB 2.0)AP2A1(50295321)-VRK3(50482499), # samples:2
Anticipated loss of major functional domain due to fusion event.AP2A1-VRK3 seems lost the major protein functional domain in Hgene partner, which is a CGC by not retaining the major functional domain in the partially deleted in-frame ORF.
AP2A1-VRK3 seems lost the major protein functional domain in Hgene partner, which is a CGC by not retaining the major functional domain in the partially deleted in-frame ORF.
AP2A1-VRK3 seems lost the major protein functional domain in Hgene partner, which is a essential gene by not retaining the major functional domain in the partially deleted in-frame ORF.
AP2A1-VRK3 seems lost the major protein functional domain in Hgene partner, which is a essential gene by not retaining the major functional domain in the partially deleted in-frame ORF.
AP2A1-VRK3 seems lost the major protein functional domain in Hgene partner, which is a essential gene due to the frame-shifted ORF.
AP2A1-VRK3 seems lost the major protein functional domain in Tgene partner, which is a IUPHAR drug target due to the frame-shifted ORF.
AP2A1-VRK3 seems lost the major protein functional domain in Tgene partner, which is a kinase due to the frame-shifted ORF.
* DoF score (Degree of Frequency) = # partners X # break points X # cancer types
** MAII score (Major Active Isofusion Index) = log2(# samples/DoF score*10)

check button Gene ontology of each fusion partner gene with evidence of Inferred from Direct Assay (IDA) from Entrez
PartnerGeneGO IDGO termPubMed ID
HgeneAP2A1

GO:0072583

clathrin-dependent endocytosis

23676497

HgeneAP2A1

GO:1900126

negative regulation of hyaluronan biosynthetic process

24251095



check button Four levels of functional features of fusion genes
Go to FGviewer search page for the most frequent breakpoint (https://ccsmweb.uth.edu/FGviewer/chr19:50295321/chr19:50482499)
- FGviewer provides the online visualization of the retention search of the protein functional features across DNA, RNA, protein, and pathological levels.
- How to search
1. Put your fusion gene symbol.
2. Press the tab key until there will be shown the breakpoint information filled.
4. Go down and press 'Search' tab twice.
4. Go down to have the hyperlink of the search result.
5. Click the hyperlink.
6. See the FGviewer result for your fusion gene.
FGviewer

check buttonRetention analysis results of each fusion partner protein across 39 protein features of UniProt such as six molecule processing features, 13 region features, four site features, six amino acid modification features, two natural variation features, five experimental info features, and 3 secondary structure features, are available here.

check buttonFusion gene breakpoints across AP2A1 (5'-gene)
* Click on the image to open the UCSC genome browser with custom track showing this image in a new window.
all structure

check buttonFusion gene breakpoints across VRK3 (3'-gene)
* Click on the image to open the UCSC genome browser with custom track showing this image in a new window.
all structure


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Fusion Amino Acid Sequences


check buttonFusion information from ORFfinder translation from full-length transcript sequence from FusionPDB.
HenstTenstHgeneHchrHbpHstrandTgeneTchrTbpTstrandSeq length
(transcript)
BP loci
(transcript)
Predicted start
(transcript)
Predicted stop
(transcript)
Seq length
(amino acids)
ENST00000354293AP2A1chr1950308833+ENST00000316763VRK3chr1950482499-31122634672679870
ENST00000354293AP2A1chr1950308833+ENST00000377011VRK3chr1950482499-30872634672679870
ENST00000354293AP2A1chr1950308833+ENST00000599538VRK3chr1950482499-28192634672679870
ENST00000354293AP2A1chr1950308833+ENST00000443401VRK3chr1950482499-33082634672679870
ENST00000354293AP2A1chr1950308833+ENST00000601341VRK3chr1950482499-31642634672679870
ENST00000354293AP2A1chr1950308833+ENST00000594948VRK3chr1950482499-31172634672679870
ENST00000359032AP2A1chr1950308833+ENST00000316763VRK3chr1950482499-3012253402579859
ENST00000359032AP2A1chr1950308833+ENST00000377011VRK3chr1950482499-2987253402579859
ENST00000359032AP2A1chr1950308833+ENST00000599538VRK3chr1950482499-2719253402579859
ENST00000359032AP2A1chr1950308833+ENST00000443401VRK3chr1950482499-3208253402579859
ENST00000359032AP2A1chr1950308833+ENST00000601341VRK3chr1950482499-3064253402579859
ENST00000359032AP2A1chr1950308833+ENST00000594948VRK3chr1950482499-3017253402579859

check buttonDeepORF prediction of the coding potential based on the fusion transcript sequence of in-frame fusion genes. DeepORF is a coding potential classifier based on convolutional neural network by comparing the real Ribo-seq data. If the no-coding score < 0.5 and coding score > 0.5, then the in-frame fusion transcript is predicted as being likely translated.
HenstTenstHgeneHchrHbpHstrandTgeneTchrTbpTstrandNo-coding scoreCoding score
ENST00000354293ENST00000316763AP2A1chr1950308833+VRK3chr1950482499-0.0081386160.99186134
ENST00000354293ENST00000377011AP2A1chr1950308833+VRK3chr1950482499-0.0090062120.9909938
ENST00000354293ENST00000599538AP2A1chr1950308833+VRK3chr1950482499-0.0110264910.98897356
ENST00000354293ENST00000443401AP2A1chr1950308833+VRK3chr1950482499-0.0096470410.9903529
ENST00000354293ENST00000601341AP2A1chr1950308833+VRK3chr1950482499-0.0104335590.98956645
ENST00000354293ENST00000594948AP2A1chr1950308833+VRK3chr1950482499-0.0109163630.9890836
ENST00000359032ENST00000316763AP2A1chr1950308833+VRK3chr1950482499-0.0082478150.9917522
ENST00000359032ENST00000377011AP2A1chr1950308833+VRK3chr1950482499-0.0092255920.99077445
ENST00000359032ENST00000599538AP2A1chr1950308833+VRK3chr1950482499-0.0122289430.98777103
ENST00000359032ENST00000443401AP2A1chr1950308833+VRK3chr1950482499-0.0093855170.99061453
ENST00000359032ENST00000601341AP2A1chr1950308833+VRK3chr1950482499-0.0101103050.9898896
ENST00000359032ENST00000594948AP2A1chr1950308833+VRK3chr1950482499-0.0105316090.9894684

check button Predicted full-length fusion amino acid sequences. For individual full-length fusion transcript sequence from FusionPDB, we ran ORFfinder and chose the longest ORF among all the predicted ones.

Get the fusion protein sequences from here.

Fusion protein sequence information is available in the fasta format.
>FusionGDB ID_FusionGDB isoform ID_FGname_Hgene_Hchr_Hbp_Henst_Tgene_Tchr_Tbp_Tenst_length(fusion AA) seq_BP

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Fusion Protein Breakpoint Sequences for AP2A1-VRK3

check button +/-13 AA sequence from the breakpoints of the fusion protein sequences.
HgeneHchrHbpTgeneTchrTbpLength(fusion protein)BP in fusion proteinPeptide
AP2A1chr1950308833VRK3chr19504824992534844RDFLTPPLLSVRFRDPAEVPEGGDGP
AP2A1chr1950308833VRK3chr19504824992634855RDFLTPPLLSVRFRDPAEVPEGGDGP

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Potential FusionNeoAntigen Information of AP2A1-VRK3 in HLA I

check button Multiple sequence alignments of the potential FusionNeoAntigens per fusion breakpoints. If the MSA is empty, then it means that there were predicted fusion neoantigens in this fusion breakpoint, but those predicted fusion neoantigens were not across the breakpoint, which is not fusion-specific.
AP2A1-VRK3_50308833_50482499.msa

check button Potential FusionNeoAntigen Information
* We used NetMHCpan v4.1 (%rank<0.5) and deepHLApan v1.1 (immunogenic score>0.5)
Fusion geneHchrHbpTgeneTchrTbpHLA IFusionNeoAntigen peptideBinding scoreImmunogenic scoreNeoantigen start (at BP 13)Neoantigen end (at BP 13)
AP2A1-VRK3chr1950308833chr19504824992634HLA-B27:04VRFRDPAEV0.99980.71651019
AP2A1-VRK3chr1950308833chr19504824992634HLA-B27:07VRFRDPAEV0.99960.63981019
AP2A1-VRK3chr1950308833chr19504824992634HLA-B39:06VRFRDPAEV0.98520.77571019
AP2A1-VRK3chr1950308833chr19504824992634HLA-B27:14VRFRDPAEV0.99980.5911019
AP2A1-VRK3chr1950308833chr19504824992634HLA-B73:01VRFRDPAEV0.99740.87091019
AP2A1-VRK3chr1950308833chr19504824992634HLA-C07:05VRFRDPAEV0.96890.94491019
AP2A1-VRK3chr1950308833chr19504824992634HLA-C07:95VRFRDPAEV0.94920.68831019
AP2A1-VRK3chr1950308833chr19504824992634HLA-C07:27VRFRDPAEV0.93680.9451019
AP2A1-VRK3chr1950308833chr19504824992634HLA-C07:13VRFRDPAEV0.87860.88661019
AP2A1-VRK3chr1950308833chr19504824992634HLA-C12:16VRFRDPAEV0.02970.93311019
AP2A1-VRK3chr1950308833chr19504824992634HLA-B73:01VRFRDPAEVP0.98850.84351020
AP2A1-VRK3chr1950308833chr19504824992634HLA-B27:06VRFRDPAEV0.99980.7921019
AP2A1-VRK3chr1950308833chr19504824992634HLA-B27:09VRFRDPAEV0.99960.55951019
AP2A1-VRK3chr1950308833chr19504824992634HLA-C06:08VRFRDPAEV0.99380.98721019
AP2A1-VRK3chr1950308833chr19504824992634HLA-C07:01VRFRDPAEV0.95940.71981019
AP2A1-VRK3chr1950308833chr19504824992634HLA-C07:22VRFRDPAEV0.47360.63161019
AP2A1-VRK3chr1950308833chr19504824992634HLA-C06:02VRFRDPAEV0.22810.98861019
AP2A1-VRK3chr1950308833chr19504824992634HLA-C06:17VRFRDPAEV0.22810.98861019

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Potential FusionNeoAntigen Information of AP2A1-VRK3 in HLA II

check button Multiple sequence alignments of the potential FusionNeoAntigens per fusion breakpoints. If the MSA is empty, then it means that there were predicted fusion neoantigens in this fusion breakpoint, but those predicted fusion neoantigens were not across the breakpoint, which is not fusion-specific.

check button Potential FusionNeoAntigen Information
* We used NetMHCIIpan v4.1 (%rank<0.5).
Fusion geneHchrHbpTgeneTchrTbpHLA IIFusionNeoAntigen peptideNeoantigen start (at BP 13)Neoantigen end (at BP 13)

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Fusion breakpoint peptide structures of AP2A1-VRK3

check button3D structures of the fusion breakpoint peptide of 14AA sequence that have potential fusion neoantigens
* The minimum length of the amino acid sequence in RoseTTAFold is 14AA. Here, we predicted the 14AA fusion protein breakpoint sequence not the fusion neoantigen peptide, which is shorter than 14 AA.
File nameBPseqHgeneTgeneHchrHbpTchrTbpAAlen
6771PLLSVRFRDPAEVPAP2A1VRK3chr1950308833chr19504824992634

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Filtering FusionNeoAntigens Through Checking the Interaction with HLAs in 3D of AP2A1-VRK3

check buttonVirtual screening between 25 HLAs (from PDB) and FusionNeoAntigens
* We used Glide to predict the interaction between HLAs and neoantigens.
HLA allelePDB IDFile nameBPseqDocking scoreGlide score
HLA-B14:023BVN6771PLLSVRFRDPAEVP-7.9962-8.1096
HLA-B14:023BVN6771PLLSVRFRDPAEVP-5.70842-6.74372
HLA-B52:013W396771PLLSVRFRDPAEVP-6.83737-6.95077
HLA-B52:013W396771PLLSVRFRDPAEVP-4.4836-5.5189
HLA-A11:014UQ26771PLLSVRFRDPAEVP-10.0067-10.1201
HLA-A11:014UQ26771PLLSVRFRDPAEVP-9.03915-10.0745
HLA-A24:025HGA6771PLLSVRFRDPAEVP-6.56204-6.67544
HLA-A24:025HGA6771PLLSVRFRDPAEVP-5.42271-6.45801
HLA-B44:053DX86771PLLSVRFRDPAEVP-7.85648-8.89178
HLA-B44:053DX86771PLLSVRFRDPAEVP-5.3978-5.5112
HLA-A02:016TDR6771PLLSVRFRDPAEVP-3.37154-4.40684

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Vaccine Design for the FusionNeoAntigens of AP2A1-VRK3

check button mRNA and peptide sequences of FusionNeoAntigens that have potential interaction with HLA-Is.
Fusion geneHchrHbpTchrTbpStart in +/-13AAEnd in +/-13AAFusionNeoAntigen peptide sequenceFusionNeoAntigen RNA sequence
AP2A1-VRK3chr1950308833chr19504824991019VRFRDPAEVGCGCTTCCGAGACCCTGCAGAAGTACC
AP2A1-VRK3chr1950308833chr19504824991020VRFRDPAEVPGCGCTTCCGAGACCCTGCAGAAGTACCTGA

check button mRNA and peptide sequences of FusionNeoAntigens that have potential interaction with HLA-IIs.
Fusion geneHchrHbpTchrTbpStart in +/-13AAEnd in +/-13AAFusionNeoAntigen peptideFusionNEoAntigen RNA sequence

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Information of the samples that have these potential fusion neoantigens of AP2A1-VRK3

check button These samples were reported as having these fusion breakpoints. For individual breakpoints, we checked the open reading frames considering multiple gene isoforms and chose the in-frame fusion genes only. Then, we made fusion protein sequences and predicted the fusion neoantigens. These fusion-positive samples may have these potential fusion neoantigens.
Cancer typeFusion geneHchrHbpHenstTchrTbpTenstSample
CESCAP2A1-VRK3chr1950308833ENST00000354293chr1950482499ENST00000316763TCGA-IR-A3LH-01A

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Potential target of CAR-T therapy development for AP2A1-VRK3

check button Predicted 3D structure. We used RoseTTAFold.

check buttonRetention analysis result of each fusion partner protein across 39 protein features of UniProt such as six molecule processing features, 13 region features, four site features, six amino acid modification features, two natural variation features, five experimental info features, and 3 secondary structure features. Here, to provide the retention of the transmembrane domain, we only show the protein feature retention information of those transmembrane features


* Minus value of BPloci means that the break point is located before the CDS.
- In-frame and retained 'Transmembrane'.
PartnerGeneHbpTbpENSTStrandBPexonTotalExonProtein feature loci*BPlociTotalLenProtein featureProtein feature note

check button Subcellular localization prediction of the transmembrane domain retained fusion proteins
* We used DeepLoc 1.0. The order of the X-axis of the barplot is as follows: Entry_ID, Localization, Type, Nucleus, Cytoplasm, Extracellular, Mitochondrion, Cell_membrane, Endoplasmic_reticulum, Plastid, Golgi.apparatus, Lysosome.Vacuole, Peroxisome. Y-axis is the output score of DeepLoc. Clicking the image will open a new tab with a large image.
HgeneHchrHbpHenstTgeneTchrTbpTenstDeepLoc result

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Related Drugs to AP2A1-VRK3

check button Drugs used for this fusion-positive patient.
(Manual curation of PubMed, 04-30-2022 + MyCancerGenome)
HgeneTgeneDrugSourcePMID

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Related Diseases to AP2A1-VRK3

check button Diseases that have this fusion gene.
(Manual curation of PubMed, 04-30-2022 + MyCancerGenome)
HgeneTgeneDiseaseSourcePMID

check button Diseases associated with fusion partners.
(DisGeNet 4.0)
PartnerGeneDisease IDDisease name# pubmedsSource