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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:KLK3-CDC42EP4

Fusion Gene and Fusion Protein Summary

check button Fusion gene summary
Fusion partner gene informationFusion gene name: KLK3-CDC42EP4
FusionPDB ID: 43076
FusionGDB2.0 ID: 43076
HgeneTgene
Gene symbol

KLK3

CDC42EP4

Gene ID

3818

23580

Gene namekallikrein B1CDC42 effector protein 4
SynonymsKLK3|PKK|PKKD|PPKBORG4|CEP4|KAIA1777
Cytomap

4q35.2

17q25.1

Type of geneprotein-codingprotein-coding
Descriptionplasma kallikreinkallikrein B, plasma (Fletcher factor) 1kininogeninplasma prekallikreincdc42 effector protein 4CDC42 effector protein (Rho GTPase binding) 4binder of Rho GTPases 4
Modification date2020032020200313
UniProtAcc

P07288

Main function of 5'-partner protein: FUNCTION: Hydrolyzes semenogelin-1 thus leading to the liquefaction of the seminal coagulum.

Q9H3Q1

Main function of 5'-partner protein: FUNCTION: Probably involved in the organization of the actin cytoskeleton. May act downstream of CDC42 to induce actin filament assembly leading to cell shape changes. Induces pseudopodia formation, when overexpressed in fibroblasts.
Ensembl transtripts involved in fusion geneENST idsENST00000326003, ENST00000360617, 
ENST00000593997, ENST00000595952, 
ENST00000597483, 
ENST00000581014, 
ENST00000582303, ENST00000335793, 
ENST00000439510, 
Fusion gene scores for assessment (based on all fusion genes of FusionGDB 2.0)* DoF score24 X 31 X 2=14887 X 3 X 6=126
# samples 3110
** MAII scorelog2(31/1488*10)=-2.26303440583379
possibly effective Gene in Pan-Cancer Fusion Genes (peGinPCFGs).
DoF>8 and MAII<0
log2(10/126*10)=-0.333423733725192
possibly effective Gene in Pan-Cancer Fusion Genes (peGinPCFGs).
DoF>8 and MAII<0
Fusion gene context

PubMed: KLK3 [Title/Abstract] AND CDC42EP4 [Title/Abstract] AND fusion [Title/Abstract]

Fusion neoantigen context

PubMed: KLK3 [Title/Abstract] AND CDC42EP4 [Title/Abstract] AND neoantigen [Title/Abstract]

Most frequent breakpoint (based on all fusion genes of FusionGDB 2.0)KLK3(51361401)-CDC42EP4(71282209), # samples:1
Anticipated loss of major functional domain due to fusion event.KLK3-CDC42EP4 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.
KLK3-CDC42EP4 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.
KLK3-CDC42EP4 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.
KLK3-CDC42EP4 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.
KLK3-CDC42EP4 seems lost the major protein functional domain in Hgene partner, which is a IUPHAR drug target 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
HgeneKLK3

GO:0031639

plasminogen activation

89876

HgeneKLK3

GO:0051919

positive regulation of fibrinolysis

89876

TgeneCDC42EP4

GO:0008360

regulation of cell shape

11035016

TgeneCDC42EP4

GO:0031274

positive regulation of pseudopodium assembly

11035016



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/chr19:51361401/chr17:71282209)
- 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 KLK3 (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 CDC42EP4 (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)
ENST00000326003KLK3chr1951361401+ENST00000439510CDC42EP4chr1771282209-2863417171057346
ENST00000593997KLK3chr1951361401+ENST00000439510CDC42EP4chr1771282209-2843397211037338
ENST00000360617KLK3chr1951361401+ENST00000439510CDC42EP4chr1771282209-282237601016338

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
ENST00000326003ENST00000439510KLK3chr1951361401+CDC42EP4chr1771282209-0.0170973330.98290265
ENST00000593997ENST00000439510KLK3chr1951361401+CDC42EP4chr1771282209-0.017056370.98294365
ENST00000360617ENST00000439510KLK3chr1951361401+CDC42EP4chr1771282209-0.0164056940.98359436

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 KLK3-CDC42EP4

check button +/-13 AA sequence from the breakpoints of the fusion protein sequences.
HgeneHchrHbpTgeneTchrTbpLength(fusion protein)BP in fusion proteinPeptide
KLK3chr1951361401CDC42EP4chr1771282209376126YASGWGSIEPEELKKANDGEGGDEEA
KLK3chr1951361401CDC42EP4chr1771282209397126YASGWGSIEPEELKKANDGEGGDEEA
KLK3chr1951361401CDC42EP4chr1771282209417134YASGWGSIEPEELKKANDGEGGDEEA

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Potential FusionNeoAntigen Information of KLK3-CDC42EP4 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.
KLK3-CDC42EP4_51361401_71282209.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)
KLK3-CDC42EP4chr1951361401chr1771282209417HLA-B50:02IEPEELKKA0.95210.6314716
KLK3-CDC42EP4chr1951361401chr1771282209417HLA-B41:01IEPEELKKA0.47280.9471716
KLK3-CDC42EP4chr1951361401chr1771282209417HLA-B50:01IEPEELKKA0.45190.765716
KLK3-CDC42EP4chr1951361401chr1771282209417HLA-B50:05IEPEELKKA0.45190.765716
KLK3-CDC42EP4chr1951361401chr1771282209417HLA-B50:04IEPEELKKA0.45190.765716

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Potential FusionNeoAntigen Information of KLK3-CDC42EP4 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 KLK3-CDC42EP4

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
8639SIEPEELKKANDGEKLK3CDC42EP4chr1951361401chr1771282209417

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Filtering FusionNeoAntigens Through Checking the Interaction with HLAs in 3D of KLK3-CDC42EP4

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-B14:023BVN8639SIEPEELKKANDGE-7.15543-7.26883
HLA-B14:023BVN8639SIEPEELKKANDGE-4.77435-5.80965
HLA-B52:013W398639SIEPEELKKANDGE-6.80875-6.92215
HLA-B52:013W398639SIEPEELKKANDGE-4.20386-5.23916
HLA-A11:014UQ28639SIEPEELKKANDGE-7.5194-8.5547
HLA-A11:014UQ28639SIEPEELKKANDGE-6.9601-7.0735
HLA-A24:025HGA8639SIEPEELKKANDGE-7.52403-7.63743
HLA-A24:025HGA8639SIEPEELKKANDGE-5.82433-6.85963
HLA-B27:056PYJ8639SIEPEELKKANDGE-3.28285-4.31815
HLA-B44:053DX88639SIEPEELKKANDGE-5.91172-6.94702
HLA-B44:053DX88639SIEPEELKKANDGE-4.24346-4.35686

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Vaccine Design for the FusionNeoAntigens of KLK3-CDC42EP4

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
KLK3-CDC42EP4chr1951361401chr1771282209716IEPEELKKAGCATTGAACCAGAGGAGTTGAAGAAGG

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 KLK3-CDC42EP4

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
N/AKLK3-CDC42EP4chr1951361401ENST00000326003chr1771282209ENST00000439510DA874433

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Potential target of CAR-T therapy development for KLK3-CDC42EP4

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 KLK3-CDC42EP4

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 KLK3-CDC42EP4

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