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Yorodumi- PDB-5lfq: Crystal Structure of the Bacterial Proteasome Activator Bpa of My... -
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Basic information
| Entry | Database: PDB / ID: 5lfq | ||||||
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| Title | Crystal Structure of the Bacterial Proteasome Activator Bpa of Mycobacterium tuberculosis (space group P3) | ||||||
Components | Bacterial proteasome activator | ||||||
Keywords | SIGNALING PROTEIN / Dodecamer / four-helix bundle | ||||||
| Function / homology | Bacterial proteasome activator / Bacterial proteasome activator / proteasome accessory complex / positive regulation of proteasomal protein catabolic process / proteasome binding / peptidoglycan-based cell wall / protein homooligomerization / plasma membrane / Bacterial proteasome activator Function and homology information | ||||||
| Biological species | Mycobacterium tuberculosis H37Rv (bacteria) | ||||||
| Method | X-RAY DIFFRACTION / SYNCHROTRON / MOLECULAR REPLACEMENT / molecular replacement / Resolution: 3.503 Å | ||||||
Authors | Bolten, M. / Delley, C.L. / Leibundgut, M. / Boehringer, D. / Ban, N. / Weber-Ban, E. | ||||||
Citation | Journal: Structure / Year: 2016Title: Structural Analysis of the Bacterial Proteasome Activator Bpa in Complex with the 20S Proteasome. Authors: Marcel Bolten / Cyrille L Delley / Marc Leibundgut / Daniel Boehringer / Nenad Ban / Eilika Weber-Ban / ![]() Abstract: Mycobacterium tuberculosis harbors proteasomes that recruit substrates for degradation through an ubiquitin-like modification pathway. Recently, a non-ATPase activator termed Bpa (bacterial ...Mycobacterium tuberculosis harbors proteasomes that recruit substrates for degradation through an ubiquitin-like modification pathway. Recently, a non-ATPase activator termed Bpa (bacterial proteasome activator) was shown to support an alternate proteasomal degradation pathway. Here, we present the cryo-electron microscopy (cryo-EM) structure of Bpa in complex with the 20S core particle (CP). For docking into the cryo-EM density, we solved the X-ray structure of Bpa, showing that it forms tight four-helix bundles arranged into a 12-membered ring with a 40 Å wide central pore and the C-terminal helix of each protomer protruding from the ring. The Bpa model was fitted into the cryo-EM map of the Bpa-CP complex, revealing its architecture and striking symmetry mismatch. The Bpa-CP interface was resolved to 3.5 Å, showing the interactions between the C-terminal GQYL motif of Bpa and the proteasome α-rings. This docking mode is related to the one observed for eukaryotic activators with features specific to the bacterial complex. | ||||||
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| Structure viewer | Molecule: Molmil Jmol/JSmol |
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| PDBx/mmCIF format | 5lfq.cif.gz | 709.6 KB | Display | PDBx/mmCIF format |
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| PDB format | pdb5lfq.ent.gz | 599.1 KB | Display | PDB format |
| PDBx/mmJSON format | 5lfq.json.gz | Tree view | PDBx/mmJSON format | |
| Others | Other downloads |
-Validation report
| Summary document | 5lfq_validation.pdf.gz | 553.1 KB | Display | wwPDB validaton report |
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| Full document | 5lfq_full_validation.pdf.gz | 572.4 KB | Display | |
| Data in XML | 5lfq_validation.xml.gz | 55.7 KB | Display | |
| Data in CIF | 5lfq_validation.cif.gz | 78.4 KB | Display | |
| Arichive directory | https://data.pdbj.org/pub/pdb/validation_reports/lf/5lfq ftp://data.pdbj.org/pub/pdb/validation_reports/lf/5lfq | HTTPS FTP |
-Related structure data
| Related structure data | ![]() 4127C ![]() 4128C ![]() 5lfjC ![]() 5lfpSC ![]() 5lzpC C: citing same article ( S: Starting model for refinement |
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| Similar structure data |
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Assembly
| Deposited unit | ![]()
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| Noncrystallographic symmetry (NCS) | NCS domain:
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Mycobacterium tuberculosis H37Rv (bacteria)
X-RAY DIFFRACTION
Citation










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