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- EMDB-17672: Middle part of the Borrelia bacteriophage BB1 procapsid, tenfold-... -
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Open data
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Basic information
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Title | Middle part of the Borrelia bacteriophage BB1 procapsid, tenfold-symmetrized outer shell | ||||||||||||
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![]() | Bacteriophage / capsid / procapsid / VIRAL PROTEIN | ||||||||||||
Function / homology | Protein of unknown function DUF1357 / Protein of unknown function (DUF1357) / Uncharacterized protein![]() | ||||||||||||
Biological species | ![]() | ||||||||||||
Method | single particle reconstruction / cryo EM / Resolution: 2.65 Å | ||||||||||||
![]() | Rumnieks J / Fuzik T / Tars K | ||||||||||||
Funding support | European Union, 3 items
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![]() | ![]() Title: Structure of the Borrelia Bacteriophage φBB1 Procapsid. Authors: Jānis Rūmnieks / Tibor Füzik / Kaspars Tārs / ![]() ![]() Abstract: Bacteriophages of Borrelia burgdorferi are a biologically important but under-investigated feature of the Lyme disease-causing spirochete. No virulent borrelial viruses have been identified, but all ...Bacteriophages of Borrelia burgdorferi are a biologically important but under-investigated feature of the Lyme disease-causing spirochete. No virulent borrelial viruses have been identified, but all B. burgdorferi isolates carry a prophage φBB1 as resident circular plasmids. Like its host, the φBB1 phage is quite distinctive and shares little sequence similarity with other known bacteriophages. We expressed φBB1 head morphogenesis proteins in Escherichia coli which resulted in assembly of homogeneous prolate procapsid structures and used cryo-electron microscopy to determine the three-dimensional structure of these particles. The φBB1 procapsids consist of 415 copies of the major capsid protein and an equal combined number of three homologous capsid decoration proteins that form trimeric knobs on the outside of the particle. One of the end vertices of the particle is occupied by a portal assembled from twelve copies of the portal protein. The φBB1 scaffolding protein is entirely α-helical and has an elongated shape with a small globular domain in the middle. Within the tubular section of the procapsid, the internal scaffold is built of stacked rings, each composed of 32 scaffolding protein molecules, which run in opposite directions from both caps with a heterogeneous part in the middle. Inside the portal-containing cap, the scaffold is organized asymmetrically with ten scaffolding protein molecules bound to the portal. The φBB1 procapsid structure provides better insight into the vast structural diversity of bacteriophages and presents clues of how elongated bacteriophage particles might be assembled. | ||||||||||||
History |
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Structure visualization
Supplemental images |
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Downloads & links
-EMDB archive
Map data | ![]() | 206.1 MB | ![]() | |
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Header (meta data) | ![]() ![]() | 20.8 KB 20.8 KB | Display Display | ![]() |
FSC (resolution estimation) | ![]() | 22.5 KB | Display | ![]() |
Images | ![]() | 256.4 KB | ||
Masks | ![]() | 1000 MB | ![]() | |
Filedesc metadata | ![]() | 6.5 KB | ||
Others | ![]() ![]() | 814.7 MB 814.7 MB | ||
Archive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
Related structure data | ![]() 8phrMC ![]() 8phoC ![]() 8phpC ![]() 8phqC ![]() 8phsC ![]() 8phtC ![]() 8phuC ![]() 8pkhC ![]() 8qo0C ![]() 8qo1C M: atomic model generated by this map C: citing same article ( |
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Similar structure data | Similarity search - Function & homology ![]() |
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Links
EMDB pages | ![]() ![]() |
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Map
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Voxel size | X=Y=Z: 0.8336 Å | ||||||||||||||||||||
Density |
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Symmetry | Space group: 1 | ||||||||||||||||||||
Details | EMDB XML:
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-Supplemental data
-Mask #1
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Projections & Slices |
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Density Histograms |
-Half map: #2
File | emd_17672_half_map_1.map | ||||||||||||
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Projections & Slices |
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Density Histograms |
-Half map: #1
File | emd_17672_half_map_2.map | ||||||||||||
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Projections & Slices |
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Density Histograms |
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Sample components
-Entire : Middle part of the Borrelia bacteriophage BB1 procapsid
Entire | Name: Middle part of the Borrelia bacteriophage BB1 procapsid |
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Components |
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-Supramolecule #1: Middle part of the Borrelia bacteriophage BB1 procapsid
Supramolecule | Name: Middle part of the Borrelia bacteriophage BB1 procapsid type: complex / ID: 1 / Parent: 0 / Macromolecule list: all |
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Source (natural) | Organism: ![]() |
-Macromolecule #1: Major capsid protein
Macromolecule | Name: Major capsid protein / type: protein_or_peptide / ID: 1 / Number of copies: 15 / Enantiomer: LEVO |
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Source (natural) | Organism: ![]() |
Molecular weight | Theoretical: 36.255551 KDa |
Recombinant expression | Organism: ![]() ![]() |
Sequence | String: MELFDENYYA KAVANIIGEV KDPIMYKWFS PDQIEDVDLQ MGYQKTVKWD AFLNANPTTI ANEVNTISTI GFSSEVVRLN YLKLQYKFR HLKQTSEKFY TSDSYIGDIN NNLLPFAQAY KLASSEIIKL INHFVLTGTV SIQKDGKNQK RLLPNMYGLL N MPEQIKEE ...String: MELFDENYYA KAVANIIGEV KDPIMYKWFS PDQIEDVDLQ MGYQKTVKWD AFLNANPTTI ANEVNTISTI GFSSEVVRLN YLKLQYKFR HLKQTSEKFY TSDSYIGDIN NNLLPFAQAY KLASSEIIKL INHFVLTGTV SIQKDGKNQK RLLPNMYGLL N MPEQIKEE VASGDKDKMD KIFEKIEAGL SKLELGDEFS TPMMVIVDPA TSLKLVKPYA AAQGAASSCE KWEDVLIQTI KA INNREDV YIETSNLLKH KILIYPLNSE LIKFKPSKYM LPTPNEQVDK DSTDVAHSYI DFVLGGLLAT RKTILQVNIK QS |
-Macromolecule #2: Decorator protein P03
Macromolecule | Name: Decorator protein P03 / type: protein_or_peptide / ID: 2 / Number of copies: 8 / Enantiomer: LEVO |
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Source (natural) | Organism: ![]() |
Molecular weight | Theoretical: 20.026479 KDa |
Recombinant expression | Organism: ![]() ![]() |
Sequence | String: MSDITKIKQE FDKKVAEIQA LMKNPQQDSG LLSNSIDFRD QNLIFSNSGG VCTSSKDKIE NYPAKGYPYK RGVKLSFGDG TTELEVEAG GGDDLYGVCS DIDEFSGMAT VIPITNNFTG YLTLKKDGQN GVNPGDKLNF NQHGELEKVT GAQKSVNAIA L SKAHKLTE DLFIVLASVF GNRAIKG |
-Macromolecule #3: Decorator protein P05
Macromolecule | Name: Decorator protein P05 / type: protein_or_peptide / ID: 3 / Number of copies: 4 / Enantiomer: LEVO |
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Source (natural) | Organism: ![]() |
Molecular weight | Theoretical: 21.274934 KDa |
Recombinant expression | Organism: ![]() ![]() |
Sequence | String: MGDTTQLVKE YQEKRSKLEK FMKNPQHDAS LLSNSNEFRD KNVEFFASGG TRTSKFDKLE NHPFLGYPYK RGVKRVIQEA QDNQSHYEP HVEAGGGEDL YGICIDIDEF SKTATIVPIT NNFEGYLVAK DSTVKVKDKL IFNKDGALEK VTGAPNKATI N ATALTDAK QISNEVYLVK VAVFGNKAMS RN |
-Macromolecule #4: Scaffold protein
Macromolecule | Name: Scaffold protein / type: protein_or_peptide / ID: 4 / Number of copies: 15 / Enantiomer: LEVO |
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Source (natural) | Organism: ![]() |
Molecular weight | Theoretical: 26.710363 KDa |
Recombinant expression | Organism: ![]() ![]() |
Sequence | String: MTEKEEKEDL QAQDKEEQQI KADTKVISVQ EFEEYMRFKE QANSKSKETS RDLSINERIT KELAEVEERE RIEKQLLLEA ERINEIDTL AKAHLSNHFN KEVLLAKGYT LKDIMQAQRR ELVRKFVPIE QIKAIAKVSD ISHIDGEILE QLVSLAKVNI K LRKNASSS ...String: MTEKEEKEDL QAQDKEEQQI KADTKVISVQ EFEEYMRFKE QANSKSKETS RDLSINERIT KELAEVEERE RIEKQLLLEA ERINEIDTL AKAHLSNHFN KEVLLAKGYT LKDIMQAQRR ELVRKFVPIE QIKAIAKVSD ISHIDGEILE QLVSLAKVNI K LRKNASSS SSSVDSIKGN IAIKSEERAS LLDSNFVPIN FTEFVQAISN TYKQRRIQFY ENLKRHKRTS IA UniProtKB: Uncharacterized protein |
-Experimental details
-Structure determination
Method | cryo EM |
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![]() | single particle reconstruction |
Aggregation state | particle |
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Sample preparation
Concentration | 1 mg/mL | ||||||||||||
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Buffer | pH: 7.5 Component:
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Grid | Model: Quantifoil R1.2/1.3 / Material: GOLD / Mesh: 300 / Support film - #0 - Film type ID: 1 / Support film - #0 - Material: CARBON / Support film - #0 - topology: HOLEY / Support film - #1 - Film type ID: 2 / Support film - #1 - Material: GRAPHENE / Support film - #1 - topology: CONTINUOUS / Pretreatment - Type: GLOW DISCHARGE | ||||||||||||
Vitrification | Cryogen name: ETHANE / Chamber humidity: 100 % / Chamber temperature: 277 K / Instrument: FEI VITROBOT MARK IV |
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Electron microscopy
Microscope | FEI TITAN KRIOS |
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Specialist optics | Energy filter - Name: GIF Bioquantum |
Image recording | Film or detector model: GATAN K3 (6k x 4k) / Average electron dose: 44.0 e/Å2 |
Electron beam | Acceleration voltage: 300 kV / Electron source: ![]() |
Electron optics | Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Cs: 2.7 mm / Nominal defocus max: 1.8 µm / Nominal defocus min: 0.5 µm / Nominal magnification: 165000 |
Sample stage | Specimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER / Cooling holder cryogen: NITROGEN |
Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |
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Image processing
-Atomic model buiding 1
Initial model | Chain - Source name: Other / Chain - Initial model type: experimental model / Details: previous reconstruction |
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Output model | ![]() PDB-8phr: |