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Open data
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Basic information
Entry | Database: PDB / ID: 8kea | ||||||
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Title | Cyanophage A-1(L) baseplate-initiators | ||||||
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![]() | VIRAL PROTEIN / baseplate / virus | ||||||
Biological species | ![]() | ||||||
Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.44 Å | ||||||
![]() | Yu, R.C. / Li, Q. / Zhou, C.Z. | ||||||
Funding support | ![]()
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![]() | ![]() Title: Structure of the intact tail machine of Anabaena myophage A-1(L). Authors: Rong-Cheng Yu / Feng Yang / Hong-Yan Zhang / Pu Hou / Kang Du / Jie Zhu / Ning Cui / Xudong Xu / Yuxing Chen / Qiong Li / Cong-Zhao Zhou / ![]() Abstract: The Myoviridae cyanophage A-1(L) specifically infects the model cyanobacteria Anabaena sp. PCC 7120. Following our recent report on the capsid structure of A-1(L), here we present the high-resolution ...The Myoviridae cyanophage A-1(L) specifically infects the model cyanobacteria Anabaena sp. PCC 7120. Following our recent report on the capsid structure of A-1(L), here we present the high-resolution cryo-EM structure of its intact tail machine including the neck, tail and attached fibers. Besides the dodecameric portal, the neck contains a canonical hexamer connected to a unique pentadecamer that anchors five extended bead-chain-like neck fibers. The 1045-Å-long contractile tail is composed of a helical bundle of tape measure proteins surrounded by a layer of tube proteins and a layer of sheath proteins, ended with a five-component baseplate. The six long and six short tail fibers are folded back pairwise, each with one end anchoring to the baseplate and the distal end pointing to the capsid. Structural analysis combined with biochemical assays further enable us to identify the dual hydrolytic activities of the baseplate hub, in addition to two host receptor binding domains in the tail fibers. Moreover, the structure of the intact A-1(L) also helps us to reannotate its genome. These findings will facilitate the application of A-1(L) as a chassis cyanophage in synthetic biology. | ||||||
History |
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Structure visualization
Structure viewer | Molecule: ![]() ![]() |
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Downloads & links
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Download
PDBx/mmCIF format | ![]() | 2.3 MB | Display | ![]() |
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PDB format | ![]() | Display | ![]() | |
PDBx/mmJSON format | ![]() | Tree view | ![]() | |
Others | ![]() |
-Validation report
Arichive directory | ![]() ![]() | HTTPS FTP |
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-Related structure data
Related structure data | ![]() 37151MC ![]() 8ke9C ![]() 8kecC ![]() 8keeC ![]() 8kefC ![]() 8kegC ![]() 8ts6C M: map data used to model this data C: citing same article ( |
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Links
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Assembly
Deposited unit | ![]()
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1 |
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Components
-Protein , 6 types, 27 molecules ABCDEFGHIJKLMNOPQRSTUVWXYZa
#1: Protein | Mass: 98390.594 Da / Num. of mol.: 3 / Source method: isolated from a natural source / Source: (natural) ![]() #2: Protein | Mass: 29607.072 Da / Num. of mol.: 3 / Source method: isolated from a natural source / Source: (natural) ![]() #3: Protein | Mass: 73969.227 Da / Num. of mol.: 3 / Source method: isolated from a natural source / Source: (natural) ![]() #4: Protein | Mass: 17151.273 Da / Num. of mol.: 6 / Source method: isolated from a natural source / Source: (natural) ![]() #5: Protein | Mass: 31966.795 Da / Num. of mol.: 6 / Source method: isolated from a natural source / Source: (natural) ![]() #6: Protein | Mass: 12997.665 Da / Num. of mol.: 6 / Source method: isolated from a natural source / Source: (natural) ![]() |
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-Wedge protein ... , 2 types, 18 molecules bdeghjkmnpqscfilor
#7: Protein | Mass: 42385.879 Da / Num. of mol.: 12 / Source method: isolated from a natural source / Source: (natural) ![]() #8: Protein | Mass: 22423.377 Da / Num. of mol.: 6 / Source method: isolated from a natural source / Source: (natural) ![]() |
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-Details
Has ligand of interest | N |
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-Experimental details
-Experiment
Experiment | Method: ELECTRON MICROSCOPY |
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EM experiment | Aggregation state: PARTICLE / 3D reconstruction method: single particle reconstruction |
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Sample preparation
Component | Name: unclassified Caudoviricetes / Type: VIRUS / Entity ID: all / Source: NATURAL |
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Source (natural) | Organism: ![]() |
Details of virus | Empty: NO / Enveloped: NO / Isolate: OTHER / Type: VIRION |
Natural host | Organism: Nostoc sp. PCC 7120 = FACHB-418 |
Buffer solution | pH: 7.5 |
Specimen | Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES |
Vitrification | Cryogen name: ETHANE / Humidity: 100 % / Chamber temperature: 300 K |
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Electron microscopy imaging
Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |
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Microscopy | Model: FEI TITAN KRIOS |
Electron gun | Electron source: ![]() |
Electron lens | Mode: BRIGHT FIELD / Nominal defocus max: 2500 nm / Nominal defocus min: 1500 nm |
Image recording | Electron dose: 50 e/Å2 / Film or detector model: GATAN K2 SUMMIT (4k x 4k) |
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Processing
EM software | Name: RELION / Version: 3.1 / Category: 3D reconstruction |
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CTF correction | Type: PHASE FLIPPING ONLY |
3D reconstruction | Resolution: 3.44 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 41062 / Symmetry type: POINT |