Biological Assembly 1  

 3D View: Structure | 1D-3D View | Electron Density | Validation Report

Global Symmetry: Icosahedral - I  (3D View)
Global Stoichiometry: Hetero 840-mer - A420B420 

Biological assembly 1 assigned by authors and generated by (software)

Biological Assembly Evidence: mass spectrometry

Macromolecule Content

• Total Structure Weight: 378.46 kDa 
• Atom Count: 23303 
• Modelled Residue Count: 3094 
• Deposited Residue Count: 3500 
• Unique protein chains: 2

5WK1

Structure of the major capsid protein and the capsid stabilizing protein of the marine siphovirus TW1

• PDB DOI: 10.2210/pdb5WK1/pdb
• EM Map EMD-8854:EMDBEMDataResource

• Classification: VIRUS
• Organism(s): Pseudoalteromonas phage TW1
• Mutation(s): No 


• Deposited: 2017-07-24 Released: 2018-01-17 
• Deposition Author(s): Wang, Z., Rossmann, M.G.
• Funding Organization(s): National Science Foundation (NSF, United States)

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Experimental Data Snapshot

• Method: ELECTRON MICROSCOPY
• Resolution: 3.60 Å
• Aggregation State: PARTICLE 
• Reconstruction Method: SINGLE PARTICLE 

Literature

Structure of the Marine Siphovirus TW1: Evolution of Capsid-Stabilizing Proteins and Tail Spikes.

Wang, Z., Hardies, S.C., Fokine, A., Klose, T., Jiang, W., Cho, B.C., Rossmann, M.G.

(2018) Structure 26: 238-248.e3

• PubMed: 29290487 
• DOI: 10.1016/j.str.2017.12.001
• Primary Citation of Related Structures:  
  5WK1


• PubMed Abstract: 
  

Marine bacteriophage TW1 belongs to the Siphoviridae family and infects Pseudoalteromonas phenolica. Mass spectrometry analysis has identified 16 different proteins in the TW1 virion. Functions of most of these proteins have been predicted by bioinformatic methods. A 3.6 Å resolution cryoelectron microscopy map of the icosahedrally averaged TW1 head showed the atomic structures of the major capsid protein, gp57 ^∗ , and the capsid-stabilizing protein, gp56. The gp57 ^∗ structure is similar to that of the phage HK97 capsid protein. The gp56 protein has two domains, each having folds similar to that of the N-terminal part of phage λ gpD, indicating a common ancestry. The first gp56 domain clamps adjacent capsomers together, whereas the second domain is required for trimerization. A 6-fold-averaged reconstruction of the distal part of the tail showed that TW1 has six tail spikes, which are unusual for siphophages but are similar to the podophages P22 and Sf6, suggesting a common evolutionary origin of these spikes.

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Organizational Affiliation: 

Department of Biological Sciences, Purdue University, West Lafayette, IN 47907, USA. Electronic address: [e-mail].

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Capsid Stabilizing Protein	G [auth K], B [auth L], D [auth M], E [auth S], A [auth X], C [auth Y], F [auth Z]	148	Pseudoalteromonas phage TW1	Mutation(s): 0  Gene Names: TW1_056
UniProt
Find proteins for S5MS27 (Pseudoalteromonas phage TW1) Explore S5MS27  Go to UniProtKB:  S5MS27

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
Major Capsid Protein	H [auth A], I [auth B], J [auth C], K [auth D], L [auth E], M [auth F], N [auth G]	352	Pseudoalteromonas phage TW1	Mutation(s): 0  Gene Names: TW1_057
UniProt
Find proteins for S5M825 (Pseudoalteromonas phage TW1) Explore S5M825  Go to UniProtKB:  S5M825

Experimental Data & Validation

Experimental Data

• Method: ELECTRON MICROSCOPY
• Resolution: 3.60 Å
• Aggregation State: PARTICLE 
• Reconstruction Method: SINGLE PARTICLE 

Structure Validation

Entry History & Funding Information

Deposition Data

• Deposited Date: 2017-07-24 
• Released Date: 2018-01-17 
Deposition Author(s): Wang, Z., Rossmann, M.G.

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Funding Organization	Location	Grant Number
National Science Foundation (NSF, United States)	United States	MCB-1515260

Revision History  

• Version 1.0: 2018-01-17
  Type: Initial release
  
• Version 1.1: 2018-02-21
  Changes: Database references
• Version 1.2: 2019-11-27
  Changes: Author supporting evidence