7EYB

core proteins


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.70 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation   3D Report Full Report


This is version 1.0 of the entry. See complete history


Literature

Structural changes in bacteriophage T7 upon receptor-induced genome ejection.

Chen, W.Xiao, H.Wang, L.Wang, X.Tan, Z.Han, Z.Li, X.Yang, F.Liu, Z.Song, J.Liu, H.Cheng, L.

(2021) Proc Natl Acad Sci U S A 118

  • DOI: 10.1073/pnas.2102003118
  • Primary Citation of Related Structures:  
    7EY6, 7EY7, 7EY8, 7EY9, 7EYB

  • PubMed Abstract: 
  • Many tailed bacteriophages assemble ejection proteins and a portal-tail complex at a unique vertex of the capsid. The ejection proteins form a transenvelope channel extending the portal-tail channel for the delivery of genomic DNA in cell infection. Here, we report the structure of the mature bacteriophage T7, including the ejection proteins, as well as the structures of the full and empty T7 particles in complex with their cell receptor lipopolysaccharide ...

    Many tailed bacteriophages assemble ejection proteins and a portal-tail complex at a unique vertex of the capsid. The ejection proteins form a transenvelope channel extending the portal-tail channel for the delivery of genomic DNA in cell infection. Here, we report the structure of the mature bacteriophage T7, including the ejection proteins, as well as the structures of the full and empty T7 particles in complex with their cell receptor lipopolysaccharide. Our near-atomic-resolution reconstruction shows that the ejection proteins in the mature T7 assemble into a core, which comprises a fourfold gene product 16 (gp16) ring, an eightfold gp15 ring, and a putative eightfold gp14 ring. The gp15 and gp16 are mainly composed of helix bundles, and gp16 harbors a lytic transglycosylase domain for degrading the bacterial peptidoglycan layer. When interacting with the lipopolysaccharide, the T7 tail nozzle opens. Six copies of gp14 anchor to the tail nozzle, extending the nozzle across the lipopolysaccharide lipid bilayer. The structures of gp15 and gp16 in the mature T7 suggest that they should undergo remarkable conformational changes to form the transenvelope channel. Hydrophobic α-helices were observed in gp16 but not in gp15, suggesting that gp15 forms the channel in the hydrophilic periplasm and gp16 forms the channel in the cytoplasmic membrane.


    Organizational Affiliation

    Technology Center for Protein Sciences, School of Life Sciences, Tsinghua University, Beijing 100084, China.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Internal virion protein gp14196Escherichia phage T7Mutation(s): 0 
Gene Names: 14
UniProt
Find proteins for P03724 (Escherichia phage T7)
Explore P03724 
Go to UniProtKB:  P03724
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP03724
Protein Feature View
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Internal virion protein gp15747Escherichia phage T7Mutation(s): 0 
Gene Names: 15
UniProt
Find proteins for P03725 (Escherichia phage T7)
Explore P03725 
Go to UniProtKB:  P03725
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UniProt GroupP03725
Protein Feature View
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  • Reference Sequence
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
Peptidoglycan transglycosylase gp16Q [auth I],
R [auth J],
S [auth K],
T [auth L]
1,318Escherichia phage T7Mutation(s): 0 
Gene Names: 16
EC: 4.2.2
UniProt
Find proteins for P03726 (Escherichia phage T7)
Explore P03726 
Go to UniProtKB:  P03726
Entity Groups  
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UniProt GroupP03726
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.70 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

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Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Natural Science Foundation of China (NSFC)China12034006
National Natural Science Foundation of China (NSFC)China31971122
National Natural Science Foundation of China (NSFC)China32071209

Revision History  (Full details and data files)

  • Version 1.0: 2021-09-22
    Type: Initial release