7S78

Structure of a cell-entry defective human adenovirus provides insights into precursor proteins and capsid maturation

  • Classification: VIRUS
  • Organism(s): Human adenovirus 5
  • Mutation(s): No 

  • Deposited: 2021-09-15 Released: 2021-12-01 
  • Deposition Author(s): Reddy, V.S., Yu, X.
  • Funding Organization(s): National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)

Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.72 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Structure of a Cell Entry Defective Human Adenovirus Provides Insights into Precursor Proteins and Capsid Maturation.

Yu, X.Mullen, T.M.Abrishami, V.Huiskonen, J.T.Nemerow, G.R.Reddy, V.S.

(2021) J Mol Biol 434: 167350-167350

  • DOI: 10.1016/j.jmb.2021.167350
  • Primary Citation of Related Structures:  
    7S78

  • PubMed Abstract: 
  • Maturation of adenoviruses is distinguished by proteolytic processing of several interior minor capsid proteins and core proteins by the adenoviral protease and subsequent reorganization of adenovirus core. We report the results derived from the icosahedrally averaged cryo-EM structure of a cell entry defective form of adenovirus, designated ts1, at a resolution of 3 ...

    Maturation of adenoviruses is distinguished by proteolytic processing of several interior minor capsid proteins and core proteins by the adenoviral protease and subsequent reorganization of adenovirus core. We report the results derived from the icosahedrally averaged cryo-EM structure of a cell entry defective form of adenovirus, designated ts1, at a resolution of 3.7 Å as well as of the localized reconstructions of unique hexons and penton base. The virion structure revealed the structures and organization of precursors of minor capsid proteins, pIIIa, pVI and pVIII, which are closely associated with the hexons on the capsid interior. In addition to a well-ordered helical domain (a.a. 310-397) of pIIIa, highlights of the structure include the precursors of VIII display significantly different structures near the cleavage sites. Moreover, we traced residues 4-96 of the membrane lytic protein (pVI) that includes an amphipathic helix occluded deep in the hexon cavity suggesting the possibility of co-assembly of hexons with the precursors of VI. In addition, we observe a second copy of pVI ordered up to residue L40 in the peripentonal hexons and a few fragments of density corresponding to 2nd and 3rd copies of pVI in other hexons. However, we see no evidence of precursors of VII binding in the hexon cavity. These findings suggest the possibility that differently bound pVI molecules undergo processing at the N-terminal cleavage sites at varying efficiencies, subsequently creating competition between the cleaved and uncleaved forms of VI, followed by reorganization, processing, and release of VI molecules from the hexon cavities.


    Organizational Affiliation

    Department of Integrative Structural and Computational Biology, The Scripps Research Institute, La Jolla, CA 92037, USA. Electronic address: reddyv@scripps.edu.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Hexon protein
A, B, C, D, E, F, G, H, I, J, K, L
A, B, C, D, E, F, G, H, I, J, K, L
952Human adenovirus 5Mutation(s): 0 
Gene Names: L3
UniProt
Find proteins for P04133 (Human adenovirus C serotype 5)
Explore P04133 
Go to UniProtKB:  P04133
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UniProt GroupP04133
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Penton proteinM [auth N]571Human adenovirus 5Mutation(s): 0 
Gene Names: L2
UniProt
Find proteins for P12538 (Human adenovirus C serotype 5)
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Go to UniProtKB:  P12538
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UniProt GroupP12538
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
Pre-hexon-linking protein IIIaN [auth M]585Human adenovirus 5Mutation(s): 0 
Gene Names: L1
UniProt
Find proteins for P12537 (Human adenovirus C serotype 5)
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UniProt GroupP12537
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Entity ID: 4
MoleculeChainsSequence LengthOrganismDetailsImage
Hexon-interlacing proteinO [auth P],
P [auth Q],
Q [auth R],
R [auth S]
140Human adenovirus 5Mutation(s): 0 
Gene Names: IX
UniProt
Find proteins for P03281 (Human adenovirus C serotype 5)
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Go to UniProtKB:  P03281
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UniProt GroupP03281
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Entity ID: 5
MoleculeChainsSequence LengthOrganismDetailsImage
Pre-hexon-linking protein VIIIS [auth U],
T [auth V]
227Human adenovirus 5Mutation(s): 0 
Gene Names: L4
UniProt
Find proteins for P24936 (Human adenovirus C serotype 5)
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UniProt GroupP24936
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Entity ID: 6
MoleculeChainsSequence LengthOrganismDetailsImage
Pre-protein VI250Human adenovirus 5Mutation(s): 0 
Gene Names: L3
UniProt
Find proteins for P24937 (Human adenovirus C serotype 5)
Explore P24937 
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UniProt GroupP24937
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Entity ID: 7
MoleculeChainsSequence LengthOrganismDetailsImage
Unknown-1DA [auth 5]16Human adenovirus 5Mutation(s): 0 
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Entity ID: 8
MoleculeChainsSequence LengthOrganismDetailsImage
Unknown-2EA [auth 6]10Human adenovirus 5Mutation(s): 0 
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Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.72 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

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Entry History & Funding Information

Deposition Data

  • Deposited Date: 2021-09-15 
  • Released Date: 2021-12-01 
  • Deposition Author(s): Reddy, V.S., Yu, X.

Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)United StatesR21 AI146644

Revision History  (Full details and data files)

  • Version 1.0: 2021-12-01
    Type: Initial release
  • Version 1.1: 2021-12-08
    Changes: Database references