7NOA

Structure of the mature RSV CA lattice: Group II, hexamer-hexamer interface, class 6


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 6.40 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SUBTOMOGRAM AVERAGING 

Starting Model: experimental
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This is version 1.2 of the entry. See complete history


Literature

Structure of the mature Rous sarcoma virus lattice reveals a role for IP6 in the formation of the capsid hexamer.

Obr, M.Ricana, C.L.Nikulin, N.Feathers, J.R.Klanschnig, M.Thader, A.Johnson, M.C.Vogt, V.M.Schur, F.K.M.Dick, R.A.

(2021) Nat Commun 12: 3226-3226

  • DOI: https://doi.org/10.1038/s41467-021-23506-0
  • Primary Citation of Related Structures:  
    7NO0, 7NO1, 7NO2, 7NO3, 7NO4, 7NO5, 7NO6, 7NO7, 7NO8, 7NO9, 7NOA, 7NOB, 7NOC, 7NOD, 7NOE, 7NOF, 7NOG, 7NOH, 7NOI, 7NOJ, 7NOK, 7NOL, 7NOM, 7NON, 7NOO, 7NOP, 7NOQ

  • PubMed Abstract: 

    Inositol hexakisphosphate (IP6) is an assembly cofactor for HIV-1. We report here that IP6 is also used for assembly of Rous sarcoma virus (RSV), a retrovirus from a different genus. IP6 is ~100-fold more potent at promoting RSV mature capsid protein (CA) assembly than observed for HIV-1 and removal of IP6 in cells reduces infectivity by 100-fold. Here, visualized by cryo-electron tomography and subtomogram averaging, mature capsid-like particles show an IP6-like density in the CA hexamer, coordinated by rings of six lysines and six arginines. Phosphate and IP6 have opposing effects on CA in vitro assembly, inducing formation of T = 1 icosahedrons and tubes, respectively, implying that phosphate promotes pentamer and IP6 hexamer formation. Subtomogram averaging and classification optimized for analysis of pleomorphic retrovirus particles reveal that the heterogeneity of mature RSV CA polyhedrons results from an unexpected, intrinsic CA hexamer flexibility. In contrast, the CA pentamer forms rigid units organizing the local architecture. These different features of hexamers and pentamers determine the structural mechanism to form CA polyhedrons of variable shape in mature RSV particles.


  • Organizational Affiliation

    Institute of Science and Technology (IST) Austria, Klosterneuburg, Austria.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Capsid protein p27, alternate cleaved 1
A, B, C, D, E
A, B, C, D, E, F, G, H, I, J
229Rous sarcoma virus - Prague CMutation(s): 0 
Gene Names: gag
UniProt
Find proteins for P03354 (Rous sarcoma virus subgroup C (strain Prague))
Explore P03354 
Go to UniProtKB:  P03354
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP03354
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 6.40 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SUBTOMOGRAM AVERAGING 
EM Software:
TaskSoftware PackageVersion
RECONSTRUCTIONDynamo1.1.333

Structure Validation

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Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Austrian Science FundAustriaP31445
National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)United StatesR01AI147890
National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)United StatesR01AI150454
National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)United StatesR35GM136258
European Union (EU)European UnionHorizon 2020, iNEXT (PID4246) , Grant number 653706

Revision History  (Full details and data files)

  • Version 1.0: 2021-04-21
    Type: Initial release
  • Version 1.1: 2021-06-09
    Changes: Database references
  • Version 1.2: 2024-07-10
    Changes: Data collection, Database references, Refinement description