Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

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

Macromolecule Content

• Total Structure Weight: 271 kDa 
• Atom Count: 14,163 
• Modelled Residue Count: 1,681 
• Deposited Residue Count: 2,288 
• Unique protein chains: 1
• Unique nucleic acid chains: 2

 5AMR

Structure of the La Crosse Bunyavirus polymerase in complex with the 3' viral RNA

• PDB DOI: 10.2210/pdb5AMR/pdb
• NDB: NA3367

• Classification: HYDROLASE
• Organism(s): La Crosse virus
• Expression System: Trichoplusia ni
• Mutation(s): No 


• Deposited: 2015-03-12 Released: 2015-06-03 
• Deposition Author(s): Reguera, J., Gerlach, P., Cusack, S.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.57 Å
• R-Value Free: 0.252 
• R-Value Work: 0.204 
• R-Value Observed: 0.206 

Literature

Structural Insights Into Bunyavirus Replication and its Regulation by the Vrna Promoter.

Gerlach, P., Malet, H., Cusack, S., Reguera, J.

(2015) Cell 161: 1267

• PubMed: 26004069 
• DOI: 10.1016/j.cell.2015.05.006
• Primary Citation of Related Structures:  
  5AMQ, 5AMR


• PubMed Abstract: 
  

Segmented negative-strand RNA virus (sNSV) polymerases transcribe and replicate the viral RNA (vRNA) within a ribonucleoprotein particle (RNP). We present cryo-EM and X-ray structures of, respectively, apo- and vRNA bound La Crosse orthobunyavirus (LACV) polymerase that give atomic-resolution insight into how such RNPs perform RNA synthesis. The complementary 3' and 5' vRNA extremities are sequence specifically bound in separate sites on the polymerase. The 5' end binds as a stem-loop, allosterically structuring functionally important polymerase active site loops. Identification of distinct template and product exit tunnels allows proposal of a detailed model for template-directed replication with minimal disruption to the circularised RNP. The similar overall architecture and vRNA binding of monomeric LACV to heterotrimeric influenza polymerase, despite high sequence divergence, suggests that all sNSV polymerases have a common evolutionary origin and mechanism of RNA synthesis. These results will aid development of replication inhibitors of diverse, serious human pathogenic viruses.

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Organizational Affiliation: 

European Molecular Biology Laboratory, Grenoble Outstation, 71 Avenue des Martyrs, CS90181, 38042 Grenoble Cedex 9, France; Unit of Virus Host-Cell Interactions (UMI 3265), University Grenoble Alpes-EMBL-CNRS, 71 Avenue des Martyrs, CS90181, 38042 Grenoble Cedex 9, France. Electronic address: [e-mail].

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
RNA POLYMERASE L	A	2,264	La Crosse virus	Mutation(s): 0  Gene Names: L EC: 2.7.7.48 (PDB Primary Data), 3.1 (UniProt)
UniProt
Find proteins for A5HC98 (Bunyavirus La Crosse) Explore A5HC98  Go to UniProtKB:  A5HC98

Entity ID: 2
Molecule	Chains	Length	Organism	Image
RNA	B	16	La Crosse virus

Entity ID: 3
Molecule	Chains	Length	Organism	Image
RNA	C	8	La Crosse virus

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.57 Å
• R-Value Free: 0.252 
• R-Value Work: 0.204 
• R-Value Observed: 0.206 
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 102	α = 90
b = 140.7	β = 90
c = 162.4	γ = 90

Software Package:

Software Name	Purpose
PHENIX	refinement
XDS	data reduction
XSCALE	data scaling
SHARP	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 2015-06-03 
Deposition Author(s): Reguera, J., Gerlach, P., Cusack, S.

Revision History  

• Version 1.0: 2015-06-03
  Type: Initial release
  
• Version 1.1: 2015-06-17
  Changes: Database references
• Version 1.2: 2019-04-03
  Changes: Data collection, Other, Source and taxonomy