1MWH | pdb_00001mwh

REOVIRUS POLYMERASE LAMBDA3 BOUND TO MRNA CAP ANALOG

• PDB DOI: https://doi.org/10.2210/pdb1MWH/pdb

• Classification: VIRAL PROTEIN
• Organism(s): Reovirus sp.
• Expression System: Spodoptera frugiperda
• Mutation(s): No 


• Deposited: 2002-09-29 Released: 2002-12-18 
• Deposition Author(s): Tao, Y., Farsetta, D.L., Nibert, M.L., Harrison, S.C.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.50 Å
• R-Value Free: 
  0.245 (Depositor), 0.244 (DCC) 
• R-Value Work: 
  0.209 (Depositor), 0.209 (DCC) 
• R-Value Observed: 
  0.243 (Depositor) 

Starting Model: experimental

Literature

RNA Synthesis in a Cage-Structural Studies of Reovirus Polymerase lambda3

Tao, Y., Farsetta, D.L., Nibert, M.L., Harrison, S.C.

(2002) Cell 111: 733-745

• PubMed: 12464184 
• DOI: https://doi.org/10.1016/s0092-8674(02)01110-8
• Primary Citation Related Structures: 
  1MUK, 1MWH, 1N1H, 1N35, 1N38


• PubMed Abstract: 
  

  The reovirus polymerase and those of other dsRNA viruses function within the confines of a protein capsid to transcribe the tightly packed dsRNA genome segments. The crystal structure of the reovirus polymerase, lambda3, determined at 2.5 A resolution, shows a fingers-palm-thumb core, similar to those of other viral polymerases, surrounded by major N- and C-terminal elaborations, which create a cage-like structure, with four channels leading to the catalytic site. This "caged" polymerase has allowed us to visualize the results of several rounds of RNA polymerization directly in the crystals. A 5' cap binding site on the surface of lambda3 suggests a template retention mechanism by which attachment of the 5' end of the plus-sense strand facilitates insertion of the 3' end of the minus-sense strand into the template channel.

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Organizational Affiliation: 
• Howard Hughes Medical Institute, Department of Molecular and Cellular Biology, Harvard University, Cambridge, MA 02138, USA.

Biological Assembly 1  

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

Biological assembly 1 assigned by authors.

Macromolecule Content 

• Total Structure Weight: 143.28 kDa 
• Atom Count: 10,653 
• Modeled Residue Count: 1,256 
• Deposited Residue Count: 1,267 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
MINOR CORE PROTEIN LAMBDA 3	A	1,267	Reovirus sp.	Mutation(s): 0  Gene Names: L1 EC: 2.7.7.48
UniProt
Find proteins for P0CK31 (Reovirus type 3 (strain Dearing)) Explore P0CK31  Go to UniProtKB:  P0CK31

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
GTG	C [auth A]	7-METHYL-GUANOSINE-5'-TRIPHOSPHATE-5'-GUANOSINE C21 H30 N10 O18 P3 FHHZHGZBHYYWTG-INFSMZHSSA-O
MN	B [auth A]	MANGANESE (II) ION Mn WAEMQWOKJMHJLA-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.50 Å
• R-Value Free:  0.245 (Depositor), 0.244 (DCC) 
• R-Value Work:  0.209 (Depositor), 0.209 (DCC) 
• R-Value Observed: 0.243 (Depositor) 

Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 70.891	α = 90
b = 84.944	β = 90
c = 249.246	γ = 90

Software Package:

Software Name	Purpose
CNS	refinement
DENZO	data reduction
SCALEPACK	data scaling
CNS	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 2002-12-18 
Deposition Author(s): Tao, Y., Farsetta, D.L., Nibert, M.L., Harrison, S.C.

Revision History  

• Version 1.0: 2002-12-18
  Type: Initial release
  
• Version 1.1: 2008-04-28
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2024-02-14
  Changes: Data collection, Database references, Derived calculations, Refinement description