4O1O

Crystal Structure of RNase L in complex with 2-5A


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.27 Å
  • R-Value Free: 0.289 
  • R-Value Work: 0.230 
  • R-Value Observed: 0.232 

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Literature

Dimeric structure of pseudokinase RNase L bound to 2-5A reveals a basis for interferon-induced antiviral activity.

Huang, H.Zeqiraj, E.Dong, B.Jha, B.K.Duffy, N.M.Orlicky, S.Thevakumaran, N.Talukdar, M.Pillon, M.C.Ceccarelli, D.F.Wan, L.C.Juang, Y.C.Mao, D.Y.Gaughan, C.Brinton, M.A.Perelygin, A.A.Kourinov, I.Guarne, A.Silverman, R.H.Sicheri, F.

(2014) Mol Cell 53: 221-234

  • DOI: 10.1016/j.molcel.2013.12.025
  • Primary Citation of Related Structures:  
    4O1O, 4O1P

  • PubMed Abstract: 
  • RNase L is an ankyrin repeat domain-containing dual endoribonuclease-pseudokinase that is activated by unusual 2,'5'-oligoadenylate (2-5A) second messengers and which impedes viral infections in higher vertebrates. Despite its importance in interferon-regulated antiviral innate immunity, relatively little is known about its precise mechanism of action ...

    RNase L is an ankyrin repeat domain-containing dual endoribonuclease-pseudokinase that is activated by unusual 2,'5'-oligoadenylate (2-5A) second messengers and which impedes viral infections in higher vertebrates. Despite its importance in interferon-regulated antiviral innate immunity, relatively little is known about its precise mechanism of action. Here we present a functional characterization of 2.5 Å and 3.25 Å X-ray crystal and small-angle X-ray scattering structures of RNase L bound to a natural 2-5A activator with and without ADP or the nonhydrolysable ATP mimetic AMP-PNP. These studies reveal how recognition of 2-5A through interactions with the ankyrin repeat domain and the pseudokinase domain, together with nucleotide binding, imposes a rigid intertwined dimer configuration that is essential for RNase catalytic and antiviral functions. The involvement of the pseudokinase domain of RNase L in 2-5A sensing, nucleotide binding, dimerization, and ribonuclease functions highlights the evolutionary adaptability of the eukaryotic protein kinase fold.


    Organizational Affiliation

    Program in Systems Biology, Lunenfeld-Tanenbaum Research Institute, Mount Sinai Hospital, 600 University Avenue, Toronto, ON M5G 1X5, Canada; Department of Molecular Genetics, University of Toronto, Toronto, ON M5S 1A8, Canada; Department of Biochemistry, University of Toronto, Toronto, ON M5S 1A8, Canada. Electronic address: sicheri@lunenfeld.ca.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Ribonuclease LA, B, C, D717Sus scrofaMutation(s): 0 
Gene Names: RNASEL
UniProt
Find proteins for A5H025 (Sus scrofa)
Explore A5H025 
Go to UniProtKB:  A5H025
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupA5H025
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
25L
Query on 25L

Download Ideal Coordinates CCD File 
E [auth A],
F [auth B],
G [auth C],
H [auth D]
[[(2R,3R,4R,5R)-5-(6-aminopurin-9-yl)-4-[[(2R,3R,4R,5R)-5-(6-aminopurin-9-yl)-4-[[(2R,3S,4R,5R)-5-(6-aminopurin-9-yl)-3,4-dihydroxy-oxolan-2-yl]methoxy-hydroxy-phosphoryl]oxy-3-hydroxy-oxolan-2-yl]methoxy-hydroxy-phosphoryl]oxy-3-hydroxy-oxolan-2-yl]methoxy-hydroxy-phosphoryl] phosphono hydrogen phosphate
C30 H40 N15 O25 P5
RTAGLZBJCCVJET-UQTMIEBXSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.27 Å
  • R-Value Free: 0.289 
  • R-Value Work: 0.230 
  • R-Value Observed: 0.232 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 59.792α = 90
b = 111.968β = 90.03
c = 268.465γ = 90
Software Package:
Software NamePurpose
ADSCdata collection
PHASERphasing
REFMACrefinement
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

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Ligand Structure Quality Assessment 



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2014-02-05
    Type: Initial release
  • Version 1.1: 2014-12-24
    Changes: Database references