4O8J

Crystal structure of RtcA, the RNA 3'-terminal phosphate cyclase from Pyrococcus horikoshii, in complex with rACAAA3'phosphate and adenine.


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.04 Å
  • R-Value Free: 0.198 
  • R-Value Work: 0.159 
  • R-Value Observed: 0.160 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Structure of RNA 3'-phosphate cyclase bound to substrate RNA.

Desai, K.K.Bingman, C.A.Cheng, C.L.Phillips, G.N.Raines, R.T.

(2014) RNA 20: 1560-1566

  • DOI: 10.1261/rna.045823.114
  • Primary Citation of Related Structures:  
    4O89, 4O8J

  • PubMed Abstract: 
  • RNA 3'-phosphate cyclase (RtcA) catalyzes the ATP-dependent cyclization of a 3'-phosphate to form a 2',3'-cyclic phosphate at RNA termini. Cyclization proceeds through RtcA-AMP and RNA(3')pp(5')A covalent intermediates, which are analogous to interme ...

    RNA 3'-phosphate cyclase (RtcA) catalyzes the ATP-dependent cyclization of a 3'-phosphate to form a 2',3'-cyclic phosphate at RNA termini. Cyclization proceeds through RtcA-AMP and RNA(3')pp(5')A covalent intermediates, which are analogous to intermediates formed during catalysis by the tRNA ligase RtcB. Here we present a crystal structure of Pyrococcus horikoshii RtcA in complex with a 3'-phosphate terminated RNA and adenosine in the AMP-binding pocket. Our data reveal that RtcA recognizes substrate RNA by ensuring that the terminal 3'-phosphate makes a large contribution to RNA binding. Furthermore, the RNA 3'-phosphate is poised for in-line attack on the P-N bond that links the phosphorous atom of AMP to N(ε) of His307. Thus, we provide the first insights into RNA 3'-phosphate termini recognition and the mechanism of 3'-phosphate activation by an Rtc enzyme.


    Organizational Affiliation

    Department of Biochemistry, University of Wisconsin-Madison, Madison, Wisconsin 53706, USA Department of Chemistry, University of Wisconsin-Madison, Madison, Wisconsin 53706, USA rtraines@wisc.edu.



Macromolecules

Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
RNA 3'-terminal phosphate cyclaseA, B341Pyrococcus horikoshii OT3Mutation(s): 0 
Gene Names: PH1529PHCV028rtcA
EC: 6.5.1.4
Find proteins for O59198 (Pyrococcus horikoshii (strain ATCC 700860 / DSM 12428 / JCM 9974 / NBRC 100139 / OT-3))
Explore O59198 
Go to UniProtKB:  O59198
Protein Feature View
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  • Reference Sequence
  • Find similar nucleic acids by:  Sequence   |   Structure
  • Entity ID: 2
    MoleculeChainsLengthOrganismImage
    RNAD, E6N/A
    Small Molecules
    Ligands 2 Unique
    IDChainsName / Formula / InChI Key2D Diagram3D Interactions
    ADN
    Query on ADN

    Download CCD File 
    A, B
    ADENOSINE
    C10 H13 N5 O4
    OIRDTQYFTABQOQ-KQYNXXCUSA-N
     Ligand Interaction
    EPE
    Query on EPE

    Download CCD File 
    B
    4-(2-HYDROXYETHYL)-1-PIPERAZINE ETHANESULFONIC ACID
    C8 H18 N2 O4 S
    JKMHFZQWWAIEOD-UHFFFAOYSA-N
     Ligand Interaction
    Experimental Data & Validation

    Experimental Data

    • Method: X-RAY DIFFRACTION
    • Resolution: 2.04 Å
    • R-Value Free: 0.198 
    • R-Value Work: 0.159 
    • R-Value Observed: 0.160 
    • Space Group: P 21 21 21
    Unit Cell:
    Length ( Å )Angle ( ˚ )
    a = 83.921α = 90
    b = 110.261β = 90
    c = 127.648γ = 90
    Software Package:
    Software NamePurpose
    MAR345dtbdata collection
    PHASERphasing
    PHENIXrefinement
    HKL-2000data reduction
    HKL-2000data scaling

    Structure Validation

    View Full Validation Report



    Entry History 

    Deposition Data

    Revision History 

    • Version 1.0: 2014-09-10
      Type: Initial release
    • Version 1.1: 2014-10-01
      Changes: Database references
    • Version 1.2: 2017-11-29
      Changes: Database references