5ZBK

Crystal structure of type-I LOG from Pseudomonas aeruginosa PAO1 in complex with AMP


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.30 Å
  • R-Value Free: 0.238 
  • R-Value Work: 0.182 
  • R-Value Observed: 0.185 

wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

Structural insight into molecular mechanism of cytokinin activating protein from Pseudomonas aeruginosa PAO1.

Seo, H.Kim, K.J.

(2018) Environ Microbiol 20: 3214-3223

  • DOI: 10.1111/1462-2920.14287
  • Primary Citation of Related Structures:  
    5ZBJ, 5ZBK, 5ZBL

  • PubMed Abstract: 
  • Cytokinin (CK)-activating enzyme, called LOG, is a phosphoribohydrolase that hydrolyzes nucleotides into nucleobases and phosphoriboses. This reaction is a fascinating target for regulation of cellular active CK. However, misannotation of LOG as a lysine decarboxylase and the lack of detailed catalytic and substrate-binding mechanisms have prevented studies of LOG at a protein-level ...

    Cytokinin (CK)-activating enzyme, called LOG, is a phosphoribohydrolase that hydrolyzes nucleotides into nucleobases and phosphoriboses. This reaction is a fascinating target for regulation of cellular active CK. However, misannotation of LOG as a lysine decarboxylase and the lack of detailed catalytic and substrate-binding mechanisms have prevented studies of LOG at a protein-level. In this study, we determined the crystal structure of PA4923 from Pseudomonas aeruginosa PAO1. The overall structure of PA4923 resembles those of type-I LOGs, and it exhibited phosphoribohydrolase activity against AMP. These observations indicated that PA4923 functions as an LOG. We also determined the PaLOG structure in complex with AMP and elucidated the detailed binding mode of LOG against the AMP substrate. Interestingly, PaLOG undergoes an open/closed conformational change upon binding AMP, during which the Glu74 residue located on the β3-β4 connecting loop flips 180° and moves 13 Å towards the AMP molecule. Structural and amino acid sequence comparisons of LOGs suggest that this conformational change upon substrate binding might be a common phenomenon in LOGs. In addition, based on our structural studies and the reported catalytic mechanism of nucleoside hydrolases, we proposed a catalytic mechanism for LOG in which an oxocarbenium ion-like transition state is formed.


    Organizational Affiliation

    KNU Institute for Microorganisms, Kyungpook National University, Daegu, 41566, Republic of Korea.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Putative cytokinin riboside 5'-monophosphate phosphoribohydrolaseA203Pseudomonas aeruginosa PAO1Mutation(s): 1 
Gene Names: PA4923
EC: 3.2.2 (PDB Primary Data), 3.2.2.4 (UniProt)
UniProt
Find proteins for P48636 (Pseudomonas aeruginosa (strain ATCC 15692 / DSM 22644 / CIP 104116 / JCM 14847 / LMG 12228 / 1C / PRS 101 / PAO1))
Explore P48636 
Go to UniProtKB:  P48636
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP48636
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
AMP (Subject of Investigation/LOI)
Query on AMP

Download Ideal Coordinates CCD File 
E [auth A]ADENOSINE MONOPHOSPHATE
C10 H14 N5 O7 P
UDMBCSSLTHHNCD-KQYNXXCUSA-N
 Ligand Interaction
GOL
Query on GOL

Download Ideal Coordinates CCD File 
B [auth A],
C [auth A]
GLYCEROL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
EDO
Query on EDO

Download Ideal Coordinates CCD File 
D [auth A]1,2-ETHANEDIOL
C2 H6 O2
LYCAIKOWRPUZTN-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.30 Å
  • R-Value Free: 0.238 
  • R-Value Work: 0.182 
  • R-Value Observed: 0.185 
  • Space Group: C 2 2 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 64.844α = 90
b = 97.524β = 90
c = 71.788γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
PDB_EXTRACTdata extraction
HKL-2000data scaling
MOLREPphasing

Structure Validation

View Full Validation Report




Entry History 

Deposition Data

  • Deposited Date: 2018-02-12 
  • Released Date: 2018-06-27 
  • Deposition Author(s): Seo, H., Kim, K.-J.

Revision History  (Full details and data files)

  • Version 1.0: 2018-06-27
    Type: Initial release
  • Version 1.1: 2018-10-17
    Changes: Data collection, Database references
  • Version 1.2: 2019-10-16
    Changes: Data collection
  • Version 1.3: 2020-09-16
    Changes: Structure summary