1GPF

CHITINASE B FROM SERRATIA MARCESCENS IN COMPLEX WITH INHIBITOR PSAMMAPLIN


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.85 Å
  • R-Value Free: 0.245 
  • R-Value Work: 0.200 
  • R-Value Observed: 0.200 

wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

Psammaplin A, a Chitinase Inhibitor Isolated from the Fijian Marine Sponge Aplysinella Rhax

Tabudravu, J.N.Eijsink, V.G.Gooday, G.W.Jaspars, M.Komander, D.Legg, M.Synstad, B.Van Aalten, D.M.

(2002) Bioorg Med Chem 10: 1123

  • DOI: 10.1016/s0968-0896(01)00372-8
  • Primary Citation of Related Structures:  
    1GPF

  • PubMed Abstract: 
  • Several brominated tyrosine derived compounds, psammaplins A (1), K (2) and L (3) as well as bisaprasin (4) were isolated from the Fijian marine sponge Aplysinella rhax during a bioassay guided isolation protocol. Their structures were determined using NMR and MS techniques ...

    Several brominated tyrosine derived compounds, psammaplins A (1), K (2) and L (3) as well as bisaprasin (4) were isolated from the Fijian marine sponge Aplysinella rhax during a bioassay guided isolation protocol. Their structures were determined using NMR and MS techniques. Psammaplin A was found to moderately inhibit chitinase B from Serratia marcescens, the mode of inhibition being non-competitive. Crystallographic studies suggest that a disordered psammaplin A molecule is bound near the active site. Interestingly, psammaplin A was found to be a potent antifungal agent.


    Organizational Affiliation

    Marine Natural Products Laboratory, Department of Chemistry, University of Aberdeen, Old Aberdeen AB24 3UE, Scotland, UK.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
CHITINASE B AB499Serratia marcescensMutation(s): 0 
Gene Names: chiBG5643_04810
EC: 3.2.1.14
Find proteins for Q54276 (Serratia marcescens)
Explore Q54276 
Go to UniProtKB:  Q54276
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download Ideal Coordinates CCD File 
A, B
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.85 Å
  • R-Value Free: 0.245 
  • R-Value Work: 0.200 
  • R-Value Observed: 0.200 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 55.754α = 90
b = 103.588β = 90
c = 186.065γ = 90
Software Package:
Software NamePurpose
CNSrefinement
DENZOdata reduction
SCALEPACKdata scaling
CNSphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2002-10-31
    Type: Initial release
  • Version 1.1: 2011-05-08
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2019-10-09
    Changes: Advisory, Data collection, Experimental preparation, Other