2Q6K

SalL with adenosine


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.55 Å
  • R-Value Free: 0.213 
  • R-Value Work: 0.202 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Discovery and characterization of a marine bacterial SAM-dependent chlorinase

Eustaquio, A.S.Pojer, F.Noel, J.P.Moore, B.S.

(2008) Nat.Chem.Biol. 4: 69-74

  • DOI: 10.1038/nchembio.2007.56
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Halogen atom incorporation into a scaffold of bioactive compounds often amplifies biological activity, as is the case for the anticancer agent salinosporamide A (1), a chlorinated natural product from the marine bacterium Salinispora tropica. Signifi ...

    Halogen atom incorporation into a scaffold of bioactive compounds often amplifies biological activity, as is the case for the anticancer agent salinosporamide A (1), a chlorinated natural product from the marine bacterium Salinispora tropica. Significant effort in understanding enzymatic chlorination shows that oxidative routes predominate to form reactive electrophilic or radical chlorine species. Here we report the genetic, biochemical and structural characterization of the chlorinase SalL, which halogenates S-adenosyl-L-methionine (2) with chloride to generate 5'-chloro-5'-deoxyadenosine (3) and L-methionine (4) in a rarely observed nucleophilic substitution strategy analogous to that of Streptomyces cattleya fluorinase. Further metabolic tailoring produces a halogenated polyketide synthase substrate specific for salinosporamide A biosynthesis. SalL also accepts bromide and iodide as substrates, but not fluoride. High-resolution crystal structures of SalL and active site mutants complexed with substrates and products support the S(N)2 nucleophilic substitution mechanism and further illuminate halide specificity in this newly discovered halogenase family.


    Organizational Affiliation

    Center for Marine Biotechnology and Biomedicine, Scripps Institution of Oceanography, University of California San Diego, 9500 Gilman Drive, La Jolla, California 92093, USA. bsmoore@ucsd.edu




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
chlorinase
A
283Salinispora tropica (strain ATCC BAA-916 / DSM 44818 / CNB-440)Mutation(s): 0 
Gene Names: salL
EC: 2.5.1.94
Find proteins for A4X3Q0 (Salinispora tropica (strain ATCC BAA-916 / DSM 44818 / CNB-440))
Go to UniProtKB:  A4X3Q0
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ADN
Query on ADN

Download SDF File 
Download CCD File 
A
ADENOSINE
C10 H13 N5 O4
OIRDTQYFTABQOQ-KQYNXXCUSA-N
 Ligand Interaction
PEG
Query on PEG

Download SDF File 
Download CCD File 
A
DI(HYDROXYETHYL)ETHER
C4 H10 O3
MTHSVFCYNBDYFN-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.55 Å
  • R-Value Free: 0.213 
  • R-Value Work: 0.202 
  • Space Group: P 63 2 2
Unit Cell:
Length (Å)Angle (°)
a = 111.210α = 90.00
b = 111.210β = 90.00
c = 93.180γ = 120.00
Software Package:
Software NamePurpose
XDSdata reduction
XDSdata scaling
PHASERphasing
REFMACrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 2007-06-05 
  • Released Date: 2007-12-11 
  • Deposition Author(s): Pojer, F., Noel, J.P.

Revision History 

  • Version 1.0: 2007-12-11
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Derived calculations, Source and taxonomy, Version format compliance