2G0L

Solution Structure of Neocarzinostatin Apo-Protein with bound Flavone

• PDB DOI: https://doi.org/10.2210/pdb2G0L/pdb
• BMRB: 6888

• Classification: ANTIBIOTIC
• Organism(s): Streptomyces carzinostaticus
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2006-02-13 Released: 2006-03-28 
• Deposition Author(s): Muskett, F.W., Stoneman, R.G., Caddick, S., Woolfson, D.N.

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Experimental Data Snapshot

• Method: SOLUTION NMR
• Conformers Calculated: 100 
• Conformers Submitted: 58 
• Selection Criteria: structures with the lowest energy 

Literature

Synthetic Ligands for Apo-Neocarzinostatin

Caddick, S., Muskett, F.W., Stoneman, R.G., Woolfson, D.N.

(2006) J Am Chem Soc 128: 4204-4205

• PubMed: 16568976 
• DOI: https://doi.org/10.1021/ja058419i
• Primary Citation of Related Structures:  
  2G0K, 2G0L


• PubMed Abstract: 
  

  Neocarzinostatin (NCS) is a 1:1 complex of an enediyne chromophore (NCSChrom), non-covalently bound to an 11 kDa protein (apoNCS). We are exploring apoNCS as a generic protein system for sequestering small molecules for therapeutic applications. Here, we disclose a new flavone ligand 1 for apoNCS and present a high-resolution NMR structure of this ligand bound to apoNCS. This is the first high-resolution structure of a completely non-cognate ligand bound to the apoNCS protein. This work provides unambiguous evidence that a completely new class of ligand can bind specifically to apoNCS. Furthermore, the mode of binding is different than that of the naphthoate-based ligands, and for such a simple hydrophobic compound, the new ligand surprisingly binds specifically. This work indicates that apo-Neocarzinostatin has multiple selective and distinct binding modes for small-molecule cargo.

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Organizational Affiliation: 

Department of Chemistry, University College London, UK. [e-mail]

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 12.45 kDa 
• Atom Count: 795 
• Modelled Residue Count: 113 
• Deposited Residue Count: 122 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
NEOCARZINOSTATIN	A	122	Streptomyces carzinostaticus	Mutation(s): 0  Gene Names: ncsA
UniProt
Find proteins for P0A3R9 (Streptomyces carzinostaticus) Explore P0A3R9  Go to UniProtKB:  P0A3R9

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
FLN	B [auth A]	2-PHENYL-4H-CHROMEN-4-ONE C15 H10 O2 VHBFFQKBGNRLFZ-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: SOLUTION NMR
• Conformers Calculated: 100 
• Conformers Submitted: 58 
• Selection Criteria: structures with the lowest energy 

Structure Validation

Entry History 

Deposition Data

• Released Date: 2006-03-28 
Deposition Author(s): Muskett, F.W., Stoneman, R.G., Caddick, S., Woolfson, D.N.

Revision History  

• Version 1.0: 2006-03-28
  Type: Initial release
  
• Version 1.1: 2008-05-01
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2022-03-09
  Changes: Data collection, Database references, Derived calculations