1AF8

ACTINORHODIN POLYKETIDE SYNTHASE ACYL CARRIER PROTEIN FROM STREPTOMYCES COELICOLOR A3(2), NMR, 24 STRUCTURES


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 30 
  • Conformers Submitted: 24 
  • Selection Criteria: FEWEST RESTRAINT VIOLATIONS 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Solution structure of the actinorhodin polyketide synthase acyl carrier protein from Streptomyces coelicolor A3(2).

Crump, M.P.Crosby, J.Dempsey, C.E.Parkinson, J.A.Murray, M.Hopwood, D.A.Simpson, T.J.

(1997) Biochemistry 36: 6000-6008

  • DOI: 10.1021/bi970006+
  • Primary Citation of Related Structures:  
    1AF8, 2AF8

  • PubMed Abstract: 
  • The solution structure of the actinorhodin acyl carrier protein (act apo-ACP) from the polyketide synthase (PKS) of Streptomyces coelicolor A3(2) has been determined using 1H NMR spectroscopy, representing the first polyketide synthase component for which detailed structural information has been obtained ...

    The solution structure of the actinorhodin acyl carrier protein (act apo-ACP) from the polyketide synthase (PKS) of Streptomyces coelicolor A3(2) has been determined using 1H NMR spectroscopy, representing the first polyketide synthase component for which detailed structural information has been obtained. Twenty-four structures were generated by simulated annealing, employing 699 distance restraints and 94 dihedral angle restraints. The structure is composed, principally, of three major helices (1, 2, and 4), a shorter helix (3) and a large loop region separating helices 1 and 2. The structure is well-defined, except for a portion of the loop region (residues 18-29), the N-terminus (1-4), and a short stretch (57-61) in the loop connecting helices 2 and 3. The RMS distribution of the 24 structures about the average structure is 1.47 A for backbone atoms, 1.84 A for all heavy atoms (residues 5-86), and 1.01 A for backbone atoms over the helical regions (5-18, 41-86). The tertiary fold of act apo-ACP shows a strong structural homology with Escherichia coli fatty acid synthase (FAS) ACP, though some structural differences exist. First, there is no evidence that act apo-ACP is conformationally averaged between two or more states as observed in E. coli FAS ACP. Second, act apo-ACP shows a disordered N-terminus (residues 1-4) and a longer flexible loop (19-41 with 19-29 disordered) as opposed to E. coli FAS ACP where the N-terminal helix starts at residue 3 and the loop region is three amino acids shorter (16-35). Most importantly, however, although the act apo-ACP structure contains a hydrophobic core, there are in addition a number of buried hydrophilic groups, principally Arg72 and Asn79, both of which are 100% conserved in the PKS ACPs and not the FAS ACPs and may therefore play a role in stabilizing the growing polyketide chain. The structure-function relationship of act ACP is discussed in the light of these structural data and recent genetic advances in the field.


    Organizational Affiliation

    School of Chemistry, University of Bristol Molecular Recognition Centre, University of Bristol, U.K.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
ACTINORHODIN POLYKETIDE SYNTHASE ACYL CARRIER PROTEINA86Streptomyces coelicolor A3(2)Mutation(s): 0 
Gene Names: ACTINORHODIN ACYL CARRIER PROTEINSCO5089SCBAC28G1.15
UniProt
Find proteins for Q02054 (Streptomyces coelicolor (strain ATCC BAA-471 / A3(2) / M145))
Explore Q02054 
Go to UniProtKB:  Q02054
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 30 
  • Conformers Submitted: 24 
  • Selection Criteria: FEWEST RESTRAINT VIOLATIONS 
  • OLDERADO: 1AF8 Olderado

Structure Validation

View Full Validation Report




Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 1997-09-26
    Type: Initial release
  • Version 1.1: 2008-03-24
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Source and taxonomy, Version format compliance