1LCM

NMR minimized average structure of microcystin-LR


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Submitted: 
  • Selection Criteria: MINIMIZED AVERAGE 

wwPDB Validation 3D Report Full Report


This is version 1.4 of the entry. See complete history

Literature

Conformational studies of microcystin-LR using NMR spectroscopy and molecular dynamics calculations.

Trogen, G.B.Annila, A.Eriksson, J.Kontteli, M.Meriluoto, J.Sethson, I.Zdunek, J.Edlund, U.

(1996) Biochemistry 35: 3197-3205

  • DOI: 10.1021/bi952368s

  • PubMed Abstract: 
  • NMR spectroscopy in aqueous and dimethyl sulfoxide/water solutions is used to determine the three-dimensional structures of microcystin-LR, a cyclic cyanobacterial heptapeptide toxin which is a potent inhibitor of type 1 and type 2A protein phosphata ...

    NMR spectroscopy in aqueous and dimethyl sulfoxide/water solutions is used to determine the three-dimensional structures of microcystin-LR, a cyclic cyanobacterial heptapeptide toxin which is a potent inhibitor of type 1 and type 2A protein phosphatases. The conformations of this toxic peptide are studied using a simulated annealing (SA) protocol followed by refined SA calculations in vacuo and free MD simulations in water. Only one conformational family in each solvent is found. The peptide ring has a saddle-shaped form, essentially the same in both solvents. The structural difference observed between the two solution structures is located to the part consisting of Mdha, Ala, and Leu. This peptide segment is not present in nodularin, a cyclic pentapeptide of similar toxicity. The Arg side chain is very flexible, while the side chain of Leu is well defined. The side chain of Adda, essential for toxicity, is constrained in the vicinity of the backbone ring but appears to be flexible in the more remote part.


    Related Citations: 
    • Three-Dimensional Structure of the Catalytic Subunit of Protein Serine/Threonine Phosphatase-1
      Goldberg, J.,Huang, H.B.,Kwon, Y.G.,Greengard, P.,Nairn, A.C.,Kuriyan, J.
      (1995) Nature 376: 745
    • Comparison of the Solution Structures of Microcystin-Lr and Motuporin
      Bagu, J.R.,Sonnichsen, F.D.,Williams, D.,Andersen, R.J.,Sykes, B.D.,Holmes, C.F.
      (1995) Nat.Struct.Mol.Biol. 2: 114


    Organizational Affiliation

    Department of Organic Chemistry, Umea University, Sweden.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
microcystin LR
A
7N/AMutation(s): 0 
Protein Feature View is not available: No corresponding UniProt sequence found.
Small Molecules
Biologically Interesting Molecules 1 Unique
IDChainsNameType/Class2D Diagram3D Interactions
PRD_000212
Query on PRD_000212
AMicrocystin LROligopeptide / Toxin

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Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Submitted: 
  • Selection Criteria: MINIMIZED AVERAGE 
Software Package:
Software NamePurpose
X-PLORphasing
X-PLORmodel building
X-PLORrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 1995-12-30 
  • Released Date: 1996-12-07 
  • Deposition Author(s): Trogen, G., Zdunek, J.

Revision History 

  • Version 1.0: 1996-12-07
    Type: Initial release
  • Version 1.1: 2008-03-24
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Database references, Derived calculations, Non-polymer description, Version format compliance
  • Version 1.3: 2012-12-12
    Type: Other
  • Version 1.4: 2013-02-06
    Type: Derived calculations