1ERP

NUCLEAR MAGNETIC RESONANCE SOLUTION STRUCTURE OF THE PHEROMONE ER-10 FROM THE CILIATED PROTOZOAN EUPLOTES RAIKOVI


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Submitted: 20 

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This is version 1.2 of the entry. See complete history


Literature

Nuclear magnetic resonance solution structure of the pheromone Er-10 from the ciliated protozoan Euplotes raikovi.

Brown, L.R.Mronga, S.Bradshaw, R.A.Ortenzi, C.Luporini, P.Wuthrich, K.

(1993) J Mol Biol 231: 800-816

  • DOI: 10.1006/jmbi.1993.1327
  • Primary Citation of Related Structures:  
    1ERP

  • PubMed Abstract: 
  • The three-dimensional structure in solution of the pheromone Er-10 from the ciliated protozoan Euplotes raikovi has been determined by nuclear magnetic resonance spectroscopy. The structure of this 38-residue protein was obtained from 384 nuclear Overhauser enhancement distance constraints and 78 dihedral angle constraints using the distance geometry program DIANA for the structure calculation and the program AMBER for energy minimization ...

    The three-dimensional structure in solution of the pheromone Er-10 from the ciliated protozoan Euplotes raikovi has been determined by nuclear magnetic resonance spectroscopy. The structure of this 38-residue protein was obtained from 384 nuclear Overhauser enhancement distance constraints and 78 dihedral angle constraints using the distance geometry program DIANA for the structure calculation and the program AMBER for energy minimization. For a group of 20 conformers used to characterize the solution conformation, the average root-mean-square distance calculated for the backbone heavy atoms relative to the mean structure was 0.33 A. The structure includes three short helices of residues 2 to 8, 12 to 19 and 24 to 33, and a turn in the carboxy-terminal region of residues 34 to 38. These structural elements are held together by three disulfide bridges. The structure is quite stable relative to heat denaturation, since at both pH 4.6 and pH 6.0 only minor changes in the circular dichroism and nuclear magnetic resonance spectra were observed over the temperature range 20 to 80 degrees C. The surface of the Er-10 structure shows an asymmetric charge distribution that results in a predominantly apolar surface on one side of the molecule. There is also a deep cleft in the structure with an asymmetric distribution of charged and apolar residues on the two walls. These surface features may be important for the homologous (autocrine) and heterologous binding of the pheromone to receptors.


    Related Citations: 
    • Primary Structure of Euplotes Raikovi Pheromones: Comparison of Five Sequences of Pheromones with Variable Mating Interactions
      Raffioni, S., Miceli, C., Vallesi, A., Chowdhury, S.K., Chait, B.T., Luporini, P., Bradshaw, R.A.
      (1992) Proc Natl Acad Sci U S A 89: 2071
    • Purification, Characterization and Amino Acid Sequence of the Mating Pheromone Er-10 of the Ciliate Euplotes Raikovi
      Raffioni, S., Luporini, P., Bradshaw, R.A.
      (1989) Biochemistry 28: 5250

    Organizational Affiliation

    Institut für Molekularbiologie und Biophysik, Eidgenössische Technische Hochschule, Zürich, Switzerland.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
PHEROMONE ER-10A38Euplotes raikoviMutation(s): 0 
Gene Names: MAT10
UniProt
Find proteins for P12350 (Euplotes raikovi)
Explore P12350 
Go to UniProtKB:  P12350
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Submitted: 20 
  • OLDERADO: 1ERP Olderado

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 1993-10-31
    Type: Initial release
  • Version 1.1: 2008-03-24
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance