Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Submitted: 
  • Selection Criteria: LOWEST TARGET FUNCTION 

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This is version 1.4 of the entry. See complete history


Structure of the insect cytokine peptide plasmatocyte-spreading peptide 1 from Pseudoplusia includens.

Volkman, B.F.Anderson, M.E.Clark, K.D.Hayakawa, Y.Strand, M.R.Markley, J.L.

(1999) J Biol Chem 274: 4493-4496

  • DOI: https://doi.org/10.1074/jbc.274.8.4493
  • Primary Citation of Related Structures:  
    1B1V, 1B5N

  • PubMed Abstract: 

    The structure of the recently identified plasmatocyte spreading peptide from the moth Pseudoplusia includens (PSP1) has been determined by NMR spectroscopy. This novel insect cytokine consists of 23 amino acid residues and a single disulfide bond. Torsion angle dynamics calculations utilizing a total of 337 distance constraints yielded an ensemble of 30 structures with an average backbone root mean square deviation for residues 7-22 of 0.18 A from the mean structure. The structure consists of a disordered N-terminal region and a well defined core that is stabilized by numerous hydrophobic interactions and a short beta-hairpin. Structural comparisons confirm that PSP1 adopts an epidermal growth factor (EGF)-like fold with close similarity to the C-terminal subdomain of EGF-like module 5 of human thrombomodulin. The combination of the three-dimensional structure of PSP1 and the extensive literature on EGF-receptor interactions should accelerate the process of identifying the specific residues responsible for receptor binding activity of this family of immunoregulatory peptides.

  • Organizational Affiliation

    National Magnetic Resonance Facility at Madison, Department of Biochemistry, University of Wisconsin-Madison, Madison, Wisconsin 53706-1544, USA. volkman@nmrfam.wisc.edu


Find similar proteins by:  Sequence   |   3D Structure  

Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Membrane Entity: Yes 
Find proteins for O61704 (Chrysodeixis includens)
Explore O61704 
Go to UniProtKB:  O61704
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupO61704
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Submitted: 
  • Selection Criteria: LOWEST TARGET FUNCTION 

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 1999-01-13
    Type: Initial release
  • Version 1.1: 2008-04-27
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2022-02-16
    Changes: Database references, Derived calculations
  • Version 1.4: 2023-12-27
    Changes: Data collection