2EQH | pdb_00002eqh

Solution structure of growth-blocking peptide of the armyworm, Pseudaletia separata

• PDB DOI: https://doi.org/10.2210/pdb2EQH/pdb

• Classification: CYTOKINE
• Organism(s): Mythimna separata
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2007-03-30 Released: 2008-04-01 
• Deposition Author(s): Umetsu, Y., Aizawa, T., Kamiya, M., Kumaki, Y., Demura, M., Kawano, K.

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Experimental Data Snapshot

• Method: SOLUTION NMR
• Conformers Calculated: 100 
• Conformers Submitted: 20 
• Selection Criteria: structures with the lowest energy 

Literature

C-terminal elongation of growth-blocking peptide enhances its biological activity and micelle binding affinity

Umetsu, Y., Aizawa, T., Muto, K., Yamamoto, H., Kamiya, M., Kumaki, Y., Mizuguchi, M., Demura, M., Hayakawa, Y., Kawano, K.

(2009) J Biol Chem 284: 29625-29634

• PubMed: 19710009 
• DOI: https://doi.org/10.1074/jbc.M109.011148
• Primary Citation Related Structures: 
  2EQH, 2EQQ, 2EQT


• PubMed Abstract: 
  

  Growth-blocking peptide (GBP) is a hormone-like peptide that suppresses the growth of the host armyworm. Although the 23-amino acid GBP (1-23 GBP) is expressed in nonparasitized armyworm plasma, the parasitization by wasp produces the 28-amino acid GBP (1-28 GBP) through an elongation of the C-terminal amino acid sequence. In this study, we characterized the GBP variants, which consist of various lengths of the C-terminal region, by comparing their biological activities and three-dimensional structures. The results of an injection study indicate that 1-28 GBP most strongly suppresses larval growth. NMR analysis shows that these peptides have basically the same tertiary structures and that the extension of the C-terminal region is disordered. However, the C-terminal region of 1-28 GBP undergoes a conformational transition from a random coiled state to an alpha-helical state in the presence of dodecylphosphocholine micelles. This suggests that binding of the C-terminal region would affect larval growth activity.

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Organizational Affiliation: 
• Division of Biological Sciences, Graduate School of Science, Hokkaido University, Sapporo 060-0810, Japan.

Biological Assembly 1  

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

Biological assembly 1 assigned by authors.

Macromolecule Content 

• Total Structure Weight: 2.5 kDa 
• Atom Count: 173 
• Modeled Residue Count: 23 
• Deposited Residue Count: 23 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Growth-blocking peptide, short form	A	23	Mythimna separata	Mutation(s): 0
UniProt
Find proteins for Q27913 (Mythimna separata) Explore Q27913  Go to UniProtKB:  Q27913

Experimental Data & Validation

Experimental Data

• Method: SOLUTION NMR
• Conformers Calculated: 100 
• Conformers Submitted: 20 
• Selection Criteria: structures with the lowest energy 

Structure Validation

Entry History 

Deposition Data

• Released Date: 2008-04-01 
Deposition Author(s): Umetsu, Y., Aizawa, T., Kamiya, M., Kumaki, Y., Demura, M., Kawano, K.

Revision History  

• Version 1.0: 2008-04-01
  Type: Initial release
  
• Version 1.1: 2011-07-13
  Changes: Version format compliance
• Version 1.2: 2024-11-13
  Changes: Data collection, Database references, Structure summary