2LAQ | pdb_00002laq

Solution structure of the Sex Peptide from Drosophila melanogaster

• PDB DOI: https://doi.org/10.2210/pdb2LAQ/pdb
• BMRB: 17533

• Classification: SIGNALING PROTEIN
• Organism(s): Drosophila melanogaster
• Mutation(s): No 


• Deposited: 2011-03-17 Released: 2011-04-27 
• Deposition Author(s): Moehle, K., Freund, A., Robinson, J.A.

---

Experimental Data Snapshot

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

Literature

NMR studies of the solution conformation of the sex peptide from Drosophila melanogaster.

Moehle, K., Freund, A., Kubli, E., Robinson, J.A.

(2011) FEBS Lett 585: 1197-1202

• PubMed: 21439282 
• DOI: https://doi.org/10.1016/j.febslet.2011.03.040
• Primary Citation Related Structures: 
  2LAQ


• PubMed Abstract: 
  

  The insect sex peptide (SP) elicits a variety of biological responses upon transfer to the mated female. SP contains 36 amino acids, including a tryptophan-rich N-terminal region, a central region containing five hydroxyproline (Hyp) residues, and a C-terminal region enclosed by a disulfide bridge. The solution structure of SP, studied here using NMR spectroscopy, includes a motif WPWN that adopts a type I β-turn in the N-terminal Trp-rich region. This turn region is connected to the central Hyp-rich region, which adopts extended and/or PPII-like conformations. The C-terminal disulfide-bonded loop populates helical turns or nascent helical structure. Overall, the results reveal a rather flexible peptide that lacks a compact folded structure in solution.

---

Organizational Affiliation: 
• Chemistry Department, University of Zurich, Winterthurerstrasse 190, 8057 Zurich, Switzerland.

Biological Assembly 1  

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

Biological assembly 1 assigned by authors.

Macromolecule Content 

• Total Structure Weight: 4.44 kDa 
• Atom Count: 313 
• Modeled Residue Count: 36 
• Deposited Residue Count: 36 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Accessory gland-specific peptide 70A	A	36	Drosophila melanogaster	Mutation(s): 0
UniProt
Find proteins for P05623 (Drosophila melanogaster) Explore P05623  Go to UniProtKB:  P05623

Small Molecules

Modified Residues  1 Unique
ID	Chains	Type	Formula	2D Diagram	Parent
HYP	A	L-PEPTIDE LINKING	C5 H9 N O3		PRO

Experimental Data & Validation

Experimental Data

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

Structure Validation

Entry History 

Deposition Data

• Released Date: 2011-04-27 
Deposition Author(s): Moehle, K., Freund, A., Robinson, J.A.

Revision History  

• Version 1.0: 2011-04-27
  Type: Initial release
  
• Version 1.1: 2011-07-13
  Changes: Version format compliance
• Version 1.2: 2023-06-14
  Changes: Data collection, Database references, Derived calculations, Other