Structure of Aedes aegypti OBP22 in the complex with benzaldehyde

Experimental Data Snapshot

  • Resolution: 2.59 Å
  • R-Value Free: 0.209 
  • R-Value Work: 0.194 
  • R-Value Observed: 0.195 

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Aedes aegypti Odorant Binding Protein 22 selectively binds fatty acids through a conformational change in its C-terminal tail.

Wang, J.Murphy, E.J.Nix, J.C.Jones, D.N.M.

(2020) Sci Rep 10: 3300-3300

  • DOI: https://doi.org/10.1038/s41598-020-60242-9
  • Primary Citation of Related Structures:  
    6NBN, 6OG0, 6OGH, 6OII, 6OMW, 6OPB, 6OTL, 6P2E

  • PubMed Abstract: 

    Aedes aegypti is the primary vector for transmission of Dengue, Zika and chikungunya viruses. Previously it was shown that Dengue virus infection of the mosquito led to an in increased expression of the odorant binding protein 22 (AeOBP22) within the mosquito salivary gland and that siRNA mediated knockdown of AeOBP22 led to reduced mosquito feeding behaviors. Insect OBPs are implicated in the perception, storage and transport of chemosensory signaling molecules including air-borne odorants and pheromones. AeOBP22 is unusual as it is additionally expressed in multiple tissues, including the antenna, the male reproductive glands and is transferred to females during reproduction, indicating multiple roles in the mosquito life cycle. However, it is unclear what role it plays in these tissues and what ligands it interacts with. Here we present solution and X-ray crystallographic studies that indicate a potential role of AeOBP22 binding to fatty acids, and that the specificity for longer chain fatty acids is regulated by a conformational change in the C-terminal tail that leads to creation of an enlarged binding cavity that enhances binding affinity. This study sheds light onto the native ligands for AeOBP22 and provides insight into its potential functions in different tissues.

  • Organizational Affiliation

    Program in Structural Biology and Biochemistry, University of Colorado School of Medicine, Anschutz Medical Campus, 12801 East 17th Ave, Aurora, CO, 80045, USA. david.jones@cuanschutz.edu.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
AAEL005772-PA123Aedes aegyptiMutation(s): 0 
Gene Names: 5567053AAEL005772
Find proteins for Q1HRL7 (Aedes aegypti)
Explore Q1HRL7 
Go to UniProtKB:  Q1HRL7
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ1HRL7
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 2.59 Å
  • R-Value Free: 0.209 
  • R-Value Work: 0.194 
  • R-Value Observed: 0.195 
  • Space Group: P 31 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 87.76α = 90
b = 87.76β = 90
c = 59.63γ = 120
Software Package:
Software NamePurpose
XDSdata reduction
SCALAdata scaling

Structure Validation

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Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)United StatesAI121253

Revision History  (Full details and data files)

  • Version 1.0: 2019-06-12
    Type: Initial release
  • Version 1.1: 2019-12-18
    Changes: Author supporting evidence
  • Version 1.2: 2020-05-06
    Changes: Database references