2QZT

Crystal Structure of Sterol Carrier Protein 2 Like 2 (SCP2-L2) from Aedes Aegypti


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.70 Å
  • R-Value Free: 0.236 
  • R-Value Work: 0.198 
  • R-Value Observed: 0.200 

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This is version 1.2 of the entry. See complete history


Literature

Three-dimensional structure/function analysis of SCP-2-like2 reveals differences among SCP-2 family members.

Dyer, D.H.Wessely, V.Forest, K.T.Lan, Q.

(2008) J Lipid Res 49: 644-653

  • DOI: 10.1194/jlr.M700460-JLR200
  • Primary Citation of Related Structures:  
    2QZT, 3BDQ

  • PubMed Abstract: 
  • Mosquito sterol carrier protein-2 (AeSCP-2) and sterol carrier protein-2-like2 (AeSCP-2L2) are members of the SCP-2 protein family with similar expression profiles in the mosquito life cycle. In an effort to understand how lipids can be transported by different SCP-2 proteins, the three-dimensional crystal structure of AeSCP-2L2 was solved at 1 ...

    Mosquito sterol carrier protein-2 (AeSCP-2) and sterol carrier protein-2-like2 (AeSCP-2L2) are members of the SCP-2 protein family with similar expression profiles in the mosquito life cycle. In an effort to understand how lipids can be transported by different SCP-2 proteins, the three-dimensional crystal structure of AeSCP-2L2 was solved at 1.7 A resolution. AeSCP-2L2 forms a dimer and binds three fatty acids, one of which resides in a position within the internal cavity at a right angle to the others. This first report of ligand-bound dimerized protein in the SCP-2 protein family indicates that the family has a much more divergent mode of interaction with ligands than previously reported. The potential function of AeSCP-2L2 was investigated via in vivo incorporation of [(3)H]cholesterol and [3H]palmitic acid. Overexpression of AeSCP-2L2 in mosquito cells leads to an increased uptake of free fatty acid, whereas knockdown of AeSCP-2L2 in adult females decreases the accumulation of free fatty acid in the fat body from a blood meal. In contrast, overexpression or knockdown of AeSCP-2L2 has no effect on cholesterol uptake. Our results suggest that the main function of AeSCP-2L2 is as a general intracellular fatty acid carrier, as opposed to having a dedicated role in cholesterol transport.


    Organizational Affiliation

    Department of Bacteriology, University of Wisconsin-Madison, Madison, WI 53706, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Sterol carrier protein 2-like 2A, B111Aedes aegyptiMutation(s): 0 
Gene Names: Sterol Carrier Protein 2 Like 2
UniProt
Find proteins for Q0GY13 (Aedes aegypti)
Explore Q0GY13 
Go to UniProtKB:  Q0GY13
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
PLM (Subject of Investigation/LOI)
Query on PLM

Download Ideal Coordinates CCD File 
C [auth A], D [auth A], E [auth B]PALMITIC ACID
C16 H32 O2
IPCSVZSSVZVIGE-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.70 Å
  • R-Value Free: 0.236 
  • R-Value Work: 0.198 
  • R-Value Observed: 0.200 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 45.36α = 90
b = 56.44β = 119.4
c = 50.61γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
SHARPphasing
SOLOMONphasing
REFMACrefinement
PDB_EXTRACTdata extraction
PROTEUM PLUSdata collection

Structure Validation

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Ligand Structure Quality Assessment  



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2008-03-11
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance
  • Version 1.2: 2017-10-25
    Changes: Refinement description