4IAP

Crystal structure of PH domain of Osh3 from Saccharomyces cerevisiae

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.30 Å
  • R-Value Free: 0.274 
  • R-Value Work: 0.242 
  • R-Value Observed: 0.242 

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This is version 1.2 of the entry. See complete history. 


Literature

Structure of osh3 reveals a conserved mode of phosphoinositide binding in oxysterol-binding proteins

Tong, J., Yang, H., Yang, H., Eom, S.H., Im, Y.J.

(2013) Structure 21: 1203-1213

  • DOI: 10.1016/j.str.2013.05.007
  • Primary Citation of Related Structures:  
    4IAP, 4IC4, 4INQ

  • PubMed Abstract: 

    • The oxysterol-binding protein (OSBP)-related proteins (ORPs) are conserved from yeast to humans, and implicated in the regulation of lipid homeostasis and in signaling pathways. Saccharomyces cerevisiae has seven ORPs (Osh1-Osh7) that share one unknown essential function ...

    The oxysterol-binding protein (OSBP)-related proteins (ORPs) are conserved from yeast to humans, and implicated in the regulation of lipid homeostasis and in signaling pathways. Saccharomyces cerevisiae has seven ORPs (Osh1-Osh7) that share one unknown essential function. Here, we report the 1.5-2.3 Å structures of the PH domain and ORD (OSBP-related domain) of yeast Osh3 in apo-form or in complex with phosphatidylinositol 4-phosphate (PI[4]P). Osh3 recognizes PI(4)P by the highly conserved residues in the tunnel of ORD whereas it lacks sterol binding due to the narrow hydrophobic tunnel. Yeast complementation tests suggest that PI(4)P binding to PH and ORD is essential for function. This study suggests that the unifying feature in all ORP homologs is the binding of PI(4)P to ORD and sterol binding is additional to certain homologs. Structural modeling of full-length Osh3 is consistent with the concept that Osh3 is a lipid transfer protein or regulator in membrane contact sites.

    Organizational Affiliation: 

    College of Pharmacy, Chonnam National University, Gwangju 500-757, South Korea.



Macromolecules
Find similar proteins by: 
(by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Oxysterol-binding protein homolog 3,Endolysin,Oxysterol-binding protein homolog 3A, B260Saccharomyces cerevisiae S288C, Escherichia virus T4Mutation(s): 3 
Gene Names: OSH3, YHR073W, E
EC: 3.2.1.17
Membrane Entity: Yes 
UniProt
Find proteins for P38713 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Explore P38713 
Go to UniProtKB:  P38713
Find proteins for P00720 (Enterobacteria phage T4)
Explore P00720 
Go to UniProtKB:  P00720
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupsP38713P00720
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.30 Å
  • R-Value Free: 0.274 
  • R-Value Work: 0.242 
  • R-Value Observed: 0.242 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 98.033α = 90
b = 91.307β = 81.42
c = 84.13γ = 90
Software Package:
Software NamePurpose
HKL-2000data collection
MOLREPphasing
CNSrefinement
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

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Entry History 

Deposition Data

  • Deposited Date: 2012-12-07 
  • Released Date: 2013-07-31 
    • Deposition Author(s): Tong, J., Im, Y.J.

Revision History  (Full details and data files)

  • Version 1.0: 2013-07-31
    Type: Initial release
  • Version 1.1: 2015-10-28
    Changes: Source and taxonomy
  • Version 1.2: 2017-06-21
    Changes: Database references, Source and taxonomy, Structure summary