5U77

Crystal structure of ORP8 PH domain

  • Classification: LIPID TRANSPORT
  • Organism(s): Homo sapiens
  • Expression System: Escherichia coli BL21(DE3)
  • Mutation(s): No 

  • Deposited: 2016-12-11 Released: 2017-10-18 
  • Deposition Author(s): Ghai, R., Yang, H.
  • Funding Organization(s): NHMRC-ARC dementia research development fellowship, National Health and Medical Research Council (NHMRC, Australia), Australian Research Council (ARC)

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.16 Å
  • R-Value Free: 0.274 
  • R-Value Work: 0.227 
  • R-Value Observed: 0.230 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

ORP5 and ORP8 bind phosphatidylinositol-4, 5-biphosphate (PtdIns(4,5)P 2) and regulate its level at the plasma membrane.

Ghai, R.Du, X.Wang, H.Dong, J.Ferguson, C.Brown, A.J.Parton, R.G.Wu, J.W.Yang, H.

(2017) Nat Commun 8: 757-757

  • DOI: 10.1038/s41467-017-00861-5
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • ORP5 and ORP8, members of the oxysterol-binding protein (OSBP)-related proteins (ORP) family, are endoplasmic reticulum membrane proteins implicated in lipid trafficking. ORP5 and ORP8 are reported to localize to endoplasmic reticulum-plasma membrane ...

    ORP5 and ORP8, members of the oxysterol-binding protein (OSBP)-related proteins (ORP) family, are endoplasmic reticulum membrane proteins implicated in lipid trafficking. ORP5 and ORP8 are reported to localize to endoplasmic reticulum-plasma membrane junctions via binding to phosphatidylinositol-4-phosphate (PtdIns(4)P), and act as a PtdIns(4)P/phosphatidylserine counter exchanger between the endoplasmic reticulum and plasma membrane. Here we provide evidence that the pleckstrin homology domain of ORP5/8 via PtdIns(4,5)P 2 , and not PtdIns(4)P binding mediates the recruitment of ORP5/8 to endoplasmic reticulum-plasma membrane contact sites. The OSBP-related domain of ORP8 can extract and transport multiple phosphoinositides in vitro, and knocking down both ORP5 and ORP8 in cells increases the plasma membrane level of PtdIns(4,5)P 2 with little effect on PtdIns(4)P. Overall, our data show, for the first time, that phosphoinositides other than PtdIns(4)P can also serve as co-exchangers for the transport of cargo lipids by ORPs.ORP5/8 are endoplasmic reticulum (ER) membrane proteins implicated in lipid trafficking that localize to ER-plasma membrane (PM) contacts and maintain membrane homeostasis. Here the authors show that PtdIns(4,5)P 2 plays a critical role in the targeting and function of ORP5/8 at the PM.


    Organizational Affiliation

    School of Biotechnology and Biomolecular Sciences, The University of New South Wales, Sydney, NSW, 2052, Australia. h.rob.yang@unsw.edu.au.



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Oxysterol-binding protein-related protein 8
A
123Homo sapiensMutation(s): 0 
Gene Names: OSBPL8KIAA1451ORP8OSBP10
Find proteins for Q9BZF1 (Homo sapiens)
Go to UniProtKB:  Q9BZF1
NIH Common Fund Data Resources
PHAROS  Q9BZF1
Protein Feature View
  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
NDB
Query on NDB

Download CCD File 
A
N-(2-hydroxyethyl)-N,N-dimethyl-3-sulfopropan-1-aminium
C7 H18 N O4 S
CNXPCGBLGHKAIL-UHFFFAOYSA-O
 Ligand Interaction
FMT
Query on FMT

Download CCD File 
A
FORMIC ACID
C H2 O2
BDAGIHXWWSANSR-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.16 Å
  • R-Value Free: 0.274 
  • R-Value Work: 0.227 
  • R-Value Observed: 0.230 
  • Space Group: P 65 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 57.079α = 90
b = 57.079β = 90
c = 154.949γ = 120
Software Package:
Software NamePurpose
PHENIXrefinement
iMOSFLMdata reduction
Aimlessdata scaling
PHASERphasing

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data

  • Deposited Date: 2016-12-11 
  • Released Date: 2017-10-18 
  • Deposition Author(s): Ghai, R., Yang, H.

Funding OrganizationLocationGrant Number
NHMRC-ARC dementia research development fellowshipAustralia1097185
National Health and Medical Research Council (NHMRC, Australia)Australia1041301
Australian Research Council (ARC)AustraliaDP130100457

Revision History 

  • Version 1.0: 2017-10-18
    Type: Initial release
  • Version 1.1: 2018-01-17
    Changes: Author supporting evidence
  • Version 1.2: 2020-01-01
    Changes: Author supporting evidence