6IYB

Structure of human ORP1 ANK - Rab7 complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.09 Å
  • R-Value Free: 0.232 
  • R-Value Work: 0.195 
  • R-Value Observed: 0.197 

wwPDB Validation   3D Report Full Report


This is version 1.0 of the entry. See complete history


Literature

Structural basis of human ORP1-Rab7 interaction for the late-endosome and lysosome targeting.

Tong, J.Tan, L.Chun, C.Im, Y.J.

(2019) PLoS One 14: e0211724-e0211724

  • DOI: 10.1371/journal.pone.0211724
  • Primary Citation of Related Structures:  
    6IYB

  • PubMed Abstract: 
  • Oxysterol-binding protein (OSBP) and OSBP-related proteins (ORPs) constitute a family of lipid transfer proteins conserved in eukaryotes. ORP1 transports cholesterol at the interface between the late endosomes/lysosomes (LELs) and the endoplasmic reticulum (ER) ...

    Oxysterol-binding protein (OSBP) and OSBP-related proteins (ORPs) constitute a family of lipid transfer proteins conserved in eukaryotes. ORP1 transports cholesterol at the interface between the late endosomes/lysosomes (LELs) and the endoplasmic reticulum (ER). ORP1 is targeted to the endosomal membranes by forming a tripartite complex with the LE GTPase Rab7 and its effector RILP (Rab7-interacting lysosomal protein). Here, we determined the crystal structure of human ORP1 ANK domain in complex with the GTP-bound form of Rab7. ORP1 ANK binds to the helix α3 of Rab7 located away from the switching regions, which makes the interaction independent of the nucleotide-binding state of Rab7. Thus, the effector-interacting switch regions of Rab7 are accessible for RILP binding, allowing formation of the ORP1-Rab7-RILP complex. ORP1 ANK binds to Rab7 and the Rab7-RILP complex with similar micro-molar affinities, which is consistent with the independence binding of ORP1 and RILP to Rab7. The structural model of the ORP1-Rab7-RILP complex correlates with the recruitment of ORP1 at the LEL-ER interface and the role in lipid transport and regulation.


    Organizational Affiliation

    College of Pharmacy, Chonnam National University, Gwangju, Republic of Korea.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Ras-related protein Rab-7a AC199Homo sapiensMutation(s): 1 
Gene Names: RAB7ARAB7
Find proteins for P51149 (Homo sapiens)
Explore P51149 
Go to UniProtKB:  P51149
NIH Common Fund Data Resources
PHAROS:  P51149
Protein Feature View
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Oxysterol-binding protein-related protein 1 BD154Homo sapiensMutation(s): 0 
Gene Names: OSBPL1AORP1OSBP8OSBPL1OSBPL1B
Find proteins for Q9BXW6 (Homo sapiens)
Explore Q9BXW6 
Go to UniProtKB:  Q9BXW6
NIH Common Fund Data Resources
PHAROS:  Q9BXW6
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
GTP
Query on GTP

Download Ideal Coordinates CCD File 
A, C
GUANOSINE-5'-TRIPHOSPHATE
C10 H16 N5 O14 P3
XKMLYUALXHKNFT-UUOKFMHZSA-N
 Ligand Interaction
MG
Query on MG

Download Ideal Coordinates CCD File 
A, C
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.09 Å
  • R-Value Free: 0.232 
  • R-Value Work: 0.195 
  • R-Value Observed: 0.197 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 55.136α = 90
b = 117.222β = 90
c = 130.476γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
HKL-2000data reduction
HKL-2000data scaling
PHASERphasing

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data

  • Deposited Date: 2018-12-14 
  • Released Date: 2019-03-13 
  • Deposition Author(s): Tong, J., Im, Y.J.

Funding OrganizationLocationGrant Number
National Research Foundation (Korea)Korea, Republic OfNRF-2017R1A2B4004914

Revision History  (Full details and data files)

  • Version 1.0: 2019-03-13
    Type: Initial release