Biological Assembly 1  

 3D View: Structure | 1D-3D View | Electron Density | Validation Report | Predict Membrane 

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 2-mer - A1B1 

Biological assembly 1 assigned by authors and generated by PISA (software)

Biological Assembly 2  

 3D View: Structure | 1D-3D View | Electron Density | Validation Report | Predict Membrane 

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 2-mer - A1B1 Pseudo Symmetry: Cyclic - C2  (3D View)
Pseudo Stoichiometry: Homo 2-mer - A2 

Biological assembly 2 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 302.99 kDa 
• Atom Count: 18150 
• Modelled Residue Count: 2297 
• Deposited Residue Count: 2702 
• Unique protein chains: 2

5DO7

Crystal Structure of the Human Sterol Transporter ABCG5/ABCG8

• PDB DOI: 10.2210/pdb5DO7/pdb

• Classification: TRANSPORT PROTEIN
• Organism(s): Homo sapiens
• Expression System: Komagataella pastoris
• Mutation(s): Yes 
• Membrane Protein: Yes  OPMPDBTMMemProtMDmpstruc


• Deposited: 2015-09-10 Released: 2016-05-11 
• Deposition Author(s): Lee, J.-Y., Kinch, L.N., Borek, D.M., Urbatsch, I.L., Xie, X.-S., Grishin, N.V., Cohen, J.C., Otwinowski, Z., Hobbs, H.H., Rosenbaum, D.M.
• Funding Organization(s): National Institutes of Health/National Heart, Lung, and Blood Institute (NIH/NHLBI), National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS), American Heart Association

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 3.93 Å
• R-Value Free: 0.329 
• R-Value Work: 0.245 
• R-Value Observed: 0.250 

Literature

Crystal structure of the human sterol transporter ABCG5/ABCG8.

Lee, J.Y., Kinch, L.N., Borek, D.M., Wang, J., Wang, J., Urbatsch, I.L., Xie, X.S., Grishin, N.V., Cohen, J.C., Otwinowski, Z., Hobbs, H.H., Rosenbaum, D.M.

(2016) Nature 533: 561-564

• PubMed: 27144356 
• DOI: 10.1038/nature17666
• Primary Citation of Related Structures:  
  5DO7


• PubMed Abstract: 
  

ATP binding cassette (ABC) transporters play critical roles in maintaining sterol balance in higher eukaryotes. The ABCG5/ABCG8 heterodimer (G5G8) mediates excretion of neutral sterols in liver and intestines. Mutations disrupting G5G8 cause sitosterolaemia, a disorder characterized by sterol accumulation and premature atherosclerosis. Here we use crystallization in lipid bilayers to determine the X-ray structure of human G5G8 in a nucleotide-free state at 3.9 Å resolution, generating the first atomic model of an ABC sterol transporter. The structure reveals a new transmembrane fold that is present in a large and functionally diverse superfamily of ABC transporters. The transmembrane domains are coupled to the nucleotide-binding sites by networks of interactions that differ between the active and inactive ATPases, reflecting the catalytic asymmetry of the transporter. The G5G8 structure provides a mechanistic framework for understanding sterol transport and the disruptive effects of mutations causing sitosterolaemia.

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Organizational Affiliation: 

Department of Biochemistry, University of Texas Southwestern Medical Center, Dallas, Texas 75390, USA.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
ATP-binding cassette sub-family G member 5	A, D [auth C]	666	Homo sapiens	Mutation(s): 1  Gene Names: ABCG5 EC: 7.6.2 Membrane Entity: Yes
UniProt & NIH Common Fund Data Resources
Find proteins for Q9H222 (Homo sapiens) Explore Q9H222  Go to UniProtKB:  Q9H222
PHAROS:  Q9H222

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
ATP-binding cassette sub-family G member 8	B, C [auth D]	685	Homo sapiens	Mutation(s): 0  Gene Names: ABCG8 EC: 7.6.2 Membrane Entity: Yes
UniProt & NIH Common Fund Data Resources
Find proteins for Q9H221 (Homo sapiens) Explore Q9H221  Go to UniProtKB:  Q9H221
PHAROS:  Q9H221

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 3.93 Å
• R-Value Free: 0.329 
• R-Value Work: 0.245 
• R-Value Observed: 0.250 
• Space Group: I 2 2 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 173.552	α = 90
b = 224.804	β = 90
c = 253.304	γ = 90

Software Package:

Software Name	Purpose
REFMAC	refinement
HKL-3000	data reduction
HKL-3000	data scaling
MLPHARE	phasing

Structure Validation

Entry History & Funding Information

Deposition Data

• Deposited Date: 2015-09-10 
• Released Date: 2016-05-11 
Deposition Author(s): Lee, J.-Y., Kinch, L.N., Borek, D.M., Urbatsch, I.L., Xie, X.-S., Grishin, N.V., Cohen, J.C., Otwinowski, Z., Hobbs, H.H., Rosenbaum, D.M.

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Funding Organization	Location	Grant Number
National Institutes of Health/National Heart, Lung, and Blood Institute (NIH/NHLBI)	United States	HL72304
National Institutes of Health/National Heart, Lung, and Blood Institute (NIH/NHLBI)	United States	P01-HL20948
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)	United States	GM113050
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)	United States	GM053163
American Heart Association	United States	0825285F
American Heart Association	United States	0463130Y

Revision History  

• Version 1.0: 2016-05-11
  Type: Initial release
  
• Version 1.1: 2016-05-25
  Changes: Database references
• Version 1.2: 2016-06-08
  Changes: Database references
• Version 1.3: 2017-09-27
  Changes: Author supporting evidence, Database references, Derived calculations
• Version 1.4: 2019-12-04
  Changes: Author supporting evidence