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Open data
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Basic information
Entry | Database: PDB / ID: 8hbv | ||||||||||||||||||
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Title | Structure of human UCP1 in the nucleotide-free state | ||||||||||||||||||
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![]() | MEMBRANE PROTEIN / UCP1 / SLC25A7 / thermogenin / SLC25 | ||||||||||||||||||
Function / homology | ![]() purine ribonucleotide binding / cellular response to dehydroepiandrosterone / The fatty acid cycling model / : / oxidative phosphorylation uncoupler activity / mitochondrial transmembrane transport / adaptive thermogenesis / cardiolipin binding / regulation of reactive oxygen species biosynthetic process / cellular response to cold ...purine ribonucleotide binding / cellular response to dehydroepiandrosterone / The fatty acid cycling model / : / oxidative phosphorylation uncoupler activity / mitochondrial transmembrane transport / adaptive thermogenesis / cardiolipin binding / regulation of reactive oxygen species biosynthetic process / cellular response to cold / cellular response to fatty acid / response to temperature stimulus / long-chain fatty acid binding / diet induced thermogenesis / proton transmembrane transporter activity / Transcriptional regulation of brown and beige adipocyte differentiation by EBF2 / transmembrane transporter activity / brown fat cell differentiation / cellular response to hormone stimulus / proton transmembrane transport / response to cold / response to nutrient levels / cellular response to reactive oxygen species / GDP binding / positive regulation of cold-induced thermogenesis / mitochondrial inner membrane / regulation of transcription by RNA polymerase II / GTP binding / mitochondrion Similarity search - Function | ||||||||||||||||||
Biological species | ![]() synthetic construct (others) | ||||||||||||||||||
Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 2.51 Å | ||||||||||||||||||
![]() | Chen, L. / Kang, Y. | ||||||||||||||||||
Funding support | ![]()
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![]() | ![]() Title: Structural basis for the binding of DNP and purine nucleotides onto UCP1. Authors: Yunlu Kang / Lei Chen / ![]() Abstract: Uncoupling protein 1 (UCP1) conducts protons through the inner mitochondrial membrane to uncouple mitochondrial respiration from ATP production, thereby converting the electrochemical gradient of ...Uncoupling protein 1 (UCP1) conducts protons through the inner mitochondrial membrane to uncouple mitochondrial respiration from ATP production, thereby converting the electrochemical gradient of protons into heat. The activity of UCP1 is activated by endogenous fatty acids and synthetic small molecules, such as 2,4-dinitrophenol (DNP), and is inhibited by purine nucleotides, such as ATP. However, the mechanism by which UCP1 binds to these ligands remains unknown. Here we present the structures of human UCP1 in the nucleotide-free state, the DNP-bound state and the ATP-bound state. The structures show that the central cavity of UCP1 is open to the cytosolic side. DNP binds inside the cavity, making contact with transmembrane helix 2 (TM2) and TM6. ATP binds in the same cavity and induces conformational changes in TM2, together with the inward bending of TM1, TM4, TM5 and TM6 of UCP1, resulting in a more compact structure of UCP1. The binding site of ATP overlaps with that of DNP, suggesting that ATP competitively blocks the functional engagement of DNP, resulting in the inhibition of the proton-conducting activity of UCP1. | ||||||||||||||||||
History |
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Structure visualization
Structure viewer | Molecule: ![]() ![]() |
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Downloads & links
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Download
PDBx/mmCIF format | ![]() | 91.6 KB | Display | ![]() |
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PDB format | ![]() | 63 KB | Display | ![]() |
PDBx/mmJSON format | ![]() | Tree view | ![]() | |
Others | ![]() |
-Validation report
Arichive directory | ![]() ![]() | HTTPS FTP |
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-Related structure data
Related structure data | ![]() 34644MC ![]() 8hbwC ![]() 8j1nC M: map data used to model this data C: citing same article ( |
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Similar structure data | Similarity search - Function & homology ![]() |
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Links
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Assembly
Deposited unit | ![]()
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Components
#1: Protein | Mass: 39468.367 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() | ||
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#2: Antibody | Mass: 15004.661 Da / Num. of mol.: 1 / Source method: obtained synthetically / Source: (synth.) synthetic construct (others) | ||
#3: Chemical | ChemComp-CDL / | ||
#4: Chemical | Has ligand of interest | Y | |
-Experimental details
-Experiment
Experiment | Method: ELECTRON MICROSCOPY |
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EM experiment | Aggregation state: PARTICLE / 3D reconstruction method: single particle reconstruction |
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Sample preparation
Component | Name: UCP1-sybody complex / Type: COMPLEX / Entity ID: #1-#2 / Source: MULTIPLE SOURCES |
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Source (natural) | Organism: ![]() |
Source (recombinant) | Organism: ![]() |
Buffer solution | pH: 7.5 |
Specimen | Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES |
Vitrification | Cryogen name: ETHANE |
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Electron microscopy imaging
Microscopy | Model: FEI TITAN |
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Electron gun | Electron source: ![]() |
Electron lens | Mode: BRIGHT FIELD / Nominal defocus max: 1800 nm / Nominal defocus min: 1500 nm |
Image recording | Electron dose: 52 e/Å2 / Film or detector model: GATAN K3 BIOQUANTUM (6k x 4k) |
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Processing
CTF correction | Type: NONE |
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3D reconstruction | Resolution: 2.51 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 544602 / Symmetry type: POINT |