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Open data
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Basic information
Entry | Database: PDB / ID: 7xxb | |||||||||
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Title | IAA bound state of AtPIN3 | |||||||||
![]() | Auxin efflux carrier component 3 | |||||||||
![]() | TRANSPORT PROTEIN / PIN-FORMED (PIN) protein | |||||||||
Function / homology | ![]() tropism / root hair initiation / positive gravitropism / auxin efflux transmembrane transporter activity / root hair elongation / auxin polar transport / auxin export across the plasma membrane / gravitropism / root development / auxin-activated signaling pathway ...tropism / root hair initiation / positive gravitropism / auxin efflux transmembrane transporter activity / root hair elongation / auxin polar transport / auxin export across the plasma membrane / gravitropism / root development / auxin-activated signaling pathway / vesicle membrane / lateral plasma membrane / response to light stimulus / cell surface / protein homodimerization activity / mitochondrion / identical protein binding / plasma membrane Similarity search - Function | |||||||||
Biological species | ![]() ![]() | |||||||||
Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 2.93 Å | |||||||||
![]() | Su, N. | |||||||||
Funding support | ![]()
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![]() | ![]() Title: Structures and mechanisms of the Arabidopsis auxin transporter PIN3. Authors: Nannan Su / Aiqin Zhu / Xin Tao / Zhong Jie Ding / Shenghai Chang / Fan Ye / Yan Zhang / Cheng Zhao / Qian Chen / Jiangqin Wang / Chen Yu Zhou / Yirong Guo / Shasha Jiao / Sufen Zhang / Han ...Authors: Nannan Su / Aiqin Zhu / Xin Tao / Zhong Jie Ding / Shenghai Chang / Fan Ye / Yan Zhang / Cheng Zhao / Qian Chen / Jiangqin Wang / Chen Yu Zhou / Yirong Guo / Shasha Jiao / Sufen Zhang / Han Wen / Lixin Ma / Sheng Ye / Shao Jian Zheng / Fan Yang / Shan Wu / Jiangtao Guo / ![]() Abstract: The PIN-FORMED (PIN) protein family of auxin transporters mediates polar auxin transport and has crucial roles in plant growth and development. Here we present cryo-electron microscopy structures of ...The PIN-FORMED (PIN) protein family of auxin transporters mediates polar auxin transport and has crucial roles in plant growth and development. Here we present cryo-electron microscopy structures of PIN3 from Arabidopsis thaliana in the apo state and in complex with its substrate indole-3-acetic acid and the inhibitor N-1-naphthylphthalamic acid (NPA). A. thaliana PIN3 exists as a homodimer, and its transmembrane helices 1, 2 and 7 in the scaffold domain are involved in dimerization. The dimeric PIN3 forms a large, joint extracellular-facing cavity at the dimer interface while each subunit adopts an inward-facing conformation. The structural and functional analyses, along with computational studies, reveal the structural basis for the recognition of indole-3-acetic acid and NPA and elucidate the molecular mechanism of NPA inhibition on PIN-mediated auxin transport. The PIN3 structures support an elevator-like model for the transport of auxin, whereby the transport domains undergo up-down rigid-body motions and the dimerized scaffold domains remain static. | |||||||||
History |
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Structure visualization
Structure viewer | Molecule: ![]() ![]() |
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Downloads & links
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Download
PDBx/mmCIF format | ![]() | 266.5 KB | Display | ![]() |
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PDB format | ![]() | 210.8 KB | Display | ![]() |
PDBx/mmJSON format | ![]() | Tree view | ![]() | |
Others | ![]() |
-Validation report
Arichive directory | ![]() ![]() | HTTPS FTP |
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-Related structure data
Related structure data | ![]() 33500MC ![]() 7wksC ![]() 7wkwC C: citing same article ( M: map data used to model this data |
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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: 73983.531 Da / Num. of mol.: 2 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() #2: Chemical | Has ligand of interest | Y | |
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-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: IAA-bound state AtPIN3(AtPIN3-IAA) / Type: COMPLEX / Entity ID: #1 / Source: RECOMBINANT |
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Source (natural) | Organism: ![]() ![]() |
Source (recombinant) | Organism: ![]() |
Buffer solution | pH: 7.4 |
Specimen | Conc.: 6 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES |
Vitrification | Cryogen name: ETHANE |
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Electron microscopy imaging
Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |
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Microscopy | Model: FEI TITAN KRIOS |
Electron gun | Electron source: ![]() |
Electron lens | Mode: DARK FIELD / Nominal defocus max: 1600 nm / Nominal defocus min: 1000 nm / Cs: 2.7 mm / C2 aperture diameter: 50 µm |
Image recording | Average exposure time: 6 sec. / Electron dose: 52 e/Å2 / Film or detector model: FEI FALCON IV (4k x 4k) |
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Processing
Software | Name: PHENIX / Version: 1.19.2_4158: / Classification: refinement | ||||||||||||||||||||||||
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CTF correction | Type: PHASE FLIPPING AND AMPLITUDE CORRECTION | ||||||||||||||||||||||||
3D reconstruction | Resolution: 2.93 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 177699 / Symmetry type: POINT | ||||||||||||||||||||||||
Refine LS restraints |
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