7XXB

IAA bound state of AtPIN3


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 2.93 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

Structures and mechanisms of the Arabidopsis auxin transporter PIN3.

Su, N.Zhu, A.Tao, X.Ding, Z.J.Chang, S.Ye, F.Zhang, Y.Zhao, C.Chen, Q.Wang, J.Zhou, C.Y.Guo, Y.Jiao, S.Zhang, S.Wen, H.Ma, L.Ye, S.Zheng, S.J.Yang, F.Wu, S.Guo, J.

(2022) Nature 609: 616-621

  • DOI: https://doi.org/10.1038/s41586-022-05142-w
  • Primary Citation of Related Structures:  
    7WKS, 7WKW, 7XXB

  • PubMed Abstract: 

    The PIN-FORMED (PIN) protein family of auxin transporters mediates polar auxin transport and has crucial roles in plant growth and development 1,2 . 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.


  • Organizational Affiliation

    Department of Biophysics and Department of Neurology of the Fourth Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Auxin efflux carrier component 3
A, B
680Arabidopsis thalianaMutation(s): 0 
Gene Names: PIN3At1g70940F15H11.14
Membrane Entity: Yes 
UniProt
Find proteins for Q9S7Z8 (Arabidopsis thaliana)
Explore Q9S7Z8 
Go to UniProtKB:  Q9S7Z8
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ9S7Z8
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 2.93 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data

  • Released Date: 2022-08-10 
  • Deposition Author(s): Su, N.

Funding OrganizationLocationGrant Number
Ministry of Science and Technology (MoST, China)China2020YFA0908501
Ministry of Science and Technology (MoST, China)China2018YFA0508100

Revision History  (Full details and data files)

  • Version 1.0: 2022-08-10
    Type: Initial release
  • Version 1.1: 2022-09-21
    Changes: Database references, Structure summary
  • Version 1.2: 2022-09-28
    Changes: Database references
  • Version 1.3: 2024-07-03
    Changes: Data collection