8WO7

Apo state of Arabidopsis AZG1 T440Y


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 2.90 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Structures and mechanisms of the Arabidopsis cytokinin transporter AZG1.

Xu, L.Jia, W.Tao, X.Ye, F.Zhang, Y.Ding, Z.J.Zheng, S.J.Qiao, S.Su, N.Zhang, Y.Wu, S.Guo, J.

(2024) Nat Plants 10: 180-191

  • DOI: https://doi.org/10.1038/s41477-023-01590-y
  • Primary Citation of Related Structures:  
    8IRL, 8IRM, 8IRN, 8IRO, 8IRP, 8WMQ, 8WO7

  • PubMed Abstract: 

    Cytokinins are essential for plant growth and development, and their tissue distributions are regulated by transmembrane transport. Recent studies have revealed that members of the 'Aza-Guanine Resistant' (AZG) protein family from Arabidopsis thaliana can mediate cytokinin uptake in roots. Here we present 2.7 to 3.3 Å cryo-electron microscopy structures of Arabidopsis AZG1 in the apo state and in complex with its substrates trans-zeatin (tZ), 6-benzyleaminopurine (6-BAP) or kinetin. AZG1 forms a homodimer and each subunit shares a similar topology and domain arrangement with the proteins of the nucleobase/ascorbate transporter (NAT) family. These structures, along with functional analyses, reveal the molecular basis for cytokinin recognition. Comparison of the AZG1 structures determined in inward-facing conformations and predicted by AlphaFold2 in the occluded conformation allowed us to propose that AZG1 may carry cytokinins across the membrane through an elevator mechanism.


  • Organizational Affiliation

    Department of Biophysics and Department of Neurology of the Fourth Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China. lingyixv@zju.edu.cn.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Adenine/guanine permease AZG1
A, B
615Arabidopsis thalianaMutation(s): 1 
Gene Names: AZG1
Membrane Entity: Yes 
UniProt
Find proteins for Q9SRK7 (Arabidopsis thaliana)
Explore Q9SRK7 
Go to UniProtKB:  Q9SRK7
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ9SRK7
Glycosylation
Glycosylation Sites: 1
Sequence Annotations
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  • Reference Sequence
Oligosaccharides

Help

Entity ID: 2
MoleculeChains Length2D Diagram Glycosylation3D Interactions
2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose
C, D
2N-Glycosylation
Glycosylation Resources
GlyTouCan:  G42666HT
GlyCosmos:  G42666HT
GlyGen:  G42666HT
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 2.90 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data

  • Released Date: 2024-01-10 
  • Deposition Author(s): Xu, L., Guo, J.

Funding OrganizationLocationGrant Number
Ministry of Science and Technology (MoST, China)China2022YFA1303400
Ministry of Science and Technology (MoST, China)China2020YFA0908501
Ministry of Science and Technology (MoST, China)China2020YFA0908400

Revision History  (Full details and data files)

  • Version 1.0: 2024-01-10
    Type: Initial release
  • Version 1.1: 2024-01-17
    Changes: Database references
  • Version 1.2: 2024-02-07
    Changes: Database references