7CAL | pdb_00007cal

Cryo-EM Structure of the Hyperpolarization-Activated Inwardly Rectifying Potassium Channel KAT1 from Arabidopsis

• PDB DOI: https://doi.org/10.2210/pdb7CAL/pdb
• EM Map EMD-30334: EMDB EMDataResource

• Classification: MEMBRANE PROTEIN
• Organism(s): Arabidopsis thaliana
• Expression System: Spodoptera frugiperda
• Mutation(s): No 
• Membrane Protein: Yes  OPMPDBTMMemProtMDmpstruc


• Deposited: 2020-06-09 Released: 2020-07-29 
• Deposition Author(s): Li, S.Y., Yang, F., Sun, D.M., Zhang, Y., Zhang, M.G., Zhou, P., Liu, S.L., Zhang, Y.N., Zhang, L.H., Tian, C.L.
• Funding Organization(s): National Natural Science Foundation of China (NSFC)

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Experimental Data Snapshot

• Method: ELECTRON MICROSCOPY
• Resolution: 3.20 Å
• Aggregation State: PARTICLE 
• Reconstruction Method: SINGLE PARTICLE 

Literature

Cryo-EM structure of the hyperpolarization-activated inwardly rectifying potassium channel KAT1 from Arabidopsis.

Li, S., Yang, F., Sun, D., Zhang, Y., Zhang, M., Liu, S., Zhou, P., Shi, C., Zhang, L., Tian, C.

(2020) Cell Res 30: 1049-1052

• PubMed: 32901112 
• DOI: https://doi.org/10.1038/s41422-020-00407-3
• Primary Citation Related Structures: 
  7CAL

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Organizational Affiliation: 
• Hefei National Laboratory of Physical Sciences at Microscale, Anhui Laboratory of Advanced Photonic Science and Technology and School of Life Sciences, University of Science and Technology of China, Hefei, Anhui 230026, China.
Hefei National Laboratory of Physical Sciences at Microscale, Anhui Laboratory of Advanced Photonic Science and Technology and School of Life Sciences, University of Science and Technology of China, Hefei, Anhui 230026, China. [e-mail].
High Magnetic Field Laboratory, Chinese Academy of Sciences, Hefei, Anhui 230030, China.
Hefei National Laboratory of Physical Sciences at Microscale, Anhui Laboratory of Advanced Photonic Science and Technology and School of Life Sciences, University of Science and Technology of China, Hefei, Anhui 230026, China. [e-mail].
Hefei National Laboratory of Physical Sciences at Microscale, Anhui Laboratory of Advanced Photonic Science and Technology and School of Life Sciences, University of Science and Technology of China, Hefei, Anhui 230026, China. [e-mail].
High Magnetic Field Laboratory, Chinese Academy of Sciences, Hefei, Anhui 230030, China. [e-mail].

Biological Assembly 1  

Global Symmetry: Cyclic - C4  (Explore in 3D)
Global Stoichiometry: Homo 4-mer - A4 

Biological assembly 1 assigned by authors.

Biological Assembly Evidence: gel filtration

Macromolecule Content 

• Total Structure Weight: 316.44 kDa 
• Atom Count: 14,064 
• Modeled Residue Count: 1,776 
• Deposited Residue Count: 2,708 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Potassium channel KAT1	A, B, C, D	677	Arabidopsis thaliana	Mutation(s): 0  Gene Names: KAT1, At5g46240, MPL12.2 Membrane Entity: Yes
UniProt
Find proteins for Q39128 (Arabidopsis thaliana) Explore Q39128  Go to UniProtKB:  Q39128

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
3PE (Subject of Investigation/LOI)	E [auth A], F [auth B], G [auth C], H [auth D]	1,2-Distearoyl-sn-glycerophosphoethanolamine C41 H82 N O8 P LVNGJLRDBYCPGB-LDLOPFEMSA-N

Experimental Data & Validation

Experimental Data

• Method: ELECTRON MICROSCOPY
• Resolution: 3.20 Å
• Aggregation State: PARTICLE 
• Reconstruction Method: SINGLE PARTICLE 

EM Software:

Task	Software Package	Version
MODEL REFINEMENT	PHENIX

Structure Validation

Entry History 

& Funding Information

Deposition Data

• Released Date: 2020-07-29 
Deposition Author(s): Li, S.Y., Yang, F., Sun, D.M., Zhang, Y., Zhang, M.G., Zhou, P., Liu, S.L., Zhang, Y.N., Zhang, L.H., Tian, C.L.

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Funding Organization	Location	Grant Number
National Natural Science Foundation of China (NSFC)	China	31600601
National Natural Science Foundation of China (NSFC)	China	21778051
National Natural Science Foundation of China (NSFC)	China	21825703

Revision History  

• Version 1.0: 2020-07-29
  Type: Initial release
  
• Version 1.1: 2020-10-07
  Changes: Database references
• Version 1.2: 2020-11-18
  Changes: Database references
• Version 1.3: 2025-04-09
  Changes: Data collection, Database references, Derived calculations, Structure summary
• Version 1.4: 2025-06-25
  Changes: Advisory, Data collection, Derived calculations