2MKV | pdb_00002mkv

Structure of the NA,K-ATPASE regulatory protein FXYD2b in micelles

• PDB DOI: https://doi.org/10.2210/pdb2MKV/pdb
• BMRB: 19797

• Classification: TRANSPORT PROTEIN
• Organism(s): Homo sapiens
• Expression System: Escherichia coli
• Mutation(s): Yes 
• Membrane Protein: Yes  OPMPDBTMMemProtMD


• Deposited: 2014-02-13 Released: 2014-05-14 
• Deposition Author(s): Marassi, F.M., Gong, X.

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Experimental Data Snapshot

• Method: SOLUTION NMR
• Conformers Calculated: 100 
• Conformers Submitted: 10 
• Selection Criteria: structures with the lowest energy 

Literature

Structure of the Na,K-ATPase regulatory protein FXYD2b in micelles: Implications for membrane-water interfacial arginines.

Gong, X.M., Ding, Y., Yu, J., Yao, Y., Marassi, F.M.

(2015) Biochim Biophys Acta 1848: 299-306

• PubMed: 24794573 
• DOI: https://doi.org/10.1016/j.bbamem.2014.04.021
• Primary Citation Related Structures: 
  2MKV


• PubMed Abstract: 
  

  FXYD2 is a membrane protein responsible for regulating the function of the Na,K-ATPase in mammalian kidney epithelial cells. Here we report the structure of FXYD2b, one of two splice variants of the protein, determined by NMR spectroscopy in detergent micelles. Solid-state NMR characterization of the protein embedded in phospholipid bilayers indicates that several arginine side chains may be involved in hydrogen bond interactions with the phospholipid polar head groups. The structure and the NMR data suggest that FXYD2b could regulate the Na,K-ATPase by modulating the effective membrane surface electrostatics near the ion binding sites of the pump.

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Organizational Affiliation: 
• Sanford-Burnham Medical Research Institute, 10901 North Torrey Pines Road, La Jolla, CA 92037, USA.
Sanford-Burnham Medical Research Institute, 10901 North Torrey Pines Road, La Jolla, CA 92037, USA. Electronic address: [e-mail].

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors.

Macromolecule Content 

• Total Structure Weight: 7.33 kDa 
• Atom Count: 520 
• Modeled Residue Count: 64 
• Deposited Residue Count: 64 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Sodium/potassium-transporting ATPase subunit gamma	A	64	Homo sapiens	Mutation(s): 2  Gene Names: ATP1C, ATP1G1, FXYD2, FXYD2b Membrane Entity: Yes
UniProt & NIH Common Fund Data Resources
Find proteins for P54710 (Homo sapiens) Explore P54710  Go to UniProtKB:  P54710
PHAROS:  P54710 GTEx:  ENSG00000137731

Experimental Data & Validation

Experimental Data

• Method: SOLUTION NMR
• Conformers Calculated: 100 
• Conformers Submitted: 10 
• Selection Criteria: structures with the lowest energy 

Structure Validation

Entry History 

Deposition Data

• Released Date: 2014-05-14 
Deposition Author(s): Marassi, F.M., Gong, X.

Revision History  

• Version 1.0: 2014-05-14
  Type: Initial release
  
• Version 1.1: 2014-05-21
  Changes: Database references
• Version 1.2: 2014-12-24
  Changes: Database references
• Version 1.3: 2023-06-14
  Changes: Data collection, Database references, Other
• Version 1.4: 2024-05-15
  Changes: Data collection, Database references