1R02

Solution structure of Human Orexin-A:Regulator of Appetite and Wakefulness

• PDB DOI: https://doi.org/10.2210/pdb1R02/pdb
• BMRB: 5994

• Classification: NEUROPEPTIDE
• Organism(s): Homo sapiens
• Mutation(s): No 


• Deposited: 2003-09-19 Released: 2004-09-19 
• Deposition Author(s): Kim, H.-Y., Hong, E., Kim, J.-I., Lee, W.

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Experimental Data Snapshot

• Method: SOLUTION NMR
• Conformers Submitted: 1 

Literature

Solution structure of human orexin-A: regulator of appetite and wakefulness.

Kim, H.Y., Hong, E., Kim, J.I., Lee, W.

(2004) J Biochem Mol Biol 37: 565-573

• PubMed: 15479620 
• DOI: https://doi.org/10.5483/bmbrep.2004.37.5.565
• Primary Citation of Related Structures:  
  1R02


• PubMed Abstract: 
  

  Orexin-A and orexin-B (hypocretin-1 and hypocretin-2, respectively) are important hypothalamic neuro-peptides, which are encoded by a single mRNA transcript and stimulate food intake as well as regulate wakefulness. Here we determined the solution structure of orexin-A by NMR spectroscopy and by simulated-annealing calculation. The structural features of orexin-A involve two alpha-helices, with the hydrophobic residues disposed to on one side of helix, and hydrophilic residues to the other. A hydrophilic turn induced by two disulfide bonds provides the key difference between orexin-A and -B. With previous mutagenic studies, the derived structure of orexin-A provides us with a structure-functional view for novel drug design.

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Organizational Affiliation: 

Department of Biochemistry, College of Science, Yonsei University, Seoul 120-740, Korea.

Biological Assembly 1  

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

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 3.59 kDa 
• Atom Count: 248 
• Modelled Residue Count: 33 
• Deposited Residue Count: 33 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Orexin-A	A	33	Homo sapiens	Mutation(s): 0
UniProt & NIH Common Fund Data Resources
Find proteins for O43612 (Homo sapiens) Explore O43612  Go to UniProtKB:  O43612
PHAROS:  O43612 GTEx:  ENSG00000161610

Experimental Data & Validation

Experimental Data

• Method: SOLUTION NMR
• Conformers Submitted: 1 

Structure Validation

Entry History 

Deposition Data

• Released Date: 2004-09-19 
Deposition Author(s): Kim, H.-Y., Hong, E., Kim, J.-I., Lee, W.

Revision History  

• Version 1.0: 2004-09-19
  Type: Initial release
  
• Version 1.1: 2008-04-29
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2019-10-09
  Changes: Data collection, Database references, Derived calculations, Source and taxonomy
• Version 1.4: 2024-10-23
  Changes: Data collection, Database references, Structure summary