1CQ0

SOLUTION STRUCTURE OF A HUMAN HYPOCRETIN-2/OREXIN-B'SOLUTION STRUCTURE OF A HUMAN HYPOCRETIN-2/OREXIN-B '


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 25 
  • Conformers Submitted: 
  • Selection Criteria: REM AVERAGE CONFORMATION 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Solution structure of a new hypothalamic neuropeptide, human hypocretin-2/orexin-B.

Lee, J.H.Bang, E.Chae, K.J.Kim, J.Y.Lee, D.W.Lee, W.

(1999) Eur.J.Biochem. 266: 831-839


  • PubMed Abstract: 
  • Orexin-A and orexin-B (also called hypocretin-1 and hypocretin-2, respectively) are novel hypothalamic neuropeptides encoded by a single mRNA transcript; they stimulate food intake. We have determined the three-dimensional solution structure of human ...

    Orexin-A and orexin-B (also called hypocretin-1 and hypocretin-2, respectively) are novel hypothalamic neuropeptides encoded by a single mRNA transcript; they stimulate food intake. We have determined the three-dimensional solution structure of human hypocretin-2/orexin-B using two-dimensional 1H-NMR data and dynamical simulated annealing calculations. On the basis of NOEs, 3JHNalpha coupling constants and hydrogen-deuterium exchange rates together with chemical shift indices, human hypocretin-2/orexin-B was deduced to consist of two alpha-helices connected with a short linker in both H2O and 30% trifluoroethanol solutions. The helical axis of helix I is oriented about 60-80 degrees relative to helix II. Hybrid distance geometry and simulated-annealing protocols were used to generate an ensemble of 30 structures with no constraint violations greater than 0.03 nm for distances and 3 degrees for angles. In addition, human hypocretin-2/orexin-B shares a similar secondary-structural motif with human neuropeptide Y. This result can form the basis for further study on ligand-receptor recognition of human orexin receptors.


    Organizational Affiliation

    Department of Biochemistry College of Science, Yonsei University, Seoul, Korea.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
PROTEIN (NEW HYPOTHALAMIC NEUROPEPTIDE/OREXIN-B28)
A
28Homo sapiensMutation(s): 0 
Gene Names: HCRT (OX, PPORX, PPOX)
Find proteins for O43612 (Homo sapiens)
Go to Gene View: HCRT
Go to UniProtKB:  O43612
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 25 
  • Conformers Submitted: 
  • Selection Criteria: REM AVERAGE CONFORMATION 

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2000-01-10
    Type: Initial release
  • Version 1.1: 2008-04-27
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance
  • Version 1.3: 2018-03-14
    Type: Data collection, Derived calculations