1HYK

AGOUTI-RELATED PROTEIN (87-132) (AC-AGRP(87-132))


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 40 
  • Conformers Submitted: 40 
  • Selection Criteria: see refinement method and details 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

NMR structure of a minimized human agouti related protein prepared by total chemical synthesis.

Bolin, K.A.Anderson, D.J.Trulson, J.A.Thompson, D.A.Wilken, J.Kent, S.B.Gantz, I.Millhauser, G.L.

(1999) FEBS Lett. 451: 125-131

  • Primary Citation of Related Structures:  1QU8

  • PubMed Abstract: 
  • The structure of the chemically synthesized C-terminal region of the human agouti related protein (AGRP) was determined by 2D 1H NMR. Referred to as minimized agouti related protein, MARP is a 46 residue polypeptide containing 10 Cys residues involve ...

    The structure of the chemically synthesized C-terminal region of the human agouti related protein (AGRP) was determined by 2D 1H NMR. Referred to as minimized agouti related protein, MARP is a 46 residue polypeptide containing 10 Cys residues involved in five disulfide bonds that retains the biological activity of full length AGRP. AGRP is a mammalian signaling molecule, involved in weight homeostasis, that causes adult onset obesity when overexpressed in mice. AGRP was originally identified by homology to the agouti protein, another potent signaling molecule involved in obesity disorders in mice. While AGRP's exact mechanism of action is unknown, it has been identified as a competitive antagonist of melanocortin receptors 3 and 4 (MC3r, MC4r), and MC4r in particular is implicated in the hypothalamic control of feeding behavior. Full length agouti and AGRP are only 25% homologous, however, their active C-terminal regions are approximately 40% homologous, with nine out of the 10 Cys residues spatially conserved. Until now, 3D structures have not been available for either agouti, AGRP or their C-terminal regions. The NMR structure of MARP reported here can be characterized as three major loops, with four of the five disulfide bridges at the base of the structure. Though its fold is well defined, no canonical secondary structure is identified. While previously reported structural models of the C-terminal region of AGRP were attempted based on Cys homology between AGRP and certain toxin proteins, we find that Cys spacing is not sufficient to correctly determine the 3D fold of the molecule.


    Related Citations: 
    • Determination of Disulfide Structure in Agouti-Related Protein (Agrp) by Stepwise Reduction and Alkylation
      Bures, E.J.,Hui, J.O.,Young, Y.,Chow, D.T.,Katta, V.,Rohde, M.F.,Zeni, L.,Rosenfeld, R.D.,Stark, K.L.,Haniu, M.
      (1998) Biochemistry 37: 12172
    • Characterization of Agouti-Related Protein Binding to Melanocortin Receptors.
      Yang, Y.K.,Thompson, D.A.,Dickinson, C.J.,Wilken, J.,Barsh, G.S.,Kent, S.B.,Gantz, I.
      (1999) Mol.Endocrinol. 13: 148


    Organizational Affiliation

    Department of Chemistry and Biochemistry, University of California, Santa Cruz 95064, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
AGOUTI RELATED PROTEIN
A
46Homo sapiensGene Names: AGRP (AGRT, ART)
Find proteins for O00253 (Homo sapiens)
Go to Gene View: AGRP
Go to UniProtKB:  O00253
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 40 
  • Conformers Submitted: 40 
  • Selection Criteria: see refinement method and details 
  • Olderado: 1HYK Olderado

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2001-02-07
    Type: Initial release
  • Version 1.1: 2008-04-27
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance