Macromolecule Content

• Total Structure Weight: 5824.00 
• Atom Count: 298 
• Residue Count: 53 
• Unique protein chains: 1

1Y7J

NMR structure family of Human Agouti Signalling Protein (80-132: Q115Y, S124Y)

• DOI: 10.2210/pdb1Y7J/pdb

• Classification: SIGNALING PROTEIN
• Organism(s): Homo sapiens
• Mutation(s): 2 


• Deposited: 2004-12-08 Released: 2005-02-15 
• Deposition Author(s): McNulty, J.C., Jackson, P.J., Thompson, D.A., Chai, B., Gantz, I., Barsh, G.S., Dawson, P.E., Millhauser, G.L.

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Experimental Data Snapshot

• Method: SOLUTION NMR
• Conformers Calculated: 1000 
• Conformers Submitted: 21 
• Selection Criteria: target function 

Literature

Structures of the agouti signaling protein.

McNulty, J.C., Jackson, P.J., Thompson, D.A., Chai, B., Gantz, I., Barsh, G.S., Dawson, P.E., Millhauser, G.L.

(2005) J.Mol.Biol. 346: 1059-1070

• PubMed: 15701517 
• DOI: 10.1016/j.jmb.2004.12.030
• Primary Citation of Related Structures:  
  1Y7K


• PubMed Abstract: 
  

Expression of the agouti signaling protein (ASIP) during hair growth produces the red/yellow pigment pheomelanin. ASIP, and its neuropeptide homolog the agouti-related protein (AgRP) involved in energy balance, are novel, paracrine signaling molecules that act as inverse agonists at distinct subsets of melanocortin receptors. Ubiquitous ASIP expression in mice gives rise to a pleiotropic phenotype characterized by a uniform yellow coat color, obesity, overgrowth, and metabolic derangements similar to type II diabetes in humans. Here we report the synthesis and NMR structure of ASIP's active, cysteine-rich, C-terminal domain. ASIP adopts the inhibitor cystine knot fold and, along with AgRP, are the only known mammalian proteins in this structure class. Moreover, ASIP populates two distinct conformers resulting from a cis peptide bond at Pro102-Pro103 and a coexistence of cis/trans isomers of Ala104-Pro105. Pharmacologic studies of Pro-->Ala mutants demonstrate that the minor conformation with two cis peptide bonds is responsible for activity at all MCRs. The loop containing the heterogeneous Ala-Pro peptide bond is conserved in mammals, and suggests that ASIP is either trapped by evolution in this unusual configuration or possesses function outside of strict MCR antagonism.

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Related Citations: 

• Design, pharmacology, and NMR structure of a minimized cystine knot with agouti-related protein activity
  Jackson, P.J.,McNulty, J.C.,Yang, Y.K.,Thompson, D.A.,Chai, B.,Gantz, I.,Barsh, G.S.,Millhauser, G.L.
  (2002) Biochemistry 41: 7565
• High-resolution NMR structure of the chemically-synthesized melanocortin receptor binding domain AGRP(87-132) of the agouti-related protein
  McNulty, J.C.,Thompson, D.A.,Bolin, K.A.,Wilken, J.,Barsh, G.S.,Millhauser, G.L.
  (2001) Biochemistry 40: 15520




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Organizational Affiliation: 

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

Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
Agouti Signaling Protein	A	53	Homo sapiens	Mutation(s): 2  Gene Names: ASIP (AGTI, AGTIL, ASP)
Find proteins for P42127 (Homo sapiens) Go to Gene View: ASIP Go to UniProtKB:  P42127

Experimental Data & Validation

Experimental Data

• Method: SOLUTION NMR
• Conformers Calculated: 1000 
• Conformers Submitted: 21 
• Selection Criteria: target function 

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2004-12-08 
• Released Date: 2005-02-15 
• Deposition Author(s): McNulty, J.C., Jackson, P.J., Thompson, D.A., Chai, B., Gantz, I., Barsh, G.S., Dawson, P.E., Millhauser, G.L.

Revision History 

• Version 1.0: 2005-02-15
  Type: Initial release
• Version 1.1: 2008-04-30
  Type: Version format compliance
• Version 1.2: 2011-07-13
  Type: Version format compliance