2JOD

Pac1-Rshort N-terminal EC domain Pacap(6-38) complex


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 300 
  • Conformers Submitted: 
  • Selection Criteria: structures with the lowest energy 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Solution structure and mutational analysis of pituitary adenylate cyclase-activating polypeptide binding to the extracellular domain of PAC1-RS.

Sun, C.Song, D.Davis-Taber, R.A.Barrett, L.W.Scott, V.E.Richardson, P.L.Pereda-Lopez, A.Uchic, M.E.Solomon, L.R.Lake, M.R.Walter, K.A.Hajduk, P.J.Olejniczak, E.T.

(2007) Proc.Natl.Acad.Sci.Usa 104: 7875-7880

  • DOI: 10.1073/pnas.0611397104

  • PubMed Abstract: 
  • The pituitary adenylate cyclase-activating polypeptide (PACAP) receptor is a class II G protein-coupled receptor that contributes to many different cellular functions including neurotransmission, neuronal survival, and synaptic plasticity. The soluti ...

    The pituitary adenylate cyclase-activating polypeptide (PACAP) receptor is a class II G protein-coupled receptor that contributes to many different cellular functions including neurotransmission, neuronal survival, and synaptic plasticity. The solution structure of the potent antagonist PACAP (residues 6'-38') complexed to the N-terminal extracellular (EC) domain of the human splice variant hPAC1-R-short (hPAC1-R(S)) was determined by NMR. The PACAP peptide adopts a helical conformation when bound to hPAC1-R(S) with a bend at residue A18' and makes extensive hydrophobic and electrostatic interactions along the exposed beta-sheet and interconnecting loops of the N-terminal EC domain. Mutagenesis data on both the peptide and the receptor delineate the critical interactions between the C terminus of the peptide and the C terminus of the EC domain that define the high affinity and specificity of hormone binding to hPAC1-R(S). These results present a structural basis for hPAC1-R(S) selectivity for PACAP versus the vasoactive intestinal peptide and also differentiate PACAP residues involved in binding to the N-terminal extracellular domain versus other parts of the full-length hPAC1-R(S) receptor. The structural, mutational, and binding data are consistent with a model for peptide binding in which the C terminus of the peptide hormone interacts almost exclusively with the N-terminal EC domain, whereas the central region makes contacts to both the N-terminal and other extracellular parts of the receptor, ultimately positioning the N terminus of the peptide to contact the transmembrane region and result in receptor activation.


    Organizational Affiliation

    Global Pharmaceutical Discovery Division, Abbott Laboratories, Abbott Park, IL 60064, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Pituitary adenylate cyclase-activating polypeptide type I receptor
A
106Homo sapiensMutation(s): 1 
Gene Names: ADCYAP1R1
Find proteins for P41586 (Homo sapiens)
Go to Gene View: ADCYAP1R1
Go to UniProtKB:  P41586
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Pituitary adenylate cyclase-activating polypeptide
B
33Homo sapiensMutation(s): 0 
Gene Names: ADCYAP1
Find proteins for P18509 (Homo sapiens)
Go to Gene View: ADCYAP1
Go to UniProtKB:  P18509
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 300 
  • Conformers Submitted: 
  • Selection Criteria: structures with the lowest energy 

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2007-05-22
    Type: Initial release
  • Version 1.1: 2008-05-01
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance