1N9U

Differences and Similarities in Solution Structures of Angiotensin I & II: Implication for Structure-Function Relationship


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 300 
  • Conformers Submitted: 21 
  • Selection Criteria: target function for models 1-20, mean energy minimized for model 21 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Comparison of the solution structures of angiotensin I & II. Implication for structure-function relationship.

Spyroulias, G.A.Nikolakopoulou, P.Tzakos, A.Gerothanassis, I.P.Magafa, V.Manessi-Zoupa, E.Cordopatis, P.

(2003) Eur.J.Biochem. 270: 2163-2173

  • Primary Citation of Related Structures:  1N9V

  • PubMed Abstract: 
  • Conformational analysis of angiotensin I (AI) and II (AII) peptides has been performed through 2D 1H-NMR spectroscopy in dimethylsulfoxide and 2,2,2-trifluoroethanol/H2O. The solution structural models of AI and AII have been determined in dimethylsu ...

    Conformational analysis of angiotensin I (AI) and II (AII) peptides has been performed through 2D 1H-NMR spectroscopy in dimethylsulfoxide and 2,2,2-trifluoroethanol/H2O. The solution structural models of AI and AII have been determined in dimethylsulfoxide using NOE distance and 3JHNHalpha coupling constants. Finally, the AI family of models resulting from restrained energy minimization (REM) refinement, exhibits pairwise rmsd values for the family ensemble 0.26 +/- 0.13 A, 1.05 +/- 0.23 A, for backbone and heavy atoms, respectively, and the distance penalty function is calculated at 0.075 +/- 0.006 A2. Comparable results have been afforded for AII ensemble (rmsd values 0.30 +/- 0.22 A, 1.38 +/- 0.48 A for backbone and heavy atoms, respectively; distance penalty function is 0.029 +/- 0.003 A2). The two peptides demonstrate similar N-terminal and different C-terminal conformation as a consequence of the presence/absence of the His9-Leu10 dipeptide, which plays an important role in the different biological function of the two peptides. Other conformational variations focused on the side-chain orientation of aromatic residues, which constitute a biologically relevant hydrophobic core and whose inter-residue contacts are strong in dimethylsulfoxide and are retained even in mixed organic-aqueous media. Detailed analysis of the peptide structural features attempts to elucidate the conformational role of the C-terminal dipeptide to the different binding affinity of AI and AII towards the AT1 receptor and sets the basis for understanding the factors that might govern free- or bound-depended AII structural differentiation.


    Related Citations: 
    • Role of the NH2-terminal domain of angiotensin II (ANG II) and [Sar1]angiotensin II on conformation and activity. NMR evidence for aromatic ring clustering and peptide backbone folding compared with [des-1,2,3]angiotensin II
      Matsoukas, J.M.,Hondrelis, J.,Keramida, M.,Mavromoustakos, T.,Makriyannis, A.,Yamdagni, R.,Wu, Q.,Moore, G.J.
      (1994) J.Biol.Chem. 269: 5303


    Organizational Affiliation

    Department of Pharmacy, University of Patras, Greece. G.A.Spyroulias@upatras.gr




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Angiotensin I
A
10Homo sapiensGene Names: AGT (SERPINA8)
Find proteins for P01019 (Homo sapiens)
Go to Gene View: AGT
Go to UniProtKB:  P01019
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 300 
  • Conformers Submitted: 21 
  • Selection Criteria: target function for models 1-20, mean energy minimized for model 21 
  • Olderado: 1N9U Olderado

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2003-07-29
    Type: Initial release
  • Version 1.1: 2008-04-28
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance
  • Version 1.3: 2016-12-21
    Type: Structure summary