5M3X

Crystal structure of human angiotensin I-deleted angiotensinogen


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.63 Å
  • R-Value Free: 0.282 
  • R-Value Work: 0.242 
  • R-Value Observed: 0.244 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Structural basis for the specificity of renin-mediated angiotensinogen cleavage.

Yan, Y.Zhou, A.Carrell, R.W.Read, R.J.

(2019) J Biol Chem 294: 2353-2364

  • DOI: 10.1074/jbc.RA118.006608
  • Primary Citation of Related Structures:  
    5M3X, 5M3Y, 6I3I, 6I3F

  • PubMed Abstract: 
  • The renin-angiotensin cascade is a hormone system that regulates blood pressure and fluid balance. Renin-mediated cleavage of the angiotensin I peptide from the N terminus of angiotensinogen (AGT) is the rate-limiting step of this cascade; however, t ...

    The renin-angiotensin cascade is a hormone system that regulates blood pressure and fluid balance. Renin-mediated cleavage of the angiotensin I peptide from the N terminus of angiotensinogen (AGT) is the rate-limiting step of this cascade; however, the detailed molecular mechanism underlying this step is unclear. Here, we solved the crystal structures of glycosylated human AGT (2.30 Å resolution), its encounter complex with renin (2.55 Å), AGT cleaved in its reactive center loop (RCL; 2.97 Å), and spent AGT from which the N-terminal angiotensin peptide was removed (2.63 Å). These structures revealed that AGT undergoes profound conformational changes and binds renin through a tail-into-mouth allosteric mechanism that inserts the N terminus into a pocket equivalent to a hormone-binding site on other serpins. These changes fully extended the N-terminal tail, with the scissile bond for angiotensin release docked in renin's active site. Insertion of the N terminus into this pocket accompanied a complete unwinding of helix H of AGT, which, in turn, formed key interactions with renin in the complementary binding interface. Mutagenesis and kinetic analyses confirmed that renin-mediated production of angiotensin I is controlled by interactions of amino acid residues and glycan components outside renin's active-site cleft. Our findings indicate that AGT adapts unique serpin features for hormone delivery and binds renin through concerted movements in the N-terminal tail and in its main body to modulate angiotensin release. These insights provide a structural basis for the development of agents that attenuate angiotensin release by targeting AGT's hormone binding pocket.


    Organizational Affiliation

    From the Department of Haematology, University of Cambridge, Cambridge Institute for Medical Research, Wellcome Trust/MRC Building, Hills Road, Cambridge CB2 0XY, United Kingdom and rjr27@cam.ac.uk.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
AngiotensinogenAB448Homo sapiensMutation(s): 5 
Gene Names: AGTSERPINA8
Find proteins for P01019 (Homo sapiens)
Explore P01019 
Go to UniProtKB:  P01019
NIH Common Fund Data Resources
PHAROS  P01019
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.63 Å
  • R-Value Free: 0.282 
  • R-Value Work: 0.242 
  • R-Value Observed: 0.244 
  • Space Group: P 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 86.3α = 90
b = 41.04β = 107.82
c = 129.95γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
XDSdata reduction
Aimlessdata scaling
PHASERphasing

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data

  • Deposited Date: 2016-10-17 
  • Released Date: 2017-12-20 
  • Deposition Author(s): Yan, Y., Read, R.J.

Funding OrganizationLocationGrant Number
British Heart FoundationUnited KingdomPG/12/41/29679
Wellcome TrustUnited Kingdom082961/Z/07/Z

Revision History 

  • Version 1.0: 2017-12-20
    Type: Initial release
  • Version 1.1: 2019-01-23
    Changes: Data collection, Database references
  • Version 1.2: 2019-02-27
    Changes: Data collection, Database references