Biological Assembly 1  

 3D View: Structure | 1D-3D View | Electron Density | Validation Report

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 49.90 kDa 
• Atom Count: 3383 
• Modelled Residue Count: 438 
• Deposited Residue Count: 453 
• Unique protein chains: 1

2WXW

Crystal structure of human angiotensinogen

• PDB DOI: 10.2210/pdb2WXW/pdb

• Classification: HORMONE
• Organism(s): Homo sapiens
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): No 


• Deposited: 2009-11-11 Released: 2010-10-20 
• Deposition Author(s): Zhou, A., Wei, Z., Carrell, R.W., Read, R.J.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 3.30 Å
• R-Value Free: 0.318 
• R-Value Work: 0.309 
• R-Value Observed: 0.310 

Literature

A Redox Switch in Angiotensinogen Modulates Angiotensin Release.

Zhou, A., Carrell, R.W., Murphy, M.P., Wei, Z., Yan, Y., Stanley, P.L., Stein, P.E., Pipkin, F.B., Read, R.J.

(2010) Nature 468: 108

• PubMed: 20927107 
• DOI: 10.1038/nature09505
• Primary Citation of Related Structures:  
  2WXW, 2WXX, 2WXY, 2WXZ, 2WY0, 2WY1, 2X0B


• PubMed Abstract: 
  

Blood pressure is critically controlled by angiotensins, which are vasopressor peptides specifically released by the enzyme renin from the tail of angiotensinogen-a non-inhibitory member of the serpin family of protease inhibitors. Although angiotensinogen has long been regarded as a passive substrate, the crystal structures solved here to 2.1 Å resolution show that the angiotensin cleavage site is inaccessibly buried in its amino-terminal tail. The conformational rearrangement that makes this site accessible for proteolysis is revealed in our 4.4 Å structure of the complex of human angiotensinogen with renin. The co-ordinated changes involved are seen to be critically linked by a conserved but labile disulphide bridge. Here we show that the reduced unbridged form of angiotensinogen is present in the circulation in a near 40:60 ratio with the oxidized sulphydryl-bridged form, which preferentially interacts with receptor-bound renin. We propose that this redox-responsive transition of angiotensinogen to a form that will more effectively release angiotensin at a cellular level contributes to the modulation of blood pressure. Specifically, we demonstrate the oxidative switch of angiotensinogen to its more active sulphydryl-bridged form in the maternal circulation in pre-eclampsia-the hypertensive crisis of pregnancy that threatens the health and survival of both mother and child.

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Organizational Affiliation: 

Department of Haematology, Cambridge Institute for Medical Research, University of Cambridge, Hills Road, Cambridge CB2 0XY, UK. [e-mail]

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
ANGIOTENSINOGEN	A	453	Homo sapiens	Mutation(s): 0  Gene Names: AGT, SERPINA8
UniProt & NIH Common Fund Data Resources
Find proteins for P01019 (Homo sapiens) Explore P01019  Go to UniProtKB:  P01019
PHAROS:  P01019 GTEx:  ENSG00000135744

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 3.30 Å
• R-Value Free: 0.318 
• R-Value Work: 0.309 
• R-Value Observed: 0.310 
• Space Group: P 4₁ 2₁ 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 133.285	α = 90
b = 133.285	β = 90
c = 123.602	γ = 90

Software Package:

Software Name	Purpose
REFMAC	refinement
MOSFLM	data reduction
SCALEPACK	data scaling
PHASER	phasing

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2009-11-11 
• Released Date: 2010-10-20 
Deposition Author(s): Zhou, A., Wei, Z., Carrell, R.W., Read, R.J.

Revision History  

• Version 1.0: 2010-10-20
  Type: Initial release
  
• Version 1.1: 2011-05-08
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance