1A4Y

RIBONUCLEASE INHIBITOR-ANGIOGENIN COMPLEX


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2 Å
  • R-Value Free: 0.286 
  • R-Value Work: 0.193 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Molecular recognition of human angiogenin by placental ribonuclease inhibitor--an X-ray crystallographic study at 2.0 A resolution.

Papageorgiou, A.C.Shapiro, R.Acharya, K.R.

(1997) EMBO J. 16: 5162-5177

  • DOI: 10.1093/emboj/16.17.5162

  • PubMed Abstract: 
  • Human placental RNase inhibitor (hRI), a leucine-rich repeat protein, binds the blood vessel-inducing protein human angiogenin (Ang) with extraordinary affinity (Ki <1 fM). Here we report a 2.0 A resolution crystal structure for the hRI-Ang complex t ...

    Human placental RNase inhibitor (hRI), a leucine-rich repeat protein, binds the blood vessel-inducing protein human angiogenin (Ang) with extraordinary affinity (Ki <1 fM). Here we report a 2.0 A resolution crystal structure for the hRI-Ang complex that, together with extensive mutagenesis data from earlier studies, reveals the molecular features of this tight interaction. The hRI-Ang binding interface is large and encompasses 26 residues from hRI and 24 from Ang, recruited from multiple domains of both proteins. However, a substantial fraction of the energetically important contacts involve only a single region of each: the C-terminal segment 434-460 of hRI and the ribonucleolytic active centre of Ang, most notably the catalytic residue Lys40. Although the overall docking of Ang resembles that observed for RNase A in the crystal structure of its complex with the porcine RNase inhibitor, the vast majority of the interactions in the two complexes are distinctive, indicating that the broad specificity of the inhibitor for pancreatic RNase superfamily proteins is based largely on its capacity to recognize features unique to each of them. The implications of these findings for the development of small, hRI-based inhibitors of Ang for therapeutic use are discussed.


    Organizational Affiliation

    Department of Biology and Biochemistry, University of Bath, Claverton Down, Bath BA2 7AY, UK.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
RIBONUCLEASE INHIBITOR
A, D
460Homo sapiensMutation(s): 0 
Gene Names: RNH1 (PRI, RNH)
Find proteins for P13489 (Homo sapiens)
Go to Gene View: RNH1
Go to UniProtKB:  P13489
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
ANGIOGENIN
B, E
123Homo sapiensMutation(s): 0 
Gene Names: ANG (RNASE5)
EC: 3.1.27.-
Find proteins for P03950 (Homo sapiens)
Go to Gene View: ANG
Go to UniProtKB:  P03950
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2 Å
  • R-Value Free: 0.286 
  • R-Value Work: 0.193 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 66.553α = 90.00
b = 105.605β = 107.09
c = 93.516γ = 90.00
Software Package:
Software NamePurpose
X-PLORmodel building
SCALAdata scaling
DENZOdata reduction
X-PLORrefinement
XDSdata scaling
CCP4data scaling
XDSdata reduction
X-PLORphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1998-10-14
    Type: Initial release
  • Version 1.1: 2008-03-24
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance