1I0V

Ribonuclease T1 in complex with 2'GMP (form I crystal)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.234 Å
  • R-Value Free: 0.192 
  • R-Value Work: 0.178 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

The contribution of metal ions to the conformational stability of ribonuclease T1: crystal versus solution.

Deswarte, J.De Vos, S.Langhorst, U.Steyaert, J.Loris, R.

(2001) Eur.J.Biochem. 268: 3993-4000

  • Primary Citation of Related Structures:  1HYF, 1HZ1, 1I0X

  • PubMed Abstract: 
  • In the crystalline state, ribonuclease T1 binds calcium ions at different lattice-dependent positions. In solution, its conformational stability is also remarkably increased in the presence of divalent metal ions. Combining urea unfolding studies and ...

    In the crystalline state, ribonuclease T1 binds calcium ions at different lattice-dependent positions. In solution, its conformational stability is also remarkably increased in the presence of divalent metal ions. Combining urea unfolding studies and X-ray crystallography, we compared the presence of several metal ions at specific sites in the protein to their contribution to the overall stabilizing effect in solution. We constructed thermodynamic cycles involving particular metal ions and specific carboxylate functions. The resulting coupling energies indicate that some (but not all) metal ions found at lattice contacts in crystal structures may indeed significantly contribute to stability enhancement in the presence of metal ions in solution.


    Organizational Affiliation

    Laboratorium voor Ultrastructuur, Vlaams Interuniversitair Instituut voor Biotechnologie, Vrije Universiteit Brussel, Belgium.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
GUANYL-SPECIFIC RIBONUCLEASE T1
A
104Aspergillus oryzae (strain ATCC 42149 / RIB 40)Gene Names: rntA
EC: 3.1.27.3
Find proteins for P00651 (Aspergillus oryzae (strain ATCC 42149 / RIB 40))
Go to UniProtKB:  P00651
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CA
Query on CA

Download SDF File 
Download CCD File 
A
CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
2GP
Query on 2GP

Download SDF File 
Download CCD File 
A
GUANOSINE-2'-MONOPHOSPHATE
C10 H14 N5 O8 P
WTIFIAZWCCBCGE-UUOKFMHZSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.234 Å
  • R-Value Free: 0.192 
  • R-Value Work: 0.178 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 40.321α = 90.00
b = 47.609β = 90.00
c = 50.541γ = 90.00
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
CNSrefinement
AMoREphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2001-02-14
    Type: Initial release
  • Version 1.1: 2008-04-27
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance