1XPS

BOVINE RIBONUCLEASE A (PHOSPHATE-FREE) (93 % HUMIDITY)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.8 Å
  • R-Value Free: 0.248 
  • R-Value Work: 0.175 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Plasticity, hydration and accessibility in ribonuclease A. The structure of a new crystal form and its low-humidity variant.

Sadasivan, C.Nagendra, H.G.Vijayan, M.

(1998) Acta Crystallogr.,Sect.D 54: 1343-1352

  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • The structures of a new crystal form of ribonuclease A and its low-humidity variant, each containing two crystallographically independent molecules, have been determined and refined. A detailed comparison of these structures with those of the other k ...

    The structures of a new crystal form of ribonuclease A and its low-humidity variant, each containing two crystallographically independent molecules, have been determined and refined. A detailed comparison of these structures with those of the other known crystal forms of the enzyme, which have different packing arrangements and solvent composition, leads to a meaningful delineation of the rigid and flexible regions of the protein molecule and the nature of its plasticity. Many of the water molecules which are common to all the structures are involved in bridging different regions of the protein molecule, thus emphasizing the role of water in stabilizing the tertiary structure. The analysis of the structures shows that for a given N or O atom, the level of hydration increases with accessible surface area, but levels off at an area of about 10 A2. Generally, the hydration level tends to drop when the area increases beyond about 20 A2. This drop correlates with an increase in the displacement parameter. The analysis also suggests that the van der Waals radii and probe radius normally used in accessible surface area calculations are not appropriate for dealing with all situations.


    Related Citations: 
    • Water-Dependent Domain Motion and Flexibility in Ribonuclease A and the Invariant Features in its Hydration Shell. An X-Ray Study of Two Low-Humidity Crystal Forms of the Enzyme
      Kishan, K.V.R.,Chandra, N.R.,Sudarsanakumar, C.,Suguna, K.,Vijayan, M.
      (1995) Acta Crystallogr.,Sect.D 51: 703


    Organizational Affiliation

    Molecular Biophysics Unit, Indian Institute of Science, Bangalore 560 012, India.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
RIBONUCLEASE A
A, B
124Bos taurusMutation(s): 0 
Gene Names: RNASE1 (RNS1)
EC: 4.6.1.18
Find proteins for P61823 (Bos taurus)
Go to Gene View: RNASE1
Go to UniProtKB:  P61823
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.8 Å
  • R-Value Free: 0.248 
  • R-Value Work: 0.175 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 33.490α = 90.00
b = 106.200β = 101.96
c = 30.550γ = 90.00
Software Package:
Software NamePurpose
X-PLORmodel building
X-PLORrefinement
X-PLORphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1998-05-27
    Type: Initial release
  • Version 1.1: 2008-03-24
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance