1BSR

BOVINE SEMINAL RIBONUCLEASE STRUCTURE AT 1.9 ANGSTROMS RESOLUTION


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.9 Å
  • R-Value Work: 0.177 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Bovine seminal ribonuclease: structure at 1.9 A resolution.

Mazzarella, L.Capasso, S.Demasi, D.Di Lorenzo, G.Mattia, C.A.Zagari, A.

(1993) Acta Crystallogr.,Sect.D 49: 389-402

  • DOI: 10.1107/S0907444993003403
  • Also Cited By: 3BCM, 3BCO, 3BCP

  • PubMed Abstract: 
  • The crystal structure of bovine seminal ribonuclease, a homodimeric enzyme closely related to pancreatic ribonuclease, has been refined at a nominal resolution of 1.9 A employing data collected on an electronic area detector. The final model consists ...

    The crystal structure of bovine seminal ribonuclease, a homodimeric enzyme closely related to pancreatic ribonuclease, has been refined at a nominal resolution of 1.9 A employing data collected on an electronic area detector. The final model consists of two chains containing 1990 non-H atoms, seven sulfate anions and 113 water molecules per asymmetric unit. The unit-cell parameters are a = 36.5 (1), b = 66.7 (1) and c = 107.5 (2) A, space group P22(1)2(1). The R factor is 0.177 for 16 492 reflections in the resolution range 6.0-1.9 A and the deviations from ideal values of bond lengths and bond angles are 0.020 A and 3.7 degrees, respectively. The molecule is formed by two pancreatic like chains, which have their N-terminal segments interchanged so that each active site is formed by residues from both subunits. The two chains are related by a non-crystallographic twofold symmetry and are covalently linked by two consecutive disulfide bridges, which form an unusual sixteen-membered ring across the dimer interface. The deviations from the molecular symmetry, the hydration shell and the sulfate-binding sites are also discussed in relation to the known structure of the pancreatic enzyme.


    Related Citations: 
    • Composite Active Sites in Bovine Seminal Ribonuclease
      Mazzarella, L.,Mattia, C.A.,Capasso, S.,Di Lorenzo, G.
      (1987) Gazz.Chim.Ital. 117: 91
    • Refinement of the Structure of Bovine Seminal Ribonuclease
      Capasso, S.,Giordano, F.,Mattia, C.A.,Mazzarella, L.,Zagari, A.
      (1983) Biopolymers 22: 327
    • Low-Resolution Structure of Bovine Seminal Ribonuclease: A Covalent Dimeric Protein
      Capasso, S.,Giordano, F.,Mattia, C.A.,Mazzarella, L.,Zagari, A.
      (1979) Gazz.Chim.Ital. 109: 55


    Organizational Affiliation

    Dipartimento di Chimica, Università Federico II, Napoli, Italy.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
BOVINE SEMINAL RIBONUCLEASE
A, B
124Bos taurusGene Names: SRN
EC: 3.1.27.5
Find proteins for P00669 (Bos taurus)
Go to UniProtKB:  P00669
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download SDF File 
Download CCD File 
A, B
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.9 Å
  • R-Value Work: 0.177 
  • Space Group: P 2 21 21
Unit Cell:
Length (Å)Angle (°)
a = 36.500α = 90.00
b = 66.700β = 90.00
c = 107.500γ = 90.00
Software Package:
Software NamePurpose
X-PLORphasing
X-PLORrefinement
X-PLORmodel building

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 1993-04-28 
  • Released Date: 1993-10-31 
  • Deposition Author(s): Mazzarella, L.

Revision History 

  • Version 1.0: 1993-10-31
    Type: Initial release
  • Version 1.1: 2008-03-03
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance
  • Version 1.3: 2011-11-16
    Type: Atomic model