1QWQ

Solution structure of the monomeric N67D mutant of Bovine Seminal Ribonuclease


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 40 
  • Conformers Submitted: 16 
  • Selection Criteria: structures with the lowest energy 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

THE SWAPPING OF TERMINAL ARMS IN RIBONUCLEASES: COMPARISON OF THE SOLUTION STRUCTURE OF MONOMERIC BOVINE SEMINAL AND PANCREATIC RIBONUCLEASES

Avitabile, F.Alfano, C.Spadaccini, R.Crescenzi, O.D'Ursi, A.M.D'Alessio, G.Tancredi, T.Picone, D.

(2003) Biochemistry 42: 8704-8711

  • DOI: 10.1021/bi0342517

  • PubMed Abstract: 
  • Bovine seminal ribonuclease (BS-RNase), the only dimeric protein among the pancreatic-like ribonucleases, is endowed with special structural features and with biological functions beyond enzymatic activity. In solution, the protein exists as an equil ...

    Bovine seminal ribonuclease (BS-RNase), the only dimeric protein among the pancreatic-like ribonucleases, is endowed with special structural features and with biological functions beyond enzymatic activity. In solution, the protein exists as an equilibrium mixture of two forms, with or without exchange (or swapping) of the N-terminal arms. After selective reduction and alkylation of the two intrachain disulfide bridges, the dimeric protein can be transformed into a monomeric derivative that has a ribonuclease activity higher than that of the parent dimeric protein but is devoid of the special biological functions. A detailed investigation of the structural features of this protein in solution, in comparison with those of other monomeric ribonucleases, may help unveil the structural details which induce swapping of the N-terminal arms of BS-RNase. The solution structure of the recombinant monomeric form of BS-RNase, as determined by 3D heteronuclear NMR, shows close similarity with that of bovine pancreatic ribonuclease (RNase A) in all regions characterized by regular elements of secondary structure. However, significant differences are present in the flexible regions, which could account for the different behavior of the two proteins. To characterize in detail these regions, we have measured H/D exchange rate constants, temperature coefficients and heteronuclear NOEs of backbone amides for both RNase A and monomeric BS-RNase. The results indicate a large difference in the backbone flexibility of the hinge peptide segment 16-22 of the two proteins, which could provide the molecular basis to explain the ability of BS-RNase subunits to swap their N-terminal arms.


    Related Citations: 
    • 1H and 15N sequential assignment and secondary structure of the monomeric N67D mutant of bovine seminal ribonuclease.
      Crescenzi, O.,Carotenuto, A.,D'Ursi, A.M.,Tancredi, T.,D'Alessio, G.,Avitabile, F.,Picone, D.
      (2001) J.BIOMOL.NMR 20: 289


    Organizational Affiliation

    Dipartimento di Chimica, Università di Napoli Federico II, Via Cintia, 80126 Napoli, Italy.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Ribonuclease
A
124Bos taurusMutation(s): 1 
Gene Names: SRN
EC: 3.1.27.5
Find proteins for P00669 (Bos taurus)
Go to UniProtKB:  P00669
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 40 
  • Conformers Submitted: 16 
  • Selection Criteria: structures with the lowest energy 
  • Olderado: 1QWQ Olderado

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2003-09-16
    Type: Initial release
  • Version 1.1: 2008-04-29
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance