1NSO

Folded monomer of protease from Mason-Pfizer monkey virus


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 10 
  • Selection Criteria: structures with the least restraint violations 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Three-dimensional structure of a monomeric form of a retroviral protease

Veverka, V.Bauerova, H.Zabransky, A.Lang, J.Ruml, T.Pichova, I.Hrabal, R.

(2003) J.MOL.BIOL. 333: 771-780

  • Also Cited By: 3SQF

  • PubMed Abstract: 
  • The assembly of Mason-Pfizer monkey virus Gag polyproteins into immature capsids and their cleavage by the encoded protease are temporally and spatially separated processes, making the virus a particularly useful model for investigation of protease a ...

    The assembly of Mason-Pfizer monkey virus Gag polyproteins into immature capsids and their cleavage by the encoded protease are temporally and spatially separated processes, making the virus a particularly useful model for investigation of protease activation. Here we present a high resolution NMR structure of a fully folded monomer of a 12 kDa M-PMV protease (wt 12 PR) and of a Cys7Ala/Asp26Asn/Cys106Ala mutant (12 PR(D26N/C7A/C106A)). The overall structures of both wt 12 PR and 12 PR(D26N/C7A/C106A) follow the conservative structural motif of other retroviral proteases. The most prominent difference from the canonical fold of retroviral proteases is the absence of the interfacial beta-sheet, which leads to the loss of the principal force stabilizing the dimer of M-PMV PR. The monomer-dimer equilibrium can be shifted in favor of the dimer by adding a substrate or an inhibitor, partially compensating for the missing role of the beta-sheet. We also show that cysteines C7 and C106 play a crucial role in stabilizing the dimer and consequently increasing the proteolytic activity of M-PMV PR. This is consistent with the role of reversible oxidative modification of the cysteine residues in the regulation of the maturation of assembled M-PMV capsids in the cytoplasm.


    Organizational Affiliation

    NMR Laboratory, Institute of Chemical Technology in Prague, Technick√°, 5, Prague CZ-166 28, Czech Republic.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
PROTEASE
A
107Mason-Pfizer monkey virusGene Names: pro
EC: 3.4.23.-
Find proteins for P07570 (Mason-Pfizer monkey virus)
Go to UniProtKB:  P07570
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 10 
  • Selection Criteria: structures with the least restraint violations 
  • Olderado: 1NSO Olderado

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2003-02-18
    Type: Initial release
  • Version 1.1: 2008-04-29
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance