1XHH

Solution Structure of porcine beta-microseminoprotein


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 20 
  • 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

Novel solution structure of porcine beta-microseminoprotein

Wang, I.Lou, Y.C.Wu, K.P.Wu, S.H.Chang, W.C.Chen, C.

(2005) J.Mol.Biol. 346: 1071-1082

  • DOI: 10.1016/j.jmb.2004.12.029

  • PubMed Abstract: 
  • A number of beta-microseminoproteins (MSPs) have been identified from different species. MSPs are all non-glycosylated and disulfide bond-rich, but show a relatively low level of conservation. Although all Cys residues are conserved, our previous stu ...

    A number of beta-microseminoproteins (MSPs) have been identified from different species. MSPs are all non-glycosylated and disulfide bond-rich, but show a relatively low level of conservation. Although all Cys residues are conserved, our previous study showed that the disulfide bond pairings differ in porcine and ostrich MSPs. Despite the variety of biological functions that have been suggested for MSPs, their real function is still poorly understood. Furthermore, no 3D structure has been reported for any MSP, so the determination of the structure and function of MSPs is an interesting and important task. In the present study, we determined the 3D solution structure of porcine MSP on the basis of 1018 restraints. The ensemble of 20 NMR structures was well defined, with average root-mean-square deviations of 0.83(+/-0.16) A for the backbone atoms and 1.37(+/-0.17) A for heavy-atoms in residues 2-90. The 3D structure showed that porcine MSP is clearly composed of two domains, an N-terminal domain consisting of one double-stranded and one four-stranded antiparallel beta-sheet, and a C-terminal domain consisting of two double-stranded antiparallel beta-sheet. The orientation of the two domains was derived mainly on the basis of long-range NOEs and verified using residual dipolar coupling data. No inter-domain hydrophobic interaction or H-bonding was detected. However, a number of charged residues were found in close proximity between the domains, indicating that electrostatic interaction may be the key factor for the orientation of the two domains. This is the first report of a 3D structure for any MSP. In addition, structural comparison based on distance matrix alignment (DALI), class architecture topology and homologous superfamily (CATH) and combinatorial extension (CE) methods revealed that porcine MSP has a novel structure with a new fold providing valuable information for future structural studies on other MSPs and for understanding their biological functions.


    Organizational Affiliation

    Institute of Biomedical Sciences, Academia Sinica, Taipei 115, Taiwan, ROC.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
beta-microseminoprotein
A
91Sus scrofaMutation(s): 0 
Gene Names: MSMB (PSP94)
Find proteins for O02826 (Sus scrofa)
Go to Gene View: MSMB
Go to UniProtKB:  O02826
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 20 
  • Selection Criteria: structures with the lowest energy 
  • Olderado: 1XHH Olderado

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2005-03-20
    Type: Initial release
  • Version 1.1: 2008-04-30
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance