4G1J

Sortase C1 of GBS Pilus Island 1


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.75 Å
  • R-Value Free: 0.202 
  • R-Value Work: 0.172 

wwPDB Validation 3D Report Full Report


This is version 1.0 of the entry. See complete history

Literature

Structural basis for group B streptococcus pilus 1 sortases C regulation and specificity.

Cozzi, R.Prigozhin, D.Rosini, R.Abate, F.Bottomley, M.J.Grandi, G.Telford, J.L.Rinaudo, C.D.Maione, D.Alber, T.

(2012) Plos One 7: e49048-e49048

  • DOI: 10.1371/journal.pone.0049048
  • Primary Citation of Related Structures:  4G1H

  • PubMed Abstract: 
  • Gram-positive bacteria assemble pili through class C sortase enzymes specialized in polymerizing pilin subunits into covalently linked, high-molecular-weight, elongated structures. Here we report the crystal structures of two class C sortases (SrtC1 ...

    Gram-positive bacteria assemble pili through class C sortase enzymes specialized in polymerizing pilin subunits into covalently linked, high-molecular-weight, elongated structures. Here we report the crystal structures of two class C sortases (SrtC1 and SrtC2) from Group B Streptococcus (GBS) Pilus Island 1. The structures show that both sortases are comprised of two domains: an 8-stranded β-barrel catalytic core conserved among all sortase family members and a flexible N-terminal region made of two α-helices followed by a loop, known as the lid, which acts as a pseudo-substrate. In vitro experiments performed with recombinant SrtC enzymes lacking the N-terminal portion demonstrate that this region of the enzyme is dispensable for catalysis but may have key roles in substrate specificity and regulation. Moreover, in vitro FRET-based assays show that the LPXTG motif common to many sortase substrates is not the sole determinant of sortase C specificity during pilin protein recognition.


    Organizational Affiliation

    Novartis Vaccines and Diagnostics, Siena, Italy.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Sortase family protein
A, B
222Streptococcus agalactiae serotype V (strain ATCC BAA-611 / 2603 V/R)N/A
Find proteins for Q8E0S7 (Streptococcus agalactiae serotype V (strain ATCC BAA-611 / 2603 V/R))
Go to UniProtKB:  Q8E0S7
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.75 Å
  • R-Value Free: 0.202 
  • R-Value Work: 0.172 
  • Space Group: P 1
Unit Cell:
Length (Å)Angle (°)
a = 38.977α = 87.31
b = 48.467β = 76.85
c = 59.369γ = 72.64
Software Package:
Software NamePurpose
HKL-2000data scaling
PHENIXrefinement
PHENIXmodel building
HKL-2000data reduction
PHENIXphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2012-12-05
    Type: Initial release