3CM1

Crystal structure of SsgA-like sporulation-specific cell division protein (YP_290167.1) from Thermobifida fusca YX-ER1 at 2.60 A resolution


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.6 Å
  • R-Value Free: 0.270 
  • R-Value Work: 0.230 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structural and functional characterizations of SsgB, a conserved activator of developmental cell division in morphologically complex actinomycetes.

Xu, Q.Traag, B.A.Willemse, J.McMullan, D.Miller, M.D.Elsliger, M.A.Abdubek, P.Astakhova, T.Axelrod, H.L.Bakolitsa, C.Carlton, D.Chen, C.Chiu, H.J.Chruszcz, M.Clayton, T.Das, D.Deller, M.C.Duan, L.Ellrott, K.Ernst, D.Farr, C.L.Feuerhelm, J.Grant, J.C.Grzechnik, A.Grzechnik, S.K.Han, G.W.Jaroszewski, L.Jin, K.K.Klock, H.E.Knuth, M.W.Kozbial, P.Krishna, S.S.Kumar, A.Marciano, D.Minor, W.Mommaas, A.M.Morse, A.T.Nigoghossian, E.Nopakun, A.Okach, L.Oommachen, S.Paulsen, J.Puckett, C.Reyes, R.Rife, C.L.Sefcovic, N.Tien, H.J.Trame, C.B.van den Bedem, H.Wang, S.Weekes, D.Hodgson, K.O.Wooley, J.Deacon, A.M.Godzik, A.Lesley, S.A.Wilson, I.A.van Wezel, G.P.

(2009) J.Biol.Chem. 284: 25268-25279

  • DOI: 10.1074/jbc.M109.018564

  • PubMed Abstract: 
  • SsgA-like proteins (SALPs) are a family of homologous cell division-related proteins that occur exclusively in morphologically complex actinomycetes. We show that SsgB, a subfamily of SALPs, is the archetypal SALP that is functionally conserved in al ...

    SsgA-like proteins (SALPs) are a family of homologous cell division-related proteins that occur exclusively in morphologically complex actinomycetes. We show that SsgB, a subfamily of SALPs, is the archetypal SALP that is functionally conserved in all sporulating actinomycetes. Sporulation-specific cell division of Streptomyces coelicolor ssgB mutants is restored by introduction of distant ssgB orthologues from other actinomycetes. Interestingly, the number of septa (and spores) of the complemented null mutants is dictated by the specific ssgB orthologue that is expressed. The crystal structure of the SsgB from Thermobifida fusca was determined at 2.6 A resolution and represents the first structure for this family. The structure revealed similarities to a class of eukaryotic "whirly" single-stranded DNA/RNA-binding proteins. However, the electro-negative surface of the SALPs suggests that neither SsgB nor any of the other SALPs are likely to interact with nucleotide substrates. Instead, we show that a conserved hydrophobic surface is likely to be important for SALP function and suggest that proteins are the likely binding partners.


    Organizational Affiliation

    Joint Center for Structural Genomics, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
SsgA-like sporulation-specific cell division protein
A, B, C
139Thermobifida fusca (strain YX)Gene Names: ssgB
Find proteins for Q47N25 (Thermobifida fusca (strain YX))
Go to UniProtKB:  Q47N25
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
MSE
Query on MSE
A, B, C
L-PEPTIDE LINKINGC5 H11 N O2 SeMET
Experimental Data & Validation

Experimental Data

Unit Cell:
Length (Å)Angle (°)
a = 64.840α = 90.00
b = 64.840β = 90.00
c = 130.600γ = 90.00
Software Package:
Software NamePurpose
SHELXDphasing
PDB_EXTRACTdata extraction
SHELXphasing
XDSdata reduction
MolProbitymodel building
XSCALEdata scaling
MAR345data collection
autoSHARPphasing
PHENIXrefinement
REFMACrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2008-04-01
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Advisory, Source and taxonomy, Version format compliance
  • Version 1.2: 2017-10-25
    Type: Refinement description