Domain architecture and structure of the bacterial cell division protein DivIB.Robson, S.A., King, G.F.
(2006) Proc.Natl.Acad.Sci.USA 103: 6700-6705
- PubMed: 16618922
- DOI: 10.1073/pnas.0601397103
- Primary Citation of Related Structures:
- PubMed Abstract:
- Cloning and expression of a Bacillus subtilis division initiation gene for which a homolog has not been identified in another organism
Harry, E.J.,Wake, R.G.
(1989) J.Bacteriol. 171: 6835
- Membrane-bound division proteins DivIB and DivIC of Bacillus subtilis function solely through their external domains in both vegetative and sporulation division.
Katis, V.L.,Wake, R.G.
(1999) J.Bacteriol. 181: 2710
- Nucleotide sequence and insertional inactivation of a Bacillus subtilis gene that affects cell division, sporulation, and temperature sensitivity.
Beall, B.,Lutkenhaus, J.
(1989) J.Bacteriol. 171: 6821
- DivIB, FtsZ and cell division in Bacillus subtilis.
Rowland, S.L.,Katis, V.L.,Partridge, S.R.,Wake, R.G.
(1997) Mol.Microbiol. 25: 275
Bacterial cytokinesis requires the coordinated assembly of a complex of proteins, collectively known as the divisome, at the incipient division site. DivIB/FtsQ is a conserved component of the divisome in bacteria with cell walls, suggesting that it ...
Bacterial cytokinesis requires the coordinated assembly of a complex of proteins, collectively known as the divisome, at the incipient division site. DivIB/FtsQ is a conserved component of the divisome in bacteria with cell walls, suggesting that it plays a role in synthesis and/or remodeling of septal peptidoglycan. We demonstrate that the extracytoplasmic region of DivIB comprises three discrete domains that we designate alpha, beta, and gamma from the N to C terminus. The alpha-domain is proximal to the cytoplasmic membrane and coincident with the polypeptide transport-associated domain that was proposed previously to function as a molecular chaperone. The beta-domain has a unique 3D fold, with no eukaryotic counterpart, and we show that it interconverts between two discrete conformations via cis-trans isomerization of a Tyr-Pro peptide bond. We propose that this isomerization might modulate protein-protein interactions of the flanking alpha- and gamma-domains. The C-terminal gamma-domain is unstructured in the absence of other divisomal proteins, but we show that it is critical for DivIB function.
Department of Molecular, Microbial, and Structural Biology and Partnership for Excellence in Structural Biology, University of Connecticut Health Center, 263 Farmington Avenue, Farmington, CT 06030-3305, USA.