| HOME | HELP | FEEDBACK | SUBSCRIPTIONS | ARCHIVE | SEARCH | TABLE OF CONTENTS |
|
|
|
|||||||
|
|||||||||
1 Departamento de Ecología, Genética y Microbiología, Área de Microbiología, Facultad de Biología, Universidad de León, 24071 León, Spain
2 Departamento de Biología Celular, Facultad de Biología, Universidad de León, 24071 León, Spain
Correspondence
José A. Gil
degjgs{at}unileon.es
Corynebacterium glutamicum is a Gram-positive bacterium that lacks the cell division FtsA protein and actin-like MreB proteins responsible for determining cylindrical cell shape. When the cell division ftsZ gene from C. glutamicum (ftsZCg) was cloned in different multicopy plasmids, the resulting constructions could not be introduced into C. glutamicum; it was assumed that elevated levels of FtsZCg result in lethality. The presence of a truncated ftsZCg and a complete ftsZCg under the control of Plac led to a fourfold reduction in the intracellular levels of FtsZ, generating aberrant cells displaying buds, branches and knots, but no filaments. A 20-fold reduction of the FtsZ level by transformation with a plasmid carrying the Escherichia coli lacI gene dramatically reduced the growth rate of C. glutamicum, and the cells were larger and club-shaped. Immunofluorescence microscopy of FtsZCg or visualization of FtsZCg–GFP in C. glutamicum revealed that most cells showed one fluorescent band, most likely a ring, at the mid-cell, and some cells showed two fluorescent bands (septa of future daughter cells). When FtsZCg–GFP was expressed from Plac, FtsZ rings at mid-cell, or spirals, were also clearly visible in the aberrant cells; however, this morphology was not entirely due to GFP but also to the reduced levels of FtsZ expressed from Plac. Localization of FtsZ at the septum is not negatively regulated by the nucleoid, and therefore the well-known occlusion mechanism seems not to operate in C. glutamicum.
Present address: Departamento de Biología Funcional, Área de Microbiología, Facultad de Medicina, Universidad de Oviedo, 33006 Oviedo, Spain.
This article has been cited by other articles:
|
|
 |
|
  Y. Tsuge, H. Ogino, H. Teramoto, M. Inui, and H. Yukawa Deletion of cgR_1596 and cgR_2070, Encoding NlpC/P60 Proteins, Causes a Defect in Cell Separation in Corynebacterium glutamicum R J. Bacteriol., December 15, 2008; 190(24): 8204 - 8214. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 M. Fiuza, M. J. Canova, I. Zanella-Cleon, M. Becchi, A. J. Cozzone, L. M. Mateos, L. Kremer, J. A. Gil, and V. Molle From the Characterization of the Four Serine/Threonine Protein Kinases (PknA/B/G/L) of Corynebacterium glutamicum toward the Role of PknA and PknB in Cell Division J. Biol. Chem., June 27, 2008; 283(26): 18099 - 18112. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
M. Letek, E. Ordonez, J. Vaquera, W. Margolin, K. Flardh, L. M. Mateos, and J. A. Gil DivIVA Is Required for Polar Growth in the MreB-Lacking Rod-Shaped Actinomycete Corynebacterium glutamicum J. Bacteriol., May 1, 2008; 190(9): 3283 - 3292. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 E. C. Hett and E. J. Rubin Bacterial Growth and Cell Division: a Mycobacterial Perspective Microbiol. Mol. Biol. Rev., March 1, 2008; 72(1): 126 - 156. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 N. Valbuena, M. Letek, A. Ramos, J. Ayala, D. Nakunst, J. Kalinowski, L. M. Mateos, and J. A. Gil Morphological changes and proteome response of Corynebacterium glutamicum to a partial depletion of FtsI. Microbiology, August 1, 2006; 152(Pt 8): 2491 - 2503. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
M. Letek, N. Valbuena, A. Ramos, E. Ordonez, J. A. Gil, and L. M. Mateos Characterization and Use of Catabolite-Repressed Promoters from Gluconate Genes in Corynebacterium glutamicum J. Bacteriol., January 15, 2006; 188(2): 409 - 423. [Abstract] [Full Text] [PDF]
|
|
| HOME | HELP | FEEDBACK | SUBSCRIPTIONS | ARCHIVE | SEARCH | TABLE OF CONTENTS |
| INT J SYST EVOL MICROBIOL | MICROBIOLOGY | J GEN VIROL |
| J MED MICROBIOL | ALL SGM JOURNALS | |
