Nitrogen control in Corynebacterium glutamicum: proteins, mechanisms, signals.
In order to utilize different nitrogen sources and to survive in a situation of nitrogen limitation, microorganisms have developed sophisticated mechanisms to adapt their metabolism to a changing nitrogen supply. In this communication, the recent knowledge of nitrogen regulation in the amino acid producer Corynebacterium glutamicum is summarized. The core adaptations of C. glutamicum to nitrogen limitation on the level of transcription are controlled by the global regulator AmtR. Further components of the signal pathway are GlnK, a P(II)-type signal transduction protein, and GlnD. Mechanisms involved in nitrogen control in C. glutamicum regulating gene expression and protein activity are repression of transcription, protein-complex formation, protein modification by adenylylation, change of intracellular localization, and proteolysis.
Lehrstuhl für Mikrobiologie, Friedrich-Alexander-Universität Erlangen-Nürnberg, Staudtstr 5, 91058 Erlangen, Germany. aburkov@biologie.uni-erlangen.de
Andreas
A
Burkovski
D001426:Bacterial Proteins / Q000235:genetics / Q000502:physiology*; D048230:Corynebacterium glutamicum / Q000378:metabolism*; D009584:Nitrogen / Q000378:metabolism*; D051922:PII Nitrogen Regulatory Proteins / Q000502:physiology; D000644:Quaternary Ammonium Compounds / Q000378:metabolism; D018085:Regulon; D012097:Repressor Proteins / Q000235:genetics / Q000502:physiology*; D015398:Signal Transduction
C414398:AmtR protein, Corynebacterium glutamicum; D001426:Bacterial Proteins; D051922:PII Nitrogen Regulatory Proteins; D000644:Quaternary Ammonium Compounds; D012097:Repressor Proteins; D009584:Nitrogen