title: A NAC for regulating metabolism: the nitrogen assimilation control protein (NAC) from Klebsiella pneumoniae.
abstract: The nitrogen assimilation control protein (NAC) is a LysR-type transcriptional regulator (LTTR) that is made under conditions of nitrogen-limited growth. NAC's synthesis is entirely dependent on phosphorylated NtrC from the two-component Ntr system and requires the unusual sigma factor σ54 for transcription of the nac gene. NAC activates the transcription of σ70-dependent genes whose products provide the cell with ammonia or glutamate. NAC represses genes whose products use ammonia and also represses its own transcription. In addition, NAC also subtly adjusts other cellular functions to keep pace with the supply of biosynthetically available nitrogen.
authors.affiliation: Department of Molecular, Cellular, and Developmental Biology, the University of Michigan, Ann Arbor, MI 48109-1048, USA. rbender@umich.edu
authors.forename: Robert A
authors.initials: RA
authors.lastname: Bender
mesh_terms: D001426:Bacterial Proteins / Q000235:genetics / Q000378:metabolism*; D015964:Gene Expression Regulation, Bacterial; D007711:Klebsiella pneumoniae / Q000235:genetics / Q000378:metabolism*; D008954:Models, Biological; D009876:Operon / Q000235:genetics; D051922:PII Nitrogen Regulatory Proteins / Q000235:genetics / Q000378:metabolism*; D018085:Regulon / Q000235:genetics; D014157:Transcription Factors / Q000235:genetics / Q000378:metabolism*
chemical_list: D001426:Bacterial Proteins; D051922:PII Nitrogen Regulatory Proteins; D014157:Transcription Factors