Glutamate at the site of phosphorylation of nitrogen-regulatory protein NTRC mimics aspartyl-phosphate and activates the protein

KE Klose, DS Weiss, S Kustu - Journal of molecular biology, 1993 - Elsevier
The NTRC protein of enteric bacteria is an enhancer-binding protein that activates
transcription by the σ 54-holoenzyme form of RNA polymerase under nitrogen-limiting …

The major dimerization determinants of the nitrogen regulatory protein NTRC from enteric bacteria lie in its carboxy-terminal domain

KE Klose, AK North, KM Stedman, S Kustu - Journal of molecular biology, 1994 - Elsevier
The NTRC protein (nitrogen regulatory protein C) of enteric bacteria is an enhancer-binding
protein that activates transcription by the σ 54-holoenzyme form of RNA polymerase. NTRC …

The phosphorylated form of the enhancer-binding protein NTRC has an ATPase activity that is essential for activation of transcription

DS Weiss, J Batut, KE Klose, J Keener, S Kustu - Cell, 1991 - cell.com
The NTRC protein of enteric bacteria is an enhancerbinding protein that activates
transcription in response to limitation of combined nitrogen. NTRC activates transcription by …

Protein kinase and phosphoprotein phosphatase activities of nitrogen regulatory proteins NTRB and NTRC of enteric bacteria: roles of the conserved amino-terminal …

J Keener, S Kustu - … of the National Academy of Sciences, 1988 - National Acad Sciences
The NTRC protein (ntrC product) of enteric bacteria activates transcription of nitrogen-
regulated genes by a holoenzyme form of RNA polymerase that contains the ntrA product …

Repressor forms of the enhancer-binding protein NtrC: some fail in coupling ATP hydrolysis to open complex formation by σ54-holoenzyme

AK North, DS Weiss, H Suzuki, Y Flashner… - Journal of molecular …, 1996 - Elsevier
NtrC (nitrogen regulatory protein C) is a bacterial enhancer-binding protein that activates
transcription by catalyzing isomerization of closed complexes between σ54-holoenzyme and …

Constitutive forms of the enhancer-binding protein NtrC: evidence that essential oligomerization determinants lie in the central activation domain

Y Flashner, DS Weiss, J Keener, S Kustu - Journal of molecular biology, 1995 - Elsevier
Nitrogen regulatory protein C (NtrC) is a bacterial enhancer-binding protein that activates
transcription by the σ54-holoenzyme. To activate transcription, NtrC must hydrolyze ATP, a …

Mechanism of transcriptional activation by NtrC

SC Porter, AK North, S Kustu - Two‐Component Signal …, 1995 - Wiley Online Library
In the case of nitrogen regulatory protein C (NtrC), both nucleotide hydrolysis and
transcriptional activation depend on phosphorylation of an aspartate residue in the N …

Phosphorylation site of NtrC, a protein phosphatase whose covalent intermediate activates transcription

DA Sanders, BL Gillece-Castro… - Journal of …, 1992 - Am Soc Microbiol
The NtrC transcription factor is a member of a family of homologous prokaryotic regulatory
proteins that participate in the transduction of extracellular and nutritional signals. It has …

MgATP binding and hydrolysis determinants of NtrC, a bacterial enhancer-binding protein

I Rombel, P Peters-Wendisch, A Mesecar… - Journal of …, 1999 - Am Soc Microbiol
When phosphorylated, the dimeric form of nitrogen regulatory protein C (NtrC) of Salmonella
typhimurium forms a larger oligomer (s) that can hydrolyze ATP and hence activate …

Influence of a mutation in the putative nucleotide binding site of the nitrogen regulatory protein NTRC on its positive control function

S Austin, C Kundrot, R Dixon - Nucleic acids research, 1991 - academic.oup.com
A mutation, serine 170 to alanine, in the proposed ATP binding site of the activator protein
NTRC prevents transcriptional activation at σ 54-dependent promoters both in vivo and in …