PII signal transduction proteins: sensors of alpha-ketoglutarate that regulate nitrogen metabolism. Ninfa, A J & Jiang, P Current Opinion in Microbiology, 8(2):168–173, 2005.
doi  abstract   bibtex   
Pll proteins are small homotrimeric signal transduction proteins that regulate the activities of metabolic enzymes and permeases, and control the activities of signal transduction enzymes. The protein family shows high conservation, with examples in eukaryota (plants and eukaryotic algae), archaea, and bacteria. This distribution indicates that Pll is one of the most ancient signalling proteins known.
@article{ninfa_pii_2005,
	title = {{PII} signal transduction proteins: sensors of alpha-ketoglutarate that regulate nitrogen metabolism},
	volume = {8},
	doi = {DOI 10.1016/j.mib.2005.02.011},
	abstract = {Pll proteins are small homotrimeric signal transduction proteins that regulate the activities of metabolic enzymes and permeases, and control the activities of signal transduction enzymes. The protein family shows high conservation, with examples in eukaryota (plants and eukaryotic algae), archaea, and bacteria. This distribution indicates that Pll is one of the most ancient signalling proteins known.},
	language = {English},
	number = {2},
	journal = {Current Opinion in Microbiology},
	author = {Ninfa, A J and Jiang, P},
	year = {2005},
	keywords = {coli nrii ntrb, complex-formation, enteric bacteria, escherichia-coli, glnk, l-glutamate kinase, p-ii protein, phosphatase-activity, physiological-role, yeast 2-hybrid},
	pages = {168--173},
}

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