Detailed Information on Publication Record
2014
Fructose 1-Phosphate is the One and Only Physiological Effector of the Cra (FruR) regulator of Pseudomonas putida.
CHAVARRIA, M., G. DURANTE-RODRIGUEZ, T. KRELL, C. SANTIAGO, Jan BREZOVSKÝ et. al.Basic information
Original name
Fructose 1-Phosphate is the One and Only Physiological Effector of the Cra (FruR) regulator of Pseudomonas putida.
Authors
CHAVARRIA, M. (724 Spain), G. DURANTE-RODRIGUEZ (724 Spain), T. KRELL (724 Spain), C. SANTIAGO (724 Spain), Jan BREZOVSKÝ (203 Czech Republic, belonging to the institution), Jiří DAMBORSKÝ (203 Czech Republic, guarantor, belonging to the institution) and V. DE LORENZO (724 Spain)
Edition
FEBS Open Bio, 2014, 2211-5463
Other information
Language
English
Type of outcome
Článek v odborném periodiku
Field of Study
10600 1.6 Biological sciences
Country of publisher
United Kingdom of Great Britain and Northern Ireland
Confidentiality degree
není předmětem státního či obchodního tajemství
Impact factor
Impact factor: 1.515
RIV identification code
RIV/00216224:14310/14:00074207
Organization unit
Faculty of Science
UT WoS
000346278200048
Keywords in English
Cra; FruR; Pseudomonas putida; Fructose 1-phosphate; Fructose operon
Změněno: 21/1/2015 15:36, Ing. Andrea Mikešková
Abstract
V originále
Fructose-1-phosphate (F1P) is the preferred effector of the catabolite repressor/activator (Cra) protein of the soil bacterium Pseudomonas putida but its ability to bind other metabolic intermediates in vivo is unclear. The Cra protein of this microorganism (CraPP) was submitted to mobility shift assays with target DNA sequences (the PfruB promoter) and candidate effectors fructose-1,6-biphosphate (FBP), glucose 6-phosphate (G6P), and fructose-6-phosphate (F6P). 1mM F1P was sufficient to release most of the Cra protein from its operators but more than 10mM of FBP or G6P was required to free the same complex. However, isothermal titration microcalorimetry failed to expose any specific interaction between CraPP and FBP or G6P. To solve this paradox, transcriptional activity of a PfruB-lacZ fusion was measured in wild-type and fruB cells growing on substrates that change the intracellular concentrations of F1P and FBP. The data indicated that PfruB activity was stimulated by fructose but not by glucose or succinate. This suggested that CraPP represses expression in vivo of the cognate fruBKA operon in a fashion dependent just on F1P, ruling out any other physiological effector. Molecular docking and dynamic simulations of the Cra-agonist interaction indicated that both metabolites can bind the repressor, but the breach in the relative affinity of CraPP for F1P vs FBP is three orders of magnitude larger than the equivalent distance in the Escherichia coli protein. This assigns the Cra protein of P. putida the sole role of transducing the presence of fructose in the medium into a variety of direct and indirect physiological responses.
Links
ED0001/01/01, research and development project |
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EE2.3.30.0037, research and development project |
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GAP503/12/0572, research and development project |
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