Biomaterial Database

Studies of the 2':3'-cyclic nucleotide phosphodiesterase of Haemophilus influenzae. 1985

B M Anderson, and D W Kahn, and C D Anderson

The 2':3'-cyclic nucleotide phosphodiesterase:3'-nucleotidase of Haemophilus influenzae was purified from a periplasmic preparation by affinity chromatographic techniques. The enzyme-catalysed hydrolysis of 2':3'-cyclic AMP to adenosine without accumulation of the intermediate substrate 3'-AMP was demonstrated by high performance liquid chromatography. Competitive inhibition of the enzyme by a variety of nucleosides and mononucleotides indicated the presence of either purine or pyrimidine bases to be essential for selective interactions with the enzyme, and confirmed the need for a 3'-position phosphate for the functioning of mononucleotides as substrates for the enzyme. The enzyme had a molecular weight of 79 000, was stable at low temperatures and was thermally denatured at temperatures above 50 degrees C.

UI	MeSH Term	Description	Entries
D007700	Kinetics	The rate dynamics in chemical or physical systems.
D008970	Molecular Weight	The sum of the weight of all the atoms in a molecule.	Molecular Weights,Weight, Molecular,Weights, Molecular
D011489	Protein Denaturation	Disruption of the non-covalent bonds and/or disulfide bonds responsible for maintaining the three-dimensional shape and activity of the native protein.	Denaturation, Protein,Denaturations, Protein,Protein Denaturations
D002851	Chromatography, High Pressure Liquid	Liquid chromatographic techniques which feature high inlet pressures, high sensitivity, and high speed.	Chromatography, High Performance Liquid,Chromatography, High Speed Liquid,Chromatography, Liquid, High Pressure,HPLC,High Performance Liquid Chromatography,High-Performance Liquid Chromatography,UPLC,Ultra Performance Liquid Chromatography,Chromatography, High-Performance Liquid,High-Performance Liquid Chromatographies,Liquid Chromatography, High-Performance
D004791	Enzyme Inhibitors	Compounds or agents that combine with an enzyme in such a manner as to prevent the normal substrate-enzyme combination and the catalytic reaction.	Enzyme Inhibitor,Inhibitor, Enzyme,Inhibitors, Enzyme
D006193	Haemophilus influenzae	A species of HAEMOPHILUS found on the mucous membranes of humans and a variety of animals. The species is further divided into biotypes I through VIII.	Bacterium influenzae,Coccobacillus pfeifferi,Haemophilus meningitidis,Hemophilus influenzae,Influenza-bacillus,Mycobacterium influenzae
D006358	Hot Temperature	Presence of warmth or heat or a temperature notably higher than an accustomed norm.	Heat,Hot Temperatures,Temperature, Hot,Temperatures, Hot
D001667	Binding, Competitive	The interaction of two or more substrates or ligands with the same binding site. The displacement of one by the other is used in quantitative and selective affinity measurements.	Competitive Binding
D013379	Substrate Specificity	A characteristic feature of enzyme activity in relation to the kind of substrate on which the enzyme or catalytic molecule reacts.	Specificities, Substrate,Specificity, Substrate,Substrate Specificities
D015087	2',3'-Cyclic-Nucleotide Phosphodiesterases	Nucleoside-2',3'-cyclic phosphate nucleotidohydrolase. Enzymes that catalyze the hydrolysis of the 2'- or 3'- phosphate bonds of 2',3'-cyclic nucleotides. Also hydrolyzes nucleoside monophosphates. Includes EC 3.1.4.16 and EC 3.1.4.37. EC 3.1.4.-.	2',3'-Cyclic Nucleotide Phosphodiesterase,2',3'-Cyclic Nucleotide Phosphodiesterases,2,3-Cyclic Nucleotide Phosphodiesterase,2,3-Cyclic Nucleotide Phosphodiesterases,CNPase,2',3' Cyclic Nucleotide Phosphodiesterase,2',3' Cyclic Nucleotide Phosphodiesterases,2,3 Cyclic Nucleotide Phosphodiesterase,2,3 Cyclic Nucleotide Phosphodiesterases,Nucleotide Phosphodiesterase, 2',3'-Cyclic,Nucleotide Phosphodiesterase, 2,3-Cyclic,Nucleotide Phosphodiesterases, 2',3'-Cyclic,Nucleotide Phosphodiesterases, 2,3-Cyclic,Phosphodiesterase, 2',3'-Cyclic Nucleotide,Phosphodiesterase, 2,3-Cyclic Nucleotide,Phosphodiesterases, 2',3'-Cyclic Nucleotide,Phosphodiesterases, 2',3'-Cyclic-Nucleotide,Phosphodiesterases, 2,3-Cyclic Nucleotide