Escherichia is a rod-shaped genus of bacteria from the family Enterobacteriaceae. This genus of bacteria is Gram-negative, does not form spores, and is facultatively anaerobic, which means that this bacteria makes adenosine triphosphate (ATP) by aerobic respiration if oxygen is present in the environment, but can also switch to fermentation. Escherichia is commonly founding the gastrointestinal tracts of warm-blooded animals, and these species of bacteria typically provide a portion of vitamin K (microbially derived) to their host. A good number of Escherichia species are pathogenic, which means that it can cause disease to its host. The genus Escherichia is named after Theodor Escherich, a German-Austriant pediatrician and professor who discovered the Escherichia coli or E. coli.
There are many enzymes found in the Escherichia genus, including the pyruvate formate lyase (PFL), which helps regulate anaerobic glucose metabolism—a process that is important in a facultatively anaerobic organism. Pyruvate formate lyase uses radical non-redox chemistry in order to catalyze the reversible conversion of pyruvate and coenzyme-A (CoA) into acetyl coenzyme-A and formate. Restriction endonuclease is an enzyme involved with restriction modification system and naturally found in Escherichia coli. This enzyme contains 402 amino acids, which gve the substance a molecular mass of 45.2 kDa.
Fumarate hydratase is an enzyme that catalyzes the reversible hydration of fumarate to L-malate, and this enzyme is typically found in Escherichia coli fumC, because of its thermolabile dimeric nature. The glycoside hydrolase family 2 is a group of enzymes have a conserved glutamic acid residue, which is often found in Escherichia coli lacZ. These enzymes hydrolyse the glycosidic bond between two or more carbohydrate molecules, as well as between a carbohydrate molecule and a non-carbohydrate molecule.
This category contains scientific information on Escherichia, a genus of bacteria that contains a wide variety of enzymes.
Rhodes Roberts M.E., 1980: Physiological properties of nitrogen scavenging bacteria from the marine environment. Journal Of Applied Bacteriology: 421-434 Nine selected strains of marine bacteria from the marine environment were taxonomically heterogeneous in character and exhibited a capacity for prolonged growth on N-free media; only 1 strain, a Klebsiella sp., fixed dinitrogen under any of [...]
Feucht B.U., 1982: Physiological de sensitization of carbohydrate permeases and adenylate cyclase to regulation by the phosphoenol pyruvate sugar phospho transferase system in escherichia coli and salmonella typhimurium involvement of cyclic amp and inducer. Journal Of Biological Chemistry: 2509-2517 In E. coli and S. typhimurium, adenylate cyclase and a number of carbohydrate transport systems are [...]
Borucka Mankiewicz M., 1979: Physiological characterization of polar tn 5 induced iso leucine valine auxotrophs in escherichia coli k 12 evidence for an internal promoter in the ilvogeda operon. Genetics: 309-320 The properties of 22 isoleucine-valine auxotrophs induced in E. coli K-12 by the transposable element, Tn5, were characterized on the basis of growth requirements, [...]
Alberghina L., 1988: Physiological and genetic modulation of inducible expression of escherichia coli beta galactosidase in saccharomyces cerevisiae. Applied Microbiology & Biotechnology: 160-165 Saccharomyces cerevisiae cells transformed with plasmids bearing the lacZ gene from Escherichia coli, under the control of the inducible Gal1-10/Cyc1 promoter, produce the highest amount of.beta.-galactosidase during a transient physiological condition corresponding [...]
Clark A.J., 1981: Physical mapping of the srl reca region of escherichia coli analysis of transposon tn 10 generated insertions and deletions. Molecular & General Genetics: 497-504 A restriction endonuclease map for the enzymes EcoRI, BamHI, SalI and PstI covering 23.5 kilobase pairs (kb) of the srl recA region of E. coli was constructed. An [...]
Kalmokoff J., 1987: Physical mapping of the dna genome of insect iridescent virus type 9 from wiseana spp larvae. Virology: 507-510 A physical map for the Dna genome of insect iridescent virus type 9 isolated from Wiseana spp. larvae was constructed using the restriction enzymes BamHI, EcoRI, and Pstl. Viral Dna was cloned into the [...]
Groman N.B., 1981: Physical mapping of beta converting and gamma nonconverting corynebacterio phage genomes. Journal Of Bacteriology: 131-142 Dna from wild-type and mutant strains of.beta.-converting and.gamma.-nonconverting corynebacteriophages (which infect Corynebacterium diphtheriae) were isolated and physically characterized. The data obtained from Dna heteroduplexes, restriction enzyme banding profiles and restriction maps reinforce the conclusion that.beta. and.gamma. phages [...]
Umbarger H.E., 1980: Physical location of the ilvo determinant in escherichia coli k 12 dna. Journal Of Bacteriology: 547-555 A plasmid carrying the 4.6 kilobase (kb) HindIII-derived fragment from an ilvO mutant derivative of.lambda.h80dilv imparted a valine-resistant phenotype on strains it carried. This fragment carries a small amount of the promoter-proximal end of ilvE, the [...]
Clowes R.C., 1980: Physical characterization of plasmids determining synthesis of a microcin which inhibits methionine synthesis in escherichia coli. Journal Of Bacteriology: 1015-1023 Plasmid Dna isolated from each of 3 antibiotic-resistant clinical strains of E. coli producing the same microcin showed multiple bands upon agarose gel electrophoresis. Transformants selected either for microcin resistance or ampicillin [...]
Silverman P.M., 1984: Physical and genetic structure of the glp k cpx a interval of the escherichia coli k 12 chromosome. Molecular & General Genetics: 261-271 Mutations at the cpxA locus of E. coli K-12 affect cellular processes that are not otherwise related. One now determined the physical and genetic structure of the E. coli [...]