title: Threonine deaminase from a mutant requiring isoleucine or pyridoxine: inability to form a tetrameric state.
abstract: Threonine deaminase from a mutant of Escherichia coli growing alternatively with isoleucine or pyridoxine is a dimer, whereas the wild-type enzyme is a tetramer.
mesh_terms: D011232:Chemical Precipitation; D002845:Chromatography; D002852:Chromatography, Ion Exchange; D004591:Electrophoresis, Polyacrylamide Gel; D004926:Escherichia coli / Q000201:enzymology* / Q000378:metabolism; D005796:Genes; D006836:Hydro-Lyases / Q000032:analysis / Q000302:isolation & purification / Q000378:metabolism*; D007532:Isoleucine / Q000378:metabolism*; D008970:Molecular Weight; D009154:Mutation; D011732:Pyridoxal Phosphate / Q000494:pharmacology; D011736:Pyridoxine / Q000378:metabolism*; D013912:Threonine; D014461:Ultracentrifugation
chemical_list: D007532:Isoleucine; D013912:Threonine; D011732:Pyridoxal Phosphate; D006836:Hydro-Lyases; D011736:Pyridoxine