title: Physicochemical properties of a lipase from Pseudomonas fluorescens.
abstract: The molecular weight of traicylglycerol lipase (EC 3.1.1.3) from Pseudomonas fluorescens is estimated to be approx. 33 000 by sodium dodecyl sulfate electrophoresis and Sephadex G-75 gel filtration. The lipase appears to be a single-chain protein and contains neither sugar nor lipid. The enzyme has a sedimentation coefficient (S20,w) of 3.06, an intrinsic viscosity of 3.0 g/ml and a partial specific volume of 0.730 g/ml, with an isoelectric point of pH 4.46. Amino acid analysis showed that the enzyme contained few sulfur-containing amino acid residues with no disulfide links. The N-terminal residue of the enzyme was found to be alanine and optical rotation dispersion analysis showed that about 20% of the enzyme structure was in a helicla configuration.
mesh_terms: D000596:Amino Acids / Q000032:analysis; D008049:Lipase; D008970:Molecular Weight; D009905:Optical Rotatory Dispersion; D011487:Protein Conformation; D011551:Pseudomonas fluorescens / Q000201:enzymology*; D014280:Triglycerides; D014783:Viscosity
chemical_list: D000596:Amino Acids; D014280:Triglycerides; D008049:Lipase