title: [Phosphatases and phosphodiesterases isolated from the red king crab (Paralithodes camtschatica) hepatopancreas].
abstract: Five enzymes have been isolated from the hepatopancreas of the red king crab Paralithodes camtschatica by means of ion exchange and gel chromatography: two acid (AcP) and one alkaline (AlkP) phosphmonoesterases, one alkaline phosphodiesterase (AlkPD), and one acid phosphodiesterase (AcPD). The pH optimum values of these enzymes are: AlkPs and AlkPD, 7.5; AcP, 5.5; and AcPD, 5.0. The activity of AlkP and AlkPD demands Mg2+ ions. The molecular weights of the enzymes (kDa) are the following: AlkP, 80: AcPs, 80 and 82; AlkPD, 51; and AcPD, 57. The enzymes are relatively thermostable (ID50 from 47 to 62 degrees C). AlkP is inhibited by NaCl (IC50 at 0.4 M). The AcP, AcPD, and AlkPD activities are tolerant of high ionic strength.
authors.forename: N I
authors.initials: NI
authors.lastname: Menzorova
authors.forename: A D
authors.initials: AD
authors.lastname: Ivleva
authors.forename: Iu T
authors.initials: IuT
authors.lastname: Sibirtsev
authors.forename: V A
authors.initials: VA
authors.lastname: Rasskazov
mesh_terms: D000818:Animals; D033381:Anomura / Q000201:enzymology*; D002850:Chromatography, Gel; D043143:Hepatopancreas / Q000201:enzymology*; D007474:Ion Exchange; D008970:Molecular Weight; D010727:Phosphoric Diester Hydrolases / Q000737:chemistry / Q000302:isolation & purification* / Q000378:metabolism; D010744:Phosphoric Monoester Hydrolases / Q000737:chemistry / Q000302:isolation & purification* / Q000378:metabolism
chemical_list: D010744:Phosphoric Monoester Hydrolases; D010727:Phosphoric Diester Hydrolases