title: 5'-nucleotidase from bull seminal plasma, chicken gizzard and snake venom is a zinc metalloprotein.
abstract: Using flame atomic absorption spectrometry the tight association of zinc to three different purified 5'-nucleotidases at a molar ratio of 2 could be proven. These 5'-nucleotidases purified from bull seminal plasma (BSP), chicken gizzard (CG) and snake venom (SV) are thus zinc metalloproteins. Removal of zinc results in the loss of their AMPase activity, which could be fully restored after readdition of zinc at a molar ratio of 2, for BSP and CG, and 1.5, for SV 5'-nucleotidase. Reactivation of their AMPase activity after the removal of zinc could also be obtained by addition of cobalt and copper ions, which were found to also bind with a molar ratio of 2 to the three 5'-nucleotidases tested.
authors.affiliation: Dipartimento di Medicina Sperimentale e Scienze Biochimiche, Università di Perugia, Italy.
authors.forename: C
authors.initials: C
authors.lastname: Fini
authors.forename: C A
authors.initials: CA
authors.lastname: Palmerini
authors.forename: P
authors.initials: P
authors.lastname: Damiani
authors.forename: U
authors.initials: U
authors.lastname: Stochaj
authors.forename: H G
authors.initials: HG
authors.lastname: Mannherz
authors.forename: A
authors.initials: A
authors.lastname: Floridi
mesh_terms: D015720:5'-Nucleotidase / Q000378:metabolism; D000818:Animals; D001051:Apoenzymes; D002417:Cattle; D002645:Chickens; D003035:Cobalt / Q000494:pharmacology; D003300:Copper / Q000494:pharmacology; D005895:Gizzard, Avian / Q000201:enzymology; D008667:Metalloproteins; D009571:Nitrilotriacetic Acid / Q000494:pharmacology; D009708:Nucleotidases / Q000378:metabolism; D012661:Semen / Q000201:enzymology; D012910:Snake Venoms / Q000032:analysis; D012911:Snakes; D015032:Zinc / Q000378:metabolism*
chemical_list: D001051:Apoenzymes; D008667:Metalloproteins; D012910:Snake Venoms; D003035:Cobalt; D003300:Copper; D009708:Nucleotidases; C018775:adenosine monophosphatase; D015720:5'-Nucleotidase; D015032:Zinc; D009571:Nitrilotriacetic Acid