title: BAY 41-2272 activates two isoforms of nitric oxide-sensitive guanylyl cyclase.
abstract: Soluble guanylyl cyclase is an important target for endogenous nitric oxide and the guanylyl cyclase modulator, YC-1. Recently BAY 41-2272 was identified as a similar but more potent and more specific substance. While YC-1 also acts as non-specific phosphodiesterase inhibitor, BAY 41-2272 is devoid of an effect on phosphodiesterases. BAY 41-2272 has so far only been tested on the alpha(1)/beta(1) heterodimeric isoform of soluble guanylyl cyclase and its binding site has been mapped to a region in the alpha(1) subunit amino-terminal sequence. Although this region is poorly conserved in the alpha(2) subunit, we show in the current study that the alpha(2)/beta(1) heterodimeric enzyme isoform is activated by BAY 41-2272. Deletion analysis of the alpha(2) subunit and co-expression with the beta(1) subunit in the baculovirus/Sf9 system is consistent with the amino-terminal amino acids 104 to 401 of the alpha(2) subunit as binding site for BAY 41-2272.
authors.affiliation: Institut für Experimentelle und Klinische Pharmakologie, Universität Hamburg, Martinistrasse 52, Hamburg, D-20246, Germany.
authors.forename: Markus
authors.initials: M
authors.lastname: Koglin
authors.forename: Johannes-Peter
authors.initials: JP
authors.lastname: Stasch
authors.forename: Sönke
authors.initials: S
authors.lastname: Behrends
mesh_terms: D000818:Animals; D001665:Binding Sites / Q000502:physiology; D002460:Cell Line; D004305:Dose-Response Relationship, Drug; D004789:Enzyme Activation / Q000187:drug effects; D020536:Enzyme Activators / Q000494:pharmacology; D006162:Guanylate Cyclase; D006801:Humans; D006834:Hydrazines / Q000494:pharmacology; D007191:Indazoles / Q000494:pharmacology; D007527:Isoenzymes / Q000187:drug effects / Q000235:genetics / Q000378:metabolism; D016297:Mutagenesis, Site-Directed; D009569:Nitric Oxide / Q000494:pharmacology*; D020030:Nitric Oxide Donors / Q000494:pharmacology; D009589:Nitrogen Oxides; D021122:Protein Subunits; D011720:Pyrazoles / Q000494:pharmacology*; D011725:Pyridines / Q000494:pharmacology*; D051381:Rats; D018160:Receptors, Cytoplasmic and Nuclear / Q000187:drug effects* / Q000235:genetics / Q000378:metabolism*; D000071756:Soluble Guanylyl Cyclase; D018411:Spodoptera
chemical_list: C423582:3-(4-Amino-5-cyclopropylpyrimidine-2-yl)-1-(2-fluorobenzyl)-1H-pyrazolo(3,4-b)pyridine; D020536:Enzyme Activators; C000605660:GUCY1A2 protein, human; C000605667:Gucy1a2 protein, rat; D006834:Hydrazines; D007191:Indazoles; D007527:Isoenzymes; D020030:Nitric Oxide Donors; D009589:Nitrogen Oxides; D021122:Protein Subunits; D011720:Pyrazoles; D011725:Pyridines; D018160:Receptors, Cytoplasmic and Nuclear; C090937:3-(5'-hydroxymethyl-2'-furyl)-1-benzylindazole; D009569:Nitric Oxide; C084012:1,1-diethyl-2-hydroxy-2-nitrosohydrazine; D006162:Guanylate Cyclase; D000071756:Soluble Guanylyl Cyclase