title: Purification, partial characterization, and cloning of nitric oxide-carrying heme proteins (nitrophorins) from salivary glands of the blood-sucking insect Rhodnius prolixus.
abstract: Four nitric oxide (NO)-carrying proteins have been isolated from salivary glands of the blood-sucking insect Rhodnius prolixus. These have been given the collective name "nitrophorins," and individual proteins are designated NP1-NP4 in order of their relative abundance in the glands. All four reversibly bind NO; spectral shifts associated with NO binding indicate the interaction of NO with an Fe(III) heme. Physical properties, amino acid composition, and amino-terminal sequences of the nitrophorins are reported. The most abundant nitrophorin was cloned, and its sequence was determined.
authors.affiliation: Department of Entomology, University of Arizona, Tucson 85721, USA.
authors.forename: D E
authors.initials: DE
authors.lastname: Champagne
authors.forename: R H
authors.initials: RH
authors.lastname: Nussenzveig
authors.forename: J M
authors.initials: JM
authors.lastname: Ribeiro
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D001483:Base Sequence; D002852:Chromatography, Ion Exchange; D003001:Cloning, Molecular; D018076:DNA, Complementary; D004578:Electron Spin Resonance Spectroscopy; D006420:Hemeproteins / Q000235:genetics* / Q000302:isolation & purification / Q000378:metabolism; D008969:Molecular Sequence Data; D009569:Nitric Oxide / Q000378:metabolism*; D011485:Protein Binding; D012239:Rhodnius / Q000235:genetics / Q000378:metabolism*; D012469:Salivary Glands / Q000378:metabolism*; D012471:Salivary Proteins and Peptides / Q000235:genetics* / Q000302:isolation & purification / Q000378:metabolism; D017386:Sequence Homology, Amino Acid
chemical_list: D018076:DNA, Complementary; D006420:Hemeproteins; D012471:Salivary Proteins and Peptides; C090560:nitrophorin; D009569:Nitric Oxide