title: Cloning and sequencing of cDNA encoding bovine tumor necrosis factor (TNF)-receptor I.
abstract: Tumor necrosis factor (TNF) is a multipotent cytokine produced by activated macrophages and lymphocytes and its activity is mediated by specific cell surface receptors, TNF-RI and TNF-RII. We have isolated and analyzed a cDNA encoding bovine TNF-RI gene and compared it with known TNF-RI sequences from other species. The cDNA sequence for the coding region of bovine TNF-RI shows 80% homology with porcine TNF-RI and 77% with human TNF-RI. The cDNA sequence of bovine TNF-RI codes for 471 amino acids and shows 75% and 67% identity with the amino acid sequences of porcine TNF-RI and human TNF-RI, respectively. The predicted bovine TNF-RI amino acid sequence consists of a signal peptide, an extracellular domain, a transmembrane region and a cytoplasmic tail. The extracellular region contains four repeated cysteine rich domains, which are conserved in all species. Northern blot results show that bovine TNF-RI gene is expressed in neutrophils and mononuclear leukocytes.
authors.affiliation: Department of Veterinary Physiology and Pharmacology, Iowa State University, Ames 50010, USA. mkehrli@nadc.ars.usda.gov
authors.forename: E K
authors.initials: EK
authors.lastname: Lee
authors.forename: M E
authors.initials: ME
authors.lastname: Kehrli
authors.forename: M J
authors.initials: MJ
authors.lastname: Taylor
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D015703:Antigens, CD / Q000737:chemistry / Q000235:genetics*; D001483:Base Sequence; D002417:Cattle / Q000235:genetics* / Q000276:immunology*; D003001:Cloning, Molecular; D017124:Conserved Sequence; D018076:DNA, Complementary / Q000235:genetics*; D015870:Gene Expression; D006801:Humans; D008969:Molecular Sequence Data; D012333:RNA, Messenger / Q000235:genetics / Q000378:metabolism; D018124:Receptors, Tumor Necrosis Factor / Q000737:chemistry / Q000235:genetics*; D047888:Receptors, Tumor Necrosis Factor, Type I; D012091:Repetitive Sequences, Nucleic Acid; D013045:Species Specificity; D013552:Swine; D014018:Tissue Distribution
chemical_list: D015703:Antigens, CD; D018076:DNA, Complementary; D012333:RNA, Messenger; D018124:Receptors, Tumor Necrosis Factor; D047888:Receptors, Tumor Necrosis Factor, Type I