title: Molecular and biochemical analysis of rainbow trout LCK suggests a conserved mechanism for T-cell signaling in gnathostomes.
abstract: Two genes were identified in rainbow trout that display high sequence identity to vertebrate Lck. Both of the trout Lck transcripts are associated with lymphoid tissues and were found to be highly expressed in IgM-negative lymphocytes. In vitro analysis of trout lymphocytes indicates that trout Lck mRNA is up-regulated by T-cell mitogens, supporting an evolutionarily conserved function for Lck in the signaling pathways of T-lymphocytes. Here, we describe the generation and characterization of a specific monoclonal antibody raised against the N-terminal domains of recombinant trout Lck that can recognize Lck protein(s) from trout thymocyte lysates that are similar in size ( approximately 57kDa) to mammalian Lck. This antibody also reacted with permeabilized lymphocytes during FACS analysis, indicating its potential usage for cellular analyses of trout lymphocytes, thus representing an important tool for investigations of salmonid T-cell function.
authors.affiliation: Department of Pathobiology, University of Washington, Seattle, WA 98195, USA.
authors.forename: Kerry J
authors.initials: KJ
authors.lastname: Laing
authors.forename: Stacey
authors.initials: S
authors.lastname: Dutton
authors.forename: John D
authors.initials: JD
authors.lastname: Hansen
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D000911:Antibodies, Monoclonal / Q000096:biosynthesis / Q000276:immunology; D019860:Lymphocyte Specific Protein Tyrosine Kinase p56(lck) / Q000032:analysis* / Q000235:genetics / Q000378:metabolism; D008969:Molecular Sequence Data; D017686:Oncorhynchus mykiss / Q000235:genetics / Q000276:immunology*; D010802:Phylogeny; D011994:Recombinant Proteins / Q000235:genetics / Q000276:immunology; D015398:Signal Transduction; D013601:T-Lymphocytes / Q000201:enzymology* / Q000276:immunology; D014018:Tissue Distribution
chemical_list: D000911:Antibodies, Monoclonal; D011994:Recombinant Proteins; D019860:Lymphocyte Specific Protein Tyrosine Kinase p56(lck)