title: Characterization and expression profile of complete functional domain of granulysin/NK-lysin homologue (buffalo-lysin) gene of water buffalo (Bubalus bubalis).
abstract: Granulysin (GNLY)/NK-lysin (NKL) is an effector antimicrobial cationic peptide expressed in the cytotoxic and natural killer lymphocytes. We report here cDNA sequence (405bp) encoding the complete functional domain of buffalo-lysin (bu-lysin), and its expression profile in the various tissues. The nucleotide sequence of bu-lysin exhibited >85% identity with the bovine lysin. Comparison of the deduced amino acid sequence of bu-lysin with those of GNLY/NKL of different species revealed the conservation of six cysteine (Cys) residues and five alpha helices. Unlike the homologues in other species, bu-lysin composed of 11 positively charged Lys residues as in equine. The expression of bu-lysin mRNA in the in vitro cultured lymphocytes was inducible and increased markedly (p<0.05) in a dose dependant manner when incubated with Concanavalin A (ConA). The expression of bu-lysin mRNA in the different tissues was variable: comparatively higher in the spleen and lymph node, moderate in the uterine endometrium and low in the liver and kidney. These results indicate the existence and active expression of GNLY/NKL homologue in water buffalo having a significant influence in immune response.
authors.affiliation: Genome Analysis Laboratory, Animal Genetics Division, Indian Veterinary Research Institute, Izatnagar, India.
authors.forename: Sukumar
authors.initials: S
authors.lastname: Kandasamy
authors.forename: Abhijit
authors.initials: A
authors.lastname: Mitra
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D000945:Antigens, Differentiation, T-Lymphocyte / Q000096:biosynthesis* / Q000235:genetics / Q000276:immunology; D001483:Base Sequence; D002020:Buffaloes / Q000235:genetics / Q000276:immunology*; D003001:Cloning, Molecular; D008969:Molecular Sequence Data; D010802:Phylogeny; D012333:RNA, Messenger / Q000096:biosynthesis / Q000235:genetics; D020133:Reverse Transcriptase Polymerase Chain Reaction / Q000662:veterinary; D016415:Sequence Alignment
chemical_list: D000945:Antigens, Differentiation, T-Lymphocyte; D012333:RNA, Messenger