title: Molecular characterization of cDNA encoding B. taurus cathelicidin-7 like antibiotic peptide from bone marrow cells of Bubalus bubalis.
abstract: Cathelicidins represent a diverse family of endogenous cationic antibiotic peptide present in all mammalian species. In the present study, a novel cathelicidin cDNA was identified and characterized from bone marrow cells of buffalo (Bubalus bubalis) using RT-PCR based approach. The cDNA encodes a propeptide of 1.18 kDa with net positive charge at neutral pH. The precursor peptide possesses a signal peptide of 29 amino acids and a biologically active peptide of 34 residues. Comparison of sequences indicates only 66.1 and 64.1% identity at nucleotides and amino acids level respectively, with the already reported cathelicidin congener from the same species. However, high degree of similarity (92.8% nucleotides and 81.9% amino acids) was noticed with cathelicidin 7 sequence of Bos taurus suggesting interspecies conservation of cathelicidin peptides rather than intra-species within bovidae family. Phylogenetic trees analyses also support these data. Our findings, further justify the cloned cDNA as a unique cathelicidin member of B. bubalis, and may reasonably considered to be another example of structural diversity exhibited by cathelicidin-derived peptides as reported from other mammals.
authors.affiliation: Indian Veterinary Research Institute, Izatnagar, Uttar Pradesh, India. hemenvet@rediffmail.com
authors.forename: Hemen
authors.initials: H
authors.lastname: Das
authors.forename: Shahaj Uddin
authors.initials: SU
authors.lastname: Ahmed
authors.forename: Tukaram
authors.initials: T
authors.lastname: More
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D001483:Base Sequence; D001854:Bone Marrow Cells / Q000737:chemistry / Q000378:metabolism*; D002020:Buffaloes / Q000145:classification / Q000235:genetics*; D054804:Cathelicidins / Q000737:chemistry / Q000235:genetics*; D002417:Cattle; D018076:DNA, Complementary / Q000235:genetics*; D008969:Molecular Sequence Data; D010802:Phylogeny; D017386:Sequence Homology, Amino Acid; D012689:Sequence Homology, Nucleic Acid
chemical_list: D054804:Cathelicidins; D018076:DNA, Complementary