title: Cloning and nucleotide sequence of a novel cry gene from Bacillus thuringiensis.
abstract: A cry1Ab-type gene was cloned from a new isolate of Bacillus thuringiensis by PCR. When restriction pattern was compared with that of known genes it was found to have additional restriction site for ClaI. Nucleotide sequencing and homology search revealed that the toxin shared 95% homology with the known Cry1Ab proteins as compared to more than 98% homology among the other reported Cry1Ab toxins. The gene encoded a sequence of 1,177 amino acids compared to 1,155 amino acids encoded by all the other 16 cry1Ab genes reported so far. An additional stretch of 22 amino acids after the amino acid G793 in the new toxin sequence showed 100% homology with several other cry genes within cry1 family. Homology search indicated that the new cry1Ab-type gene might have resulted by nucleotide rearrangement between cry1Ab and cry1Aa/cry1Ac genes.
authors.affiliation: National Research Center for Plant Biotechnology, Indian Agricultural Research Institute, New Delhi-110 012, India.
authors.forename: T
authors.initials: T
authors.lastname: Stobdan
authors.forename: S
authors.initials: S
authors.lastname: Kaur
authors.forename: A
authors.initials: A
authors.lastname: Singh
mesh_terms: D001413:Bacillus thuringiensis / Q000235:genetics*; D000083722:Bacillus thuringiensis Toxins; D001426:Bacterial Proteins / Q000096:biosynthesis / Q000235:genetics*; D001427:Bacterial Toxins / Q000096:biosynthesis / Q000235:genetics*; D001483:Base Sequence; D003001:Cloning, Molecular; D004247:DNA / Q000378:metabolism; D015252:Deoxyribonucleases, Type II Site-Specific / Q000494:pharmacology; D004731:Endotoxins / Q000096:biosynthesis / Q000235:genetics*; D006460:Hemolysin Proteins; D008969:Molecular Sequence Data; D009693:Nucleic Acid Hybridization; D016366:Open Reading Frames; D016133:Polymerase Chain Reaction; D012150:Polymorphism, Restriction Fragment Length; D015202:Protein Engineering; D017434:Protein Structure, Tertiary
chemical_list: D000083722:Bacillus thuringiensis Toxins; D001426:Bacterial Proteins; D001427:Bacterial Toxins; D004731:Endotoxins; D006460:Hemolysin Proteins; C030956:insecticidal crystal protein, Bacillus Thuringiensis; D004247:DNA; C032824:ATCGAT-specific type II deoxyribonucleases; D015252:Deoxyribonucleases, Type II Site-Specific