title: Cloning and sequencing of two genes encoding chitinases A and B from Bacillus cereus CH.
abstract: Two genes encoding chitinases A and B (chiA and chiB) from Bacillus cereus CH were cloned into Escherichia coli XL1-Blue MRF', by using pBluescript II SK+, and their nucleotide sequences were determined. Open reading frames of the chiA and chiB genes encoded distinct polypeptide chains consisting of 360 and 674 amino acid residues, respectively, with calculated molecular sizes of 39,470 and 74,261 Da, respectively. Comparison of the deduced amino acid sequences with those of other bacterial chitinases revealed that chitinase A consisted of a catalytic domain, while chitinase B consisted of three functional domains, a catalytic domain, a fibronectin type III-like domain, and a cellulose-binding domain. The primary structures of these two proteins were not similar to each other.
authors.affiliation: Division of Molecular Virology, Institute of Genetic Medicine, Hokkaido University, Sapporo-shi, Japan.
authors.forename: N
authors.initials: N
authors.lastname: Mabuchi
authors.forename: Y
authors.initials: Y
authors.lastname: Araki
mesh_terms: D000595:Amino Acid Sequence; D001409:Bacillus cereus / Q000201:enzymology / Q000235:genetics*; D001426:Bacterial Proteins / Q000096:biosynthesis / Q000737:chemistry / Q000235:genetics; D002688:Chitinases / Q000096:biosynthesis / Q000737:chemistry / Q000235:genetics*; D003001:Cloning, Molecular; D004926:Escherichia coli / Q000235:genetics; D005798:Genes, Bacterial; D008969:Molecular Sequence Data; D008970:Molecular Weight; D010940:Plant Proteins / Q000096:biosynthesis / Q000737:chemistry / Q000235:genetics*; D016415:Sequence Alignment
chemical_list: D001426:Bacterial Proteins; D010940:Plant Proteins; D002688:Chitinases; C094255:PLC-B protein, Phytolacca americana; C094590:chitinase ChiA