The Complete Amino Acid Sequence of Chitinase-a from the Seeds of Rye (Secale cereal)

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• The complete amino acid sequence of rye seed chitinase-a (RSC-a) has been analyzed. RSC-a was cleaved with cyanogen bromide and the resulting three fragments, CB1, CB2, and CB3, were separated by gel filtration. The amino acids of the N-terminal fragment CB1 were sequenced by analyzing the peptides produced by digestion with trypsin, lysylendopeptidase, or pepsin of reduced S-carboxymethylated or S-aminoethylated CB1. The sequences of fragments CB2 and CB3 were established by sequencing the tryptic peptides from reduced S-carboxymethylated CB2 and CB3, and by aligning them with the sequence of rye seed chitinase-c (RSC-c) to maximize sequence homology. The complete amino acid sequence of RSC-a was established by connecting these three fragments. RSC-a consists of 302 amino acid residues including hydroxyproline residues, and has a molecular mass of 31, 722 Da. RSC-a is basic protein with a cysteine-rich amino terminal domain, indicating that this enzyme belongs to class I chitinases. The amino acid sequence of RSC-a showed that the sequence from Gly60 to C-terminal Ala302 in this enzyme corresponds to that of RSC-c belonging to class II chitinases with 92% identity, and that RSC-a has high similarity to other plant class I chitinases but a longer hinge region and an extra disulfide bond.

• 社団法人日本農芸化学会の論文
• 1994-02-23

著者

• Funatsu Gunki

  Laboratory Of Biochemistry And ** Laboratory Of Protein Chemistry & Engineering Faculty Of Agric

• YAMAGAMI Takeshi

  Laboratories of Protein Chemistry and Engineering

• Funatsu Gunki

  Laboratory Of Protein Chemistry & Engineering Faculty Of Agriculture Kyushu University

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