Purification and Characterization of Two Chitinases from the Leaves of Pokeweed(Phytolacca americana)

Moriya Ohta, Takeshi Yamagami, Gunki Funatsu

Research output: Contribution to journalArticle

25 Citations (Scopus)

Abstract

Two chitinases, designated PLC-A and PLC-B, were purified from the leaves of pokeweed (Phytolacca americana) using DEAE-cellulose column chromatography followed by gel filtration on Sephadex G-75, hydrophobic column chromatography, and ion-exchange FPLC. PLC-A and PLC-B are acidic and basic proteins having molecular masses of 25 and 29kDa, and isoelectric points of 3.7 and 9.5, respectively. On the basis of their partial amino acid sequences, it was seen that PLC-A and PLC-B belong to class II and class III chitinases, respectively. The optimal pH of PLC-A toward glycolchitin is pH 4.5 and hydrolyzed (GlcNAc)4 into 2(GlcNAc)2, and (GlcNAc)5-6 into (GlcNAc)2 and (GlcNAc)3. On the other hand, PLC-B has two optimal pHs at 3 and 7 toward glycolchitin and hydrolyzed (GlcNAc)5 into GlcNAc and (GlcNAc)4, and (GlcNAc)6 into GlcNAc, (GlcNAc)2, and (GlcNAc)4.

Original languageEnglish
Pages (from-to)656-661
Number of pages6
JournalBioscience, biotechnology, and biochemistry
Volume59
Issue number4
DOIs
Publication statusPublished - Jan 1 1995

Fingerprint

Phytolacca americana
Chitinases
Programmable logic controllers
Purification
DEAE-Cellulose Chromatography
Ion Exchange Chromatography
Isoelectric Point
Column chromatography
Gel Chromatography
Amino Acid Sequence
Hydrophobic chromatography
DEAE-Cellulose
N,N-diacetylchitobiose
Molecular mass
Proteins
Ion exchange
glycolchitin
Gels
Amino Acids

All Science Journal Classification (ASJC) codes

  • Biotechnology
  • Analytical Chemistry
  • Biochemistry
  • Applied Microbiology and Biotechnology
  • Molecular Biology
  • Organic Chemistry

Cite this

Purification and Characterization of Two Chitinases from the Leaves of Pokeweed(Phytolacca americana). / Ohta, Moriya; Yamagami, Takeshi; Funatsu, Gunki.

In: Bioscience, biotechnology, and biochemistry, Vol. 59, No. 4, 01.01.1995, p. 656-661.

Research output: Contribution to journalArticle

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