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Title 

Protein purification and nucleotide sequence of a lysozyme from the bacteria-induced larvae of the fall webworm, Hyphantria cunea

Authors 

Ho Yong ParkSoon Sik ParkSang Woon ShinDoo Sang ParkMi Gwang KimHyun Woo OhChang Kyeong Joo

Publisher 

Wiley-Blackwell

Issue Date 

1997

Citation 

Archives of Insect Biochemistry and Physiology, vol. 35, no. 3, pp. 335-345

Keywords 

Hyphantria cuneafall webwormlysozymeimmunityprotein sequencenucleotide sequence

Abstract 

A protein with lytic activity against Micrococcus luteus was purified from the hemolymph of the fall webworm, Hyphantria cunea, larvae challenged with live E. coli. A bacteriolytic protein of about 14,000 daltons in mass was purified by cation exchange chromatography and reverse-phased HPLC. The optimum pH and optimum temperature range for activity were around pH 6.2 and 50°C, respectively, in a 100 mM phosphate buffer. The amino-terminal amino acid sequence of this protein was determined and the corresponding cDNA was isolated and analyzed. The deduced protein of 142 amino acid residues was composed of a putative leader sequence of 20 residues and the mature enzyme of 122 residues. The cloned lysozyme gene was strongly induced in response to bacterial injection, implying that the enzyme is a part of the immune response of H. cunea. Comparison with other known lysozyme sequences shows that our lysozyme belongs to the chicken lysozyme.

ISSN 

0739-4462

Appears in Collections

1. Journal Articles > Journal Articles

Registered Date

2017-04-19


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