Expression of functional recombinant human lysozyme in transgenic rice cell culture

Jianmin Huang, Liying Wu, Dorice Yalda, Yuriko Adkins, Shannon L. Kelleher, Michael Crane, Bo Lonnerdal, Raymond L. Rodriguez, Ning Huang

Research output: Contribution to journalArticle

88 Citations (Scopus)

Abstract

Using particle bombardment-mediated transformation, a codon-optimized synthetic gene for human lysozyme was introduced into the calli of rice (Oryza sativa) cultivar Taipei 309. The expression levels of recombinant human lysozyme in the transformed rice suspension cell culture approached approximately 4% of total soluble protein. Recombinant human lysozyme was purified to greater than 95% homogeneity using a two-step chromatography process. Amino acid sequencing verified that the N-terminus of the mature recombinant human lysozyme was identical to native human lysozyme. This indicates that the rice RAmy3D signal peptide was correctly cleaved off from the human lysozyme preprotein by endogenous rice signal peptidase. Recombinant human lysozyme was found to have the same molecular mass, isoelectric point and specific activity as native human lysozyme. The bactericidal activity of recombinant human lysozyme was determined by turbidimetric assay using Micrococcus lysodeikticus in 96-well microtiter plates. The bactericidal activity of lysozyme on Gram-negative bacteria was examined by adding purified lysozyme to mid-log phase cultures of E. coli strain JM109. In this study, significant bactericidal activity was observed after E. coli cells were exposed to recombinant human lysozyme for 60 min. Both native and recombinant human lysozyme displayed the same thermostability and resistance to degradation by low pH. The potential for using rice-derived lysozyme as an antimicrobial food supplement, particularly for infant formula and baby foods, is discussed.

Original languageEnglish (US)
Pages (from-to)229-239
Number of pages11
JournalTransgenic Research
Volume11
Issue number3
DOIs
StatePublished - 2002

Fingerprint

Muramidase
lysozyme
cell culture
Cell Culture Techniques
genetically modified organisms
rice
Oryza
Population Groups
Escherichia coli
Synthetic Genes
synthetic genes
Micrococcus
Micrococcus luteus
Infant Formula
infant foods
peptidases
Protein Sequence Analysis
Isoelectric Point
Bony Callus
infant formulas

Keywords

  • Infant formula
  • Lysozyme activity assay
  • Lysozyme ELISA
  • Recombinant human lysozyme
  • Transgenic rice

ASJC Scopus subject areas

  • Genetics
  • Plant Science
  • Applied Microbiology and Biotechnology
  • Molecular Biology
  • Biotechnology
  • Food Science

Cite this

Huang, J., Wu, L., Yalda, D., Adkins, Y., Kelleher, S. L., Crane, M., ... Huang, N. (2002). Expression of functional recombinant human lysozyme in transgenic rice cell culture. Transgenic Research, 11(3), 229-239. https://doi.org/10.1023/A:1015663706259

Expression of functional recombinant human lysozyme in transgenic rice cell culture. / Huang, Jianmin; Wu, Liying; Yalda, Dorice; Adkins, Yuriko; Kelleher, Shannon L.; Crane, Michael; Lonnerdal, Bo; Rodriguez, Raymond L.; Huang, Ning.

In: Transgenic Research, Vol. 11, No. 3, 2002, p. 229-239.

Research output: Contribution to journalArticle

Huang, J, Wu, L, Yalda, D, Adkins, Y, Kelleher, SL, Crane, M, Lonnerdal, B, Rodriguez, RL & Huang, N 2002, 'Expression of functional recombinant human lysozyme in transgenic rice cell culture', Transgenic Research, vol. 11, no. 3, pp. 229-239. https://doi.org/10.1023/A:1015663706259
Huang, Jianmin ; Wu, Liying ; Yalda, Dorice ; Adkins, Yuriko ; Kelleher, Shannon L. ; Crane, Michael ; Lonnerdal, Bo ; Rodriguez, Raymond L. ; Huang, Ning. / Expression of functional recombinant human lysozyme in transgenic rice cell culture. In: Transgenic Research. 2002 ; Vol. 11, No. 3. pp. 229-239.
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