Advanced search
1 file | 1.26 MB

Aberrant localization and underglycosylation of highly accumulating single-chain Fv-Fc antibodies in transgenic Arabidopsis seeds

Author
Organization
Abstract
Production of high-value recombinant proteins in transgenic seeds is an attractive and economically feasible alternative to conventional systems based on mammalian cells and bacteria. In contrast to leaves, seeds allow high-level accumulation of recombinant proteins in a relatively small volume and a stable environment. We demonstrate that single-chain variable fragment (scFv)-Fc antibodies, with N-terminal signal sequence and C-terminal KDEL tag, can accumulate to very high levels as bivalent IgG-like antibodies in Arabidopsis thaliana seeds and illustrate that a plant-produced anti-hepatitis A virus scFv-Fc has similar antigen-binding and in vitro neutralizing activities as the corresponding full-length IgG. As expected, most scFv-Fc produced in seeds contained only oligomannose-type N-glycans, but, unexpectedly, 35-40% was never glycosylated. A portion of the scFv-Fc was found in endoplasmic reticulum (ER)-derived compartments delimited by ribosome-associated membranes. Additionally, consistent with the glycosylation data, large amounts of the recombinant protein were deposited in the periplasmic space, implying a direct transport from the ER to the periplasmic space between the plasma membrane and the cell wall. Aberrant localization of the ER chaperones calreticulin and binding protein (BiP) and the endogenous seed storage protein cruciferin in the periplasmic space suggests that overproduction of recombinant scFv-Fc disturbs normal ER retention and protein-sorting mechanisms in the secretory pathway.
Keywords
molecular farming, glycosylation, recombinant antibody, subcellular localization, HEPATITIS-A VIRUS, ENDOPLASMIC-RETICULUM, MONOCLONAL-ANTIBODY, MASS-SPECTROMETRY, PICHIA-PASTORIS, TUMOR-GROWTH, PLANTS, PROTEINS, GENE, EXPRESSION

Downloads

  • (...).pdf
    • full text
    • |
    • UGent only
    • |
    • PDF
    • |
    • 1.26 MB

Citation

Please use this url to cite or link to this publication:

Chicago
Van Droogenbroeck, Bart, Jingyuan Cao, Johannes Stadlmann, Friedrich Altmann, Sarah Colanesi, Stefan Hillmer, David G Robinson, et al. 2007. “Aberrant Localization and Underglycosylation of Highly Accumulating Single-chain Fv-Fc Antibodies in Transgenic Arabidopsis Seeds.” Proceedings of the National Academy of Sciences of the United States of America 104 (4): 1430–1435.
APA
Van Droogenbroeck, B., Cao, J., Stadlmann, J., Altmann, F., Colanesi, S., Hillmer, S., Robinson, D. G., et al. (2007). Aberrant localization and underglycosylation of highly accumulating single-chain Fv-Fc antibodies in transgenic Arabidopsis seeds. PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 104(4), 1430–1435.
Vancouver
1.
Van Droogenbroeck B, Cao J, Stadlmann J, Altmann F, Colanesi S, Hillmer S, et al. Aberrant localization and underglycosylation of highly accumulating single-chain Fv-Fc antibodies in transgenic Arabidopsis seeds. PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA. 2007;104(4):1430–5.
MLA
Van Droogenbroeck, Bart, Jingyuan Cao, Johannes Stadlmann, et al. “Aberrant Localization and Underglycosylation of Highly Accumulating Single-chain Fv-Fc Antibodies in Transgenic Arabidopsis Seeds.” PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA 104.4 (2007): 1430–1435. Print.
@article{409442,
  abstract     = {Production of high-value recombinant proteins in transgenic seeds is an attractive and economically feasible alternative to conventional systems based on mammalian cells and bacteria. In contrast to leaves, seeds allow high-level accumulation of recombinant proteins in a relatively small volume and a stable environment. We demonstrate that single-chain variable fragment (scFv)-Fc antibodies, with N-terminal signal sequence and C-terminal KDEL tag, can accumulate to very high levels as bivalent IgG-like antibodies in Arabidopsis thaliana seeds and illustrate that a plant-produced anti-hepatitis A virus scFv-Fc has similar antigen-binding and in vitro neutralizing activities as the corresponding full-length IgG. As expected, most scFv-Fc produced in seeds contained only oligomannose-type N-glycans, but, unexpectedly, 35-40% was never glycosylated. A portion of the scFv-Fc was found in endoplasmic reticulum (ER)-derived compartments delimited by ribosome-associated membranes. Additionally, consistent with the glycosylation data, large amounts of the recombinant protein were deposited in the periplasmic space, implying a direct transport from the ER to the periplasmic space between the plasma membrane and the cell wall. Aberrant localization of the ER chaperones calreticulin and binding protein (BiP) and the endogenous seed storage protein cruciferin in the periplasmic space suggests that overproduction of recombinant scFv-Fc disturbs normal ER retention and protein-sorting mechanisms in the secretory pathway.},
  author       = {Van Droogenbroeck, Bart and Cao, Jingyuan and Stadlmann, Johannes and Altmann, Friedrich and Colanesi, Sarah and Hillmer, Stefan and Robinson, David G and Van Lerberge, Els and Terryn, Nancy and Van Montagu, Marc and Liang, Mifang and Depicker, Anna and De Jaeger, Geert},
  issn         = {0027-8424},
  journal      = {PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA},
  keywords     = {molecular farming,glycosylation,recombinant antibody,subcellular localization,HEPATITIS-A VIRUS,ENDOPLASMIC-RETICULUM,MONOCLONAL-ANTIBODY,MASS-SPECTROMETRY,PICHIA-PASTORIS,TUMOR-GROWTH,PLANTS,PROTEINS,GENE,EXPRESSION},
  language     = {eng},
  number       = {4},
  pages        = {1430--1435},
  title        = {Aberrant localization and underglycosylation of highly accumulating single-chain Fv-Fc antibodies in transgenic Arabidopsis seeds},
  url          = {http://dx.doi.org/10.1073/pnas.0609997104},
  volume       = {104},
  year         = {2007},
}

Altmetric
View in Altmetric
Web of Science
Times cited: