Potato modified to synthesise fusion spider silk/ elastin protein | BCH-LMO-SCBD-100315 | Living Modified Organism | Biosafety Clearing-House

Loading...
Living Modified Organism (LMO)
  |  
BCH-LMO-SCBD-100315-5   |   PDF   |   Print   |  
Decisions on the LMO Risk Assessments  
published: 21 Jul 2009 last updated: 07 May 2013
Living Modified Organism identity
The image below identifies the LMO through its unique identifier, trade name and a link to this page of the BCH. Click on it to download a larger image on your computer. For help on how to use it go to the LMO quick-links page.
Potato modified to synthesise fusion spider silk/ elastin protein
EN
2 lines: pCB301-Kan-MaSpI-100xELP-3 and -6
No
Potatoes pCB301-Kan-MaSpI-100xELP produce a fusion protein consisting of the spider silk protein MaSPI and an artificial elastin which is mainly observed in tubers.
Female golden silk orb weaver spiders Nephila clavipes incorporate MaSpI protein within the very strong and elastic silk of the main threads of the spider net which is of high industrial interest. The artificial elastin 100xELP has high similarity to human elastin and consists of oligomeric repeats of the pentapeptide Val-Pro-Gly-Xaa-Gly (Xaa – any amino acid but proline). 100xELP exhibits a good ability to be solved in aqueous solution depending on salt concentration and temperature. It can undergo an inverse transition, i.e. the protein is soluble in an aqueous solution below its transition temperature but insoluble above this critical value. This characteristic is delegated to its fusion partner MaSpI resulting in easy isolation and purification of spider silk protein from the biomass of potato tubers.
EN
The term “Recipient organism” refers to an organism (either already modified or non-modified) that was subjected to genetic modification, whereas “Parental organisms” refers to those that were involved in cross breeding or cell fusion.
EN
Characteristics of the modification process
pCB301-Kan-MaSpI-100xELP  (derivate of pCB301-Kan from pBIN19)
EN
  • Agrobacterium-mediated DNA transfer
Some of these genetic elements may be present as fragments or truncated forms. Please see notes below, where applicable.
The introduced recombinant DNA includes two gene cassettes.

First, the fusion protein consisting of the spider silk protein MaSpI and the elastin-like protein 100xELP carries the signal peptide LeB4 for translocation to the endoplasmic reticulum (ER) at the N-terminus and the KDEL signal peptide for retention in the ER at the C-terminus. The expression of this construct is controlled by the CaMV 35S promoter and –terminator. 

Second, a nptII gene cassette consisting of the nos promoter, the nptII gene and nos terminator serves as a selection marker system via aminoglycoside antibiotics.
EN
LMO characteristics
EN
  • Research
Detection method(s)
EN
Loading...