L1_sAP_Strep_RBD_Strep8His, MocloMania Composite
This composite part contains the sAP secretion signal, an N-terminal Strep-tag II fused with an HRV 3C protease recognition motif, a coding sequence for the SARS-CoV-2 receptor binding domain as well as a C-terminal Strep8His-tag. The invidual basic parts are joined together by the MoClo connectors for B2/B3, B3/B4 and B4/B5.
L1_sAP_Strep_RBD_Strep8His allows for transgenic expression of the SARS-CoV2 receptor binding domain in Leishmania tarentolae and secretion of the fusion protein into the culture medium. By concentrating the culture medium and running it over a nickel / cobalt resin or a Strep-Tactin column, the Strep8His-tagged RBD should be able to be purified. The redundance in adding two Strep-tag II to the fusion protein is motivated by the purpose of generating L1 constructs that verify the correct design and construction of the respective B3 basic part..
size 876 bp
antibiotic resistance in E. Coli ampicillin
plasmid backbone weird_plex
We were able to successfully assembly this composite part into our L1 expression vector weird_plex and confirm the integrity of the resulting L1 construct via restriction digest and gel electrophoresis, see Figure 1. Along with subsequent sequencing, this verified the correct adaptation of the underlying basic parts to the MoClo cloning standard. Due to its redundance in fusion tags, this composite part was not transfected into Leishmania.
The MocloMania collection
This L1 construct was assembled using basic parts from the MocloMania collection, the very first collection of genetic parts specifically designed and optimized for Modular Cloning assembly and recombinant protein expression in the protozoan parasite Leishmania tarentolae.
Are you trying to express complexly glycosylated proteins? Large antibody side chains? Human proteins that require accurate post-translational modification? Then Leishmania might be just the right organism for you! Leishmania tarentolae’s glycosylation patterns resemble those of human cells more closely than any other microbial expression host, while still delivering all the benefits of microbial production systems like easy transfection and cultivation. So instead of relying on mammalian cell lines, try considering Leishmania as your new expression host of choice!
Our MocloMania collection will allow you to easily modify your protein of choice and make it suitable for downstream detection and purification procedures - all thanks to the help of Modular Cloning. This cloning system was first established by Weber et al. in 2011 and relies on the ability of type IIS restriction enzymes to cut DNA outside of their recognition sequence, hereby generating four nucleotide overhangs. Every basic part in our collection is equipped with a specified set of overhangs that assign it to its designated position within the reading frame. These so-called cloning positions are labelled B2-B5 from upstream to downstream. By filling all positions with the basic parts of your choice, you can easily generate variable genetic constructs that code for the fusion protein of your desire.
We furthermore provide a specifically domesticated Leishmania expression vector, named weird_plex, which will package your fusion construct into a functional transcriptional unit that is optimized for high expression in Leishmania.
The best part? Because of the type IIS restriction properties and the specifity of the generated overhangs, restriction and ligation of your construct can all happen simultaneously in a simple one-step, one-pot reaction. This will safe you a lot of time and frustration in your cloning endeavours!
Do we have your attention? In the table below you can find some basic information on how our cloning system, along with most other MoClo systems, is set up. Please feel free to check out our wiki to find more information on Leishmania and Modular Cloning as well as to understand how the part that you are looking at integrates into our part collection. See you there!
|Level||What does this level contain?||antibiotic resistance||Enzyme used for ligation|
|L0||The foundation to every MoClo construct which are basic genetic units, such as coding sequences, promoters, terminators||spectinomycin||BbsI|
|L1||Several L0 parts assembled into a functional transcriptional unit, e.g. consisting of promoter, coding region and terminator||ampicillin||BsaI|
|L2||Multiple transcriptional units added into one multi-gene construct, e.g. a protein of interest fused to a selection marker||kanamycin||BbsI|
Sequence and Features
- 10Illegal PstI site found at 664
- 12Illegal PstI site found at 664
- 21Illegal BglII site found at 602
Illegal XhoI site found at 6
- 23Illegal PstI site found at 664
- 25Illegal PstI site found at 664
Illegal NgoMIV site found at 750
- 1000Illegal SapI.rc site found at 774
- Langer T, Corvey C, Kroll K, Boscheinen O, Wendrich T, Dittrich W. Expression and purification of the extracellular domains of human glycoprotein VI (GPVI) and the receptor for advanced glycation end products (RAGE) from Rattus norvegicus in Leishmania tarentolae. Prep Biochem Biotechnol. 2017 Nov 26;47(10):1008-1015. doi: 10.1080/10826068.2017.1365252. Epub 2017 Aug 31. PMID: 28857681.
- Weber E, Engler C, Gruetzner R, Werner S, Marillonnet S (2011) A Modular Cloning System for Standardized Assembly of Multigene Constructs. PLoS ONE 6(2): e16765. https://doi.org/10.1371/journal.pone.0016765