Site-Directed Post-Translational Modification, Lys(Me) (CGGG), CloverDirect

Catalog No:
PRX-CLD2204
$4,149.00

Lys(Me) (CGGG)-charged aminoacyl-tRNA recognizes and suppresses the four base codon CGGG. It introduces an ε-methyl-Lys residue for post-translational modification studies.

CloverDirect™ tRNA Reagents for Site-Directed Protein Functionalization are designed for investigators who wish to incorporate unnatural amino acids at genetically defined positions of proteins using cell-free transcription/translation systems.

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About this maker: This item is a product of ProteinExpress Co. Ltd (Chiba, Japan), an R&D company expert cell-free protein synthesis and large scale cellular protein expression. See all ProteinExpress products at the ProteinExpress dashboard page.

CloverDirect tRNA Reagents for Site-Directed Protein Functionalization are designed to permit the incorporation of unnatural amino acids at defined positions within proteins using cell-free coupled transcription/translation systems, including PUREfrex® , PURESYSTEM® and The RYTS Kit. The incorporation positions of unnatural amino acids are defined by selectively introducing UAG amber or CGGG four-base codons into translation templates. For template construction, we recommend Protein Express Linear Template PCR kits (available in two forms: His-tag only or ProX-tag + His-tag) or expression plasmids from Protein Express (pROX-FL92.1: ProX-tag + His-tag) or BioComber (pURE1-4: no tags). The ProX tag is a special N-terminal peptide designed for the incorporation of certain large unnatural amino acids that require precise N-terminal positioning (codon 9) and a specific codon context (flanked by AAC and TCT). Codon 9 of the ProX tag can be varied between UAG, CGGG or TTT (as a control). During cell-free translation, unnatural amino acid-charged aminoacyl-tRNAs recognize either UAG amber or CGGG codons. If a UAG codon is recognized by release factor 1 (one of three termination factors), protein synthesis will be terminated. If the first three nucleotides of CGGG are recognized as a triplet codon by Arg-tRNA, the reading frame shifts to +1 and a downstream stop codon will terminate protein synthesis. Therefore, full-length translation products will contain unnatural amino acids at 100% efficiency.

CloverDirect™ offers off-the-shelf UAG or CGGG aminoacyl tRNAs charged with unnatural amino acids that permit:

  1. Fluorescent-labeling
  2. Biotin-labeling
  3. PEGylation
  4. Chemical crosslinking
  5. Photo-regulation of a variety of biological processes, including enzyme, receptor, and ion channel activity

In addition, custom services for the expression of proteins with unnatural amino acids are available upon request.


Documents & Links for Site-Directed Post-Translational Modification, Lys(Me) (CGGG), CloverDirect
Datasheet prx-cld2204_site-directed-post-translational-modification-lysme-cggg-cloverdirect_datasheet.pdf
Vendor Page Site-Directed Post-Translational Modification, Lys(Me) (CGGG), CloverDirect