Difference between revisions of "Part:BBa K1819003"

Revision as of 20:14, 18 September 2015

Rubber oxygenase A - rubber degrading enzyme

Part BBa_K1819003 corresponds to the coding sequence of rubber oxygenase A (Rox A) from Xanthomonas sp. strain 35Y (Gene bank accession code: AGT20506.1.) This 73 kDa protein is an extracellular enzyme that catalyzes oxidative C-C cleavage of poly(cis-1,4-isoprene) to a major product, 12-oxo-4,8-dimethyltrideca-4,8-diene-1-al (ODTD; C15 tri-isoprenoid), with specific activity measured as 0.3 mol min-1 per mg. Found not only in Xanthomonas sp. but also in other Gram-negative clearing zone formers, RoxA is structurally related to cytochrome c peroxidases and its function is associated to two covalently bound heme groups. Although recently characterized by Birke et al (1), the exact enzymatic mechanism of rubber degradation by RoxA has not yet been elucidated.

This protein was codon optimized and a courtesy of Professor Ph.D. Dieter Jendrossek from the University Stuttgart.

Figure 1 - Schematic representation of BBa_K1819003 insert

Such non-usual restriction sites may serve for cloning purposes that lead to expression of recombinant protein with no additional amino acid residue(s) between its coding sequence and the fused N-terminal tag.

Figure 2 - 3D structure of RoxA generated using PyMOL software (PDB code 4B2N).

Figure 3 - Restriction gel analysis of site-directed mutagenesis of RoxA to eliminate EcoRI restriction site. First column shows propagation plasmid control pUC9 with roxA (plasmid backbone was a courtesy of Professor Ph.D. Dieter Jendrossek). Second column shows pUC9 Professor Ph.D. Dieter Jendrossek cleaveaged with EcoRI and HindII restriction enzymes.

Figure 4 - Restriction gel analysis of RoxA in pSB1C3.

Please note this part was submitted in pSB1C3, the Registry's standard shipping backbone, according to submission requirements. However, pSB1C3 contains a SacI site and if you want to use this part we recommend to move the part into another plasmid backbone what can be easily done.

References

1. Birke J, Jendrossek D. Rubber oxygenase and latex clearing protein cleave rubber to different products and use different cleavage mechanisms. Applied and Environmental Microbiology. 2014;80(16):5012-5020.

Sequence and Features