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ENZYME entry: EC

Accepted Name
Endo-cleaving rubber dioxygenase.
Alternative Name(s)
Latex clearing protein.
Reaction catalysed
Cleavage of cis-1,4-polyisoprene polymers into a mixture of compounds, including a C(20) compound ((4Z,8Z,12Z,16Z,20Z,24Z)-4,8,12,16,20,24-hexamethyl-28-oxononacosa-4,8,12,16,20,24-hexaenal), a C(25) compound ((4Z,8Z,12Z,16Z,20Z)-4,8,12,16,20-pentamethyl-24-oxopentacosa-4,8,12,16,20-pentaenal), a C(30) compound ((4Z,8Z,12Z,16Z)-4,8,12,16-tetramethyl-20-oxohenicosa-4,8,12,16-tetraenal), and higher molecular weight compounds
  • The enzyme catalyzes the cleavage of the double bonds in natural and synthetic rubber, producing a mixture of C(20), C(25), C(30), and higher oligo-isoprenoids with ketone and aldehyde groups at their ends.
  • Two unrelated bacterial enzymes are known to possess this activity - the enzyme from Streptomyces sp. K30 (Lcp) contains a b-type cytochrome, while the enzyme from Xanthomonas sp. 35Y, (RoxB) contains two c-type cytochromes.
  • Both enzymes attack the substrate at random locations, and are not able to cleave the C(35) or smaller products into shorter fragments.
PRIAM enzyme-specific profiles1.13.11.87
KEGG Ligand Database for Enzyme Nomenclature1.13.11.87
IUBMB Enzyme Nomenclature1.13.11.87
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