Novel type of heme-dependent oxygenase catalyzes oxidative cleavage of rubber (Poly-cis-1,4-Isoprene)

Article Abstract:

An extraceelular protein with strong absorption at 406 nm is purified from cell-free culture fluid of latex-grown Xanthomonas sp. strain 35Y. The purified protein degraded both natural rubber latex and chemosynthetic poly(cis-1,4-isoprene) in vitro by oxidative cleavage of the double bonds of poly(cis-1,4-isoprene).

---

Physiological and chemical investigations into microbial degradation of synthetic poly(cis-1,4-isoprene)

Article Abstract:

Research demonstrates that synthetic high-molecular weight poly(cis-1,4-isoprene) and natural rubber are degraded by Streptomyces coelicolor 1A and Pseudomonas citronellolis into their low-molecular weight counterparts. Data on the oxidation of poly(cis-1,4-isoprene) to diketones are presented.

United States, Statistical Data Included, Analysis, Physiological aspects, Polymers, Biodegradation, Bacteria, Ketones, Rubber chemistry

---

Heme-dependent rubber oxygenase RoxA of Xanthomonas sp. cleaves the carbon backbone of poly(cis-1,4-isoprene) by a dioxygenase mechanism

Article Abstract:

Oxidative cleavage of poly(cis-1,4-isoprene) is investigated by rubber oxygenase RoxA purified from Xanthomonas sp. Based on the labeling results and the presence of two hemes in RoxA, a model of the enzymatic cleavage mechanism of poly(cis-1,4-isoprene) is proposed.

Similar abstracts:

• Abstracts: Negative regulation of dE2F1 by cyclin-dependent kinases controls cell cycle timing. Regeneration and transdetermination: New tricks from old cells
• Abstracts: Histone modification-dependent and -independent pathways for recruitment of checkpoint protein Crb2 to double-strand breaks
• Abstracts: A CK2-dependent mechanism for degradation of the PML tumor suppressor. Phosphorylation and functional inactivation of TSC2 by Erk: Implications for tuberous sclerosis and cancer pathogenesis
• Abstracts: Role of the regulatory gene rirA in the transcriptional response of Sinorhizobium meliloti to iron limitation
• Abstracts: Reduced genetic variation occurs among genes of the highly clonal plant pathogen Xanthomonas axonopodis pv. vesicatoria, including the effector gene avrBs2

This website is not affiliated with document authors or copyright owners. This page is provided for informational purposes only. Unintentional errors are possible.