Kutty, R Krishnan and Devi, N Abitha and Veeraswamy, M and Ramesh, S and Rao, PV Subba (1977) Degradation of (+/-)-synephrine by Arthrobacter synephrinum. Oxidation of 3,4-dihydroxyphenylacetate to 2-hydroxy-5-carboxymethyl-muconate semialdehyde. In: Biochemical Journal, 167 (1). pp. 163-170.
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1. Cell-free extracts of Arthrobacter synephrinum catalyse the oxidation of 3,4-dihydroxy-phenylacetate. 2. The product of oxidation was characterized as 2-hydroxy-5-carboxymethylmuconate semialdehyde from its chemical behaviour as well as from nuclear-magnetic-resonance spectra. 3. A 3,4-dihydroxyphenylacetate 2,3-dioxygenase (EC 220.127.116.11) was partially purified from A. synephrinum. 4. The enzyme had a Km of 25 micrometer towards its substrate and exhibited typical Michaelis-Menten kinetics. 5. The enzyme also catalysed the oxidation of 3,4-dihydroxymandelate and 3,4-dihydroxyphenylpropionate, at reaction rates of 0.5 and 0.04 respectively of that for 3,4-dihydroxyphenylacetate. 6. The enzyme was sensitive to treatment with thiol-specific reagents. 7. The molecular weight of the enzyme as determined by Sephadex G-200 chromatography was approx. 282000.
|Item Type:||Journal Article|
|Additional Information:||Copyright of this article belongs to Portland Press.|
|Department/Centre:||Division of Biological Sciences > Biochemistry|
|Date Deposited:||21 Jan 2010 10:23|
|Last Modified:||19 Sep 2010 05:49|
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