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Nachweis einer direkten Isomerisierung von Mannose zu Fructose und ihre Bedeutung für den Mannosestoffwechsel von Pseudomonas syringae pv. phaseolicola

✍ Scribed by J. Sauerstein; M. Ramm; K. Schubert; Prof. Dr. G. Reuter

Publisher
John Wiley and Sons
Year
1988
Tongue
English
Weight
392 KB
Volume
28
Category
Article
ISSN
0233-111X

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✦ Synopsis

The phytopathogenic pseudomonad P x d m o n a s syringae pv. phaseolicola possesses an isomerase which converts mannose to fructose. The synthesis of this enzyme is constitutive. The KM value for mannose is 0.02 M. F 2 + ;M$+ and Mn2' ions stimulate the enzyme activity, whereas Cu2 + and ZnZ+ iones are inhibitors.

Since the enzymes mannokinase and phosphomannose isomerase could not be detected, the isomerase and an inducible fructokinase must have a function in the metabolism of mannose by this bacterium.

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✍ J. Sauerstein; R. Schade; J. Emde; Prof. Dr. G. Reuter 📂 Article 📅 1991 🏛 John Wiley and Sons 🌐 English ⚖ 296 KB

The plant pathogenic Pseudomonas syringae pv. phaseolicola possesses a fructokinase which is epigenetically regulated. The KM values for fructose and ATP are 0.56 and 0.53 niM, respectively. About 23% of the activity observed with ATP was obtained with equimolar amounts of ITP. CTP, GTP, UTP, PEP an