Nitrite-Specific Active Transport System of the Cyanobacterium Synechococcus sp. Strain PCC 7942 |
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Authors: | Shin-ichi Maeda Masato Okamura Masaki Kobayashi Tatsuo Omata |
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Affiliation: | Department of Applied Biological Sciences, School of Agricultural Sciences, Nagoya University, Nagoya 464-8601, Japan |
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Abstract: | Studies on the nitrite uptake capability of a mutant of Synechococcus sp. strain PCC 7942 lacking the ATP-binding cassette-type nitrate-nitrite-bispecific transporter revealed the occurrence of a nitrite-specific active transport system with an apparent Km (NO2−) of about 20 μM. Similar to the nitrate-nitrite-bispecific transporter, the nitrite-specific transporter was reversibly inhibited by ammonium in the medium. |
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