Abstract
The hemoglobin (VHb) from the Gram-negative bacterium Vitreoscilla was originally discovered in 1966 (1). It was initially thought to be a soluble form of the terminal oxidase of the respiratory chain (cytochrome bo) until its correct identification as a hemoglobin in 1986 (2). It was originally proposed that the role of VHb in Vitreoscilla is to help provide oxygen to the cell, particularly under conditions of oxygen shortage, to enhance respiratory ATP production. This idea fits well with the large induction in VHb levels that occurs at low oxygen concentrations (3). It was further proposed that VHb may deliver oxygen directly to cytochrome bo (3); supportive evidence, but not proof, exists for this idea (4–6).
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References
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Stark, B.C., Webster, D.A., Pagilla, K.R. (2004). Engineering of Bacteria Using the Vitreoscilla Hemoglobin Gene to Enhance Bioremediation of Aromatic Compounds. In: Walker, J.M., Spencer, J.F.T., Ragout de Spencer, A.L. (eds) Environmental Microbiology. Methods in Biotechnology, vol 16. Humana Press. https://doi.org/10.1385/1-59259-765-3:379
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DOI: https://doi.org/10.1385/1-59259-765-3:379
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