Team:UESTC-China/Project

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So a more efficient and more low-carbon technology is in badly need to remove formaldehyde.
So a more efficient and more low-carbon technology is in badly need to remove formaldehyde.
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<p style="color:#1b1b1b;">As we all know that various plants can remove formaldehyde from indoor air by means of the uptake and metabolism <i>(Xu, Qin et al. 2010)</i>. It has been proved that formaldehyde as a central intermediate of photosynthetic carbon dioxide fixation in green plants can be removed by forming HM-GSH and finally turned to water and carbon dioxide (Fig.2A) . FALDH and FDH are the key enzymes for formaldehyde fixation. For the wild-type plants we know of now, they have limited capacity to metabolize formaldehyde and it's hard for them to survive in a high formaldehyde environment. At the same time, formaldehyde is also a key intermediate in the metabolism of several one-carbon (C1) compounds in methylotrophic microorganisms. Those microorganisms have a special metabolic pathway named ribulose monophosphate (RuMP) pathway (Fig.2B). 3-hexulose-6-phosphate (HPS) and 6-phospho-3-hexuloisomerase (PHI) are the key enzymes that affect the metabolism of formaldehyde. In the pathway, HPS fixes formaldehyde and D-ribulose-5-phosphate (Ru5P) to produce D-arabino-3-hexulose-6-phosphate (Hu6P), and 6-phospho-3-hexuloisomerase (PHI), which converts Hu6P to fructose-6-phosphate (F6P). Interestingly, Ru5P and F6P are also included in the Calvin-Benson cycle, so bacterial RuMP pathway and plant Calvin-Benson cycle can be connected if HPS and PHI can exist in plants.  
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<p style="color:#1b1b1b;">As we all know that various plants can remove formaldehyde from indoor air by means of the uptake and metabolism <i>(Xu et al., 2010)</i>. It has been proved that formaldehyde as a central intermediate of photosynthetic carbon dioxide fixation in green plants can be removed by forming HM-GSH and finally turned to water and carbon dioxide (Fig.2A) . FALDH and FDH are the key enzymes for formaldehyde fixation. For the wild-type plants we know of now, they have limited capacity to metabolize formaldehyde and it's hard for them to survive in a high formaldehyde environment. At the same time, formaldehyde is also a key intermediate in the metabolism of several one-carbon (C1) compounds in methylotrophic microorganisms. Those microorganisms have a special metabolic pathway named ribulose monophosphate (RuMP) pathway (Fig.2B). 3-hexulose-6-phosphate (HPS) and 6-phospho-3-hexuloisomerase (PHI) are the key enzymes that affect the metabolism of formaldehyde. In the pathway, HPS fixes formaldehyde and D-ribulose-5-phosphate (Ru5P) to produce D-arabino-3-hexulose-6-phosphate (Hu6P), and 6-phospho-3-hexuloisomerase (PHI), which converts Hu6P to fructose-6-phosphate (F6P). Interestingly, Ru5P and F6P are also included in the Calvin-Benson cycle, so bacterial RuMP pathway and plant Calvin-Benson cycle can be connected if HPS and PHI can exist in plants.  
If realized, the capacity of formaldehyde uptake and metabolism will be greatly advanced. In addition, the use of plants to remove toxins from the air is more likely to be accepted by the public.
If realized, the capacity of formaldehyde uptake and metabolism will be greatly advanced. In addition, the use of plants to remove toxins from the air is more likely to be accepted by the public.
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Revision as of 11:38, 17 October 2014

UESTC-China