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Functional Diversity of Carbohydrate-Active Enzymes Enabling a Bacterium to Ferment Plant Biomass

Figure 6

Model of polysaccharide degradation and metabolism by C. phytofermentans. CAZymes (shown as the number of enzymes in CAZy families) are based on purified activities and are intra- or extracellular based on putative secretion signals.

Metabolic enzymes are shown as NCBI numbers and are proposed based on mRNA expression. Rhamnose transport and assimilation is based on pathway from [55]. Abbreviations are D-galacturonic acid (GA), L-rhamnose (R), D-mannose (M), D-glucose (Gc), D-galactose (G), D-xylose (X), L-arabinose (A), fructose (F), phosphate (P), pentose phosphate pathway (PPP), dihydroxyacetone-phosphate (DHAP), glyceraldehyde-3-phosphate (G3P). For each substrate, the number of significantly up-regulated extracellular solute binding proteins (ESB) and ABC transporters (ABC) are shown. Shaded regions show metabolism of glucose (green), mannose (blue), xylose and arabinose (yellow), rhamnose (orange), and galacturonic acid (red).

Figure 6

doi: https://doi.org/10.1371/journal.pgen.1004773.g006