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Fig 1

Fig 1. From: Taking the Starch out of Oral Biofilm Formation: Molecular Basis and Functional Significance of Salivary α-Amylase Binding to Oral Streptococci.

Schematic model of the localization and function of the α-amylase-binding proteins in S. gordonii. AbpA is bound to the cell wall and then released. It interacts with α-amylase, AbpB, and GtfG to form a complex. α-Amylase remains enzymatically active within the complex to allow hydrolysis of dietary starch to maltose and maltooligosaccharides, which are transported into the cell via an ABC transporter. These carbohydrates are ultimately metabolized for energy production, with lactic acid as an end product. Gene expression is influenced by metabolic end products as well as by α-amylase itself through its interaction with AbpA on the bacterial surface.

Anna E. Nikitkova, et al. Appl Environ Microbiol. 2013 Jan;79(2):416-423.

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