Sandbox Reserved 1672

This protein has 2 large beta-sheets and 4 alpha-helices. The , binds with beta-sheet A. Beta sheet A also contains most of the catalytic amino acids.

Function of your protein

Alginate lyase, AlyC3, comes from the Psychromonas organism.

The function of AlyC3 is to degrade alginate. AlyC3 plays a role in b-elimination at the glycosidic 1,4-O link. This generates oligosaccharides or monosaccharides.

• insert rotating image of AlyC3 as a cartoon*

The known substrate for AlyC3 is polymannuronate (PM).

Biological relevance and broader implications

Alginate is a linear polysaccharide present in great abundance in brown seaweeds, accounting for ;40% dry weight of brown algae (1). Brown seaweeds are the most productive algae in marine ecosystems. For example, kelp forests produce large amounts of biomass rapidly, forming the basis of coastal food webs and constituting an important carbon sink (2). Therefore, alginate is an important marine polysaccharide and carrier of the marine carbon cycle. In addition to brown algae, alginate

Alginate lyases are

promising enzymes for the treatment of chronic lung infection by Pseudomonas aeruginosa (9). The synergistic action of endoand exolytic alginate lyases have remarkable potential for the production of biofuels by deconstructing the alginate-rich algal cell walls into monosaccharides (10, 11). Therefore, research on the characteristics and molecular catalytic mechanisms of alginate lyases is important to understand the degradation and recycling of alginate in the ocean and to facilitate the development of their industrial applications.

Important amino acids

Structural highlights

Other important features

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