Structural basis for the minimal bifunctional alginate epimerase AlgE3 from Azotobacter chroococcum.
FEBS Lett
; 598(11): 1422-1437, 2024 Jun.
Article
en En
| MEDLINE
| ID: mdl-38649293
ABSTRACT
Among the epimerases specific to alginate, some of them in Azotobacter genera convert ß-d-mannuronic acid to α-l-guluronic acid but also have lyase activity to degrade alginate. The remarkable characteristics of these epimerases make it a promising enzyme for tailoring alginates to meet specific demands. Here, we determined the structure of the bifunctional mannuronan C-5 epimerase AlgE3 from Azotobacter chroococcum (AcAlgE3) in complex with several mannuronic acid oligomers as well as in apo form, which allowed us to elucidate the binding manner of each mannuronic acid oligomer, and the structural plasticity, which is dependent on calcium ions. Moreover, a comprehensive analysis of the lyase activity profiles of AcAlgE3 combined with structural characteristics explained the preference for different chain length oligomers.
Palabras clave
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Azotobacter
/
Carbohidrato Epimerasas
/
Alginatos
Idioma:
En
Revista:
FEBS Lett
Año:
2024
Tipo del documento:
Article
País de afiliación:
Japón
Pais de publicación:
Reino Unido