Academic Journal
Crystal structure of a novel xylose isomerase from Streptomyces sp. F-1 revealed the presence of unique features that differ from conventional classes
| العنوان: | Crystal structure of a novel xylose isomerase from Streptomyces sp. F-1 revealed the presence of unique features that differ from conventional classes |
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| المؤلفون: | Miyamoto, Renan Yuji, Sousa, Amanda Silva de, Vieira, Plinio Salmazo, Melo, Ricardo Rodrigues de, Scarpassa, Josiane Aniele, Inacio Ramos, Carlos Henrique, Murakami, Mario Tyago, Ruller, Roberto, Zanphorlin, Leticia Maria |
| المساهمون: | Universidade Estadual Paulista (UNESP) |
| بيانات النشر: | Elsevier B.V. |
| سنة النشر: | 2020 |
| المجموعة: | Universidade Estadual Paulista São Paulo: Repositório Institucional UNESP |
| مصطلحات موضوعية: | Xylose isomerase, Crystal structure, Enzyme kinetics, Structure-function relationship, Hemicellulosic fraction, Biofuels |
| الوصف: | Background: Enzymatic isomerization is a promising strategy to solve the problem of xylose fermentation and, consequently, to leverage the production of advanced biofuels and biochemicals. In a previous work, our research group discovered a new strain of Streptomyces with great biotechnological potential due to its ability to produce a broad arsenal of enzymes related to lignocellulose degradation. Methods: We applied a multidisciplinary approach involving enzyme kinetics, biophysical methods, small angle X-ray scattering and X-ray crystallography to investigate two novel xylose isomerases, XylAlF1 and XylA2F1, from this strain. Results: We showed that while XylAlF1 prefers to act at lower temperatures and relatively lower pH, XylA2F1 is extremely stable at higher temperatures and presents a higher turnover number. Structural analysis revealed that XylA1F1 exhibits unique properties in the active site not observed in classical XylAs from classes I and II nor in its ortholog XylA2F1. It encompasses the natural substitutions, M86A and T93K, that create an extra room for substrate accommodation and narrow the active-site entrance, respectively. Such modifications may contribute to the functional differentiation of these enzymes. Conclusions: We have characterized two novel xylose isomerases that display distinct functional behavior and harbor unprecedented amino-acid substitutions in the catalytic interface. General significance: Our findings contribute to a better understanding of the functional and structural aspects of xylose isomerases, which might be instrumental for the valorization of the hemicellulosic fraction of vegetal biomass. |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | English |
| تدمد: | 0304-4165 |
| Relation: | Biochimica Et Biophysica Acta-general Subjects; http://dx.doi.org/10.1016/j.bbagen.2020.129549; Biochimica Et Biophysica Acta-general Subjects. Amsterdam: Elsevier, v. 1864, n. 5, 10 p., 2020.; http://hdl.handle.net/11449/195264; WOS:000520950300002 |
| DOI: | 10.1016/j.bbagen.2020.129549 |
| الاتاحة: | http://hdl.handle.net/11449/195264 https://doi.org/10.1016/j.bbagen.2020.129549 |
| رقم الانضمام: | edsbas.A16E35E7 |
| قاعدة البيانات: | BASE |
| تدمد: | 03044165 |
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| DOI: | 10.1016/j.bbagen.2020.129549 |