Octameric structure of Staphylococcus aureus enolase in complex with phosphoenolpyruvate

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• 作者：Yunfei Wu ; Chengliang Wang ; Shenglong Lin ; Minhao Wu ; Lu Han ; Changlin Tian ; Xuan Zhang and Jianye Zang
• 关键词：enolase ; Staphylococcus aureus ; complex structure ; octamerization
• 刊名：Acta Crystallographica Section D
• 出版年：2015
• 出版时间：December 2015
• 年：2015
• 卷：71
• 期：12
• 页码：2457-2470
• 全文大小：3732K
• ISSN：1399-0047

文摘

Staphylococcus aureus is a Gram-positive bacterium with strong pathogenicity that causes a wide range of infections and diseases. Enolase is an evolutionarily conserved enzyme that plays a key role in energy production through glycolysis. Additionally, enolase is located on the surface of S. aureus and is involved in processes leading to infection. Here, crystal structures of Sa_enolase with and without bound phosphoenolpyruvate (PEP) are presented at 1.6 and 2.45 Å resolution, respectively. The structure reveals an octameric arrangement; however, both dimeric and octameric conformations were observed in solution. Furthermore, enzyme-activity assays show that only the octameric variant is catalytically active. Biochemical and structural studies indicate that the octameric form of Sa_enolase is enzymatically active in vitro and likely also in vivo, while the dimeric form is catalytically inactive and may be involved in other biological processes.