Activity of the Enterococcus faecalis EIIA(gnt) PTS component and its strong interaction with EIIB(gnt).
Activity of the Enterococcus faecalis EIIA(gnt) PTS component and its strong interaction with EIIB(gnt).
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粪肠球菌 EIIA(gnt) PTS 成分的活性及其与 EIIB(gnt) 的强相互作用
DOI:
10.1016/j.bbrc.2009.08.100
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发表时间:
2009
影响因子:
3.1
通讯作者:
Brockmeier
中科院分区:
文献类型:
--
作者:
Brockmeier
Eubacteria can import and simultaneously phosphorylate a range of different carbohydrates by means of sugar specific phosphoenolpyruvate (PEP) dependent sugar phosphotransferase systems (PTSs). Here, we report the biochemical characterization of the gluconate specific PTS component EIIAgntfrom Enterococcus faecalis and its unexpectedly strong complex with EIIBgnt. We analyze the activity of the complex regarding phosphoryl transfer using kinetic measurements and demonstrate by mutagenesis that His-9 of EIIAgntis essential for this process and represents most likely the phosphoryl group carrier of EIIAgnt. With a combination of isothermal titration calorimetry (ITC), analytical ultracentrifugation (AUC), native gel electrophoresis and chemical crosslinking experiments we show that EIIAgntand EIIBgntform a strong 2:2 heterotetrameric complex, which seems to be destabilized upon phosphorylation of EIIBgnt.
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影响因子:
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作者:
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通讯作者:
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影响因子:
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作者:
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通讯作者:
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DOI:
10.1016/j.bbrc.2009.08.054
发表时间:
2009-10
影响因子:
3.1
作者:
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通讯作者:
Stefan Reinelt;B. Koch;M. Hothorn;W. Hengstenberg;S. Welti;K. Scheffzek