Tailored Cofactor Traps for the in Situ Detection of Hemithioacetal-Forming Pyridoxal Kinases.
Tailored Cofactor Traps for the in Situ Detection of Hemithioacetal-Forming Pyridoxal Kinases.
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用于原位检测半硫缩醛形成吡哆醛激酶的定制辅助因子陷阱
DOI:
10.1021/acschembio.0c00787
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发表时间:
2020
影响因子:
4
通讯作者:
Sieber
中科院分区:
文献类型:
--
作者:
Hübner;Dienemann J.-N;Friederich;Sieber
Pyridoxal kinases (PLK) are crucial enzymes for the biosynthesis of pyridoxal phosphate, an important cofactor in a plethora of enzymatic reactions. The evolution of these enzymes resulted in different catalytic designs. In addition to the active site, the importance of a cysteine, embedded within a distant flexible lid region, was recently demonstrated. This cysteine forms a hemithioacetal with the pyridoxal aldehyde and is essential for catalysis. Despite the prevalence of these enzymes in various organisms, no tools were yet available to study the relevance of this lid residue. Here, we introduce pyridoxal probes, each equipped with an electrophilic trapping group in place of the aldehyde to target PLK reactive lid cysteines as a mimic of hemithioacetal formation. The addition of alkyne handles placed at two different positions within the pyridoxal structure facilitates enrichment of PLKs from living cells. Interestingly, depending on the position, the probes displayed a preference for either Gram-positive or Gram-negative PLK enrichment. By applying the cofactor traps, we were able to validate not only previously investigatedStaphylococcus aureusandEnterococcus faecalisPLKs but alsoEscherichia coliandPseudomonas aeruginosaPLKs, unravelling a crucial role of the lid cysteine for catalysis. Overall, our tailored probes facilitated a reliable readout of lid cysteine containing PLKs, qualifying them as chemical tools for mining further diverse proteomes for this important enzyme class.
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影响因子:
15
作者:
Nodwell;Schneider;Sieber
通讯作者:
Sieber
DOI:
--
发表时间:
1990
期刊:
影响因子:
--
作者:
T. Ueda;K. Nakaya;S. Nagai;J. Sakakibara;M. Murata
通讯作者:
M. Murata
影响因子:
3.2
作者:
Nodwell M.B
通讯作者:
Nodwell M.B
DOI:
--
发表时间:
2016
期刊:
Biochemical and Biophysical Research Communications - BBRC
影响因子:
--
作者:
Meong Il Kim;M. Hong
通讯作者:
M. Hong