Insights into the deselenization of selenocysteine into alanine and serine.
Insights into the deselenization of selenocysteine into alanine and serine.
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DOI:
10.1039/c5sc02528a
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发表时间:
2015-11-01
期刊:
影响因子:
8.4
通讯作者:
Metanis N
中科院分区:
文献类型:
--
作者:
Dery S;Reddy PS;Dery L;Mousa R;Dardashti RN;Metanis N
The deselenization of selenocysteine selectively removes the selenol group to give alanine under anaerobic conditions or serine under aerobic conditions (oxygen saturation). The development of native chemical ligation coupled with desulfurization has allowed ligation at several new ligation junctions. However, desulfurization also converts all cysteine residues in the protein sequence into alanine. Deselenization of selenocysteine, in contrast, selectively removes the selenol group to give alanine in the presence of unprotected cysteines. In this study we shed more light onto the deselenization mechanism of selenocysteine to alanine and provide optimized conditions for the reaction. The deselenization can be accomplished in one minute under anaerobic conditions to give alanine. Under aerobic conditions (oxygen saturation), selenocysteine is converted into serine.
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