Crystal structure of human tyrosylprotein sulfotransferase-2 reveals the mechanism of protein tyrosine sulfation reaction.
Crystal structure of human tyrosylprotein sulfotransferase-2 reveals the mechanism of protein tyrosine sulfation reaction.
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人类酪氨酸蛋白磺基转移酶-2 的晶体结构揭示了蛋白酪氨酸硫酸化反应的机理。
DOI:
10.1038/ncomms2593
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发表时间:
2013
影响因子:
16.6
通讯作者:
中科院分区:
文献类型:
--
作者:
Post-translational protein modification by tyrosine-sulfation plays an important role in extracellular protein-protein interactions. The protein tyrosine sulfation reaction is catalyzed by the Golgi-enzyme called the tyrosylprotein sulfotransferase (TPST). To date, no crystal structure is available for TPST. Detailed mechanism of protein tyrosine sulfation reaction has thus remained unclear. Here we present the first crystal structure of the human TPST isoform 2 (TPST2) complexed with a substrate peptide (C4P5Y3) derived from complement C4 and 3’-phosphoadenosine-5’-phosphate (PAP) at 1.9Å resolution. Structural and complementary mutational analyses revealed the molecular basis for catalysis being an SN2-like in-line displacement mechanism. TPST2 appeared to recognize the C4 peptide in a deep cleft by using a short parallel β-sheet type interaction, and the bound C4P5Y3 forms an L-shaped structure. Surprisingly, the mode of substrate peptide recognition observed in the TPST2 structure resembles that observed for the receptor type tyrosine kinases.
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DOI:
10.1107/s0907444904019158
发表时间:
2004-12-01
影响因子:
2.2
作者:
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通讯作者:
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影响因子:
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