C‐mannosylation regulates stabilization of RAMP1 protein and RAMP1‐mediated cell migration
C‐mannosylation regulates stabilization of RAMP1 protein and RAMP1‐mediated cell migration
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C-甘露糖基化调节 RAMP1 蛋白的稳定性和 RAMP1 介导的细胞迁移
DOI:
10.1111/febs.16592
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发表时间:
2022
期刊:
影响因子:
--
通讯作者:
Simizu Siro
中科院分区:
文献类型:
--
作者:
Mizuta Hayato;Takakusaki Ayane;Suzuki Takehiro;Otake Keisuke;Dohmae Naoshi;Simizu Siro
C‐mannosylation is a unique type of protein glycosylation via C‐C linkage between an α‐mannose and a tryptophan residue. This modification has been identified in about 30 proteins and regulates several functions, such as protein secretion and intracellular localization, as well as protein stability. About half ofC‐mannosylated proteins are categorized as proteins containing thrombospondin type 1 repeat domain or type I cytokine receptors. To evaluate whetherC‐mannosylation broadly affects protein functions regardless of protein domain or family, we have sought to identify other types ofC‐mannosylated protein and analyse their functions. In this study, we focused on receptor activity modifying protein 1, which neither contains thrombospondin type 1 repeat domain nor belongs to the type I cytokine receptors. Our mass spectrometry analysis demonstrated that RAMP1 isC‐mannosylated at Trp56. It has been shown that RAMP1 transports to the plasma membrane after dimerization with calcitonin receptor‐like receptor and is important for ligand‐dependent downstream signalling activation. Our results showed thatC‐mannosylation has no effect on this transport activity. On the other hand,C‐mannosylation did enhance protein stability and cell migration activity. Our data may provide new insight into bothC‐mannosylation research and novel RAMP1 analysis.
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