Lipid and Protein Co-Regulation of PI3K Effectors Akt and Itk in Lymphocytes.

Lipid and Protein Co-Regulation of PI3K Effectors Akt and Itk in Lymphocytes.
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DOI:
10.3389/fimmu.2015.00117
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发表时间:
2015
影响因子:
7.3
通讯作者:
Huang YH
Huang YH
中科院分区:
医学2区
文献类型:
--
作者:
Wang X;Hills LB;Huang YH

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磷脂酰肌醇3-激酶(PI 3-kinase,PI 3 K)通路转导对淋巴细胞功能至关重要的信号。PI 3 K在质膜上产生磷脂PIP 3,以募集含有普列克底物蛋白同源(PH)结构域的蛋白质-在数百种哺乳动物蛋白质中发现的保守结构域。PH结构域-PIP 3相互作用允许快速信号传播并赋予这些信号空间分量。激酶Akt和Itk是关键的PI 3 K效应子,其通过其PH结构域结合PIP 3并介导淋巴细胞中的重要过程,例如存活、活化和分化。在这里,我们审查的作用和调节PI 3 K信号在淋巴细胞中,特别强调Akt和Itk。我们还讨论了这些和其他含PH结构域的蛋白质,因为它们更广泛地与免疫细胞功能相关。最后,我们强调了新出现的PH结构域的多功能蛋白质结构域,往往结合脂质和蛋白质底物发挥其作用。
The phosphoinositide 3-kinase (PI 3-kinase, PI3K) pathway transduces signals critical for lymphocyte function. PI3K generates the phospholipid PIP3 at the plasma membrane to recruit proteins that contain pleckstrin homology (PH) domains – a conserved domain found in hundreds of mammalian proteins. PH domain–PIP3 interactions allow for rapid signal propagation and confer a spatial component to these signals. The kinases Akt and Itk are key PI3K effectors that bind PIP3 via their PH domains and mediate vital processes – such as survival, activation, and differentiation – in lymphocytes. Here, we review the roles and regulation of PI3K signaling in lymphocytes with a specific emphasis on Akt and Itk. We also discuss these and other PH domain-containing proteins as they relate more broadly to immune cell function. Finally, we highlight the emerging view of PH domains as multifunctional protein domains that often bind both lipid and protein substrates to exert their effects.
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