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相关概念视频

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The addition or removal of phosphate groups from proteins is the most common chemical modification that regulates cellular processes. These modifications can affect the structure, activity, stability, and localization of proteins within cells as well as their interactions with other proteins.
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Microtubule function and architecture are regulated by an array of specialized proteins called microtubule-associated proteins or MAPs. These proteins are widespread across different organisms and have conserved protein motifs, like the multi-TOG domain for tubulin binding found in the CLASP family of MAPs. Some MAPs are lineage-specific based on their conserved domains. Their functions depend upon the cytoskeletal architecture and cell type they are located within. In-plant cells, a specific...
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The mammalian target of rapamycin  (mTOR) is a serine/threonine kinase that regulates growth, proliferation, and cell survival in response to hormones, growth factors, or nutrient availability. This kinase exists in two structurally and functionally distinct forms: mTOR complex 1  (mTORC1) and mTOR complex 2  (mTORC2). The first form (mTORC1) is composed of a rapamycin-sensitive Raptor and proline-rich Akt substrate, PRAS40. In contrast,  mTORC2 consists of a...
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Identification of Cyclin-dependent Kinase 1 Specific Phosphorylation Sites by an In Vitro Kinase Assay
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p57Kip2酸化调节其局部化,稳定性和相互作用.

Emanuela Stampone1, Debora Bencivenga1, Luisa Dassi1

  • 1Department of Precision Medicine, University of Campania "Luigi Vanvitelli", 80138 Naples, Italy.

International journal of molecular sciences
|October 26, 2024
PubMed
概括

人类p57Kip2蛋白是广泛酸化的,与其家族成员p21Cip1/WAF1和p27Kip1.1不同. 它的酸化状态影响结合CDK等合作伙伴,影响细胞作用.

关键词:
在CIP/Kip中使用.在PTM的PTM.细胞循环中的细胞循环.在p57Kip2中使用.酸化的方法是:光化.两维分析的二维分析.

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科学领域:

  • 细胞生物学 细胞生物学
  • 分子生物学分子生物学
  • 蛋白质生物化学 蛋白质生物化学

背景情况:

  • p57Kip2是循环素依赖激酶 (CDK) 抑制蛋白 (CIP/Kip) 家族的一员.
  • p57Kip2是一种固有非结构化蛋白 (IUP),可获得的数据有限,特别是在人类中.
  • 翻译后的修改,特别是酸化,对于像p57Kip2这样的IUPs至关重要,影响本地化,稳定性和相互作用.

研究的目的:

  • 为了研究人类p57Kip2.2.的酸化模式.
  • 为了比较p57Kip2与p21Cip1/WAF1和p27Kip1.1的酸化情况.
  • 了解p57Kip2酸化如何影响其与结合伙伴的相互作用.

主要方法:

  • 使用二维凝电泳来分析p57Kip2.2.的酸化模式.
  • 在异步和同步细胞的细胞质和核部分中检查了形形的分布.
  • 评估了p57Kip2及其合作伙伴 (CDK,LIMK1,CRM1) 与酸化状态之间的相互作用.

主要成果:

  • 与p21Cip1/WAF1和p27Kip1.1相比,人类的p57Kip2具有广泛的酸化.
  • 在核 (未经修改的形式) 和细胞质 (酸性形式) 中观察到明显的形分布.
  • p57Kip2的酸化状态显著影响其与CDK,LIMK1和CRM1等合作伙伴的结合亲和力.

结论:

  • 在CIP/Kip家族中,p57Kip2表现出独特而广泛的酸化特征.
  • 对于p57Kip2异型的差异定位表明它们具有特定的调节作用.
  • 识别特定的酸化残留物对于充分阐明p57Kip2的功能及其相互作用至关重要.