重新思考图布林聚合促进蛋白质的演变
1Institute of Molecular Life Sciences, HUN-REN Research Centre for Natural Sciences, 1117 Budapest, Hungary.
Biology
|December 30, 2025
概括
类似于图布林聚合促进蛋白 (TPPP) 的蛋白质在真核生物中表现出多样化的进化模式. 它们的分布挑战了以前的假设,表明与鞭毛体存在相关的复杂进化历史.
科学领域:
- 进化生物学 进化生物学
- 分子生物学分子生物学
- 基因组学就是基因组学.
背景情况:
- 类似于图布林聚合促进蛋白 (TPPP) 的蛋白质在各种生命形式中得到保护.
- TPPP家族成员的特点是p25alpha域的存在和数量.
- 以前的研究表明,TPPP类型在主要的真核超群中具有明显的族系分布.
研究的目的:
- 重新评估TPPP类蛋白质的基因组分布.
- 研究TPPPs在真核细胞群中的进化史和发生模式,特别是Opisthokonta.
- 探索TPPP发生与真核细胞鞭毛体存在之间的关系.
主要方法:
- 利用BLAST对蛋白质和核酸数据库进行搜索,以识别和分析TPPP序列.
- 专注于对Opisthokonta类的分析,同时也检查了更广泛的真核细胞关系.
- 与存在真核细胞鞭毛细胞相关的TPPP基因分布.
主要成果:
- TPPPs的基因组分布比以前理解的更复杂,除了已建立的模式 (例如,真菌外的真菌TPPPs).
- 证实了TPPP/基因发生与真核细胞鞭毛体存在之间的强烈联系.
- 确定了新的TPPP类型,包括一个具有两个p25alpha域的独特的Opisthokonta特异性TPPP,并在意想不到的系谱中发现了TPPP (例如,小,Heterolobosea).
结论:
- 由于新发现的分布模式,TPPPP类蛋白的进化历史需要重新评估.
- TPPPs与真核细胞鞭毛的关联为它们的功能进化提供了洞察力.
- 鉴定TPPPs在以前意想不到的群体中,需要对它们的古老起源和多样化的理解进行修订.
更多相关视频
相关概念视频
02:17Microtubule Instability
5.9K
Microtubules are hollow cylindrical filaments having a diameter of approximately 25 nm and a length that varies from 200 nm to 25 μm. GTP-bound tubulin subunits form αβ-heterodimers for microtubule assembly. These core building blocks interact longitudinally, polymerizing into protofilaments. The protofilaments then interact with one another through lateral bonding forces to form stable cylindrical microtubules. These cylindrical filaments are dynamic as they undergo repeated...
5.9K
01:23Microtubule Formation
7.3K
Microtubules are dynamic structures that undergo continuous assembly and disassembly. They originate from specialized multi-protein complexes known as microtubule organizing centers or MTOCs. Within the MTOC, the point of origin of the microtubule is known as the minus end, while the end radiating outward is the plus end. Microtubules serve two primary functions — the organization of spindle complexes to separate sister chromatids during mitotic or meiotic cell division and the formation...
7.3K
01:45Destabilization of Microtubules
3.4K
The destabilization of microtubules can occur during different stages of the microtubule lifecycle, such as nucleation or elongation. It can take place at either end of the microtubule or in the microtubule lattices as a whole. The lifespan of individual microtubules within a cell varies according to the cell type and stage of the cell cycle. During interphase, the lifespan of the microtubule is about 30 minutes, while during cell division, it is about 15 minutes. In axonal microtubules of...
3.4K
01:15Drugs that Stabilize Microtubules
2.6K
Microtubules are dynamic structures that undergo cycles of catastrophe and rescue. The microtubules play a central role in cell division by forming the spindle apparatus for segregating the chromosomes. This makes them ideal targets for regulating dividing cells in tumors and malignant cancer cells. Microtubule stabilizing drugs help stabilize the microtubule formation and promote its polymerization. Paclitaxel was the first microtubule stabilizing agent used as anticancer drug in chemotherapy...
2.6K
01:42Microtubule Associated Proteins (MAPs)
5.7K
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...
5.7K
01:32Microtubule Associated Motor Proteins
10.1K
Eukaryotic cells have different motor proteins for transporting various cargo within the cell. These motor proteins differ based on the filament they associate with, the direction they move within the cell, and the type of cargo they transport. Motor proteins that associate with microtubules are known as microtubule-associated motor proteins. There are two families of microtubule-associated motor proteins —Kinesins and Dyneins. Both these proteins assist in the transport of cellular...
10.1K