proteinase

简明释义

英[ˈprəʊtiːneɪz]美[ˈprotiiˌnes]

n. [生化] 蛋白酶；朊酶

英英释义

单词用法

同义词

反义词

例句

1.Chymase is a kind of serine proteinase, mainly exists in secretory granules of mast cell and extracellular Interstitium.

糜酶是一类丝氨酸蛋白酶，主要存在于肥大细胞的分泌颗粒和细胞间质。

2.There are harmful effect on the stabilization of fresh beer foam as releasing proteinase A from yeast.

酵母中蛋白酶A的释放对纯生啤酒的泡持性有不良影响。

3.Some properties of proteinase in kiwifruit and its application to preparing meat tenderizer were investigated.

本文研究了中华猕猴桃蛋白酶的一些性质和它在配制肉类嫩化剂中的应用。

4.This paper summarizes the application of proteinase inhibitor in agriculture and clinic treatment.

为此，综述了蛋白酶抑制剂在农业和临床治疗上的应用。

5.Objective To evaluate the value of a recombinant Clonorchis sinensis cysteine proteinase for the serological diagnosis of clonorchiasis.

目的探讨重组华支睾吸虫半胱氨酸蛋白酶在华支睾吸虫病血清学诊断上的应用价值。

6.The ciliated columnar cells in the intestine show activity of proteinase, non specific esterase and alkaline phosphatase.

肠纤毛柱状细胞呈现蛋白酶、非特异性酯酶、酸性磷酸酶和碱性磷酸酶活性。

7.Objective: To clone cDNA of enamel matrix serine proteinase (EMSP1) encoding mature protein from mouse dental germs.

目的：克隆小鼠牙胚组织中釉基质丝氨酸蛋白酶(EMSP1)成熟肽编码区基因。

8.Researchers discovered that the proteinase is essential for cell signaling.

研究人员发现蛋白酶对细胞信号传递至关重要。

9.The study focused on how proteinase inhibitors can treat specific diseases.

这项研究集中在蛋白酶抑制剂如何治疗特定疾病上。

10.Inhibiting proteinase activity can lead to potential therapeutic applications.

抑制蛋白酶活性可能会导致潜在的治疗应用。

11.The enzyme proteinase plays a crucial role in breaking down proteins during digestion.

酶蛋白酶在消化过程中起着分解蛋白质的重要作用。

12.Certain viruses rely on their own proteinase to replicate within host cells.

某些病毒依赖自身的蛋白酶在宿主细胞内复制。

作文

Proteins are essential macromolecules that play a crucial role in the structure and function of living organisms. They are made up of amino acids and are involved in various biological processes, including catalysis, signaling, and structural support. One important group of enzymes that facilitate the breakdown of proteins is known as proteinase. A proteinase (蛋白酶) is an enzyme that catalyzes the hydrolysis of peptide bonds in proteins, leading to their degradation into smaller peptides or amino acids. This process is vital for many physiological functions, including digestion, cellular regulation, and protein recycling.The role of proteinases in the digestive system is particularly noteworthy. In humans and many other animals, dietary proteins must be broken down into smaller peptides and amino acids before they can be absorbed by the intestines. This task is primarily carried out by various proteinases, which are secreted by the stomach and pancreas. For example, pepsin, a prominent proteinase found in the stomach, initiates protein digestion by cleaving peptide bonds in the acidic environment of the stomach. Following this, pancreatic proteinases such as trypsin and chymotrypsin further digest the proteins in the small intestine, ensuring that nutrients are available for absorption.Beyond digestion, proteinases also play significant roles in cellular processes. They are involved in regulating various cellular functions, such as cell division, apoptosis, and immune responses. For instance, caspases are a family of proteinases that are essential for the process of programmed cell death, or apoptosis. By cleaving specific substrates, these enzymes help to dismantle cellular components in a controlled manner, preventing inflammation and damage to surrounding tissues.In addition to their physiological roles, proteinases have garnered attention in medical research and biotechnology. Abnormal proteinase activity has been implicated in several diseases, including cancer, neurodegenerative disorders, and inflammatory conditions. For example, certain types of cancer cells often exhibit increased levels of proteinases that facilitate tumor invasion and metastasis. Consequently, researchers are investigating proteinase inhibitors as potential therapeutic agents to combat these diseases. By inhibiting the activity of specific proteinases, it may be possible to slow down or halt the progression of cancer and other related disorders.Moreover, in the field of biotechnology, proteinases are utilized in various industrial applications. They are employed in the production of detergents, where they help break down protein stains, and in food processing, where they are used to tenderize meat and improve the texture of dairy products. The versatility of proteinases makes them valuable tools in both research and industry.In conclusion, proteinases are vital enzymes that facilitate the breakdown of proteins in various biological contexts. Their roles in digestion, cellular regulation, and disease pathology highlight their importance in health and disease. As research continues to uncover the intricacies of proteinase functions, we can expect to see advancements in therapeutic strategies and biotechnological applications that harness the power of these remarkable enzymes.

蛋白质是对生物体的结构和功能至关重要的大分子。它们由氨基酸组成，参与各种生物过程，包括催化、信号传递和结构支持。促进蛋白质分解的重要酶群体被称为蛋白酶。蛋白酶（proteinase）是一种催化蛋白质中肽键水解的酶，导致其降解为更小的肽或氨基酸。这一过程对于许多生理功能至关重要，包括消化、细胞调节和蛋白质回收。蛋白酶在消化系统中的作用尤其值得注意。在人类和许多其他动物中，饮食中的蛋白质必须被分解为更小的肽和氨基酸，才能被肠道吸收。这一任务主要由多种蛋白酶完成，它们由胃和胰腺分泌。例如，胃中发现的显著蛋白酶——胃蛋白酶（pepsin），通过在胃的酸性环境中切割肽键来启动蛋白质的消化。随后，胰腺中的蛋白酶如胰蛋白酶（trypsin）和糜蛋白酶（chymotrypsin）进一步消化小肠中的蛋白质，确保营养物质可以被吸收。除了消化之外，蛋白酶还在细胞过程中发挥重要作用。它们参与调节各种细胞功能，如细胞分裂、凋亡和免疫反应。例如，半胱氨酸蛋白酶（caspases）是一类蛋白酶，在程序性细胞死亡（凋亡）过程中至关重要。通过切割特定底物，这些酶帮助以受控方式拆解细胞成分，防止炎症和对周围组织的损伤。除了生理作用，蛋白酶在医学研究和生物技术中也引起了关注。异常的蛋白酶活性与多种疾病有关，包括癌症、神经退行性疾病和炎症性疾病。例如，某些类型的癌细胞通常表现出增加的蛋白酶水平，这促进肿瘤侵袭和转移。因此，研究人员正在调查蛋白酶抑制剂作为潜在的治疗药物，以对抗这些疾病。通过抑制特定蛋白酶的活性，可能有可能减缓或阻止癌症及其他相关疾病的进展。此外，在生物技术领域，蛋白酶被广泛应用于各种工业应用。它们被用于清洁剂的生产中，帮助分解蛋白污渍，以及在食品加工中，用于嫩化肉类和改善乳制品的质地。蛋白酶的多功能性使其成为研究和工业中宝贵的工具。总之，蛋白酶是促进各种生物背景下蛋白质分解的重要酶。它们在消化、细胞调节和疾病病理学中的作用突显了它们在健康和疾病中的重要性。随着研究继续揭示蛋白酶功能的复杂性，我们可以期待在治疗策略和生物技术应用方面取得进展，利用这些卓越酶的力量。