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Related Concept Videos

Protein Kinases and Phosphatases02:54

Protein Kinases and Phosphatases

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Proteins undergo chemical modifications that trigger changes in the charge, structure, and conformation of the proteins. Phosphorylation, acetylation, glycosylation, nitrosylation, ubiquitination, lipidation, methylation, and proteolysis are various protein modifications that regulate protein activity. Such modifications are usually enzyme-driven.
Protein kinases
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Phosphorylation01:02

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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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pH plays a critical role in maintaining normal cellular activities. It helps maintain the structure and function of various proteins, dictates the charge on cellular membranes, and is crucial for metabolic reactions inside the cell. Moreover, cells use the energy from the proton motive force to generate ATP.
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The phosphate buffer system is a critical biological mechanism for maintaining pH stability in the body. This system operates primarily through two components: sodium dihydrogen phosphate (NaH2PO4), which acts as a weak acid, and sodium hydrogen phosphate (Na2HPO4), which serves as a weak base.
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Roles of Electrolytes: Calcium and Phosphate01:27

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Calcium and phosphate are essential electrolytes in the human body, with calcium being the most abundant mineral. Around 99% of the body's calcium is stored in the skeleton and teeth, forming a crystal lattice of mineral salts in combination with phosphates. Calcium plays crucial roles in various bodily functions such as blood clotting, neurotransmitter release, muscle tone maintenance, and nervous and muscle tissue excitability.
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Alkaline Phosphatase.

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    Alkaline phosphatases, such as bacterial (BAP) and calf intestinal (CIP), are vital in molecular cloning. Novel enzymes from cold-blooded sources offer easier inactivation, improving dephosphorylation protocols.

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    Area of Science:

    • Molecular Biology
    • Enzymology

    Background:

    • Alkaline phosphatases are essential enzymes in molecular cloning.
    • Commonly used enzymes include bacterial alkaline phosphatase (BAP) and calf intestinal alkaline phosphatase (CIP).

    Purpose of the Study:

    • To introduce the uses and properties of various alkaline phosphatases.
    • To highlight novel alkaline phosphatases from cold-blooded organisms.

    Main Methods:

    • Review of existing literature on alkaline phosphatase enzymes.
    • Comparison of properties, including inactivation ease, of different alkaline phosphatases.

    Main Results:

    • Bacterial alkaline phosphatase (BAP) and calf intestinal alkaline phosphatase (CIP) are standard dephosphorylation enzymes.
    • Alkaline phosphatases from cold-blooded organisms, like shrimp alkaline phosphatase (SAP), offer advantages in easier heat inactivation.

    Conclusions:

    • Novel cold-blooded alkaline phosphatases provide an advantageous alternative to traditional enzymes for dephosphorylation in molecular cloning.
    • Understanding enzyme properties aids in optimizing molecular biology workflows.