Substrate Protein
Substrate Protein - Related Videos
08:36
Creating Two-Dimensional Patterned Substrates for Protein and Cell Confinement
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Cited by 5 •
2011
Self-assembled monolayers (SAMs) formed from long chain alkane thiols on gold provide well-defined substrates for the formation of protein patterns and cell confinement. Microcontact printing of hexadecanethiol using a polydimethylsiloxane (PDMS) stamp followed by backfilling with a glycol-terminated alkane thiol monomer produces a pattern where protein and cells adsorb only to the stamped hexadecanethiol region.
14:32
Deacetylation Assays to Unravel the Interplay between Sirtuins (SIRT2) and Specific Protein-substrates
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Cited by 1 •
2016
This protocol describes the required steps to execute in vitro and in vivo deacetylation assays in order to establish the role of proteins as specific deacetylation substrates for sirtuins and further study the role of reversible - lysine acetylation as a post-translational modification.
06:00
SUMOylation Assay: An In Vitro Technique to Detect the SUMOylation Status of Substrate Proteins by Immunoblotting
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2025
This video demonstrates the in vitro method for SUMOylation of substrate proteins using a sequential enzyme cascade. Further, the SUMOylated status of the protein is identified using the electrophoresis and immunoblotting technique.
11:13
Identification of Kinase-substrate Pairs Using High Throughput Screening
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Cited by 1 •
2015
Protein phosphorylation is a central feature of how cells interpret and respond to information in their extracellular milieu. Here, we present a high throughput screening protocol using kinases purified from mammalian cells to rapidly identify kinases that phosphorylate a substrate(s) of interest.
08:53
Biochemical and Structural Characterization of the Carbohydrate Transport Substrate-binding-protein SP0092
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2017
A streamlined protocol for performing an extensive biochemical and structural characterization of a carbohydrate substrate binding protein from Streptococcus pneumoniae is presented.
FAQs
Specific amino acid residues or structural features recognized by an enzyme help determine which part of the molecule enters the active site. This recognition creates a precise interaction rather than a general protein contact, allowing the enzyme to align a target bond or side chain for catalysis. Selectivity helps explain why particular substrate proteins participate in defined cellular reactions.
Positioning matters because catalysis requires the target bond or side chain to be placed at the enzyme’s active site. Recognition of a suitable residue or structural feature therefore links molecular binding to chemical change. Depending on the reaction, the enzyme can cleave a bond or add a covalent modification, connecting precise molecular events with cellular regulation.
Cleavage, phosphorylation, and acetylation represent distinct types of chemical change that an enzyme can impose on a substrate protein. Because these reactions act on a target bond or side chain, their consequences can differ while remaining tied to the same recognition principle. The resulting modifications help regulate signaling, degradation, gene regulation, or cell-cycle progression.
Their modification places enzyme activity within larger cellular processes. In signal transduction, gene regulation, protein degradation, and cell-cycle progression, identifying the relevant substrate protein can connect a chemical reaction to a broader regulatory outcome. This perspective helps researchers interpret enzyme activity as part of coordinated cellular control rather than as an isolated molecular event.
Researchers can examine which amino acid residues or structural features an enzyme recognizes, which active-site interaction positions the target bond or side chain, and what chemical change follows. Linking those observations to the affected cellular process helps distinguish the enzyme’s molecular action from its broader role in signaling, metabolism, degradation, gene regulation, or cell-cycle control.
Mapping an enzyme to the substrate protein it modifies reveals the molecular target of its activity. Researchers can then relate that target to signal transduction, metabolism, protein degradation, gene regulation, or cell-cycle progression. This links enzyme chemistry with cellular function and helps clarify which biological processes depend on that enzyme-substrate relationship.
Changes affecting an enzyme’s recognized substrate protein, its target residues, or the resulting modification can be examined in relation to disrupted cellular regulation. Because these proteins participate in signaling, metabolism, degradation, gene regulation, and cell-cycle progression, their enzyme relationships provide a way to connect molecular reactions with disease-related biological mechanisms.
Knowing which substrate protein and molecular feature an enzyme recognizes provides a basis for distinguishing its specific cellular action from unrelated reactions. Researchers can use that relationship to understand enzyme selectivity and guide strategies aimed at selectively influencing the relevant pathway. Such information is especially valuable when enzyme activity is linked to disease mechanisms.