Amino Peptidase Degradation
Amino Peptidase Degradation - Related Videos
02:11
Proteins: From Genes to Degradation
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2020
Within a biological system, the DNA encodes the RNA, and the nucleotide sequence in the RNA further defines the amino acid sequence in the protein. This is referred to as “The Central Dogma of Molecular Biology” - a term coined by Francis Crick. Central dogma is a firm principle in biology that defines the flow of genetic information within any life form. The two fundamental steps in central dogma are - transcription and translation. Transcription is the synthesis of RNA molecules by RNA...
01:23
Dipeptidyl Peptidase 4 Inhibitors
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2024
Dipeptidyl peptidase 4 (DPP-4) is a serine protease widely distributed in the body. It's involved in the inactivation of GLP-1 and GIP hormones, which are crucial for insulin regulation. DPP-4 inhibitors, such as sitagliptin (Januvia), saxagliptin (Onglyza), linagliptin (Tradjenta), alogliptin (Nesina), and vildagliptin (Galvus), help increase the proportion of active GLP-1, enhancing insulin secretion. These inhibitors work by competitively binding to DPP-4. This binding causes a significant...
04:04
Radiolabeled Amino Acid Uptake Assay to Quantify Cellular Uptake of Amino Acids
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2025
This video demonstrates an in vitro technique for estimating amino acid uptake by bone marrow-derived stromal cells. Na+-dependent amino acid transporters mediate the uptake of radiolabeled amino acids inside the cells, and the cellular uptake is estimated by measuring the radioactivity.
02:58
Regulated Protein Degradation
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2020
It is vital to regulate the activity of enzymatic as well as non-enzymatic proteins inside the cell. This can be achieved either through creating a balance between their rate of synthesis and degradation or regulating the intrinsic activity of the protein. Both these regulation mechanisms play an essential role in the normal functioning of cells. Protein degradation plays two important roles in the cells. It helps to protect cells from misfolded or damaged proteins before they lead to a...
03:49
Amino acids
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2026
Amino acids are the monomers that comprise proteins. Each amino acid has the same fundamental structure, which consists of a central carbon atom, or the alpha (α) carbon, bonded to an amino group (NH2), a carboxyl group (COOH), and to a hydrogen atom. Every amino acid also has another atom or group of atoms bonded to the central atom known as the R group. There are 20 common amino acids present in proteins, each with a different R group. Variation in the amino acid sequence is responsible for...
FAQs
Substrate recognition depends on binding the peptide so its N-terminal residue fits a chemically suitable active-site environment. This positioning determines which peptide bond lies next to the catalytic machinery and therefore which residue is removed first. Differences in substrate structure can influence enzyme selectivity, allowing researchers to relate molecular features to the observed degradation pattern.
Catalytic residues help organize and activate the reacting groups, while a metal-ion cofactor in many aminopeptidases helps activate water for peptide-bond hydrolysis. Together, these components connect active-site structure with reaction chemistry. Their arrangement explains how the enzyme promotes controlled cleavage under conditions that preserve selectivity for the terminal region of a substrate.
The N-terminal direction gives the reaction a defined order: the accessible terminal residue is positioned for cleavage before residues farther inside the chain. That directional selectivity provides structural information rather than simply indicating that a peptide bond has broken. In chemical analysis, the resulting pattern can help distinguish substrates according to their terminal sequence features.
A supported workflow begins by bringing an aminopeptidase and a peptide or protein substrate together, allowing binding to position the terminal residue, and then examining the products of hydrolysis. Researchers can compare which amino acids are removed and how efficiently different substrates react. Such observations connect molecular structure, active-site recognition, and controlled chemical transformation.
Because cleavage proceeds from a peptide's N-terminal end, monitoring the amino acids removed during the reaction can provide information about terminal sequence organization. Researchers can use the enzyme's selectivity to characterize how a substrate is arranged and to distinguish related peptide structures. This makes the reaction a biochemical analysis tool as well as a hydrolysis process.
In protein turnover studies, aminopeptidase activity helps investigators examine how peptide and protein materials are progressively processed. Its defined substrate recognition also supports inhibitor design and the development of chemical tools that interfere with enzymatic cleavage. Comparing activity across substrates or in the presence of candidate inhibitors can reveal relationships between active-site chemistry and enzyme function.