Related Experiment Video
Updated: Jan 25, 2026

09:50
Mapping Inhibitory Neuronal Circuits by Laser Scanning Photostimulation
Published on: October 6, 2011
17.7K
Thiosemicarbazones with tyrosinase inhibitory activity
Katarzyna Hałdys1, Rafał Latajka1
1Wrocław University of Science and Technology , Department of Bioorganic Chemistry , Wybrzeże Wyspiańskiego 27 , 50-370 , Wrocław , Poland .
Medchemcomm
|April 25, 2019
Summary
Thiosemicarbazones are potent inhibitors of tyrosinase, an enzyme crucial for melanin production. This review highlights their promise as agents for skin whitening and preventing food browning.
Area of Science:
- Biochemistry
- Enzymology
- Medicinal Chemistry
Background:
- Tyrosinase is a key enzyme in melanogenesis, responsible for melanin synthesis.
- Dysregulated melanin production leads to hyperpigmentation in skin and enzymatic browning in food.
- Tyrosinase inhibition is a significant target for cosmetic and food preservation applications.
Purpose of the Study:
- To review the activity of tyrosinase and its role in biological and food systems.
- To provide an overview of thiosemicarbazone derivatives as potent tyrosinase inhibitors.
- To analyze structure-activity relationships, inhibition kinetics, and mechanisms of action for these compounds.
Main Methods:
- Literature review and analysis of over 20 research articles.
- Comparison and summarization of studies on thiosemicarbazones as tyrosinase inhibitors.
- Evaluation of IC50 values, inhibition kinetics, and mechanisms.
Main Results:
- Synthetic thiosemicarbazone derivatives exhibit strong tyrosinase inhibitory properties (IC50 < 1 μM).
- These compounds represent some of the most potent tyrosinase inhibitors identified.
- Detailed structure-activity relationships and mechanisms of inhibition have been elucidated.
Conclusions:
- Thiosemicarbazones are a promising class of compounds for tyrosinase inhibition.
- Potential applications include development of skin-whitening cosmetic agents.
- These inhibitors also show potential as anti-browning agents in the food industry.
Related Concept Videos
Excitatory and Inhibitory Effects of Neurotransmitters
12.7K
When an action potential reaches the presynaptic axon terminal, it releases neurotransmitters from the neuron into the synaptic cleft at a chemical synapse. The released neurotransmitter can be excitatory or inhibitory. The critical criteria commonly used to determine whether a molecule is a neurotransmitter at a chemical synapse are the molecule's presence in the presynaptic neuron. Second, its release is in response to strong presynaptic depolarization. And lastly, the presence of...
12.7K
Co-activators and Co-repressors
8.4K
Gene transcription is regulated by the synergistic action of several proteins that form a complex at a gene regulatory site. This is observed in eukaryotes, where the regulation of gene expression is a complex process. Regulatory proteins in eukaryotes can broadly be classified into two types – regulators that bind directly to specific DNA sequences and co-regulators that associate with regulatory proteins but cannot directly bind to the DNA. These co-regulators are further divided into...
8.4K
tRNA Activation
22.7K
Aminoacyl-tRNA synthetases are present in both eukaryotes and bacteria. Though eukaryotes have 20 different aminoacyl-tRNA synthetases to couple to 20 amino acids, many bacteria do not have genes for all of these aminoacyl-tRNA synthetases. Despite this, they still use all 20 amino acids to synthesize their proteins. For instance, some bacteria do not have the gene encoding the enzyme that couples glutamine with its partner tRNA. In these organisms, one enzyme adds glutamic acid to all of the...
22.7K
tRNA Activation
8.4K
8.4K
Activation Energy
86.5K
Activation energy is the minimum amount of energy necessary for a chemical reaction to move forward. The higher the activation energy, the slower the rate of the reaction. However, adding heat to the reaction will increase the rate, since it causes molecules to move faster and increase the likelihood that molecules will collide. The collision and breaking of bonds represents the uphill phase of a reaction and generates the transition state. The transition state is an unstable high-energy state...
86.5K
Eukaryotic Transcription Activators
12.6K
Transcription activators are proteins that promote the transcription of genes from DNA to RNA. In most cases, these proteins contain two separate domains ‒ a domain that binds to DNA and a domain for activating transcription; however, in some cases, a single domain is responsible for both binding and activation of transcription, as seen in the glucocorticoid receptor and MyoD.
The binding domains are capable of recognizing and interacting with regulatory sequences on the DNA. These...
The binding domains are capable of recognizing and interacting with regulatory sequences on the DNA. These...
12.6K

