PLP Inhibitors
The class of pyridoxal phosphate (PLP) inhibitors encompasses a diverse array of chemicals that directly or indirectly modulate the function of this essential cofactor within cellular pathways. Among the direct inhibitors, compounds such as aminooxyacetic acid, oxamic acid, 2-hydrazinopyridine, allyl sulfide, and 4'-methoxyacetophenone form covalent adducts with PLP, irreversibly modifying its active aldehyde group and disrupting its catalytic role in various enzymatic reactions. These direct inhibitors showcase the significance of specific chemical interactions in inhibiting PLP activity, providing targeted approaches to modulate cellular processes dependent on PLP.
On the other hand, indirect inhibitors like hydralazine, isoniazid, and hydrazine influence PLP activity through disruptions in cellular metabolic pathways. For instance, hydralazine and hydrazine impact the folate pathway, reducing the availability of active folate and indirectly influencing PLP levels. Isoniazid targets the vitamin B6 biosynthetic pathway, inhibiting PLP biosynthesis and reducing its cellular abundance. These indirect inhibitors showcase the interconnectedness of cellular metabolic pathways and for regulatory control over PLP function through modulating precursor availability. Understanding the diverse mechanisms employed by PLP inhibitors provides valuable insights into the regulation of this cofactor and its pivotal role in various cellular processes. The specific chemical interactions with PLP emphasize the importance of targeted approaches in modulating cofactor-dependent enzymes, contributing to a deeper understanding of cellular metabolism and its regulation by small molecules.
| Product Name | CAS # | Catalog # | QUANTITY | Price | Citations | RATING |
|---|---|---|---|---|---|---|
Hydralazine-15N4 Hydrochloride | 304-20-1 (unlabeled) | sc-490605 | 1 mg | $480.00 | ||
Hydralazine acts as an indirect inhibitor of PLP by influencing the folate pathway. It disrupts dihydrofolate reductase (DHFR), a key enzyme in folate metabolism, leading to reduced levels of the active form of folate. The decreased availability of folate impacts one-carbon metabolism, indirectly influencing PLP levels and function. | ||||||
Isoniazid | 54-85-3 | sc-205722 sc-205722A sc-205722B | 5 g 50 g 100 g | $26.00 $101.00 $146.00 | ||
Isoniazid serves as an indirect inhibitor of PLP by targeting the vitamin B6 biosynthetic pathway. By inhibiting the enzyme Pdx1, involved in the biosynthesis of pyridoxal phosphate (PLP), isoniazid reduces the cellular levels of PLP. The indirect inhibition occurs through disrupting the de novo synthesis of PLP, which is essential for the activation of various PLP-dependent enzymes. | ||||||
Oxamic acid | 471-47-6 | sc-250620 | 25 g | $148.00 | ||
Oxamic acid serves as a direct inhibitor of PLP by forming a covalent adduct with the cofactor. Through its ability to bind to the active aldehyde group of PLP, oxamic acid irreversibly modifies the cofactor, disrupting its role in various enzymatic reactions. The direct interaction with PLP impairs its catalytic function, influencing cellular processes dependent on PLP-dependent enzymes. | ||||||
2-Hydrazinopyridine | 4930-98-7 | sc-238066 | 1 g | $27.00 | ||
2-Hydrazinopyridine serves as a direct inhibitor of PLP by forming a covalent adduct with the cofactor. Through its hydrazine moiety, it reacts with the active aldehyde group of PLP, leading to irreversible modification and inhibition of PLP-dependent enzymes. The direct interaction with PLP disrupts its catalytic role in various cellular processes, impacting the activity of enzymes that rely on PLP for their function. | ||||||
S(−)-Carbidopa | 28860-95-9 | sc-200749 sc-200749A | 25 mg 100 mg | $96.00 $275.00 | 5 | |
Carbidopa acts as an indirect inhibitor of PLP by influencing the availability of its precursor, vitamin B6. By inhibiting aromatic L-amino acid decarboxylase (AADC), carbidopa reduces the conversion of L-DOPA to dopamine, limiting the demand for PLP in the downstream biosynthesis of neurotransmitters. The indirect inhibition occurs through the modulation of dopamine biosynthesis, impacting the utilization of PLP in neurotransmitter production. | ||||||
Diallyl sulfide | 592-88-1 | sc-204718 sc-204718A | 25 g 100 g | $42.00 $106.00 | 3 | |
Diallyl sulfide serves as a direct inhibitor of PLP by reacting with its active aldehyde group, forming a covalent adduct. This covalent modification disrupts the catalytic role of PLP in various enzymatic reactions, impacting cellular processes that rely on PLP-dependent enzymes. | ||||||
Penicillamine | 52-67-5 | sc-205795 sc-205795A | 1 g 5 g | $46.00 $96.00 | ||
Penicillamine acts as an indirect inhibitor of PLP by influencing cysteine metabolism. By chelating copper ions and forming stable complexes, penicillamine disrupts enzymes involved in cysteine biosynthesis, leading to reduced cysteine levels. | ||||||
4′-Methoxyacetophenone | 100-06-1 | sc-239006 | 5 g | $20.00 | ||
4'-Methoxyacetophenone serves as a direct inhibitor of PLP by forming a covalent adduct with the cofactor. Through its electrophilic ketone group, it reacts with the active aldehyde group of PLP, leading to irreversible modification and inhibition of PLP-dependent enzymes. The direct interaction with PLP disrupts its catalytic role in various cellular processes, impacting the activity of enzymes that rely on PLP for their function. | ||||||