cytokinins

6-Chloropurine riboside-5'-triphosphate serves as both an inhibitor and an activator in biochemical processes. It inhibits the RNA triphosphatase mRNA-capping enzyme subunit β (Cet1; IC50 = 2 µM for the GTPase activity of the S. cerevisiae enzyme), proving its efficacy against the enzyme responsible for the capping of mRNA molecules. Additionally, it acts as a phosphorylated derivative of 6-chloropurine riboside. This compound also activates the E. coli enzyme aspartate carbamoyltransferase (EC50 = 0.76 mM), demonstrating its versatility in modulating enzyme activities. It is instrumental in the synthesis of cytokinins with anticancer properties and a photoclickable form of ATP, highlighting its applications in biochemical synthesis and potential therapeutic uses.

trans-Zeatinriboside (Ribosylzeatin) is the most active and ubiquitous form of the naturally occurring cytokinins that promote cell division, stimulate shoot proliferation, inhibit root formation, slow the aging process, and activate gene expression and metabolic activity.

PI-55 (6-(2-hydroxy-3-methylbenzylamino)purine) is a cytokinin receptor inhibitor that exhibits structural similarity to 6-benzylaminopurine (BAP). It competitively inhibits BAP binding on the specific Arabidopsis receptors CRE1/AHK4 and AHK3. Furthermore, PI-55 effectively suppresses cytokinins-induced haustorium formation and enhances parasite aggressiveness [1].

trans-Zeatin ((E)-Zeatin) is the member of the plant growth hormone family known as cytokinins, which regulate cell division, development, and nutrient processing.

N6-Isopentenyladenosine, an end product of the mevalonate pathway, is an autophagy inhibitor with anti-melanoma activity. N6-Isopentenyladenosine, an RNA modification found in cytokinins, regulates plant growth/differentiation and improves the efficiency