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Upstream product

• 39538-11-9 N,O-bis(trimethylsilyl)-4-aminobutyric acid 
• 19741-14-1 4-[(2,4-diaminopteridin-6-ylmethyl)methylamino]benzoic acid 
• 56-12-2 4-amino-n-butyric acid 

Relevant academic research and scientific papers

Methotrexates semi-antigen and complete antigen and its preparation method and application (by machine translation)

The invention discloses methotrexates semi-antigen derivatives and the corresponding complete antigen and its in the methotrexate antibody preparation and EPR in the application. The methotrexate semi-antigen structure and is shown as 2 shown, while the c

A mechanism for the addition of multiple moles of glutamate by folylpolyglutamate synthetase

The role of the α-carboxyl group in methotrexate (MeAPA-Glu) and the γ-glutamate derivative of methotrexate (MeAPA-Glu-Glu) in the reaction catalyzed by folylpolyglutamate synthetase (FPGS) has been investigated. MeAPA-Glu and MeAPA-Glu-Glu were accepted as substrates by the same FPGS species contained in an (NH4)2SO4 precipitate of mouse liver protein, as judged by a lack of additivity of product formation at saturating concentrations of both substrates. MeAPA-Gaba, the MeAPA-Glu analogue lacking an α-carboxyl, was inactive as a substrate for this enzyme as was MeAPA-Glu-Gaba, the analogue of MeAPA-Glu-Glu that lacked the α-carboxyl of the terminal glutamic acid. However, MeAPA-Gaba-Glu, the analogue of MeAPA-Glu-Glu without an α-carboxyl on the first glutamic acid, had activity as a substrate for FPGS that approached that of MeAPA-Glu-Glu. These results suggest that the α-carboxyl is essential for the binding of folyl monoglutamates to FPGS in the correct orientation to allow catalysis. Moreover, the binding of the terminal α-carboxyl of folyl oligoglutamates to the same residue(s) responsible for the binding of the α-carboxyl of folyl monoglutamates would allow correct positioning of the terminal γ-carboxyl of the chain for reaction. This binding mechanism would be compatible with the utilization of a single enzyme species for the addition of glutamate to the monoglutamate or oligoglutamate forms of folates and folate analogues.