Date published: 2026-2-5

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AICAR transformylase Inhibitors

AICAR Transformylase inhibitors encompass a diverse group of chemicals that primarily target the bifunctional enzyme ATIC, involved in purine biosynthesis. These inhibitors function through various mechanisms, including competitive inhibition, feedback inhibition, substrate mimicry, and indirect pathway interference. For instance, Methotrexate and Pemetrexed act as competitive inhibitors, resembling the enzyme's substrates and thus preventing normal enzyme function. Conversely, AICAR (Acadesine) itself, at high concentrations, serves as a feedback inhibitor, demonstrating the enzyme's ability to be regulated by its own substrate or related compounds.

These inhibitors are not uniform in their structure or origin. Some, like Leflunomide and Azathioprine, are synthetic compounds, while others, such as 6-Mercaptopurine and Thioguanine, are purine analogues. The diversity in their chemical structures corresponds to the variety in their modes of inhibition. For example Sulfamethoxazole and Trimethoprim indirectly inhibit the enzyme by interfering with the folate metabolism, crucial for purine synthesis. This indirect inhibition underscores the interconnected nature of metabolic pathways and how targeting one can influence another.

SEE ALSO...

Product NameCAS #Catalog #QUANTITYPriceCitationsRATING

Methotrexate

59-05-2sc-3507
sc-3507A
100 mg
500 mg
$94.00
$213.00
33
(5)

Methotrexate is an inhibitor of dihydrofolate reductase (DHFR) Inhibition of DHFR leads to the inhibition of AICAR transformylase

Pemetrexed Disodium

150399-23-8sc-219564
10 mg
$136.00
5
(1)

Pemetrexed inhibits AICAR transformylase by mimicking the natural substrates of the enzyme, resulting in reduced purine synthesis.

Leflunomide

75706-12-6sc-202209
sc-202209A
10 mg
50 mg
$20.00
$83.00
5
(1)

Leflunomide metabolites inhibit AICAR transformylase, disrupting the enzyme's normal function in purine biosynthesis.

Sulfamethoxazole

723-46-6sc-208405
sc-208405A
sc-208405B
sc-208405C
10 g
25 g
50 g
100 g
$37.00
$55.00
$69.00
$109.00
5
(0)

Sulfamethoxazole indirectly inhibits AICAR transformylase by interfering with folate metabolism, which is crucial for purine synthesis.

Trimethoprim

738-70-5sc-203302
sc-203302A
sc-203302B
sc-203302C
sc-203302D
5 g
25 g
250 g
1 kg
5 kg
$67.00
$161.00
$255.00
$721.00
$3401.00
4
(1)

Trimethoprim, while primarily targeting bacterial enzymes, can indirectly affect AICAR transformylase through folate pathway interference.

β-Pyrazofurin Trifluoroacetic Acid Salt

30868-30-5 (free base)sc-476809
1 mg
$480.00
(0)

Pyrazofurin inhibits AICAR transformylase by mimicking nucleotides, thereby disrupting the purine biosynthesis pathway.

Azathioprine

446-86-6sc-210853D
sc-210853
sc-210853A
sc-210853B
sc-210853C
500 mg
1 g
2 g
5 g
10 g
$203.00
$176.00
$349.00
$505.00
$704.00
1
(1)

Azathioprine metabolites can inhibit AICAR transformylase, impacting purine nucleotide biosynthesis and accumulation.

6-Mercaptopurine

50-44-2sc-361087
sc-361087A
50 mg
100 mg
$72.00
$104.00
(0)

6-Mercaptopurine, a purine analogue, inhibits AICAR transformylase by incorporating into the purine biosynthesis pathway and causing feedback inhibition.

6-Thioguanine

154-42-7sc-205587
sc-205587A
250 mg
500 mg
$42.00
$54.00
3
(1)

Thioguanine acts similarly to 6-mercaptopurine, inhibiting AICAR transformylase and interfering with purine nucleotide biosynthesis.

Mizoribine

50924-49-7sc-359617
sc-359617A
10 mg
25 mg
$109.00
$228.00
(0)

MIZORIBINE inhibits AICAR transformylase by mimicking natural substrates of the enzyme, thereby affecting purine synthesis.