Date published: 2026-4-24

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SPDSY Inhibitors

SPDSY Inhibitors can act through various mechanisms to inhibit SPDSY's role in polyamine biosynthesis. For instance, direct inhibitors like AdoDATO and APCHA bind to the enzyme's active site, competitively inhibiting its function. Compounds such as DFMO and SAM486A exert their inhibitory effect upstream, affecting substrate availability for SPDSY. For example, DFMO inhibits ornithine decarboxylase, thus reducing the availability of putrescine, which is the primary substrate for SPDSY. Conversely, SAM486A inhibits S-adenosylmethionine decarboxylase, which is responsible for producing dcAdoMet, the aminopropyl donor for SPDSY. Transcriptional and post-translational modulators like Berenil and N1, N11-Diethylnorspermine also contribute to SPDSY inhibition. Berenil acts by intercalating DNA and reducing SPDSY gene transcription, while N1, N11-Diethylnorspermine upregulates spermidine/spermine N1-acetyltransferase (SSAT), leading to increased acetylation and subsequent depletion of the SPDSY substrate. Other inhibitors like MGBG and Pentamidine work by affecting intracellular conditions such as ATP or adenosylhomocysteine levels, thus indirectly affecting SPDSY activity.
Product NameCAS #Catalog #QUANTITYPriceCitationsRATING

N-(3-Aminopropyl)cyclohexylamine

3312-60-5sc-202715
sc-202715D
sc-202715A
sc-202715B
sc-202715C
1 g
5 g
10 g
25 g
100 g
$37.00
$43.00
$52.00
$67.00
$213.00
3
(0)

N-(3-Aminopropyl)cyclohexylamine acts as a specialized SPDSY, characterized by its ability to engage in unique hydrogen bonding and steric interactions due to its cyclohexyl structure. This compound exhibits notable reactivity through its amine functional group, facilitating nucleophilic attacks in various chemical pathways. Its conformational flexibility enhances molecular interactions, allowing for tailored reactivity in diverse environments, influencing both kinetics and selectivity in reactions.

Difluoromethylornithine

70052-12-9sc-204723
sc-204723A
sc-204723B
sc-204723C
sc-204723D
sc-204723E
10 mg
25 mg
100 mg
250 mg
1 g
5 g
$59.00
$133.00
$161.00
$317.00
$983.00
$4821.00
2
(1)

Inhibits ornithine decarboxylase, the rate-limiting enzyme in polyamine biosynthesis, reducing SPDSY substrate availability.

Diminazene Aceturate

908-54-3sc-205651
sc-205651A
1 g
5 g
$92.00
$377.00
11
(1)

Intercalates DNA, reduces transcription of SPDSY, hence directly affecting the enzyme concentration in the cell.

N1,N11-Diethylnorspermine tetrahydrochloride

156886-85-0sc-204114
sc-204114A
sc-204114B
1 mg
5 mg
10 mg
$148.00
$611.00
$1219.00
6
(0)

Causes upregulation of spermidine/spermine N1-acetyltransferase (SSAT), increasing SPDSY substrate acetylation and depletion.

MDL 72527

93565-01-6sc-295375C
sc-295375B
sc-295375
sc-295375D
sc-295375A
1 mg
5 mg
10 mg
25 mg
50 mg
$45.00
$132.00
$201.00
$391.00
$750.00
(0)

Inhibits polyamine oxidase, affecting back-conversion of spermine to spermidine, thereby altering SPDSY substrate levels.

Pentamidine

100-33-4sc-208158
sc-208158A
25 mg
50 mg
$380.00
$568.00
(1)

Disrupts mitochondrial function leading to decreased ATP levels, which indirectly inhibits SPDSY by affecting substrate binding.

Cyclohexylamine

108-91-8sc-239615
25 ml
$21.00
(0)

Competitive inhibitor that directly binds to the SPDSY active site, preventing substrate binding.

Diethyl Pyrocarbonate

1609-47-8sc-202574B
sc-202574
sc-202574A
5 g
25 g
100 g
$61.00
$138.00
$478.00
1
(1)

Directly modifies His residues crucial for SPDSY activity, inhibiting its enzymatic function.