Date published: 2026-4-24

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GCH-I Activators

The class of GCH-I activators encompasses a variety of compounds that can directly or indirectly modulate the activity of GCH-I, a key enzyme in the biosynthesis of tetrahydrobiopterin (BH4). BH4 is a critical cofactor for various enzymes, including nitric oxide synthase (NOS), and plays a pivotal role in neurotransmitter synthesis and redox regulation. Understanding the modulation of GCH-I activity is of significant interest due to its implications in diverse physiological processes. Folinic Acid, also known as Leucovorin, represents an activator that supports BH4 biosynthesis by serving as a substrate for dihydrofolate reductase (DHFR), a downstream enzyme in the BH4 biosynthetic pathway. This highlights the intricate interplay between folate metabolism and BH4 production. Ad ditionally, Selenium, an essential trace element, indirectly influences GCH-I by modulating cellular oxidative stress. Selenium-containing compounds, such as selenocysteine, can impact cellular redox status, influencing the activity of GCH-I and BH4 biosynthesis. L-Arginine, a precursor for nitric oxide (NO) synthesis, indirectly supports GCH-I activity by providing substrate for nitric oxide synthase (NOS), promoting BH4-dependent NO production.

Coenzyme Q10 (Ubiquinone), a crucial component in mitochondrial electron transport, contributes to cellular respiration and redox balance. Its antioxidant properties may indirectly influence GCH-I activity, highlighting the importance of mitochondrial function in BH4 biosynthesis. BH2 analogues, including sepiapterin and sapropterin, mimic the structure of BH2, a precursor in the BH4 biosynthetic pathway, directly activating GCH-I by providing a substrate-like structure. Nitric oxide donors, such as sodium nitroprusside and nitroglycerin, release NO in a controlled manner, indirectly modulating GCH-I activity by feedback mechanisms and promoting BH4-dependent NO synthesis. Lastly, Zinc, an essential trace metal, may indirectly impact GCH-I by influencing cellular redox status and metal-dependent enzymatic activities. Zinc-containing compounds, such as zinc sulfate, can modulate the cellular environment, affecting GCH-I activity and BH4 biosynthesis.

SEE ALSO...

Product NameCAS #Catalog #QUANTITYPriceCitationsRATING

Folinic acid calcium salt

1492-18-8sc-252837
sc-252837A
100 mg
500 mg
$94.00
$375.00
3
(1)

Folinic Acid, also known as Leucovorin, serves as a substrate for dihydrofolate reductase (DHFR), a downstream enzyme in the BH4 biosynthetic pathway. By providing an alternative source of reduced folates, Folinic Acid can enhance BH4 production by supporting DHFR activity.

Selenium

7782-49-2sc-250973
50 g
$62.00
1
(1)

Selenium is an essential trace element known for its role in redox homeostasis. It indirectly influences GCH-I by modulating cellular oxidative stress. Selenium-containing compounds, such as selenocysteine, can affect cellular redox status, potentially influencing the activity of GCH-I and BH4 biosynthesis.

L-Arginine

74-79-3sc-391657B
sc-391657
sc-391657A
sc-391657C
sc-391657D
5 g
25 g
100 g
500 g
1 kg
$20.00
$31.00
$61.00
$219.00
$352.00
2
(0)

L-Arginine is a precursor for nitric oxide (NO) synthesis, a process dependent on BH4 as a cofactor. By providing substrate for nitric oxide synthase (NOS), L-Arginine indirectly supports GCH-I activity, promoting BH4-dependent NO production.

NADPH tetrasodium salt

2646-71-1sc-202725
sc-202725A
sc-202725B
sc-202725C
25 mg
50 mg
250 mg
1 g
$47.00
$84.00
$286.00
$754.00
11
(1)

Nicotinamide adenine dinucleotide phosphate (NADPH) is a cofactor involved in redox reactions. By supplying reducing equivalents, NADPH indirectly influences GCH-I activity and BH4 biosynthesis, as GCH-I relies on proper redox balance for optimal function.

Resveratrol

501-36-0sc-200808
sc-200808A
sc-200808B
100 mg
500 mg
5 g
$80.00
$220.00
$460.00
64
(2)

Resveratrol, a polyphenol found in red wine, exhibits antioxidant properties and can modulate various cellular pathways. It may indirectly impact GCH-I by influencing redox signaling and cellular stress responses, potentially affecting BH4 biosynthesis.

Coenzyme Q10

303-98-0sc-205262
sc-205262A
1 g
5 g
$71.00
$184.00
1
(1)

Coenzyme Q10, also known as Ubiquinone, plays a crucial role in mitochondrial electron transport and cellular respiration. Its antioxidant properties may indirectly influence GCH-I activity by maintaining cellular redox balance, which is essential for optimal BH4 biosynthesis.

Tetrahydrofolic acid

sc-215955
sc-215955A
sc-215955B
25 mg
100 mg
1 g
$105.00
$285.00
$1005.00
(1)

Tetrahydrofolic acid, a reduced form of folate, serves as a crucial cofactor in one-carbon metabolism. By participating in redox reactions, THF indirectly influences GCH-I activity and BH4 biosynthesis. THF can potentially enhance BH4 production by supporting the overall redox balance in the cellular environment.

Zinc

7440-66-6sc-213177
100 g
$48.00
(0)

Zinc is an essential trace metal with diverse cellular functions. It may indirectly impact GCH-I by influencing cellular redox status and metal-dependent enzymatic activities. Zinc-containing compounds, such as zinc sulfate, can modulate the cellular environment, potentially affecting GCH-I activity and BH4 biosynthesis.