Tetrahydrobiopterin: Beyond its traditional role as a cofactor

T Eichwald, LB da Silva, AC Staats Pires, L Niero… - Antioxidants, 2023 - mdpi.com
Tetrahydrobiopterin (BH4) is an endogenous cofactor for some enzymatic conversions of
essential biomolecules, including nitric oxide, and monoamine neurotransmitters, and for the …

Genetic control of biosynthesis and transport of riboflavin and flavin nucleotides and construction of robust biotechnological producers

CA Abbas, AA Sibirny - Microbiology and molecular biology …, 2011 - Am Soc Microbiol
SUMMARY Riboflavin [7, 8-dimethyl-10-(1′-d-ribityl) isoalloxazine, vitamin B2] is an
obligatory component of human and animal diets, as it serves as the precursor of flavin …

The pathophysiological basis of dystonias

XO Breakefield, AJ Blood, Y Li, M Hallett… - Nature Reviews …, 2008 - nature.com
Dystonias comprise a group of movement disorders that are characterized by involuntary
movements and postures. Insight into the nature of neuronal dysfunction has been provided …

Mechanisms for the role of tetrahydrobiopterin in endothelial function and vascular disease

TS Schmidt, NJ Alp - Clinical science, 2007 - portlandpress.com
NO produced by eNOS (endothelial nitric oxide synthase) is a key mediator of vascular
homoeostasis. NO bioavailability is reduced early in vascular disease states, such as …

Biosynthesis of flavocoenzymes

M Fischer, A Bacher - Natural product reports, 2005 - pubs.rsc.org
The biosynthesis of one riboflavin molecule requires one molecule of GTP and two
molecules of ribulose 5-phosphate. The imidazole ring of GTP is hydrolytically opened …

The critical role of tetrahydrobiopterin (BH4) metabolism in modulating radiosensitivity: BH4/NOS axis as an angel or a devil

Y Feng, Y Feng, L Gu, P Liu, J Cao, S Zhang - Frontiers in Oncology, 2021 - frontiersin.org
Ionizing radiation and radioactive materials have been widely used in industry, medicine,
science and military. The efficacy of radiotherapy and adverse effects of normal tissues are …

Pet-1 switches transcriptional targets postnatally to regulate maturation of serotonin neuron excitability

SC Wyler, WC Spencer, NH Green… - Journal of …, 2016 - Soc Neuroscience
Newborn neurons enter an extended maturation stage, during which they acquire excitability
characteristics crucial for development of presynaptic and postsynaptic connectivity. In …

Tetrahydrobiopterin, superoxide, and vascular dysfunction

J Vásquez-Vivar - Free Radical Biology and Medicine, 2009 - Elsevier
(6R)-5, 6, 7, 8-Tetrahydrobiopterin (BH4) is an endogenously produced pterin that is found
widely distributed in mammalian tissues. BH4 works as a cofactor of aromatic amino acid …

Unusual arginine formations in protein function and assembly: rings, strings, and stacks

MAC Neves, M Yeager, R Abagyan - The journal of physical …, 2012 - ACS Publications
Protein–protein interfaces are often stabilized by a small number of dominant contacts,
exemplified by the overrepresentation of arginine residues at oligomerization interfaces …

Direct evidence for the adaptive role of copy number variation on antifolate susceptibility in Plasmodium falciparum

A Heinberg, E Siu, C Stern, EA Lawrence… - Molecular …, 2013 - Wiley Online Library
Resistance to antimalarials targeting the folate pathway is widespread. GTP‐cyclohydrolase
(gch1), the first enzyme in this pathway, exhibits extensive copy number variation (CN) in …