Journal
BIOCHIMICA ET BIOPHYSICA ACTA-PROTEINS AND PROTEOMICS
Volume 1794, Issue 7, Pages 1017-1029Publisher
ELSEVIER
DOI: 10.1016/j.bbapap.2009.04.002
Keywords
Hydrogen peroxide; Melanins; o-diphenols; Monophenols; Tyrosinase
Categories
Funding
- Ministerio de Educacion y Ciencia [BIO2006-15363, AP2005-4721]
- Fundacion Seneca [SAF2006-07040-C02-01]
- Consejeria de Educacion [00672/PI/04]
- FISCAM [PI-2007/53]
- Fundacion Caja Murcia
- [BIO-BMC 06/01-0004]
Ask authors/readers for more resources
The generation of H2O2 in the melanin biosynthesis pathway is of great importance because of its great cytotoxic capacity. However, there is controversy concerning the way in which H2O2 is generated in this pathway. In this work we demonstrate that it is generated in a series of chemical reactions coupled to the enzymatic formation of o-quinones by tyrosinase acting on monophenols and o-diphenols and during the auto-oxidation of the o-diphenols and other intermediates in the pathway. The use of the enzymes such as catalase, superoxide dismutase and peroxidase helps reveal the H2O2 generated. Based on the results obtained, we propose a scheme of enzymatic and non-enzymatic reactions that lead to the biosynthesis of melanins, which explains the formation of H2O2. (C) 2009 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available