Publications

Export 35 results:
Sort by: Author [ Title  (Desc)] Type Year
A B [C] D E F G H I J K L M N O P Q R S T U V W X Y Z   [Show ALL]
U
Maiti, B. K., L. B. Maia, AJ Moro, J. C. Lima, C. M. Cordas, I. Moura, and JJG Moura. "Unusual Reduction Mechanism of Copper in Cysteine-Rich Environment." Inorganic Chemistry. 57.14 (2018): 8078-8088. AbstractWebsite
n/a
T
Samhan-Arias, A. K., R. M. Almeida, S. Ramos, C. M. Cordas, I. Moura, C. Gutierrez-Merino, and JJG Moura. "Topography of human cytochrome b5/cytochrome b5 reductase interacting domain and redox alterations upon complex formation." Biochimica et Biophysica Acta - Bioenergetics. 1859.2 (2018): 78-87. AbstractWebsite
n/a
Teixeira, L. R., J. M. Dantas, C. A. Salgueiro, and C. M. Cordas. "Thermodynamic and kinetic properties of the outer membrane cytochrome OmcF, a key protein for extracellular electron transfer in Geobacter sulfurreducens." Biochimica et Biophysica Acta - Bioenergetics. 1859.10 (2018): 1132-1137. AbstractWebsite
n/a
Santos, T. C., A. R. De Oliveira, J. M. Dantas, C. A. Salgueiro, and C. M. Cordas. "Thermodynamic and kinetic characterization of PccH, a key protein in microbial electrosynthesis processes in Geobacter sulfurreducens." Biochimica et Biophysica Acta - Bioenergetics. 1847.10 (2015): 1113-1118. AbstractWebsite
n/a
S
Duarte, A. G., C. M. Cordas, JJG Moura, and I. Moura. "Steady-state kinetics with nitric oxide reductase (NOR): New considerations on substrate inhibition profile and catalytic mechanism." Biochimica et Biophysica Acta - Bioenergetics. 1837.3 (2014): 375-384. AbstractWebsite
n/a
Cordas, C. M., A. S. Viana, S. Leupold, F. P. Montforts, and L. M. Abrantes. "Self-assembled monolayer of an iron(III) porphyrin disulphide derivative on gold." Electrochemistry Communications. 5.1 (2003): 36-41. AbstractWebsite

A novel iron(III) porphyrin disulphide derivative have been successfully immobilised on gold surfaces by self-assembly. The redox response of the modified electrodes was compared with the obtained for a similar iron porphyrin in solution, confirming the immobilisation of the metalloporphyrin. The gravimetric data obtained by electrochemical quartz crystal microbalance (EQCM) during adsorption allowed an estimation of the electrode coverage, providing further evidence for the formation of the porphyrin SAM. The modified electrodes were also measured by conventional and imaging ellipsometry. The electrocatalytic activity of the two modified electrodes was tested for the reduction of the molecular oxygen. (C) 2002 Elsevier Science B.V. All rights reserved.

Nunes, M. J., C. M. Cordas, JJG Moura, J. P. Noronha, and L. C. Branco. "Screening of Potential Stress Biomarkers in Sweat Associated with Sports Training." Sports Medicine - Open. 7.1 (2021). AbstractWebsite
n/a
Carvalho, R. N. L., R. M. Almeida, JJG Moura, N. T. Lourenço, L. J. P. Fonseca, and C. M. Cordas. "Sandwich-Type Enzymatic Fuel Cell Based on a New Electro-Conductive Material - Ion Jelly." ChemistrySelect. 1.20 (2016): 6546-6552. AbstractWebsite
n/a
P
Samhan-Arias, A. K., L. B. Maia, C. M. Cordas, I. Moura, C. Gutierrez-Merino, and JJG Moura. "Peroxidase-like activity of cytochrome b5 is triggered upon hemichrome formation in alkaline pH." Biochimica et Biophysica Acta - Proteins and Proteomics. 1866.2 (2018): 373-378. AbstractWebsite
n/a
O
Auchere, F., R. Sikkink, C. Cordas, P. Raleiras, P. Tavares, I. Moura, and JJG Moura. "Overexpression and purification of Treponema pallidum rubredoxin; kinetic evidence for a superoxide-mediated electron transfer with the superoxide reductase neelaredoxin." Journal of Biological Inorganic Chemistry. 9.7 (2004): 839-849. Abstract
n/a
N
Cordas, C. M., AS Pereira, C. E. Martins, C. G. Timoteo, I. Moura, JJG Moura, and P. Tavares. "Nitric oxide reductase: Direct electrochemistry and electrocatalytic activity." Chembiochem. 7.12 (2006): 1878-1881. AbstractWebsite
n/a
Gomes, F. O., L. B. Maia, C. Cordas, C. Delerue-Matos, I. Moura, JJG Moura, and S. Morais. "Nitric Oxide Detection Using Electrochemical Third-generation Biosensors – Based on Heme Proteins and Porphyrins." Electroanalysis. 30.11 (2018): 2485-2503. AbstractWebsite
n/a
Folgosa, F., C. M. Cordas, J. A. Santos, AS Pereira, JJG Moura, P. Tavares, and I. Moura. "New spectroscopic and electrochemical insights on a class I superoxide reductase: evidence for an intramolecular electron-transfer pathway." Biochemical Journal. 438 (2011): 485-494. AbstractWebsite

SORs (superoxide reductases) are enzymes involved in bacterial resistance to reactive oxygen species, catalysing the reduction of superoxide anions to hydrogen peroxide. So far three structural classes have been identified. Class I enzymes have two ironcentre-containing domains. Most studies have focused on the catalytic iron site (centre II), yet the role of centre I is poorly understood. The possible roles of this iron site were approached by an integrated study using both classical and fast kinetic measurements, as well as direct electrochemistry. A new heterometallic form of the protein with a zinc-substituted centre I, maintaining the iron active-site centre II, was obtained, resulting in a stable derivative useful for comparison with the native all-iron from. Second-order rate constants for the electron transfer between reduced rubredoxin and the different SOR forms were determined to be 2.8 x 10(7) M(-1) . s(-1) and 1.3 x 10(6) M(-1) . s(-1) for SOR(Fe(IIII)-Fe(II)) and for SOR(Fe(IIII)-Fe(III)) forms respectively, and 3.2 x 10(6) M(-1) s(-1) for the SOR(Zn(II)-Fe(III)) form. The results obtained seem to indicate that centre I transfers electrons from the putative physiological donor rubredoxin to the catalytic active iron site (intramolecular process). In addition, electrochemical results show that conformational changes are associated with the redox state of centre I, which may enable a faster catalytic response towards superoxide anion. The apparent rate constants calculated for the SOR-mediated electron transfer also support this observation.

Cordas, C. M., N. M. T. Lourenco, P. Vidinha, CAM Afonso, S. Barreiros, L. P. Fonseca, and J. M. S. Cabral. "New conducting biomaterial based on Ion Jelly (R) technology for development of a new generation of biosensors." New Biotechnology. 25 (2009): S138-S139. AbstractWebsite
n/a
M
Cordas, C. M., and JJG Moura. "Molybdenum and tungsten enzymes redox properties – A brief overview." Coordination Chemistry Reviews. 394 (2019): 53-64. AbstractWebsite
n/a
Teixeira, L. R., C. M. Cordas, M. P. Fonseca, N. E. C. Duke, P. R. Pokkuluri, and C. A. Salgueiro. "Modulation of the Redox Potential and Electron/Proton Transfer Mechanisms in the Outer Membrane Cytochrome OmcF From Geobacter sulfurreducens." Frontiers in Microbiology. 10 (2020). AbstractWebsite
n/a
L
Samhan-Arias, A. K., C. M. Cordas, M. S. Carepo, L. B. Maia, C. Gutierrez-Merino, I. Moura, and JJG Moura. "Ligand accessibility to heme cytochrome b 5 coordinating sphere and enzymatic activity enhancement upon tyrosine ionization." Journal of Biological Inorganic Chemistry. 24.3 (2019): 317-330. AbstractWebsite
n/a
I
Ramos, S., R. M. Almeida, C. M. Cordas, JJG Moura, S. R. Pauleta, and I. Moura. "Insights into the recognition and electron transfer steps in nitric oxide reductase from Marinobacter hydrocarbonoclasticus." Journal of Inorganic Biochemistry. 177 (2017): 402-411. AbstractWebsite
n/a
Dall'Agnol, L. T., C. M. Cordas, and JJG Moura. "Influence of respiratory substrate in carbon steel corrosion by a Sulphate Reducing Prokaryote model organism." Bioelectrochemistry. 97 (2014): 43-51. AbstractWebsite
n/a
Ramanaiah, S. V., C. M. Cordas, S. Matias, and L. P. Fonseca. "In situ electrochemical characterization of a microbial fuel cell biocathode running on wastewater." Catalysts. 11.7 (2021). AbstractWebsite
n/a
Rosa, V., A. P. S. Gaspari, F. Folgosa, C. M. Cordas, P. Tavares, T. Santos-Silva, S. Barroso, and T. Avilés. "Imine ligands based on ferrocene: Synthesis, structural and Mössbauer characterization and evaluation as chromogenic and electrochemical sensors for Hg2+." New Journal of Chemistry. 42.5 (2018): 3334-3343. AbstractWebsite
n/a
E
Cordas, C. M., A. Tenreiro, and L. M. Abrantes EQCM study on the polytyramine modified electrodes for the preparation of biosensors. Eds. Y. G. Gogotsi, and I. V. Uvarova. Vol. 102. Nanostructured Materials and Coatings for Biomedical and Sensor Applications, 102., 2003. AbstractWebsite
n/a
Abrantes, L. M., C. M. Cordas, and E. Vieil. "EQCM study of polypyrrole modified electrodes doped with Keggin-type heteropolyanion for cation detection." Electrochimica Acta. 47.9 (2002): 1481-1487. AbstractWebsite

The incorporation of a Keggin-type heteropolyanion, the phosphotungstate ([PW12O40](3-)), into polypyrrole has been achieved during the electrochemical preparation of the polymer films in aqueous solution. The redox behaviour of these modified electrodes is described by using cyclic voltammetry (CV) and electrochemical quartz crystal microbalance (EQCM). The data allowed to estimate the doping level that indicates the extent of the heteropolyanion insertion. It is found that the polymer films, in aqueous solution, exhibit sensibility to cations, namely to Na+. (C) 2002 Elsevier Science Ltd. All rights reserved.

Cordas, C. M., J. Wilton, T. Cardoso, F. Folgosa, AS Pereira, and P. Tavares. "Electrochemical behaviour of Dps-a mini-ferritin." European Biophysics Journal with Biophysics Letters. 40 (2011): 181. AbstractWebsite
n/a
Cordas, Cristina M., Americo G. Duarte, Jose J. G. Moura, and Isabel Moura. "Electrochemical behaviour of bacterial nitric oxide reductase-Evidence of low redox potential non-heme Fe-B gives new perspectives on the catalytic mechanism." Biochimica Et Biophysica Acta-Bioenergetics. 1827.3 (2013): 233-238. Abstract
n/a