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17 Publications

Antunes J, Levée T, Ihalainen P

[2019] Application of Enzymatically Treated Lignin Oligomers as Lignopolyols For A Full Replacement of Commercial Polyols in Polyurethane Foam Formulation
Biomed J Sci & Tech Res, 24: 17898-17904
Lignin has shown to have a great potential in replacing oil in many applications, including resins, polyols, polymers, coatings, and composites. The current case study describes the application of the selected lignin oligomeric fraction produced by a novel enzymatic lignin [...]

de Salas F, Aza P, Gilabert JF, Santiago G, Kılıç S, Sener ME, Vind J, Guallar V, Martínez AT, Camarero S

[2019] Engineering of a fungal laccase to develop a robust, versatile and highly-expressed biocatalyst for sustainable chemistry
Green Chemistry, 10.1039/c9gc02475a
Fungal laccases can play an important role as biocatalysts in organic chemistry to replace chemical synthesis. In a previous work we synthesized conductive polyaniline using a high-redox potential laccase from our collection of recombinant fungal variants. Still, the oxidation [...]

de Salas F, Cañadas R, Santiago G, Virseda-Jerez A, Vind J, Gentili P, Martínez AT, Guallar V, Muñoz IG, Camarero S

[2019] Structural and biochemical insights into an engineered high-redox potential laccase overproduced in Aspergillus
Int. J. Biol. Macromol., 10.1016/j.ijbiomac.2019.09.052
Fungal laccases have great potential as biocatalysts oxidizing a variety of aromatic compounds using oxygen as co-substrate. Here, the crystal structure of 7D5 laccase (PDB 6H5Y), developed in Saccharomyces cerevisiae and overproduced in Aspergillus oryzae, is compared with [...]

Pardo I, Rodríguez-Escribano D, Aza P, de Salas F, Martínez AT, Camarero S

[2018] A highly stable laccase obtained by swapping the second cupredoxin domain
Scientific Reports, 8: 15669
The robustness of a high-redox potential laccase has been enhanced by swapping its second cupredoxin domain with that from another fungal laccase, which introduced a pool of neutral mutations in the protein sequence without affecting enzyme functionality. The new laccase [...]

Ayuso-Fernández I, Ruiz-Dueñas FJ, Martínez AT

[2018] Evolutionary convergence in lignin-degrading enzymes
Proc. Natl. Acad. Sci. USA, 115: 6428-6433
We analyze the molecular mechanisms that led to the rise of a powerful strategy for lignin degradation (i.e., the formation of a solvent-exposed tryptophanyl radical capable of oxidizing the bulky lignin polymer) as a convergent trait in different species of fungi (order [...]

Martínez AT, Camarero S, Ruiz-Dueñas FJ, Martínez MJ

[2018] Biological Lignin Degradation
Lignin Valorization: Emerging Approaches. Ed. Gregg Beckham. RSC: 199-225
In nature, white-rot fungi and some bacteria secrete powerful oxidative enzymes such as peroxidases and laccases to break down lignin and lignin products. These enzymes, together with different chemical mediators, form a chemo-enzymatic system for delignifying biomass so [...]

Serrano L, Esakkimuthu SE, Marlin N, Brochier-Salon MC, Mortha G, Bertaud F

[2018] Fast, Easy, and Economical Quantification of Lignin Phenolic Hydroxyl Groups: Comparison with Classical Techniques
Energy&Fuels, 32: 5969-5977
The quantification of lignin functional groups constitutes an essential step for effective assessment of lignin transformation. A new, fast, economical, and simple method without the use of harmful solvents is presented for lignin phenolic hydroxyl group quantification. [...]

Hämaläinen V, Grönroos T, Suonpää A, Heikkilä MW, Romein B, Ihalainen P, Malandra S, Birikh KR

[2018] Enzymatic process to unlock the lignin value
Front. Bioeng. Biotechnol., 10.3389/fbioe.2018.00020
Main hurdles of lignin valorization are its diverse chemical composition, recalcitrance, and poor solubility due to high-molecular weight and branched structure. Controlled fragmentation of lignin could lead to its use in higher value products such as binders, coatings, [...]

Rodríguez-Escribano D, de Salas F, Pardo I, Camarero S

[2017] High-Throughput Screening Assay for Laccase Engineering toward Lignosulfonate Valorization
Int. J. Mol. Sci., 18: 1793-1803
Lignin valorization is a pending issue for the integrated conversion of lignocellulose in consumer goods. Lignosulfonates (LS) are the main technical lignins commercialized today. However, their molecular weight should be enlarged to meet application requirements as additives [...]

Martínez AT, Ruiz-Dueñas FJ, Camarero S, Serrano A, Linde D, Lund H, Vind J, Tovborg M, Herold-Majumdar OM, Hofrichter M, Liers C, Ullrich R, Scheibner K, Sannia G, Piscitelli A, Pezzella C, Sener ME, Kılıç S, van Berkel WJ, Guallar V, Lucas F, Zuhse R, Ludwig R, Hollmann F, Fernandez-Fueyo E, Record E, Faulds CB, Tortajada M, Winckelmann I, Rasmussen J, Gelo-Pujic M, Gutiérrez A, del Río JC, Rencoret J, Alcalde M

[2017] Oxidoreductases on their way to industrial biotransformations
Biotechnol. Adv., 35: 815-831
Fungi produce heme-containing peroxidases and peroxygenases, flavin-containing oxidases and dehydrogenases, and different copper-containing oxidoreductases involved in the biodegradation of lignin and other recalcitrant compounds. Heme peroxidases comprise the classical [...]