S
Stephen H. Brown
Researcher at Novo Nordisk
Publications - 32
Citations - 2499
Stephen H. Brown is an academic researcher from Novo Nordisk. The author has contributed to research in topics: Laccase & Aspergillus oryzae. The author has an hindex of 14, co-authored 32 publications receiving 2397 citations. Previous affiliations of Stephen H. Brown include Johns Hopkins University.
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Journal ArticleDOI
A study of a series of recombinant fungal laccases and bilirubin oxidase that exhibit significant differences in redox potential, substrate specificity, and stability
Feng Xu,Woonsup Shin,Stephen H. Brown,Jill Angela Wahleithner,Uma M. Sundaram,Edward I. Solomon +5 more
TL;DR: It is speculated that structural differences in the substrate-activation site (a 'blue', type 1 copper center) control the redox potential range as well as substrate specificity, and the cystine content contributes to stability.
Journal ArticleDOI
Crystal structure of the type-2 Cu depleted laccase from Coprinus cinereus at 2.2 A resolution.
Valérie M.-A. Ducros,Andrzej M. Brzozowski,Keith S. Wilson,Stephen H. Brown,Peter Rahbek Østergaard,Palle Schneider,Debbie Yaver,Anders Hjelholt Pedersen,Gideon J. Davies +8 more
TL;DR: The structure of laccase from the fungus Coprinus cinereus has been determined by X-ray crystallography at a resolution of 2.2 Å and is a monomer composed of three cupredoxin-like β-sandwich domains, similar to that found in ascorbate oxidase.
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Purification, characterization, molecular cloning, and expression of two laccase genes from the white rot basidiomycete Trametes villosa.
Debbie Yaver,Feng Xu,Elizabeth Golightly,Kimberly Brown,Stephen H. Brown,Ray Michael W,Palle Schneider,Torben Halkier,K Mondorf,H. Dalbøge +9 more
TL;DR: Two laccases have been purified to apparent electrophoretic homogeneity from the extracellular medium of a 2,5-xylidine-induced culture of the white rot basidiomycete Trametes villosa and the purified recombinant protein has the same pI, spectral properties, stability, and pH profiles as the purified native protein.
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Characterization of the gene encoding an extracellular laccase of Myceliophthora thermophila and analysis of the recombinant enzyme expressed in Aspergillus oryzae.
Randy M. Berka,Palle Schneider,Elizabeth Golightly,Stephen H. Brown,Mark Madden,Kimberly Brown,Torben Halkier,K Mondorf,Feng Xu +8 more
TL;DR: The deduced amino acid sequence of M. thermophila laccase (MtL) shows homology to laccases from diverse fungal genera and Amino-terminal sequence data suggests that MtL is synthesized as a preproenzyme.
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Site-directed mutations in fungal laccase: effect on redox potential, activity and pH profile
Feng Xu,Randy M. Berka,Jill Angela Wahleithner,Beth A. Nelson,Jeffrey R. Shuster,Stephen H. Brown,Amy E. Palmer,Edward I. Solomon +7 more
TL;DR: Although the redox potentials were not significantly altered, the Km, kcat and fluoride inhibition of the laccases were greatly changed by the mutations, interpreted as possible mutation-induced structural perturbations on the molecular recognition between the reducing substrate and laccase and on the electron transfer from the substrate to the type-1 Cu centre.