Z
Zulfiqar Hasan
Researcher at University of Amsterdam
Publications - 6
Citations - 258
Zulfiqar Hasan is an academic researcher from University of Amsterdam. The author has contributed to research in topics: Vanadium bromoperoxidase & Vanadium. The author has an hindex of 5, co-authored 6 publications receiving 237 citations.
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Journal ArticleDOI
Laboratory-evolved Vanadium Chloroperoxidase Exhibits 100-Fold Higher Halogenating Activity at Alkaline pH CATALYTIC EFFECTS FROM FIRST AND SECOND COORDINATION SPHERE MUTATIONS
Zulfiqar Hasan,Rokus Renirie,Richard Kerkman,Harald J. Ruijssenaars,Aloysius F. Hartog,Ron Wever +5 more
TL;DR: The catalytic effects suggest that fine tuning of residues Lys-353 and Phe-397, along with addition of negative charge or removal of positive charge near one of the vanadate oxygens, is very important in peroxide activation and halide binding.
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51V solid-state magic angle spinning NMR spectroscopy of vanadium chloroperoxidase
† Neela Pooransingh-Margolis,Rokus Renirie,Zulfiqar Hasan,Ron Wever,and Alexander J. Vega,Tatyana Polenova +5 more
TL;DR: The work reported in this manuscript is the first example of 51V solid-state NMR spectroscopy applied to probe the vanadium center in a protein directly, and is expected to be generally applicable for studies of diamagnetic vanadium sites in metalloproteins.
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Phosphorylation and dephosphorylation of polyhydroxy compounds by class A bacterial acid phosphatases.
TL;DR: The kinetics of the phosphorylation and dephosphorylation reaction catalysed by the acid phosphatases from Shigella flexneri and Salmonella enterica are examined, likely that this class of enzyme is able to phosphorylate a wide range of hydroxy compounds.
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Kinetic characterization of active site mutants Ser402Ala and Phe397His of vanadium chloroperoxidase from the fungus Curvularia inaequalis
TL;DR: Site-directed mutagenesis on two conserved active site residues of vanadium chloroperoxidase (VCPO) from the fungus Curvularia inaequalis resulted in the enhancement of bromination activity under certain conditions, however, inactivation of F397H by halide especially at low pH was observed during turnover.
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The enzymatic component of Drosophila melanogaster chorion is the Pxd peroxidase
Ourania A. Konstandi,Issidora S. Papassideri,Dimitrios J. Stravopodis,Christos A. Kenoutis,Zulfiqar Hasan,Theodoros Katsorchis,Ron Wever,Lukas H. Margaritis +7 more
TL;DR: The immunolocalization approach, using the anti-rAePO polyclonal antibody, has revealed that the Pxd peroxidase is selectively localized in the chorion structures and particularly in the endochorion and innermost chorionic layer (ICL).