C
Chingkuang Tu
Researcher at University of Florida
Publications - 136
Citations - 4829
Chingkuang Tu is an academic researcher from University of Florida. The author has contributed to research in topics: Carbonic anhydrase & Carbonic anhydrase II. The author has an hindex of 40, co-authored 136 publications receiving 4583 citations. Previous affiliations of Chingkuang Tu include Cornell University & Florida State University College of Arts and Sciences.
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Role of histidine 64 in the catalytic mechanism of human carbonic anhydrase II studied with a site-specific mutant
TL;DR: The results suggest that the mutation has specifically affected the rate of proton transfer between the active site and the reaction medium, and can be overcome by increasing the concentration of certain buffers, such as imidazole and 1-methylimidazoles, but not by others buffers,such as MOPS or HEPES.
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Atomic crystal and molecular dynamics simulation structures of human carbonic anhydrase II: insights into the proton transfer mechanism
S.Z. Fisher,C.M Maupin,M. Budayova-Spano,Lakshmanan Govindasamy,Chingkuang Tu,Mavis Agbandje-McKenna,David N. Silverman,Gregory A. Voth,Robert McKenna +8 more
TL;DR: The HCA II crystal structure observed is most likely in the Zn-bound water/His64 state, and it is interesting that the observed active site solvent positions in the crystal structure are also the most probable positions of the solvent during the MD simulations.
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Structural and Kinetic Characterization of Active-Site Histidine as a Proton Shuttle in Catalysis by Human Carbonic Anhydrase II
Zoë Fisher,Jose A. Hernandez Prada,Chingkuang Tu,David M. Duda,Craig Yoshioka,Haiqian An,Lakshmanan Govindasamy,David N. Silverman,Robert McKenna +8 more
TL;DR: The data suggest that the number of intervening water molecules between the donor and acceptor supporting efficient proton transfer in HCA II is important, and furthermore suggest that a water bridge consisting of two intervening water molecule is consistent with efficient propton transfer.
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Catalytic Properties of Human Manganese Superoxide Dismutase
TL;DR: The depletion of superoxide catalyzed by human manganese superoxide dismutase (MnSOD) was observed spectrophotometrically and showed a strong dependence on pH that could be described by an ionization of pKa 9.4 ± 0.1 with a maximum at low pH.