Inhibition mechanism of SAHA in HDAC: a revisit

Literature Information

Publication Date 2015-10-08
DOI 10.1039/C5CP05633K
Impact Factor 3.676
Authors

Jingwei Zhou, Ruibo Wu


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Abstract

SAHA (vorinostat, Merck) is a famous clinical drug for zinc-containing histone deacetylase (HDAC) targets against cancer and several other human disorders, whose inhibition mechanism (namely the protonation mechanism) upon binding to HDAC has been debated for more than ten years. It is very challenging to verify experimentally and is still controversial theoretically. The popular “Class-dependent” (namely “Tyr-dependent”) hypothesis is that the deprotonation of SAHA is mostly regulated by the conserved Tyr308 in class I HDAC while it is replaced by the His843 in class IIa HDAC. Herein, by elaborate QM(DFT)/MM MD simulations, we exclude the prevalent “Class-dependent” mechanism and advance a novel “Metal-dependent” mechanism, where the remote second metal site (K+ in most HDAC and Ca2+ in HDAC2) determines the protonation of SAHA. This proof-of-principle “Metal-dependent” mechanism opens up a new avenue to utilize the second metal site for isoform-selective inhibitor design.

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Source Journal

Physical Chemistry Chemical Physics

Physical Chemistry Chemical Physics
CiteScore: 5.5
Self-citation Rate: 10.3%
Articles per Year: 3036

Physical Chemistry Chemical Physics (PCCP) is an international journal co-owned by 19 physical chemistry and physics societies from around the world. This journal publishes original, cutting-edge research in physical chemistry, chemical physics and biophysical chemistry. To be suitable for publication in PCCP, articles must include significant innovation and/or insight into physical chemistry; this is the most important criterion that reviewers and Editors will judge against when evaluating submissions. The journal has a broad scope and welcomes contributions spanning experiment, theory, computation and data science. Topical coverage includes spectroscopy, dynamics, kinetics, statistical mechanics, thermodynamics, electrochemistry, catalysis, surface science, quantum mechanics, quantum computing and machine learning. Interdisciplinary research areas such as polymers and soft matter, materials, nanoscience, energy, surfaces/interfaces, and biophysical chemistry are welcomed if they demonstrate significant innovation and/or insight into physical chemistry. Joined experimental/theoretical studies are particularly appreciated when complementary and based on up-to-date approaches.

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