Model Systems for Flavoenzyme Activity: Relationships between Cofactor Structure, Binding and Redox Properties
摘要:
A series of flavins were synthesized bearing electron-withdrawing and -donating substituents. The electrochemical properties of these flavins in a nonpolar solvent were determined. The recognition of these flavins by a diamidopyridine (DAP) receptor and the effect this receptor has on flavin redox potential was also quantified. It was found that the DAP-flavin binding affinity and the reduction potentials (E-1/2) for both the DAP-bound and unbound flavins correlated well with functions derived from linear free energy relationships (LFERs). These results provide insight and predictive capability for the interplay of electronics and redox state-specific interactions for both abiotic and enzymatic systems.
受到大自然的启发并基于机理理解,我们设计了具有与 Li 相当的还原能力的脱氮黄素 (dFl),其通过独立于分子氧的连续光诱导电子转移 ( con PET) 机制发挥作用。通过将溴引入光催化剂而产生的内部重原子效应(IHAE)通过三重态自由基对显着增强了关键的三重态途径。此外,需要最佳浓度的牺牲电子供体(S sac )来绕过通过单重态自由基对的非生产性反应。
Discovery of Conformationally Restricted Human Glutaminyl Cyclase Inhibitors as Potent Anti-Alzheimer’s Agents by Structure-Based Design
作者:Van-Hai Hoang、Van T. H. Ngo、Minghua Cui、Nguyen Van Manh、Phuong-Thao Tran、Jihyae Ann、Hee-Jin Ha、Hee Kim、Kwanghyun Choi、Young-Ho Kim、Hyerim Chang、Stephani Joy Y. Macalino、Jiyoun Lee、Sun Choi、Jeewoo Lee
DOI:10.1021/acs.jmedchem.9b00751
日期:2019.9.12
analyses indicated that conformationally restrained inhibitors demonstrated much improved QC inhibition in vitro compared to nonrestricted analogues, and several selected compounds demonstrated desirable therapeutic activity in an AD mouse model. The conformational analysis of a representative inhibitor indicated that the inhibitor appeared to maintain the Z-E conformation at the active site, as it
[EN] INHIBITORS OF HISTONE DEACETYLASE<br/>[FR] INHIBITEURS DE L'HISTONE DEACETYLASE
申请人:METHYLGENE INC
公开号:WO2004069823A1
公开(公告)日:2004-08-19
The invention relates to the inhibition of histone deacetylase. The invention provides compounds and methods for inhibiting histone deacetylase enzymatic activity. The invention also provides compositions and methods for treating cell proliferative diseases and conditions.
Selective functionalization of flavin analogues is desirable for property tuning but requires de novo synthesis. A synthetic strategy involving the introduction of a remote redox site followed by copper complexation turns an alloxazine and a flavin into redox-active structures and activates their aromatic ring for site-selective aromatic C−H functionalization. This unprecedented mechanism opens new
Model Systems for Flavoenzyme Activity: Relationships between Cofactor Structure, Binding and Redox Properties
作者:Yves-Marie Legrand、Mark Gray、Graeme Cooke、Vincent M. Rotello
DOI:10.1021/ja036940b
日期:2003.12.1
A series of flavins were synthesized bearing electron-withdrawing and -donating substituents. The electrochemical properties of these flavins in a nonpolar solvent were determined. The recognition of these flavins by a diamidopyridine (DAP) receptor and the effect this receptor has on flavin redox potential was also quantified. It was found that the DAP-flavin binding affinity and the reduction potentials (E-1/2) for both the DAP-bound and unbound flavins correlated well with functions derived from linear free energy relationships (LFERs). These results provide insight and predictive capability for the interplay of electronics and redox state-specific interactions for both abiotic and enzymatic systems.
Tuning Deazaflavins Towards Highly Potent Reducing Photocatalysts Guided by Mechanistic Understanding – Enhancement of the Key Step by the Internal Heavy Atom Effect
作者:Tetiana Pavlovska、David Král Lesný、Eva Svobodová、Irena Hoskovcová、Nataliya Archipowa、Roger Jan Kutta、Radek Cibulka
DOI:10.1002/chem.202200768
日期:2022.8.16
Inspired by nature and based on mechanisticunderstanding, we designed deazaflavins (dFl) with reducing powers comparable to Li which function via the consecutive photo-induced electron transfer (conPET) mechanism independently on molecular oxygen. The internalheavyatomeffect (IHAE) by introducing bromine into the photocatalystenhances considerably the key triplet pathway via a triplet-born radical
受到大自然的启发并基于机理理解,我们设计了具有与 Li 相当的还原能力的脱氮黄素 (dFl),其通过独立于分子氧的连续光诱导电子转移 ( con PET) 机制发挥作用。通过将溴引入光催化剂而产生的内部重原子效应(IHAE)通过三重态自由基对显着增强了关键的三重态途径。此外,需要最佳浓度的牺牲电子供体(S sac )来绕过通过单重态自由基对的非生产性反应。