Incorporation of ‘click’ chemistry glycomimetics dramatically alters triple-helix stability in an adiponectin model peptide
作者:Katherine R. Lutteroth、Paul W. R. Harris、Tom H. Wright、Harveen Kaur、Kevin Sparrow、Sung-Hyun Yang、Garth J. S. Cooper、Margaret A. Brimble
DOI:10.1039/c7ob01388d
日期:——
glycosylated lysine residues for the formation of bioactive high molecular weight oligomers of Adpn. Through the use of ‘click’ glycopeptide mimetics, we investigated the role of glycosylated lysine and serine residues for the formation of triple helical structures of the collagenous domain of Adpn, in the context of a collagen model peptide scaffold. The physical properties of the unglycosylated lysine and
Synthesis and Characterisation of Substrate-Based Peptides as Inhibitors of Histone Demethylase KDM4C
作者:Simon D. Nielsen、Ulrike Leurs、Magnus Bergner、Silvia A. Barris、Kanchan Devkota、Kamilla Meyer,、Daniella Iaria、Jack McCaughan、Brian Lohse、Jesper L. Kristensen、Rasmus P. Clausen
DOI:10.2174/0929866523666160613210831
日期:2016.8.8
The design and synthesis of modified pentapeptides based on a truncated
version of the substrate for KDM4C, a histone lysine demethylase (KDM), and investigation
of their inhibitory activity at KDM4C is reported. By modifying the
lysine residue corresponding to lysine 9 at histone 3 (H3K9), three different series of
peptides were designed and synthesized. One series contained N-acylated H3K9 and
two series introduced triazoles in this position via click chemistry to enable facile
variation of headgroups. The click reaction is compatible with free amino acids and
this was performed on an azido containing deprotected pentapeptide demonstrating a
highly facile and convergent synthetic strategy for making substrate-based inhibitors.
One of the 14 peptides showed inhibitory activity at KDM4C demonstrating the
need for an iron chelator in the pentapeptide series.
The present invention relates to macrocyclic compounds which are capable of selective binding to a target saccharide (e.g. glucose), making them particularly well suited for use in saccharide sensing applications. The present invention also relates to processes for the preparation of said compounds, to compositions and devices comprising them, and to their use in the detection of a target saccharide.
Drug Design Inspired by Nature: Crystallographic Detection of an Auto‐Tailored Protease Inhibitor Template
作者:Flavio M. Gall、Deborah Hohl、David Frasson、Tobias Wermelinger、Peer R. E. Mittl、Martin Sievers、Rainer Riedl
DOI:10.1002/anie.201812348
日期:2019.3.18
from the endogenous tissue inhibitors of metalloproteinases (TIMPs). The incorporation of non‐proteinogenic aminoacids in combination with a cyclization strategy proved to be key for the denovo design of TIMP peptidomimetics. The optimized cyclicpeptide 4 (ZHAWOC7726) is membrane permeable with an IC50 of 21 nm for MMP‐13 and an attractive selectivity profile with respect to a polypharmacology approach
从头开始发现药物仍然是寻找治疗相关靶蛋白的有效和选择性调节剂的挑战。在这里,我们揭示了X射线晶体学法意外发现的肽配体1,它是由治疗靶点MMP-13通过部分自降解和随后基于结构的优化自动构建为高效的选择性β-片层的拟肽抑制剂,衍生自金属蛋白酶的内源性组织抑制剂。事实证明,结合非蛋白原性氨基酸和环化策略是TIMP拟肽模拟设计的关键。优化的环肽4(ZHAWOC7726)具有21 n m IC 50的膜渗透性MMP-13的选择性和相对于多药理学方法的诱人的选择性,包括抗癌靶标MMP-2(IC 50:170 n m)和MMP-9(IC 50:140 n m)。
The 1,3‐diyne linker as a rigid “
<i>i</i>
,
<i>i</i>
+7” staple for α‐helix stabilization: Stereochemistry at work
作者:Steven Verlinden、Niels Geudens、Kevin Van holsbeeck、Morgane Mannes、José C. Martins、Guido Verniest、Steven Ballet
DOI:10.1002/psc.3194
日期:2019.7
Short alphahelical peptide sequences were stabilized through Glaser‐Hay couplings of propargylated l‐ and/or d‐serine residues at positions i and i+7. NMR analysis confirmed a full stabilization of the helical structure when a d‐Ser (i), l‐Ser (i+7) combination was applied. In case two l‐Ser residues were involved in the cyclization, the helical conformation is disrupted outside the peptide's macrocycle