Chromogenic detection of Sarin by discolouring decomplexation of a metal coordination complex

2013 ◽  
Vol 49 (79) ◽  
pp. 8946 ◽  
Author(s):  
Lucie Ordronneau ◽  
Alexandre Carella ◽  
Miroslav Pohanka ◽  
Jean-Pierre Simonato
Keyword(s):  
Coordination Complex ◽  
Metal Coordination

A Photoluminescent Metal Coordination Complex Constructed from Hydrothermal in situ Generated Quinoline-monoacyl­hydrazidate Ligand

2015 ◽  
Vol 642 (1) ◽  
pp. 20-24 ◽  
Author(s):  
Qing-Feng Yang ◽  
Hong-Cun Bai ◽  
Bing Li ◽  
Min Luo ◽  
Juan Jin ◽  
...  
Keyword(s):  
Coordination Complex ◽  
Metal Coordination

scholarly journals Structure and two-metal mechanism of a eukaryal nick-sealing RNA ligase

2015 ◽  
Vol 112 (45) ◽  
pp. 13868-13873 ◽  
Author(s):  
Mihaela-Carmen Unciuleac ◽  
Yehuda Goldgur ◽  
Stewart Shuman
Keyword(s):  
Reaction Pathway ◽  
Domain Architecture ◽  
Coordination Complex ◽  
Metal Coordination ◽  
Rna Repair ◽  
Rna Ligase ◽  
Dna Ligases ◽  
Catalytic Metal ◽  
Rna Capping ◽  
Unique Domain

ATP-dependent RNA ligases are agents of RNA repair that join 3′-OH and 5′-PO4 RNA ends. Naegleria gruberi RNA ligase (NgrRnl) exemplifies a family of RNA nick-sealing enzymes found in bacteria, viruses, and eukarya. Crystal structures of NgrRnl at three discrete steps along the reaction pathway—covalent ligase-(lysyl-Nζ)–AMP•Mn2+ intermediate; ligase•ATP•(Mn2+)2 Michaelis complex; and ligase•Mn2+ complex—highlight a two-metal mechanism of nucleotidyl transfer, whereby (i) an enzyme-bound “catalytic” metal coordination complex lowers the pKa of the lysine nucleophile and stabilizes the transition state of the ATP α phosphate; and (ii) a second metal coordination complex bridges the β- and γ-phosphates. The NgrRnl N domain is a distinctively embellished oligonucleotide-binding (OB) fold that engages the γ-phosphate and associated metal complex and orients the pyrophosphate leaving group for in-line catalysis with stereochemical inversion at the AMP phosphate. The unique domain architecture of NgrRnl fortifies the theme that RNA ligases have evolved many times, and independently, by fusions of a shared nucleotidyltransferase domain to structurally diverse flanking modules. The mechanistic insights to lysine adenylylation gained from the NgrRnl structures are likely to apply broadly to the covalent nucleotidyltransferase superfamily of RNA ligases, DNA ligases, and RNA capping enzymes.

In situ creation of multi-metallic species inside porous silicate materials with tunable catalytic properties

2021 ◽  
Author(s):  
Yang-Yang Liu ◽  
Guo-Peng Zhan ◽  
Chuan-De Wu
Keyword(s):  
Catalytic Properties ◽  
Porous Metal ◽  
Coordination Complex ◽  
Metal Coordination ◽  
Metal Silicate ◽  
Porous Silicate ◽  
Metallic Species ◽  
Silicate Materials

Porous metal silicate (PMS) material PMS-11, consisting of uniformly distributed multi-metallic species inside the pores, is synthesized by using a discrete multi-metal coordination complex as the template, demonstrating high catalytic...

An organometallic complex revealing an unexpected, reversible, temperature induced SC–SC transformation

CrystEngComm ◽  
2014 ◽  
Vol 16 (21) ◽  
pp. 4641-4652 ◽  
Author(s):  
Rupert G. D. Taylor ◽  
Benjamin R. Yeo ◽  
Andrew J. Hallett ◽  
Benson M. Kariuki ◽  
Simon J. A. Pope
Keyword(s):  
Phase Transformation ◽  
Transition Metal ◽  
Single Crystal ◽  
Coordination Complex ◽  
Metal Coordination ◽  
Organometallic Complex

A reversible, temperature driven phase transformation that takes place at ca. 180 K, in a single-crystal to single-crystal manner, has been observed for a monometallic transition metal coordination complex based on a fac-Re(CO)3 core, with a chelated 2,2′-bipyridine unit and a halogenated N-(4-iodophenyl)nicotinamide axial co-ligand.

Sign in / Sign up

Export Citation Format

Share Document