scholarly journals Structural studies of RNase M5 reveal two-metal-ion supported two-step dsRNA cleavage for 5S rRNA maturation

RNA Biology ◽  
2021 ◽  
pp. 1-11
Author(s):  
Stephanie Oerum ◽  
Marjorie Catala ◽  
Maxime Bourguet ◽  
Laetitia Gilet ◽  
Pierre Barraud ◽  
...  
Keyword(s):  
Metal Ion ◽  
5S Rrna ◽  
Structural Studies ◽  
Rrna Maturation ◽  
Dsrna Cleavage

scholarly journals Electrochemical Conversion: Beyond the First Cycle

2014 ◽  
Vol 70 (a1) ◽  
pp. C361-C361
Author(s):  
Tiffany Kinnibrugh ◽  
Kamila Wiaderek ◽  
Olaf Borkiewicz ◽  
Nathalie Pereira ◽  
Glenn Amatucci ◽  
...  
Keyword(s):  
Metal Ion ◽  
Pair Distribution Function ◽  
Structural Changes ◽  
Electrode Materials ◽  
Commercial Application ◽  
Structural Studies ◽  
Electrochemical Conversion ◽  
Pdf Analysis ◽  
Intercalation Materials ◽  
Repeated Cycling

Conversion based electrode materials offer increased energy storage compared to conventional intercalation materials due to the multiple electrons that reacts per metal ion. However, loss in capacities upon repeated cycling has limited the development of this technology for commercial application. Most structural studies focus on the first discharge-charge cycle [1,2,3]. To understand the loss in capacities with repeated cycling, studies must be extended beyond the first cycle. In conversion reactions, large structural transformations occur such that the electrode is reduced to the nanoscale. Pair distribution function (PDF) analysis is well suited to characterize the structural changes occurring in such nanomaterials. Conversion based iron fluorides (FeF3, FeF2, and FeOF) have been a focus of both structural and mechanistic studies [1,2,3]. An in-depth PDF analysis of what happens beyond the first cycle will be presented for these.

Synthetic and structural studies on metal complexes of tripyrrin

2003 ◽  
Vol 07 (01) ◽  
pp. 17-24 ◽  
Author(s):  
Martin Bröring ◽  
Carsten D. Brandt ◽  
Serguei Prikhodovski
Keyword(s):  
Transition Metal ◽  
Metal Complexes ◽  
Metal Ion ◽  
Coordination Geometry ◽  
Structural Studies ◽  
Structural Investigations ◽  
Coordination Polyhedra ◽  
X Ray ◽  
Step Procedure ◽  
Porphyrin Analogues

A general two-step procedure for the synthesis of metallotripyrrinates TrpyMOAc f with M = Co(II) , Cu(II) , Zn(II) and Pd(II) , and OAc f = trifluoroacetate, is described, starting from well-known monopyrrolic precursors and simple transition metal acetates. X-ray structural investigations were undertaken on four different complexes, and the results reveal, that the nature of the metal ion, rather than the ligand, determines the coordination geometry of these porphyrin fragment complexes. The finding of pseudotetrahedral and strained pseudoplanar coordination polyhedra at the metal centres makes a clear distinction between metalloporphyrins and metallotripyrrins and shows the latter to be related to some recently discovered metal chelates of macrocyclic porphyrin analogues.

Structural Studies of Metal Binding by Inositol Monophosphatase: Evidence for Two-Metal Ion Catalysis

Biochemistry ◽  
1994 ◽  
Vol 33 (32) ◽  
pp. 9468-9476 ◽  
Author(s):  
Roger Bone ◽  
Lori Frank ◽  
James P. Springer ◽  
John R. Atack
Keyword(s):  
Metal Binding ◽  
Metal Ion ◽  
Structural Studies ◽  
Inositol Monophosphatase ◽  
Metal Ion Catalysis

scholarly journals Overaccumulation of the chloroplast antisense RNA AS5 is correlated with decreased abundance of 5S rRNA in vivo and inefficient 5S rRNA maturation in vitro

RNA ◽  
2010 ◽  
Vol 17 (2) ◽  
pp. 230-243 ◽  
Author(s):  
R. E. Sharwood ◽  
A. M. Hotto ◽  
T. J. Bollenbach ◽  
D. B. Stern
Keyword(s):  
Antisense Rna ◽  
5S Rrna ◽  
Maturation In Vitro ◽  
Rrna Maturation

Structural studies on transition metal ion complexes of polyethylene oxide-natural rubber block copolymers

2019 ◽  
Vol 26 (8) ◽  
Author(s):  
M. S. Mrudula ◽  
Nidhi Tiwari ◽  
Shambhu Nath Jha ◽  
Dibyendu Bhattacharyya ◽  
M. R. Gopinathan Nair
Keyword(s):  
Block Copolymers ◽  
Transition Metal ◽  
Natural Rubber ◽  
Polyethylene Oxide ◽  
Metal Ion ◽  
Structural Studies ◽  
Metal Ion Complexes ◽  
Transition Metal Ion ◽  
Rubber Block

Structural Studies of Complexes of Tridentate Terimine Systems. Crystal Structure of Bis(2,2′:6′,2′′-terpyridine)ruthenium(II) Perchlorate Hydrate, Bis(2,2′:6′,2′′-terpyridine)- osmium(II) Perchlorate Hemihydrate and Bis((1,10-phenanthrolin-2-yl)(pyridin-2-yl)amine)iron(II) Tetrafluoroborate Dihydrate

1998 ◽  
Vol 51 (12) ◽  
pp. 1131 ◽  
Author(s):  
Donald C. Craig ◽  
Marcia L. Scudder ◽  
Wendy-Anne McHale ◽  
Harold A. Goodwin
Keyword(s):  
Crystal Structure ◽  
Crystal Structures ◽  
Metal Ion ◽  
Chelate Ring ◽  
Monoclinic Space Group ◽  
Structural Studies ◽  
Triclinic Space Group ◽  
Space Group ◽  
Membered Chelate Ring ◽  
Group I

The crystal structures of bis(2,2′:6′,2″-terpyridine)ruthenium(II) perchlorate hydrate, bis(2,2′:6′,2″- terpyridine)osmium(II) perchlorate hemihydrate and bis((1,10-phenanthrolin-2-yl)(pyridin-2-yl)- amine)iron(II) tetrafluoroborate dihydrate are described. In the terpyridine complexes the ruthenium-nitrogen distances and the corresponding osmium-nitrogen distances are not significantly different. In both complexes the ligand geometry and the metal ion environment show the distortions usual for bis(terpyridine) systems. Distortions are less marked in the bis((1,10-phenanthrolin-2-yl)(pyridin-2-yl)amine)iron(II) cation in which each tridentate unit forms one five-membered and one six-membered chelate ring. [Ru(trpy)2] [ClO4]2.(H2O)1.1: tetragonal, space group I 41/a, a, b 12·527(2), c 40·202(11) Å, Z 8. [Os(trpy)2] [ClO4]2.(H2O)0·5: monoclinic, space group P 21/n, a 8·842(3), b 8·861(1), c 39·22(2) Å, β93·89(2)°, Z 4. [Fe(phpyam)2] [BF4]2.(H2O)2: triclinic, space group P -1, a 12·43(1), b 12·45(1), c 13·35(1) Å, α 62·70(10), β 78·55(8), γ 72·46(9)°, Z 2.

Oxocomplexes of Mo(vi) and W(vi) with 8-hydroxyquinoline-5-sulfonate in solution: structural studies and the effect of the metal ion on the photophysical behaviour

2015 ◽  
Vol 44 (44) ◽  
pp. 19076-19089 ◽  
Author(s):  
M. Luísa Ramos ◽  
Licínia L. G. Justino ◽  
Paulo E. Abreu ◽  
Sofia M. Fonseca ◽  
Hugh D. Burrows
Keyword(s):  
Metal Ion ◽  
Structural Studies

Mo(vi) and W(vi) complexes with 8-HQS show differences in luminescence behaviour, attributed to the relative energies of their LMCT and emitting ligand based levels.

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