Water Molecules in the Schiff Base Region of Bacteriorhodopsin

2003 ◽  
Vol 125 (44) ◽  
pp. 13312-13313 ◽  
Author(s):  
Mikihiro Shibata ◽  
Taro Tanimoto ◽  
Hideki Kandori
Keyword(s):  
Schiff Base ◽  
Water Molecules ◽  
Base Region

Strongly hydrogen-bonded water molecules in the Schiff base region of rhodopsins

2005 ◽  
Vol 4 (9) ◽  
pp. 661 ◽  
Author(s):  
Yuji Furutani ◽  
Mikihiro Shibata ◽  
Hideki Kandori
Keyword(s):  
Schiff Base ◽  
Water Molecules ◽  
Base Region ◽  
Hydrogen Bonded

FTIR Studies of Internal Water Molecules in the Schiff Base Region of Bacteriorhodopsin†

Biochemistry ◽  
2005 ◽  
Vol 44 (20) ◽  
pp. 7406-7413 ◽  
Author(s):  
Mikihiro Shibata ◽  
Hideki Kandori
Keyword(s):  
Schiff Base ◽  
Water Molecules ◽  
Base Region ◽  
Ftir Studies ◽  
Internal Water

Structural Changes in the Schiff Base Region of Squid Rhodopsin upon Photoisomerization Studied by Low-Temperature FTIR Spectroscopy†

Biochemistry ◽  
2006 ◽  
Vol 45 (9) ◽  
pp. 2845-2851 ◽  
Author(s):  
Toru Ota ◽  
Yuji Furutani ◽  
Akihisa Terakita ◽  
Yoshinori Shichida ◽  
Hideki Kandori
Keyword(s):  
Schiff Base ◽  
Low Temperature ◽  
Ftir Spectroscopy ◽  
Structural Changes ◽  
Base Region

Aqua{5,5′-dihydroxy-2,2′-[1,2-phenylenebis(nitrilomethylidyne)]diphenolato-κ4 O,N,N′,O′}zinc(II) trihydrate

2007 ◽  
Vol 63 (11) ◽  
pp. m2838-m2839 ◽  
Author(s):  
Naser Eltaher Eltayeb ◽  
Siang Guan Teoh ◽  
Suchada Chantrapromma ◽  
Hoong-Kun Fun ◽  
Kamarulazizi Ibrahim
Keyword(s):  
Schiff Base ◽  
Dihedral Angles ◽  
Water Molecules ◽  
Asymmetric Unit ◽  
Apical Position ◽  
Coordination Environment ◽  
Tetradentate Schiff Base ◽  
Solvent Water ◽  
Benzene Rings ◽  
Coordinated Water

In the title complex, [Zn(C20H14N2O4)(H2O)]·3H2O, the ZnII center is in an approximately square-pyramidal coordination environment with the two N and two O atoms of the tetradentate Schiff base ligand forming the basal plane and the coordinated water molecule in the apical position. Three solvent water molecules complete the asymmetric unit. The dihedral angles between the two outer benzene rings of the Schiff base and the central benzene ring are 12.64 (14) and 17.25 (14)°. In the crystal structure, intermolecular O—H...O hydrogen bonds link the molecules into sheets parallel to the ab plane.

FTIR Study of the Retinal Schiff Base and Internal Water Molecules of Proteorhodopsin†

Biochemistry ◽  
2007 ◽  
Vol 46 (18) ◽  
pp. 5365-5373 ◽  
Author(s):  
Daisuke Ikeda ◽  
Yuji Furutani ◽  
Hideki Kandori
Keyword(s):  
Schiff Base ◽  
Water Molecules ◽  
Ftir Study ◽  
Internal Water

Interaction of Internal Water Molecules with the Schiff Base in the L Intermediate of the Bacteriorhodopsin Photocycle†

Biochemistry ◽  
2002 ◽  
Vol 41 (11) ◽  
pp. 3803-3809 ◽  
Author(s):  
Akio Maeda ◽  
Sergei P. Balashov ◽  
Johan Lugtenburg ◽  
Michiel A. Verhoeven ◽  
Judith Herzfeld ◽  
...  
Keyword(s):  
Schiff Base ◽  
Water Molecules ◽  
Internal Water ◽  
Bacteriorhodopsin Photocycle

Analogy to a Chinese knot in an ion-pair copper(II)–neodymium(III) complex based on a hexadentate Schiff base condensation product of 5-bromosalicylaldehyde and glycylglycine

2013 ◽  
Vol 69 (4) ◽  
pp. 376-379
Author(s):  
Li-Qing Xu ◽  
Li-Ping Lu ◽  
Miao-Li Zhu
Keyword(s):  
Schiff Base ◽  
Self Assembly ◽  
Condensation Product ◽  
Ion Pair ◽  
Three Dimensions ◽  
Water Molecules ◽  
Solvent Water ◽  
Square Planar ◽  
Jahn Teller ◽  
Pentadentate Ligands

Self-assembly of CuCl2, NdCl3, 5-bromosalicylaldehyde and glycylglycine yields the ion-pair copper(II)–neodymium(III) complex, poly[[decaaquabis[μ3-2-({2-[(5-bromo-2-oxidobenzylidene)amino]acetyl}azanidyl)acetato]bis[μ2-2-({2-[(5-bromo-2-oxidobenzylidene)amino]acetyl}azanidyl)acetato]tetracopper(II)dineodymium(III)] bis{[2-({2-[(5-bromo-2-oxidobenzylidene)amino]acetyl}azanidyl)acetato]cuprate(II)} tetradecahydrate], {[Cu4Nd2(C11H8BrN2O4)4(H2O)10][Cu(C11H8BrN2O4)]2·14H2O}n. The anion is planar and mononuclear, showing an approximately square-planar coordination of the metal atom, while the cation is a hexanuclear centrosymmetric transition metal–lanthanide (Cu–Nd) heterometallic complex, with the independent copper cations in square-planar and square-pyramidal coordinations. The asymmetric unit comprises one half of this cation, one anion and seven solvent water molecules. The positions of the six metal centres in the cation reproduce a Chinese knot arrangement. The dipeptidic Schiff base releases three H atoms and can act as a tetradentate, a pentadentate or a hexadentate ligand. Longer interactions between the pentadentate ligands and the Jahn–Teller CuIIcation link the hexanuclear aggregates into cationic chains in the [010] direction in which 14- and 22-membered subloops occur. Extensive hydrogen bonding in three dimensions involves both the coordinated and the solvent water molecules.

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