Crystal structure of a calcium(II)–pyrroloquinoline quinone (PQQ) complex outside a protein environment

Synthesis and Crystal Structure of a Novel Six-Coordinate Gallium (III) Complex

The reaction of gallium (III) nitrate octahydrate with the proton transfer compound (pydaH2)2+ (pydc)2– ( where  pyda  is 2,6-pyridinediamine and pydcH2 is 2,6-pyridinedicarboxylic acid) leads to the formation of (C5H8N3) [Ga(C7H3NO4)2] · 4H2O · CH3OH. The crystal system of the anionic complex is triclinic with space group Pī and two molecules per unit cell. The unit cell parameters are a=10.23...

Identification of lactate dehydrogenase as a mammalian pyrroloquinoline quinone (PQQ)-binding protein

Pyrroloquinoline quinone (PQQ), a redox-active o-quinone, is an important nutrient involved in numerous physiological and biochemical processes in mammals. Despite such beneficial functions, the underlying molecular mechanisms remain to be established. In the present study, using PQQ-immobilized Sepharose beads as a probe, we examined the presence of protein(s) that are capable of binding PQQ i...

The pyrroloquinoline quinone (PQQ)-containing quinoprotein dehydrogenases.

L. (1995) Biochemistry 34, 11080-1 1089 10 Friden, H. and Hederstedt, L. (1990) Mol. Microbiol. 4, 1045-1056 1 1 Nakamura, K., Yamaki, M., Sarada, M., Nakayama, S., Vibat, C. R. T., Gennis, R. B., Nakayashiki, T., Inokuchi, H., Kojima, S. and Kita, K. (1996) J. Biol. Chem. 271, 521-527 12 Hagerhall, C. and Hederstedt, L. (1996) FEBS Lett. 389, 25-31 13 Pennoyer, J. D., Ohnishi, T. and Trumpower...

Synthesis, Characterization, and Crystal Structure Determination of a New Copper(II) Complex: [H2en][Cu(pydc)2].2H2O

The new complex of [H2en][Cu(pydc)2].2H2O (1) (where H2en and pydc are ethylenediammonium and 2,6-pyridinedicarboxylate, respectively) was synthesized by the reaction of a mixture of ethylenediamine (en) and 2,6-pyridinedicarboxylic acid (H2pydc) in a mixture of CH3OH/H2O as solvent. This complex was fully characterized by elemental analysis, IR, UV–Vis spectroscopy as well as single-crystal X-...

Crystal structure of a herpesvirus cyclincdk complex