Eugenia Rivera

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The D-alanylation of lipoteichoic acid (LTA) allows the Gram-positive organism to modulate its surface charge, regulate ligand binding, and control the electromechanical properties of the cell wall. The incorporation of D-alanine into LTA requires the D-alanine:D-alanyl carrier protein ligase (AMP-forming) (Dcl) and the carrier protein (Dcp). The(More)
Pseudomonas syringae pv. syringae is a common inhabitant of a large variety of plants and the causal agent of bacterial apical necrosis of mango. In this work, we describe production and preliminary characterization of a novel antimetabolite toxin, designated mangotoxin, by P. syringae pv. syringae strains mainly isolated from mango trees. The toxin was(More)
The GAL4 transcription factor from yeast contains within its N-terminal DNA-binding domain an amino acid sequence containing six cysteine residues, C11-X2-C14-X6-C21-X6-C28-X2-C31-X6-C38. The six Cys residues will form a binuclear metal cluster with either Zn(II) or Cd(II) in which two of the -S- donors are bridging ligands between the two metal ions.(More)
1-Phenylcyclopropylamine (1-PCPA) is shown to be an inactivator of the fungal flavoenzyme monoamine oxidase (MAO) N. Inactivation results in an increase in absorbance at 410 nm and is accompanied by the concomitant loss of the flavin absorption band at 458 nm. The spectral properties of the covalent adduct formed between the flavin cofactor of MAO N and(More)
INTRODUCTION A long-standing concept in vision science has held that a single photoreceptor expresses a single type of opsin, the protein component of visual pigment. However, the number of examples in the literature of photoreceptors from vertebrates and invertebrates that break this rule is increasing. For example, cones of rodent retinas and the(More)
Materials and reagents The complex [PtCl(dien)]Cl (dien = diethylenetriamine) was prepared by literature methods. 1 Purity was confirmed by 1H and 195Pt NMR Spectroscopy, and Elemental Analysis (performed by QTI Laboratory, USA). All reagents were purchased from Sigma Aldrich, USA and used without further purification. The NCp7 C-terminal peptide sequence(More)
Physicochemical properties of coordination compounds can be exploited for molecular recognition of biomolecules. The inherent π-π stacking properties of [Pt(chelate)(N-donor)]2+ ([PtN4]) complexes were modulated by systematic variation of the chelate (diethylenetriamine and substituted derivatives) and N-donor (nucleobase or nucleoside) in the formally(More)
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