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5 Sterol metabolism and functions in higher plants
Higher plants synthesize a bewildering array of sterols, with sitosterol, stigmasterol, and 24-methylcholesterol as major compounds. All plant...
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6 Sterol biochemistry and regulation in the yeast Saccharomyces cerevisiae
Saccharomyces cerevisiae has been a major model system for the study of sterol biosynthesis and function. All of the genes encoding the enzymes...
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7 Mammalian ACAT and DGAT2 gene families
Mammalian isozymes of ACAT, DGAT, and MGAT are encoded by the ACAT and DGAT2 gene families. These enzymes catalyze the synthesis of neutral lipid...
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S. cerevisiae K28 toxin – a secreted virus toxin of the A/B family of protein toxins
Since the initial discovery of toxin-secreting killer strains in the yeast Saccharomyces cerevisiae more than 40 years ago, continuous research on...
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Cholera toxin: mechanisms of entry into host cells
Cholera toxin moves from the plasma membrane to the ER of host cells to cause disease. Trafficking in this pathway depends on toxin binding to...
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The Ustilago maydis killer toxins
Killer toxins are small proteins secreted by a number of fungi that are lethal to susceptible cells (generally fungi of the same or related species)....
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Diphtheria toxin, diphtheria-related fusion protein toxins, and the molecular mechanism of their action against eukaryotic cells
Diphtheria toxin remains one of the most successfully studied of the bacterial protein toxins. A detailed understanding of the structure function...
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Transfer RNA modifications and modifying enzymes in Saccharomyces cerevisiae
Transfer RNAs are adaptor molecules, which decode mRNA into protein and, thereby, play a central role in gene expression. During the maturation of a...
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The biosynthesis and functional roles of methylated nucleosides in eukaryotic mRNA
Modified nucleosides are present in mRNA of all eukaryotes, albeit at much lower levels than in other RNA moieties such as rRNA, tRNA, and snRNA....
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Checkpoint and Coordinated Cellular Responses to DNA Damage
The DNA damage and replication checkpoints are signaling mechanisms that regulate and coordinate cellular responses to genotoxic conditions. The...
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Survey of Enzymological Data on ODCase
OMP decarboxylase (ODCase) has been the subject of enzymological, structural, and theoretical studies for several decades, yet its highly proficient...
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Introduction: Regulatory processes, an emerging feature in intracellular membrane traffic
The subject of this volume is the molecular mechanism of the intracellular membrane trafficking, a central eukaryotic cell biological process. In the...
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Biosynthesis and function of tRNA wobble modifications
Post-transcriptional modifications at the first (wobble) position of the tRNA anticodon participate in the precise decoding of the genetic code that...
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Taxonomy and phylogenetic diversity among the yeasts
Yeasts are among the economically and scientifically most important eukaryotic microorganisms known. At present, there are 1,500 recognized species,...
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Genome evolution: Lessons from Genolevures
In the past years, yeast genome-sequencing programs have been widely developed. Two of them, namely Genolevures I and II, were devoted to the...
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Scientific and technical challenges for systems biology
Systems biology is an emergent discipline, yet can be rooted back almost a century when pioneering thoughts on system-oriented views were discussed....
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Conserved ribosomal RNA modification and their putative roles in ribosome biogenesis and translation
rRNA maturation requires extensive covalent modifications of riboses and bases. These modifications concern exclusively the most conserved regions of...
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Biosynthesis and function of 1-methyladenosine in transfer RNA
Determining the function of single nucleotide modifications in tRNA has been elusive because so many tRNA modification enzymes are not essential for...
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From isolation to integration, a systems biology approach for building the Silicon Cell
In the last decade, the field now commonly referred to as systems biology has developed rapidly. With the sequencing of whole genomes and the...
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Adenosine to inosine RNA editing in animal cells
Major advances in the understanding of adenosine deaminases acting on RNA (ADARs) have come from the generation of ADAR mutant animals. In mice,...