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viral networks
viral networks

... http://www.dnatube.com/video/993/Plasmid• Only need the sequenced genome (or sequence of Cloning interest) • Scalable, its possible to screen for interactions among many proteins creating a more high-throughput screen (ex. viral genome) • Protein/polypeptides can be from various sources; eukaryotes, ...
The DNA Structure
The DNA Structure

... created single gene mutations that incapacitated specific enzymes, so that the molds with these mutations required an external supply of the substance that the enzyme normally produced, and the substance that the enzyme normally used, piled up in the cell • These results confirmed their one geneone ...
argC Orthologs from Rhizobiales Show Diverse Profiles of
argC Orthologs from Rhizobiales Show Diverse Profiles of

... loti). The argC gene is necessary for the synthesis of arginine, an amino acid that is central to protein and cellular metabolism. Strains were obtained carrying plasmids with argC orthologs expressed under the speB and argC (S. meliloti) and lac (Escherichia coli) promoters. Complementation analysi ...
domain_searching.pdf
domain_searching.pdf

... Humans have 1.8 times as many protein architectures as fly or worm and 5.8 times as many as yeast. The increase in protein architectures is particularly evident in the development of new extracellular and transmembrane architectures. ...
Bovine prolactin soluble receptor ECD ECD-11
Bovine prolactin soluble receptor ECD ECD-11

... and reproduction. The initial step in its action is the binding to a specific membrane receptor (prolactin receptor) which belongs to the superfamily of class 1 cytokine receptors. Prolactin (PRL) is a hormone involved in a variety of important functions including ion transport and osmoregulation, s ...
chapter 6
chapter 6

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Bioinformatics: Integrative Analyses of Genome
Bioinformatics: Integrative Analyses of Genome

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Toward a New Theoretical Framework for Biology

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and y-crystallin X - Prof. N. Srinivasan
and y-crystallin X - Prof. N. Srinivasan

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Chapter 12 Lecture Notes: The Nature of the Gene I. How genes
Chapter 12 Lecture Notes: The Nature of the Gene I. How genes

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tpj12930-sup-0001-FigS1
tpj12930-sup-0001-FigS1

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... macromolecules to form complex polysaccharides:  Glycoproteins: polysaccharides + proteins  Glycolipids: polysaccharides + lipids  Cellular functions  Cell-surface receptor molecules; typically reside on external surfaces of the membrane  Glycolipids important in cell walls of gram-negative bac ...
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The samples were dissolved in 25 µL of 100 mM ammonium
The samples were dissolved in 25 µL of 100 mM ammonium

... Each sample was split equally (10 µL/tube) into 2 tubes. One sample was digested with trypsin and the other tube was digested with LysC. The digestion protocol was the same for both enzymes and involved first diluting the sample 1:1 with 2,2,2-trifluoroethanol, then reducing with DTT at 90°C for 20 ...
DNA AND PROTEIN SYNTHESIS
DNA AND PROTEIN SYNTHESIS

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Biology II – Chapter 9: DNA: The Molecule of Heredity
Biology II – Chapter 9: DNA: The Molecule of Heredity

... o A single faulty gene may be more serious because all of the proteins synthesized according to the base sequence will be defective o Mutations that occur in gamete cells can be passed on to future generations if not lethal. o 4 Types of Mutation:  Point Mutation – or nucleotide substitution – when ...
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... patterns silence gene transcription, leading to reduced levels of FMR-1 protein. II. Most Complex Heritable Phenotypes in Humans are Multigenic. Multigenic includes both oligogenic and polygenic traits. An oligogenic trait or disorder is determined by a small number of genes, each contributing to th ...
Enzyme Units FAQ
Enzyme Units FAQ

... An enzyme is usually valued for its function and activity rather than its mass, therefore enzyme units serve as a quantification of enzyme activity. For many enzymes, the activity under specified conditions can be expressed in International Units (IU), which is defined as the amount of enzyme that c ...
Chapter 3 Presentation: Macromolecules
Chapter 3 Presentation: Macromolecules

... • The secondary structure of the polypeptide is the coiled and/or folded patterns that emerges as the amino acids begin to interact with one another (H-bonds) not from the R-groups, but from the backbones of the amino acids. ...
Télécharger la version pdf
Télécharger la version pdf

... photosynthesis. To this end, plants and algae use internal cell structures called chloroplasts, which are equipped with protein complexes, the photosystems. If certain nutrients are missing, such as iron, the alga temporarily dismantles its photosystems to recycle some of their components. Researche ...
Heterologous Protein Production in Eukaryotic Cells
Heterologous Protein Production in Eukaryotic Cells

... Strain containing particular marker (LEU) is auxotropic for Leu. This strain carries a mutation inactivating isopropylmalate dehydrogenase that renders it unable to synthesize leucine and will only be able to grow if Leu can be taken up from the medium during cultivation. ...
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Protein moonlighting



Protein moonlighting (or gene sharing) is a phenomenon by which a protein can perform more than one function. Ancestral moonlighting proteins originally possessed a single function but through evolution, acquired additional functions. Many proteins that moonlight are enzymes; others are receptors, ion channels or chaperones. The most common primary function of moonlighting proteins is enzymatic catalysis, but these enzymes have acquired secondary non-enzymatic roles. Some examples of functions of moonlighting proteins secondary to catalysis include signal transduction, transcriptional regulation, apoptosis, motility, and structural.Protein moonlighting may occur widely in nature. Protein moonlighting through gene sharing differs from the use of a single gene to generate different proteins by alternative RNA splicing, DNA rearrangement, or post-translational processing. It is also different from multifunctionality of the protein, in which the protein has multiple domains, each serving a different function. Protein moonlighting by gene sharing means that a gene may acquire and maintain a second function without gene duplication and without loss of the primary function. Such genes are under two or more entirely different selective constraints.Various techniques have been used to reveal moonlighting functions in proteins. The detection of a protein in unexpected locations within cells, cell types, or tissues may suggest that a protein has a moonlighting function. Furthermore, sequence or structure homology of a protein may be used to infer both primary function as well as secondary moonlighting functions of a protein.The most well-studied examples of gene sharing are crystallins. These proteins, when expressed at low levels in many tissues function as enzymes, but when expressed at high levels in eye tissue, become densely packed and thus form lenses. While the recognition of gene sharing is relatively recent—the term was coined in 1988, after crystallins in chickens and ducks were found to be identical to separately identified enzymes—recent studies have found many examples throughout the living world. Joram Piatigorsky has suggested that many or all proteins exhibit gene sharing to some extent, and that gene sharing is a key aspect of molecular evolution. The genes encoding crystallins must maintain sequences for catalytic function and transparency maintenance function.Inappropriate moonlighting is a contributing factor in some genetic diseases, and moonlighting provides a possible mechanism by which bacteria may become resistant to antibiotics.
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