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Proteomics01:33

Proteomics

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A proteome is the entire set of proteins that a cell type produces. We can study proteomes using the knowledge of genomes because genes code for mRNAs, and the mRNAs encode proteins. Although mRNA analysis is a step in the right direction, not all mRNAs are translated into proteins.
Proteomics is the study of proteomes' function. It involves the large-scale systematic study of the proteome to denote the protein complement expressed by a genome. Scientist Mark Wilkins coined the term...
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Protein Networks02:26

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An organism can have thousands of different proteins, and these proteins must cooperate to ensure the health of an organism. Proteins bind to other proteins and form complexes to carry out their functions. Many proteins interact with multiple other proteins creating a complex network of protein interactions.
These interactions can be represented through maps depicting protein-protein interaction networks, represented as nodes and edges. Nodes are circles that are representative of a protein,...
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Proteins are polymers of amino acid residues. They are versatile and responsible for different cellular functions, including DNA replication, molecular transport, catalysis, and structural support. Proteins have a hierarchical structure comprising at least three levels of organization: primary, secondary, and tertiary structure. Some large proteins have a quaternary structure where individual protein subunits are linked together.
The primary structure of a protein is its amino acid sequence....
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Mass Spectrometry-Based Proteomics Analyses Using the OpenProt Database to Unveil Novel Proteins Translated from Non-Canonical Open Reading Frames
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Un borrador del mapa del proteoma humano.

Min-Sik Kim1, Sneha M Pinto2, Derese Getnet3

  • 11] McKusick-Nathans Institute of Genetic Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland 21205, USA [2] Department of Biological Chemistry, Johns Hopkins University School of Medicine, Baltimore, Maryland 21205, USA.

Nature
|May 30, 2014
PubMed
Resumen

Los investigadores crearon un mapa del proteoma humano utilizando espectrometría de masas, identificando proteínas de 17.294 genes. Este mapa integral de proteínas ayuda a la investigación biomédica en salud y enfermedad.

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Área de la Ciencia:

  • La proteómica es la proteómica.
  • La genómica es la genómica.
  • Investigación biomédica en la investigación biomédica.

Sus antecedentes:

  • La secuencia del genoma humano está disponible, pero falta un mapa integral del proteoma humano con mediciones directas de proteínas.
  • Esta brecha dificulta una comprensión completa de los procesos biológicos en la salud y la enfermedad.

Objetivo del estudio:

  • Para crear un borrador del mapa del proteoma humano.
  • Identificar proteínas y nuevas regiones codificadoras de proteínas utilizando técnicas proteómicas avanzadas.

Principales métodos:

  • Se empleó la espectrometría de masas de la transformada de Fourier de alta resolución para el perfil proteómico en profundidad.
  • El análisis incluyó 30 muestras humanas histológicamente normales en varios tipos de tejidos y poblaciones celulares.
  • Se utilizó una estrategia de análisis proteogenómico.

Principales resultados:

  • Identificación de proteínas codificadas por 17.294 genes, lo que representa aproximadamente el 84% de los genes codificadores de proteínas anotados.
  • Descubrimiento de nuevas regiones codificadoras de proteínas, incluidos pseudogenes traducidos, ARN no codificantes y marcos de lectura abierta aguas arriba.
  • Desarrollo de un catálogo completo del proteoma humano disponible como recurso web.

Conclusiones:

  • El mapa desarrollado del proteoma humano avanza significativamente en nuestra comprensión de la biología humana.
  • Este recurso complementa los datos genómicos y transcriptómicos existentes.
  • Se espera que acelere la investigación biomédica y el estudio de las enfermedades.