A study led by Emma Lundberg* presents an extensive work  on the intra cellular localization of thousands of human proteins. The team generated more than 300,000 images to systematically resolve the spatial distribution of human proteins in cultivated cell lines.

Here is the abstract of this article, published in Science:

Resolving the spatial distribution of the human proteome at a subcellular level greatly increases our understanding of human biology and disease. Here, we present a comprehensive image-based map of the subcellular protein distribution, the Cell Atlas, built by integrating transcriptomics and antibody-based immunofluorescence microscopy with validation by mass spectrometry. Mapping the in situ localization of 12,003 human proteins at a single-cell level to 30 subcellular structures enabled the definition of 13 major organelle proteomes. Exploration of the proteomes reveals single-cell variations of abundance or spatial distribution, and localization of approximately half of the proteins to multiple compartments. This subcellular map can be used to refine existing protein-protein interaction networks and provides an important resource to deconvolute the highly complex architecture of the human cell.

The Cell Atlas is an open access resource: everybody can explore it !

*Emma Lundberg is associate professor at KTH Royal Institute of Technology and responsible for the High Content Microscopy facility at the Science for Life Laboratory (SciLifeLab) in Stockholm, Sweden.

Thomas Kirchhausen, Eric Betzig et al. publish an article in Sciences about SIM (structured illumination microscopy) and the observation of moving molecules inside cells. The incredible spatial and time resolution give the opportunity to see for exemple proteins which pass the cell membrane.

On the surface of a living cell at any given time, hundreds of tiny bubbles are popping into existence, surrounding and incorporating proteins, hormones, fats, and the occasional bacteria or virus. But until now the details of this activity were inferred – you couldn’t actually see it.

Li et. al., “Extended Resolution Structured Illumination Imaging of Endocytic and Cytoskeletal Dynamics,” Science.

Source : New Instrument Captures the Secret Lives of Cells – technologyreview.com

Aditional informations : Imaging Techniques Set a New Standard for Super-Resolution in Live Cells

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