THE HUMAN PROTEIN ATLAS BLOG
A new study by researchers within the Human Protein Atlas project was just published in Autoimmunity .
The researchers analyzed the presence of autoantibodies in patients with vaccine-associated narcolepsy. In an initial screening, IgG reactivity to approximately 10000 protein fragments was investigated, revealing a large heterogeneity in which autoantibodies that are present in different individuals.
Anna Häggmark is the first author of the paper...Read more
Welcome to another HPA image of the week! This week we take a look at vesicles and another type of data present in the HPA.
The protein stained in Fig 1. is an image of RAB5C. This protein is found in vesicles and specifically, in lysosomes of the cell. This sample shows HeLa human cervical adenocarcinoma cells.
These cells are actually transgenic and made to express green fluorescent protein on the RAB5C protein (RAB5Cgfp). This is a method we use to check the validity of our antibodies...Read more
In a recent publication in European Journal of Allergy and Clinical Immunology, researchers use an affinity proteomics approach to analyze plasma profiles of a 362 proteins in 154 children with persistent or intermittent asthma and controls. To this end, antibody suspension bead arrays developed within the Human Protein Atlas was used.
Asthma is a common chronic childhood disease with many different phenotypes that need to be identified. Asthma affects approximately 300 million people worldwide and is characterized by bronchial hyperresponsiveness and reversible expiratory airflow limitation...Read more
Welcome to another HPA image of the week! This week's image was brought to us by citizen scientists in Project Discovery, and specifically by Shiverwarp who found this image while playing Project Discovery in EVE online.
The protein stained in Fig 1. is an image of Coronin, actin binding protein, 2B (CORO2B) found in the focal adhesions and at the plasma membrane of the cell. This sample shows U-251 MG human glioblastoma astrocytoma (brain) cells.
Focal adhesions are transmembrane groups of protein that allow the cell to "grab" the surrounding environment...Read more
Time has come for the second interview with a researcher within the Human Protein Atlas project. Today we meet Cecilia Lindskog, site director of the Tissue Atlas.
– I have a Master of Science in Biomedicine and a Doctor of Philosophy in pathology from the Faculty of Medicine, Uppsala University. I joined the Human Protein Atlas project in 2006, and also have industry experience in the biotechnology industry, from Oncomark Ltd, Dublin, Ireland.
Cecilia Lindskog´s main research interests have always been understanding the biology and functions of different organs, and the underlying mechanisms leading to cancer and other diseases...Read more
Welcome to another HPA image of the week! This week's image was brought to us by citizen scientists in Project Discovery, and specifically by Selphentine who pointed out several nice examples of proteins localized to "nuclear speckles". In Project Discovery, citizen scientists are refining our annotations for proteins within the nucleus by labeling these nuclear speckles, previously not annotated in the atlas.
The protein stained in Fig 1. is an image of DEAD (Asp-Glu-Ala-Asp) box polypeptide 39B (DDX39B) seen in the nuclear speckles. This sample shows MCF-7 cells, a human adenocarcinoma cell line from breast cancer...Read more
In a very recent paper in Journal of Histochemistry and Cytochemistry , with researchers from the Human Protein Atlas, it is shown that the expression of aquaporin 9 is limited in normal tissues, and high membranous expression is observed only in hepatocytes.
Aquaporin 9 is known to facilitate hepatocyte glycerol uptake. Murine aquaporin 9 protein expression has been verified in liver, skin, epididymis, epidermis and neuronal cells using knockout mice.
One goal of the current study was to systematically explore the distribution of aquaporin 9 expression in humans...Read more
This week HPA image of the week, I've decided to highlight two of my favorite things, the cell cycle and actin filaments!
The protein labeled in Fig 1. is an image of Cell division cycle 42 effector protein (Rho GTPase binding) 4 (CDC42EP4). In addition to being quite a mouthful, this protein resides in the cytoplasm and is associated with the actin filaments. In this image, CDC42EP4 is seen in U-2 OS human osteosarcoma cells.
As the name suggests, the CDC42EP4 is a protein associated with CDC42, which helps regulate the transition from G1 to S (in which DNA is replicated), and is essential for proper cell cycle progression (Yasuda S et al. 2006)...Read more
As a follow up from last week´s blog post, on Jan Mulder and his work, we now present the most recent publication from his lab, on the anatomical distribution of neuronal calcium-binding proteins 1 and 2 (NECAB1/2) in rodent and human spinal cord.
Mingdong Zhang is the first author of the study and a PhD student registered in the Division of Molecular Neurobiology, Department of Medical Biochemistry and Biophysics (MBB) at Karolinska Institutet.
– But much of my actual work is carried out in the Department of Neuroscience...Read more