Tissue-specific protein expression in human cells, tissues and organs

• An important part of understanding human biology is the study of tissue-specific expression both at the gene and protein level. In this study, the analysis of tissue specific protein expression was performed based on tissue micro array data available on the public Human Protein Atlas database (www.proteinatlas.org). An analysis of human proteins, corresponding to approximately one third of the protein-encoding genes, was carried out in 65 human tissues and cell types. The spatial distribution and relative abundance of 6,678 human proteins, were analyzed in different cell populations from various organs and tissues in the human body using unsupervised methods, such as hierarchical clustering and principal component analysis, as well as with supervised methods (Breiman, 2001). Well-known markers, such as neuromodulin for the central nervous system, keratin 20 for gastrointestinal tract and CD45 for hematopoietic cells, were identified as tissue-specific. Proteins expressed in a tissue-specific manner were identified for cells in all of the investigated tissues, including the central nervous system, hematopoietic system, squamous epithelium, mesenchymal cells and cells from the gastrointestinal tract. Several proteins not yet associated with tissue-specificity were identified, providing starting points for further studies to explore tissue-specific functions. This includes proteins with no known function, such as ZNF509 expressed in CNS and C1orf201 expressed in the gastro-intestinal tract. In general, the majority of the gene products are expressed in a ubiquitous manner and few proteins are detected exclusively in cells from a particular tissue class, as exemplified by less than 1% of the analyzed proteins found only in the brain.

Ämnesord

NATURVETENSKAP  -- Biologi -- Bioinformatik och systembiologi (hsv//swe)

NATURAL SCIENCES  -- Biological Sciences -- Bioinformatics and Systems Biology (hsv//eng)

MEDICIN OCH HÄLSOVETENSKAP  -- Medicinska och farmaceutiska grundvetenskaper -- Cell- och molekylärbiologi (hsv//swe)

MEDICAL AND HEALTH SCIENCES  -- Basic Medicine -- Cell and Molecular Biology (hsv//eng)

Nyckelord

C1orf201 protein

cadherin 17

CD45 antigen

cytokeratin 1

cytokeratin 14

cytokeratin 20

cytokeratin 36

desmin

ELAVL4 proten

emelin

excitatory amino acid transporter 1

neuromodulin

protein

unclassified drug

ZNF509 protein

Pathology

Patologi

Publikations- och innehållstyp

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