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Novel asymmetrically localizing components of human centrosomes identified by complementary proteomics methods
KTH, Centra, Science for Life Laboratory, SciLifeLab.ORCID-id: 0000-0002-2998-3077
Vise andre og tillknytning
2011 (engelsk)Inngår i: EMBO Journal, ISSN 0261-4189, E-ISSN 1460-2075, Vol. 30, nr 8, s. 1520-1535Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Centrosomes in animal cells are dynamic organelles with a proteinaceous matrix of pericentriolar material assembled around a pair of centrioles. They organize the microtubule cytoskeleton and the mitotic spindle apparatus. Mature centrioles are essential for biogenesis of primary cilia that mediate key signalling events. Despite recent advances, the molecular basis for the plethora of processes coordinated by centrosomes is not fully understood. We have combined protein identification and localization, using PCP-SILAC mass spectrometry, BAC transgeneOmics, and antibodies to define the constituents of human centrosomes. From a background of non-specific proteins, we distinguished 126 known and 40 candidate centrosomal proteins, of which 22 were confirmed as novel components. An antibody screen covering 4000 genes revealed an additional 113 candidates. We illustrate the power of our methods by identifying a novel set of five proteins preferentially associated with mother or daughter centrioles, comprising genes implicated in cell polarity. Pulsed labelling demonstrates a remarkable variation in the stability of centrosomal protein complexes. These spatiotemporal proteomics data provide leads to the further functional characterization of centrosomal proteins.

sted, utgiver, år, opplag, sider
2011. Vol. 30, nr 8, s. 1520-1535
Emneord [en]
centrosome, mass spectrometry-based proteomics, mother and daughter centriole, protein turnover, SILAC
HSV kategori
Identifikatorer
URN: urn:nbn:se:kth:diva-33978DOI: 10.1038/emboj.2011.63ISI: 000290306300013Scopus ID: 2-s2.0-79955009072OAI: oai:DiVA.org:kth-33978DiVA, id: diva2:419919
Forskningsfinansiär
Science for Life Laboratory - a national resource center for high-throughput molecular bioscience
Merknad
QC 20110530Tilgjengelig fra: 2011-05-30 Laget: 2011-05-23 Sist oppdatert: 2018-01-12bibliografisk kontrollert

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