The life cycle of the peroxisome View Full Text


Ontology type: schema:ScholarlyArticle     


Article Info

DATE

2001-05

AUTHORS

Vladimir I. Titorenko, Richard A. Rachubinski

ABSTRACT

Key Points Like the Golgi apparatus, the population of peroxisomes in a cell consists of structurally and functionally distinct subcompartments (subforms) that are related through the ordered conversion of one subform to another. The import of a limited subset of peroxisomal membrane proteins commits a specialized preperoxisomal endomembrane to become the earliest peroxisomal precursor (nascent peroxisome). Nascent peroxisomes can import another subset of membrane proteins and the bulk of matrix proteins, and they eventually mature into functional peroxisomes in a multistep process. In yeast and plant cells, the endoplasmic reticulum, might serve as the preperoxisomal endomembrane. The nature of the preperoxisomal endomembrane is under debate. In human cells, a preperoxisomal endomembrane might exist as an autonomous vesicular structure. Many soluble and membrane-associated components of the peroxisomal machineries specific for the import of membrane and matrix proteins have been identified. These import machineries probably assemble in a temporally and spatially ordered manner in distinct intermediates along the peroxisome assembly pathway. Whereas only unfolded, monomeric proteins can be translocated across the endoplasmic reticulum and mitochondrial membranes, the machinery for the import of matrix proteins can translocate completely folded polypeptides and oligomeric proteins across the peroxisomal membrane. Peroxisomes undergo both constitutive (independent of extracellular stimuli) division during mitosis and regulated division induced in response to some external signal. A specific subset of peroxins coordinates the growth and regulated division of peroxisomes. More... »

PAGES

357-368

Identifiers

URI

http://scigraph.springernature.com/pub.10.1038/35073063

DOI

http://dx.doi.org/10.1038/35073063

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1033819938

PUBMED

https://www.ncbi.nlm.nih.gov/pubmed/11331910


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