Abstract:
:Compartmentalization of proteins into subcellular organelles in eukaryotic cells is a fundamental mechanism of regulating complex cellular functions. Many proteins of Plasmodium falciparum merozoites involved in invasion are compartmentalized into apical organelles. We have identified a new merozoite organelle that contains P. falciparum rhomboid-1 (PfROM1), a protease that cleaves the transmembrane regions of proteins involved in invasion. By immunoconfocal microscopy, PfROM1 was localized to a single, thread-like structure on one side of the merozoites that appears to be in close proximity to the subpellicular microtubules. PfROM1 was not found associated with micronemes, rhoptries, or dense granules, the three identified secretory organelles of invasion. Release of merozoites from schizonts resulted in the movement of PfROM1 from the lateral asymmetric localization to the merozoite apical pole and the posterior pole. We have named this single thread-like organelle in merozoites, the mononeme.
journal_name
Proc Natl Acad Sci U S Aauthors
Singh S,Plassmeyer M,Gaur D,Miller LHdoi
10.1073/pnas.0709999104subject
Has Abstractpub_date
2007-12-11 00:00:00pages
20043-8issue
50eissn
0027-8424issn
1091-6490pii
0709999104journal_volume
104pub_type
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