Dataset Information

P falciparum Pf377 protein complex in gametocytes

ABSTRACT: The identification of Pf377 interacting proteins in the osmiophilic bodies in P. falciparum gametocytes. In a comparative proteomics approach, immunopurified Pfg377 complexes were obtained in wild type and Osmiophilic Body -depleted gametocytes (Pf377 knock out gametocytes) and were analyzed by LC-MS/MS to identify Pfg377 interaction partners in wt gametocytes as candidate for OB associated proteins.

INSTRUMENT(S): LTQ Orbitrap Velos

ORGANISM(S): Plasmodium Falciparum (isolate 3d7)

TISSUE(S): Blood Cell, Blood

DISEASE(S): Plasmodium Falciparum Malaria

SUBMITTER: Edwin Lasonder

LAB HEAD: Edwin Lasonder

PROVIDER: PXD004088 | Pride | 2018-10-26

REPOSITORIES: Pride

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Publications

Comparative Proteomics and Functional Analysis Reveal a Role of Plasmodium falciparum Osmiophilic Bodies in Malaria Parasite Transmission.

Suárez-Cortés Pablo P Sharma Vikram V Bertuccini Lucia L Costa Giulia G Bannerman Naa-Lamiley NL Sannella Anna Rosa AR Sannella Anna Rosa AR Williamson Kim K Klemba Michael M Levashina Elena A EA Lasonder Edwin E Alano Pietro P

Molecular & cellular proteomics : MCP 20160718 10

An essential step in the transmission of the malaria parasite to the Anopheles vector is the transformation of the mature gametocytes into gametes in the mosquito gut, where they egress from the erythrocytes and mate to produce a zygote, which matures into a motile ookinete. Osmiophilic bodies are electron dense secretory organelles of the female gametocytes which discharge their contents during gamete formation, suggestive of a role in gamete egress. Only one protein with no functional annotati ...[more]

PMID: 27432909

Similar Datasets

Project description:For malaria transmission, the parasite must undergo sexual differentiation into mature gametocytes. However, the molecular basis for this critical transition in the parasites life cycle is unknown. Six previously uncharacterized genes, Pfg14.744, Pfg14.745, Pfg14.748, Pfg14.763, Pfg14.752 and Pfg6.6 that are members of a 36 gene Plasmodium falciparum-specific subtelomeric superfamily were found to be expressed in parasites that are committed to sexual development as suggested by co-expression of Pfs16 and Pfg27. Northern blots demonstrated that Pfg14.744 and Pfg14.748 were first expressed before the parasites differentiated into morphologically distinct gametocytes, transcription continued to increase until stage II gametocytes were formed and then rapidly decreased. Immunofluorescence assays indicated that both proteins were only produced in the subpopulation of ring stage parasites that are committed to gametocytogenesis and both localized to the parasitophorous vacuole (PV)b of the early ring stage parasites. As the parasites continued to develop Pfg14.748 remained within the parasitophorous vacuole, while Pfg14.744 was detected in the erythrocyte. The 5' flanking region of either gene alone was sufficient to drive early gametocyte specific expression of green fluorescent protein (GFP). In parasites transfected with a plasmid containing the Pfg14.748 5' flanking region immediately upstream of GFP, fluorescence was observed in a small number of schizonts the cycle before stage I gametocytes were observed. This expression pattern is consistent with commitment to sexual differentiation prior to merozoite release and erythrocyte invasion. Further investigation into the role of these genes in the transition from asexual to sexual differentiation could provide new strategies to block malaria transmission. Microarray analysis was used to compare two clones derived from Plasmodium falciparum strain 3D7 parasites that differ in their ability to undergo gametocytogenesis. Clone G+ produces gametocytes and clone G- produces very few if any gametocytes. RNA was harvested from the cultures when the asexual parasitemia was 0.9-1.48% (day 4) (n=4) after setting up the gametocyte cultures and 5.2-5.58% (day 6) (n=4) prior to the appearance of morphologically distinct gametocytes and used to generate cDNA that was labeled with Cy3 or Cy5 and hybridized to the Plasmodium falciparum 70 mer oligonucleotide microarray developed by DeRisi and co-workers.

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