The BCC7 Protein Contributes to the Toxoplasma Basal Pole by Interfacing between the MyoC Motor and the IMC Membrane Network

is a eukaryotic parasite that has evolved a stage called tachyzoite which multiplies in host cells by producing two daughter cells internally. These nascent tachyzoites bud off their mother and repeat the division process until the expanding progenies escape to settle and multiply in other host cell...

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Bibliographic Details
Published in:International journal of molecular sciences 2022-05, Vol.23 (11), p.5995
Main Authors: Vigetti, Luis, Labouré, Tatiana, Roumégous, Chloé, Cannella, Dominique, Touquet, Bastien, Mayer, Claudine, Couté, Yohann, Frénal, Karine, Tardieux, Isabelle, Renesto, Patricia
Format: Article
Language:English
Subjects:
Apicomplexa parasites
Bacteriology
basal pole complex
Binding sites
Biochemistry, Molecular Biology
Biomechanics
Biosynthesis
cell biogenesis
Cell Division
cell polarity
Cytoskeleton
Fluorescence
Life Sciences
Localization
Mechanical properties
Membranes
Microbiology and Parasitology
Myosin
Myosins - metabolism
Plaques
Proteins
Proteomics
Protozoan Proteins - genetics
Protozoan Proteins - metabolism
Structural Biology
Tachyzoites
Toxoplasma - metabolism
Toxoplasma gondii
Virology
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Summary:is a eukaryotic parasite that has evolved a stage called tachyzoite which multiplies in host cells by producing two daughter cells internally. These nascent tachyzoites bud off their mother and repeat the division process until the expanding progenies escape to settle and multiply in other host cells. Over these intra- and extra-cellular phases, the tachyzoite maintains an essential apicobasal polarity that emerges through a unique bidirectional budding process of the elongating cells. This process requires the assembly of several molecular complexes that, at the nascent pole, encompass structural and myosin motor elements. To characterize a recently identified basal pole marker named BCC7 with respect to the posterior myosin J and myosin C motors, we used conventional biochemistry as well as advanced proteomic and in silico analysis in conjunction with live and super resolution microscopy of transgenic fluorescent tachyzoites. We document that BCC7 forms a ribbed ring below which myosin C motor entities distribute regularly. In addition, we identified-among 13 BCC7 putative partners-two novel and five known members of the inner membrane complex (IMC) family which ends at the apical side of the ring. Therefore, BCC7 could assist the stabilization of the IMC plaques and contribute to the parasite biomechanical properties.
ISSN:1422-0067
1661-6596
1422-0067
DOI:10.3390/ijms23115995