Global Symmetry: Asymmetric - C1  Global Stoichiometry: Hetero 73-mer - AA1AB1AC1AD1AE1AF1AG1AH1AI1AJ1AK1AL1AM1AN1AO1AP1AQ1AR1AS1AT1AU1AV1AW1AX1AY1AZ1Aa1Ab1Ac1Ad1Ae1Af1Ag1Ah1Ai1Aj1Ak1Al1Am1An1Ao1Ap1Aq1Ar1As1At1Au1Av1Aw1Ax1Ay1Az1BA1BB1BC1BD1BE1BF1BG1BH1BI1BJ1BK1BL1BM1BN1BO1BP1BQ1BR1BS1BT1BU1 Find Similar Assemblies
Primary Citation of Related Structures:   3JBN, 3JBO, 3JBP
Plasmodium falciparum, the mosquito-transmitted Apicomplexan parasite, causes the most severe form of human malaria. In the asexual blood-stage, the parasite resides within erythrocytes where it proliferates, multiplies and finally spreads to new erythrocytes ...
Plasmodium falciparum, the mosquito-transmitted Apicomplexan parasite, causes the most severe form of human malaria. In the asexual blood-stage, the parasite resides within erythrocytes where it proliferates, multiplies and finally spreads to new erythrocytes. Development of drugs targeting the ribosome, the site of protein synthesis, requires specific knowledge of its structure and work cycle, and, critically, the ways they differ from those in the human host. Here, we present five cryo-electron microscopy (cryo-EM) reconstructions of ribosomes purified from P. falciparum blood-stage schizonts at sub-nanometer resolution. Atomic models were built from these density maps by flexible fitting. Significantly, our study has taken advantage of new capabilities of cryo-EM, in visualizing several structures co-existing in the sample at once, at a resolution sufficient for building atomic models. We have discovered structural and dynamic features that differentiate the ribosomes of P. falciparum from those of mammalian system. Prompted by the absence of RACK1 on the ribosome in our and an earlier study we confirmed that RACK1 does not specifically co-purify with the 80S fraction in schizonts. More extensive studies, using cryo-EM methodology, of translation in the parasite will provide structural knowledge that may lead to development of novel anti-malarials.
Cryo-EM structure of the Plasmodium falciparum 80S ribosome bound to the anti-protozoan drug emetine. Wong, W., Bai, X.C., Brown, A., Fernandez, I.S., Hanssen, E., Condron, M., Tan, Y.H., Baum, J., Scheres, S.H. (2014) Elife 3: --
Department of Biological Sciences, Columbia University, New York, NY 10027, USA Department of Biochemistry and Molecular Biophysics, Columbia University, New York, NY 10032, USA Howard Hughes Medical Institute, Columbia University, New York, NY 10032, USA firstname.lastname@example.org.