2XF1

Crystal structure of Plasmodium falciparum actin depolymerization factor 1

Summary for 2XF1

• Entry DOI: 10.2210/pdb2xf1/pdb
• Descriptor: COFILIN ACTIN-DEPOLYMERIZING FACTOR HOMOLOG 1, SULFATE ION (3 entities in total)
• Functional Keywords: actin-binding protein, cytoskeleton
• Biological source: PLASMODIUM FALCIPARUM
• Total number of polymer chains: 1
• Total formula weight: 14568.53

Authors

Singh, B.K.,Sattler, J.M.,Huttu, J.,Chatterjee, M.,Schueler, H.,Kursula, I. (deposition date: 2010-05-20, release date: 2011-06-15, Last modification date: 2024-11-20)

Primary citation

Singh, B.K.,Sattler, J.M.,Chatterjee, M.,Huttu, J.,Schuler, H.,Kursula, I.
Crystal Structures Explain Functional Differences in the Two Actin Depolymerization Factors of the Malaria Parasite.
J.Biol.Chem., 286:28256-, 2011

PubMed Abstract: Apicomplexan parasites, such as the malaria-causing Plasmodium, utilize an actin-based motor for motility and host cell invasion. The actin filaments of these parasites are unusually short, and actin polymerization is under strict control of a small set of regulatory proteins, which are poorly conserved with their mammalian orthologs. Actin depolymerization factors (ADFs) are among the most important actin regulators, affecting the rates of filament turnover in a multifaceted manner. Plasmodium has two ADFs that display low sequence homology with each other and with the higher eukaryotic family members. Here, we show that ADF2, like canonical ADF proteins but unlike ADF1, binds to both globular and filamentous actin, severing filaments and inducing nucleotide exchange on the actin monomer. The crystal structure of Plasmodium ADF1 shows major differences from the ADF consensus, explaining the lack of F-actin binding. Plasmodium ADF2 structurally resembles the canonical members of the ADF/cofilin family.

PubMed: 21832095
DOI: 10.1074/JBC.M111.211730

Experimental method

X-RAY DIFFRACTION (1.96 Å)