2y8r

From Proteopedia

(Difference between revisions)

Revision as of 10:45, 5 August 2016

CRYSTAL STRUCTURE OF APO AMA1 MUTANT (TYR230ALA) FROM TOXOPLASMA GONDII

Structural highlights

2y8r is a 4 chain structure with sequence from Toxgo. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Ligands:
Related:	2y8s, 2y8t
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

[AMA1_TOXGO] Essential microneme protein that plays an important role in host cell invasion. Part of the moving junction (MJ) complex, a ringlike structure formed between the plasma membranes of the apical tip of the parasite and the target host cell. During invasion, the MJ migrates from the anterior to the posterior of the parasite, leading to internalization of the parasite into a parasitophorous vacuole (PV).^[1] ^[2] ^[3] ^[4] ^[5] ^[6] ^[7] ^[8] ^[9]

Publication Abstract from PubMed

Apicomplexan parasites such as Toxoplasma gondii and Plasmodium species actively invade host cells through a moving junction (MJ) complex assembled at the parasite-host cell interface. MJ assembly is initiated by injection of parasite rhoptry neck proteins (RONs) into the host cell, where RON2 spans the membrane and functions as a receptor for apical membrane antigen 1 (AMA1) on the parasite. We have determined the structure of TgAMA1 complexed with a RON2 peptide at 1.95 angstrom resolution. A stepwise assembly mechanism results in an extensive buried surface area, enabling the MJ complex to resist the mechanical forces encountered during host cell invasion. Besides providing insights into host cell invasion by apicomplexan parasites, the structure offers a basis for designing therapeutics targeting these global pathogens.

Host cell invasion by apicomplexan parasites: insights from the co-structure of AMA1 with a RON2 peptide.,Tonkin ML, Roques M, Lamarque MH, Pugniere M, Douguet D, Crawford J, Lebrun M, Boulanger MJ Science. 2011 Jul 22;333(6041):463-7. PMID:21778402^[10]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

References

↑ Hehl AB, Lekutis C, Grigg ME, Bradley PJ, Dubremetz JF, Ortega-Barria E, Boothroyd JC. Toxoplasma gondii homologue of plasmodium apical membrane antigen 1 is involved in invasion of host cells. Infect Immun. 2000 Dec;68(12):7078-86. PMID:11083833
↑ Donahue CG, Carruthers VB, Gilk SD, Ward GE. The Toxoplasma homolog of Plasmodium apical membrane antigen-1 (AMA-1) is a microneme protein secreted in response to elevated intracellular calcium levels. Mol Biochem Parasitol. 2000 Nov;111(1):15-30. PMID:11087913
↑ Mital J, Meissner M, Soldati D, Ward GE. Conditional expression of Toxoplasma gondii apical membrane antigen-1 (TgAMA1) demonstrates that TgAMA1 plays a critical role in host cell invasion. Mol Biol Cell. 2005 Sep;16(9):4341-9. Epub 2005 Jul 6. PMID:16000372 doi:http://dx.doi.org/10.1091/mbc.E05-04-0281
↑ Howell SA, Hackett F, Jongco AM, Withers-Martinez C, Kim K, Carruthers VB, Blackman MJ. Distinct mechanisms govern proteolytic shedding of a key invasion protein in apicomplexan pathogens. Mol Microbiol. 2005 Sep;57(5):1342-56. PMID:16102004 doi:http://dx.doi.org/10.1111/j.1365-2958.2005.04772.x
↑ Alexander DL, Mital J, Ward GE, Bradley P, Boothroyd JC. Identification of the moving junction complex of Toxoplasma gondii: a collaboration between distinct secretory organelles. PLoS Pathog. 2005 Oct;1(2):e17. Epub 2005 Oct 21. PMID:16244709 doi:http://dx.doi.org/10.1371/journal.ppat.0010017
↑ Besteiro S, Michelin A, Poncet J, Dubremetz JF, Lebrun M. Export of a Toxoplasma gondii rhoptry neck protein complex at the host cell membrane to form the moving junction during invasion. PLoS Pathog. 2009 Feb;5(2):e1000309. doi: 10.1371/journal.ppat.1000309. Epub 2009, Feb 27. PMID:19247437 doi:http://dx.doi.org/10.1371/journal.ppat.1000309
↑ Buguliskis JS, Brossier F, Shuman J, Sibley LD. Rhomboid 4 (ROM4) affects the processing of surface adhesins and facilitates host cell invasion by Toxoplasma gondii. PLoS Pathog. 2010 Apr 22;6(4):e1000858. doi: 10.1371/journal.ppat.1000858. PMID:20421941 doi:http://dx.doi.org/10.1371/journal.ppat.1000858
↑ Santos JM, Ferguson DJ, Blackman MJ, Soldati-Favre D. Intramembrane cleavage of AMA1 triggers Toxoplasma to switch from an invasive to a replicative mode. Science. 2011 Jan 28;331(6016):473-7. doi: 10.1126/science.1199284. Epub 2010 Dec, 23. PMID:21205639 doi:http://dx.doi.org/10.1126/science.1199284
↑ Parussini F, Tang Q, Moin SM, Mital J, Urban S, Ward GE. Intramembrane proteolysis of Toxoplasma apical membrane antigen 1 facilitates host-cell invasion but is dispensable for replication. Proc Natl Acad Sci U S A. 2012 May 8;109(19):7463-8. doi:, 10.1073/pnas.1114661109. Epub 2012 Apr 20. PMID:22523242 doi:http://dx.doi.org/10.1073/pnas.1114661109
↑ Tonkin ML, Roques M, Lamarque MH, Pugniere M, Douguet D, Crawford J, Lebrun M, Boulanger MJ. Host cell invasion by apicomplexan parasites: insights from the co-structure of AMA1 with a RON2 peptide. Science. 2011 Jul 22;333(6041):463-7. PMID:21778402 doi:10.1126/science.1204988

1 Structural highlights
2 Function
3 Publication Abstract from PubMed
4 References

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/2y8r"

@@ Line 1: / Line 1: @@
 ==CRYSTAL STRUCTURE OF APO AMA1 MUTANT (TYR230ALA) FROM TOXOPLASMA GONDII==
 <StructureSection load='2y8r' size='340' side='right' caption='[[2y8r]], [[Resolution|resolution]] 2.45&Aring;' scene=''>
 == Structural highlights ==
-<table><tr><td colspan='2'>[[2y8r]] is a 4 chain structure with sequence from [http://en.wikipedia.org/wiki/Toxoplasma_gondii Toxoplasma gondii]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2Y8R OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2Y8R FirstGlance]. <br>
+<table><tr><td colspan='2'>[[2y8r]] is a 4 chain structure with sequence from [http://en.wikipedia.org/wiki/Toxgo Toxgo]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2Y8R OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2Y8R FirstGlance]. <br>
 </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=NAG:N-ACETYL-D-GLUCOSAMINE'>NAG</scene></td></tr>
 <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[2y8s|2y8s]], [[2y8t|2y8t]]</td></tr>
-<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2y8r FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2y8r OCA], [http://www.rcsb.org/pdb/explore.do?structureId=2y8r RCSB], [http://www.ebi.ac.uk/pdbsum/2y8r PDBsum]</span></td></tr>
+<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2y8r FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2y8r OCA], [http://pdbe.org/2y8r PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=2y8r RCSB], [http://www.ebi.ac.uk/pdbsum/2y8r PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=2y8r ProSAT]</span></td></tr>
 </table>
+== Function ==
+[[http://www.uniprot.org/uniprot/AMA1_TOXGO AMA1_TOXGO]] Essential microneme protein that plays an important role in host cell invasion. Part of the moving junction (MJ) complex, a ringlike structure formed between the plasma membranes of the apical tip of the parasite and the target host cell. During invasion, the MJ migrates from the anterior to the posterior of the parasite, leading to internalization of the parasite into a parasitophorous vacuole (PV).<ref>PMID:11083833</ref> <ref>PMID:11087913</ref> <ref>PMID:16000372</ref> <ref>PMID:16102004</ref> <ref>PMID:16244709</ref> <ref>PMID:19247437</ref> <ref>PMID:20421941</ref> <ref>PMID:21205639</ref> <ref>PMID:22523242</ref>
 <div style="background-color:#fffaf0;">
 == Publication Abstract from PubMed ==
@@ Line 15: / Line 18: @@
 From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
 </div>
+<div class="pdbe-citations 2y8r" style="background-color:#fffaf0;"></div>
 == References ==
 <references/>
 __TOC__
 </StructureSection>
-[[Category: Toxoplasma gondii]]
+[[Category: Toxgo]]
 [[Category: Boulanger, M J]]
 [[Category: Crawford, J]]

2y8r

From Proteopedia

Revision as of 10:45, 5 August 2016

CRYSTAL STRUCTURE OF APO AMA1 MUTANT (TYR230ALA) FROM TOXOPLASMA GONDII

Structural highlights

Function

Publication Abstract from PubMed

References

Contents

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