1r9b: Difference between revisions
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==3D-STRUCTURE PREDICTION OF THE CLP CORE ASSOCIATED PLASTID PROTEIN CLPS2 FROM ARABIDOPSIS THALIANA, USING THE CRYSTAL STRUCTURE OF THE N-TERMINAL DOMAIN OF E. COLI CLPA (1K6K)== | |||
<StructureSection load='1r9b' size='340' side='right'caption='[[1r9b]]' scene=''> | |||
== Structural highlights == | |||
or the | <table><tr><td colspan='2'>For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1R9B FirstGlance]. <br> | ||
</td></tr><tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=1r9b FirstGlance], [https://www.ebi.ac.uk/pdbsum/1r9b PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1r9b ProSAT]</span></td></tr> | |||
</table> | |||
<div style="background-color:#fffaf0;"> | |||
== Publication Abstract from PubMed == | |||
Tetradecameric Clp protease core complexes in non-photosynthetic plastids of roots, flower petals, and in chloroplasts of leaves of Arabidopsis thaliana were purified based on native mass and isoelectric point and identified by mass spectrometry. The stoichiometry between the subunits was determined. The protease complex consisted of one to three copies of five different serine-type protease Clp proteins (ClpP1,3-6) and four non-proteolytic ClpR proteins (ClpR1-4). Three-dimensional homology modeling showed that the ClpP/R proteins fit well together in a tetradecameric complex and also indicated unique contributions for each protein. Lateral exit gates for proteolysis products are proposed. In addition, ClpS1,2, unique to land plants, tightly interacted with this core complex, with one copy of each per complex. The three-dimensional modeling show that they do fit well on the axial sites of the ClpPR cores. In contrast to plastids, plant mitochondria contained a single approximately 320-kDa homo-tetradecameric ClpP2 complex, without association of ClpR or ClpS proteins. It is surprising that the Clp core composition appears identical in all three plastid types, despite the remarkable differences in plastid proteome composition. This suggests that regulation of plastid proteolysis by the Clp machinery is not through differential regulation of ClpP/R/S gene expression, but rather through substrate recognition mechanisms and regulated interaction of chaperone-like molecules (ClpS1,2 and others) to the ClpP/R core. | |||
Clp protease complexes from photosynthetic and non-photosynthetic plastids and mitochondria of plants, their predicted three-dimensional structures, and functional implications.,Peltier JB, Ripoll DR, Friso G, Rudella A, Cai Y, Ytterberg J, Giacomelli L, Pillardy J, van Wijk KJ J Biol Chem. 2004 Feb 6;279(6):4768-81. Epub 2003 Oct 30. PMID:14593120<ref>PMID:14593120</ref> | |||
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |||
</div> | |||
<div class="pdbe-citations 1r9b" style="background-color:#fffaf0;"></div> | |||
== References == | |||
<references/> | |||
__TOC__ | |||
</StructureSection> | |||
== | [[Category: Theoretical Model]] | ||
[[Category: Large Structures]] | |||
== | |||
< | |||
[[Category: Cai, Y]] | [[Category: Cai, Y]] | ||
[[Category: Friso, G]] | [[Category: Friso, G]] | ||
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[[Category: Van Wijk, K J]] | [[Category: Van Wijk, K J]] | ||
[[Category: Ytterberg, J]] | [[Category: Ytterberg, J]] | ||
Latest revision as of 13:10, 15 September 2021
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3D-STRUCTURE PREDICTION OF THE CLP CORE ASSOCIATED PLASTID PROTEIN CLPS2 FROM ARABIDOPSIS THALIANA, USING THE CRYSTAL STRUCTURE OF THE N-TERMINAL DOMAIN OF E. COLI CLPA (1K6K)3D-STRUCTURE PREDICTION OF THE CLP CORE ASSOCIATED PLASTID PROTEIN CLPS2 FROM ARABIDOPSIS THALIANA, USING THE CRYSTAL STRUCTURE OF THE N-TERMINAL DOMAIN OF E. COLI CLPA (1K6K)
Structural highlights
Publication Abstract from PubMedTetradecameric Clp protease core complexes in non-photosynthetic plastids of roots, flower petals, and in chloroplasts of leaves of Arabidopsis thaliana were purified based on native mass and isoelectric point and identified by mass spectrometry. The stoichiometry between the subunits was determined. The protease complex consisted of one to three copies of five different serine-type protease Clp proteins (ClpP1,3-6) and four non-proteolytic ClpR proteins (ClpR1-4). Three-dimensional homology modeling showed that the ClpP/R proteins fit well together in a tetradecameric complex and also indicated unique contributions for each protein. Lateral exit gates for proteolysis products are proposed. In addition, ClpS1,2, unique to land plants, tightly interacted with this core complex, with one copy of each per complex. The three-dimensional modeling show that they do fit well on the axial sites of the ClpPR cores. In contrast to plastids, plant mitochondria contained a single approximately 320-kDa homo-tetradecameric ClpP2 complex, without association of ClpR or ClpS proteins. It is surprising that the Clp core composition appears identical in all three plastid types, despite the remarkable differences in plastid proteome composition. This suggests that regulation of plastid proteolysis by the Clp machinery is not through differential regulation of ClpP/R/S gene expression, but rather through substrate recognition mechanisms and regulated interaction of chaperone-like molecules (ClpS1,2 and others) to the ClpP/R core. Clp protease complexes from photosynthetic and non-photosynthetic plastids and mitochondria of plants, their predicted three-dimensional structures, and functional implications.,Peltier JB, Ripoll DR, Friso G, Rudella A, Cai Y, Ytterberg J, Giacomelli L, Pillardy J, van Wijk KJ J Biol Chem. 2004 Feb 6;279(6):4768-81. Epub 2003 Oct 30. PMID:14593120[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. References
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