1x32

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[[Image:1x32.gif|left|200px]]
 
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{{Structure
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==Three Dimensional Solution Structure of the Chromo1 domain of cpSRP43==
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|PDB= 1x32 |SIZE=350|CAPTION= <scene name='initialview01'>1x32</scene>
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<StructureSection load='1x32' size='340' side='right'caption='[[1x32]]' scene=''>
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|SITE=
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== Structural highlights ==
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|LIGAND=
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<table><tr><td colspan='2'>[[1x32]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Arabidopsis_thaliana Arabidopsis thaliana]. Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1X32 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1X32 FirstGlance]. <br>
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|ACTIVITY=
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</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">Solution NMR</td></tr>
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|GENE=
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<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=1x32 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1x32 OCA], [https://pdbe.org/1x32 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1x32 RCSB], [https://www.ebi.ac.uk/pdbsum/1x32 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1x32 ProSAT]</span></td></tr>
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|DOMAIN=
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</table>
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|RELATEDENTRY=
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== Function ==
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|RESOURCES=<span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1x32 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1x32 OCA], [http://www.ebi.ac.uk/pdbsum/1x32 PDBsum], [http://www.rcsb.org/pdb/explore.do?structureId=1x32 RCSB]</span>
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[https://www.uniprot.org/uniprot/SR43C_ARATH SR43C_ARATH] Component of the chloroplast signal recognition particle pathway. Required for post-translational targeting of proteins into the tylakoid membrane but seems to be dispensable for co-translational targeting with a translating ribosome present. May be able to function independently of cpFTSY and FFC/cpSRP54 in targeting LHCPs to the thylakoids. Acts as a highly specific chaperone for LHCPs, preventing aggregation and being able to dissolve aggregates.<ref>PMID:9878634</ref> <ref>PMID:10480939</ref> <ref>PMID:15292240</ref> <ref>PMID:17513500</ref> <ref>PMID:20498370</ref>
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}}
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<div style="background-color:#fffaf0;">
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== Publication Abstract from PubMed ==
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Chloroplasts contain a unique signal recognition particle (cpSRP). Unlike the cytoplasmic forms, the cpSRP lacks RNA but contains a conserved 54-kDa GTPase and a novel 43-kDa subunit (cpSRP43). Recently, three functionally distinct chromodomains (CDs) have been identified in cpSRP43. In the present study, we report the three-dimensional solution structures of the three CDs (CD1, CD2, and CD3) using a variety of triple resonance NMR experiments. The structure of CD1 consists of a triple-stranded beta-sheet segment. The C-terminal helical segment typically found in the nuclear chromodomains is absent in CD1. The secondary structural elements in CD2 and CD3 include a triple-stranded antiparallel beta-sheet and a C-terminal helix. Interestingly, the orientation of the C-terminal helix is significantly different in the structures of CD2 and CD3. Critical comparison of the structures of the chromodomains of cpSRP43 with those found in nuclear chromodomain proteins revealed that the diverse protein-protein interactions mediated by the CDs appear to stem from the differences that exist in the surface charge potentials of each CD. Results of isothermal titration calorimetry experiments confirmed that only CD2 is involved in binding to cpSRP54. The negatively charged C-terminal helix in CD2 possibly plays a crucial role in the cpSRP54-cpSRP43 interaction.
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'''Three Dimensional Solution Structure of the Chromo1 domain of cpSRP43'''
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Three-dimensional solution structures of the chromodomains of cpSRP43.,Sivaraja V, Kumar TK, Leena PS, Chang AN, Vidya C, Goforth RL, Rajalingam D, Arvind K, Ye JL, Chou J, Henry R, Yu C J Biol Chem. 2005 Dec 16;280(50):41465-71. Epub 2005 Sep 23. PMID:16183644<ref>PMID:16183644</ref>
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From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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</div>
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<div class="pdbe-citations 1x32" style="background-color:#fffaf0;"></div>
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==Overview==
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==See Also==
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Chloroplasts contain a unique signal recognition particle (cpSRP). Unlike the cytoplasmic forms, the cpSRP lacks RNA but contains a conserved 54-kDa GTPase and a novel 43-kDa subunit (cpSRP43). Recently, three functionally distinct chromodomains (CDs) have been identified in cpSRP43. In the present study, we report the three-dimensional solution structures of the three CDs (CD1, CD2, and CD3) using a variety of triple resonance NMR experiments. The structure of CD1 consists of a triple-stranded beta-sheet segment. The C-terminal helical segment typically found in the nuclear chromodomains is absent in CD1. The secondary structural elements in CD2 and CD3 include a triple-stranded antiparallel beta-sheet and a C-terminal helix. Interestingly, the orientation of the C-terminal helix is significantly different in the structures of CD2 and CD3. Critical comparison of the structures of the chromodomains of cpSRP43 with those found in nuclear chromodomain proteins revealed that the diverse protein-protein interactions mediated by the CDs appear to stem from the differences that exist in the surface charge potentials of each CD. Results of isothermal titration calorimetry experiments confirmed that only CD2 is involved in binding to cpSRP54. The negatively charged C-terminal helix in CD2 possibly plays a crucial role in the cpSRP54-cpSRP43 interaction.
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*[[Signal recognition particle 3D structures|Signal recognition particle 3D structures]]
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== References ==
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==About this Structure==
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<references/>
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1X32 is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Arabidopsis_thaliana Arabidopsis thaliana]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1X32 OCA].
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__TOC__
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</StructureSection>
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==Reference==
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Three-dimensional solution structures of the chromodomains of cpSRP43., Sivaraja V, Kumar TK, Leena PS, Chang AN, Vidya C, Goforth RL, Rajalingam D, Arvind K, Ye JL, Chou J, Henry R, Yu C, J Biol Chem. 2005 Dec 16;280(50):41465-71. Epub 2005 Sep 23. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/16183644 16183644]
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[[Category: Arabidopsis thaliana]]
[[Category: Arabidopsis thaliana]]
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[[Category: Single protein]]
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[[Category: Large Structures]]
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[[Category: Henry, R.]]
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[[Category: Henry R]]
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[[Category: Kumar, T K.]]
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[[Category: Kumar TK]]
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[[Category: Sivaraja, V.]]
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[[Category: Sivaraja V]]
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[[Category: Yu, C.]]
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[[Category: Yu C]]
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[[Category: chromo domain 1]]
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[[Category: cpsrp43]]
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[[Category: lhcp]]
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[[Category: signal recognition particle]]
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[[Category: thylakoid]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Mon Mar 31 00:44:15 2008''
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Current revision

Three Dimensional Solution Structure of the Chromo1 domain of cpSRP43

PDB ID 1x32

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