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| | <StructureSection load='5e4w' size='340' side='right'caption='[[5e4w]], [[Resolution|resolution]] 2.80Å' scene=''> | | <StructureSection load='5e4w' size='340' side='right'caption='[[5e4w]], [[Resolution|resolution]] 2.80Å' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[5e4w]] is a 6 chain structure with sequence from [http://en.wikipedia.org/wiki/Arath Arath] and [http://en.wikipedia.org/wiki/Eco57 Eco57]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=5E4W OCA]. For a <b>guided tour on the structure components</b> use [http://proteopedia.org/fgij/fg.htm?mol=5E4W FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[5e4w]] is a 6 chain structure with sequence from [https://en.wikipedia.org/wiki/Arabidopsis_thaliana Arabidopsis thaliana] and [https://en.wikipedia.org/wiki/Escherichia_coli_O157:H7 Escherichia coli O157:H7]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=5E4W OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=5E4W FirstGlance]. <br> |
| - | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=CA:CALCIUM+ION'>CA</scene>, <scene name='pdbligand=GOL:GLYCEROL'>GOL</scene></td></tr> | + | </td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.8Å</td></tr> |
| - | <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">trxA, Z5291, ECs4714 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=83334 ECO57]), CAO, CPSRP43, At2g47450, T30B22.25 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=3702 ARATH]), ALB3, At2g28800, F8N16.9 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=3702 ARATH])</td></tr> | + | <tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=CA:CALCIUM+ION'>CA</scene>, <scene name='pdbligand=GOL:GLYCEROL'>GOL</scene></td></tr> |
| - | <tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://proteopedia.org/fgij/fg.htm?mol=5e4w FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=5e4w OCA], [http://pdbe.org/5e4w PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=5e4w RCSB], [http://www.ebi.ac.uk/pdbsum/5e4w PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=5e4w ProSAT]</span></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=5e4w FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=5e4w OCA], [https://pdbe.org/5e4w PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=5e4w RCSB], [https://www.ebi.ac.uk/pdbsum/5e4w PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=5e4w ProSAT]</span></td></tr> |
| | </table> | | </table> |
| | == Function == | | == Function == |
| - | [[http://www.uniprot.org/uniprot/THIO_ECO57 THIO_ECO57]] Participates in various redox reactions through the reversible oxidation of its active center dithiol to a disulfide and catalyzes dithiol-disulfide exchange reactions (By similarity). [[http://www.uniprot.org/uniprot/ALB3_ARATH ALB3_ARATH]] Required for the insertion of some light harvesting chlorophyll-binding proteins (LHCP) into the chloroplast thylakoid membrane. Required for the insertion of LHCB1, LHCB4.1 and LHCB5 proteins into thylakoid membrane, while it is not required for insertion of proteins PsbX, PsbW and PsbY.<ref>PMID:10636840</ref> <ref>PMID:11524428</ref> <ref>PMID:11891220</ref> <ref>PMID:9165749</ref> [[http://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> | + | [https://www.uniprot.org/uniprot/THIO_ECO57 THIO_ECO57] Participates in various redox reactions through the reversible oxidation of its active center dithiol to a disulfide and catalyzes dithiol-disulfide exchange reactions (By similarity). |
| | <div style="background-color:#fffaf0;"> | | <div style="background-color:#fffaf0;"> |
| | == Publication Abstract from PubMed == | | == Publication Abstract from PubMed == |
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| | __TOC__ | | __TOC__ |
| | </StructureSection> | | </StructureSection> |
| - | [[Category: Arath]] | + | [[Category: Arabidopsis thaliana]] |
| - | [[Category: Eco57]] | + | [[Category: Escherichia coli O157:H7]] |
| | [[Category: Large Structures]] | | [[Category: Large Structures]] |
| - | [[Category: Ahmed, Y L]] | + | [[Category: Ahmed YL]] |
| - | [[Category: Horn, A]] | + | [[Category: Horn A]] |
| - | [[Category: Sinning, I]] | + | [[Category: Sinning I]] |
| - | [[Category: Wild, K]] | + | [[Category: Wild K]] |
| - | [[Category: Chloroplast]]
| + | |
| - | [[Category: Chromodomain]]
| + | |
| - | [[Category: Membrane insertase alb3]]
| + | |
| - | [[Category: Signal recognition particle]]
| + | |
| - | [[Category: Signaling protein]]
| + | |
| - | [[Category: Transport protein]]
| + | |
| Structural highlights
Function
THIO_ECO57 Participates in various redox reactions through the reversible oxidation of its active center dithiol to a disulfide and catalyzes dithiol-disulfide exchange reactions (By similarity).
Publication Abstract from PubMed
Canonical membrane protein biogenesis requires co-translational delivery of ribosome-associated proteins to the Sec translocase and depends on the signal recognition particle (SRP) and its receptor (SR). In contrast, high-throughput delivery of abundant light-harvesting chlorophyll a,b-binding proteins (LHCPs) in chloroplasts to the Alb3 insertase occurs post-translationally via a soluble transit complex including the cpSRP43/cpSRP54 heterodimer (cpSRP). Here we describe the molecular mechanisms of tethering cpSRP to the Alb3 insertase by specific interaction of cpSRP43 chromodomain 3 with a linear motif in the Alb3 C-terminal tail. Combining NMR spectroscopy, X-ray crystallography and biochemical analyses, we dissect the structural basis for selectivity of chromodomains 2 and 3 for their respective ligands cpSRP54 and Alb3, respectively. Negative cooperativity in ligand binding can be explained by dynamics in the chromodomain interface. Our study provides a model for membrane recruitment of the transit complex and may serve as a prototype for a functional gain by the tandem arrangement of chromodomains.
Structural basis for cpSRP43 chromodomain selectivity and dynamics in Alb3 insertase interaction.,Horn A, Hennig J, Ahmed YL, Stier G, Wild K, Sattler M, Sinning I Nat Commun. 2015 Nov 16;6:8875. doi: 10.1038/ncomms9875. PMID:26568381[1]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
See Also
References
- ↑ Horn A, Hennig J, Ahmed YL, Stier G, Wild K, Sattler M, Sinning I. Structural basis for cpSRP43 chromodomain selectivity and dynamics in Alb3 insertase interaction. Nat Commun. 2015 Nov 16;6:8875. doi: 10.1038/ncomms9875. PMID:26568381 doi:http://dx.doi.org/10.1038/ncomms9875
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