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==THE THREE-DIMENSIONAL SOLUTION STRUCTURE OF PSAE FROM THE CYANOBACTERIUM SYNECHOCOCCUS SP. STRAIN PCC 7002: A PHOTOSYSTEM I PROTEIN THAT SHOWS STRUCTURAL HOMOLOGY WITH SH3 DOMAINS==
==THE THREE-DIMENSIONAL SOLUTION STRUCTURE OF PSAE FROM THE CYANOBACTERIUM SYNECHOCOCCUS SP. STRAIN PCC 7002: A PHOTOSYSTEM I PROTEIN THAT SHOWS STRUCTURAL HOMOLOGY WITH SH3 DOMAINS==
<StructureSection load='1pse' size='340' side='right'caption='[[1pse]], [[NMR_Ensembles_of_Models | 10 NMR models]]' scene=''>
<StructureSection load='1pse' size='340' side='right'caption='[[1pse]]' scene=''>
== Structural highlights ==
== Structural highlights ==
<table><tr><td colspan='2'>[[1pse]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Agmenellum_quadruplicatum Agmenellum quadruplicatum]. Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1PSE OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1PSE FirstGlance]. <br>
<table><tr><td colspan='2'>[[1pse]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Synechococcus_sp._PCC_7002 Synechococcus sp. PCC 7002]. Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1PSE OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1PSE FirstGlance]. <br>
</td></tr><tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat"><div style='overflow: auto; max-height: 3em;'>[[1psf|1psf]]</div></td></tr>
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">Solution NMR</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=1pse FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1pse OCA], [https://pdbe.org/1pse PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1pse RCSB], [https://www.ebi.ac.uk/pdbsum/1pse PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1pse 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=1pse FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1pse OCA], [https://pdbe.org/1pse PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1pse RCSB], [https://www.ebi.ac.uk/pdbsum/1pse PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1pse ProSAT]</span></td></tr>
</table>
</table>
== Function ==
== Function ==
[[https://www.uniprot.org/uniprot/PSAE_SYNP2 PSAE_SYNP2]] Stabilizes the interaction between PsaC and the PSI core, assists the docking of the ferredoxin to PSI and interacts with ferredoxin-NADP oxidoreductase.  
[https://www.uniprot.org/uniprot/PSAE_SYNP2 PSAE_SYNP2] Stabilizes the interaction between PsaC and the PSI core, assists the docking of the ferredoxin to PSI and interacts with ferredoxin-NADP oxidoreductase.
== Evolutionary Conservation ==
== Evolutionary Conservation ==
[[Image:Consurf_key_small.gif|200px|right]]
[[Image:Consurf_key_small.gif|200px|right]]
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</jmol>, as determined by [http://consurfdb.tau.ac.il/ ConSurfDB]. You may read the [[Conservation%2C_Evolutionary|explanation]] of the method and the full data available from [http://bental.tau.ac.il/new_ConSurfDB/main_output.php?pdb_ID=1pse ConSurf].
</jmol>, as determined by [http://consurfdb.tau.ac.il/ ConSurfDB]. You may read the [[Conservation%2C_Evolutionary|explanation]] of the method and the full data available from [http://bental.tau.ac.il/new_ConSurfDB/main_output.php?pdb_ID=1pse ConSurf].
<div style="clear:both"></div>
<div style="clear:both"></div>
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
PsaE is a 69 amino acid polypeptide from photosystem I present on the stromal side of the thylakoid membrane. The three-dimensional solution structure of this protein from the cyanobacterium Synechococcus sp. strain PCC 7002 was determined at pH 5.8 and room temperature using over 900 experimental restraints derived from two- and three-dimensional NMR experiments. The structure is comprised of a well-defined five-stranded beta-sheet with (+1, +1, +1, -4 alpha) topology. There is no helical region except for a single turn of 3(10) helix between the beta D and beta E strands. PsaE also exhibits a large unrestrained loop spanning residues 42-56. A comparison to known protein structures revealed similarity with the Src homology 3 (SH3) domain, a membrane-associated protein involved in signal transduction in eukaryotes. The match is remarkable as 47 of the alpha-carbons of PsaE can be superimposed onto those of the SH3 domain from chicken brain alpha-spectrin with a root-mean-square deviation of 2.3 A. Although the amino acid sequences have low identity and the loops are different in both proteins, the topology of the beta-sheet and the 3(10) turn is conserved. SH3 domains from other sources show a similar structural homology. The structure of PsaE was used to suggest approaches for elucidating its roles within photosystem I.
Three-dimensional solution structure of PsaE from the cyanobacterium Synechococcus sp. strain PCC 7002, a photosystem I protein that shows structural homology with SH3 domains.,Falzone CJ, Kao YH, Zhao J, Bryant DA, Lecomte JT Biochemistry. 1994 May 24;33(20):6052-62. PMID:8193119<ref>PMID:8193119</ref>
From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 1pse" style="background-color:#fffaf0;"></div>


==See Also==
==See Also==
*[[Photosystem I|Photosystem I]]
*[[Photosystem I 3D structures|Photosystem I 3D structures]]
== References ==
<references/>
__TOC__
__TOC__
</StructureSection>
</StructureSection>
[[Category: Agmenellum quadruplicatum]]
[[Category: Large Structures]]
[[Category: Large Structures]]
[[Category: Bryant, D A]]
[[Category: Synechococcus sp. PCC 7002]]
[[Category: Falzone, C J]]
[[Category: Bryant DA]]
[[Category: Kao, Y H]]
[[Category: Falzone CJ]]
[[Category: Lecomte, J T.J]]
[[Category: Kao Y-H]]
[[Category: Zhao, J]]
[[Category: Lecomte JTJ]]
[[Category: Photosystem i]]
[[Category: Zhao J]]
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