1psf

<StructureSection load='1psf' size='340' side='right'caption='[[1psf]], [[NMR_Ensembles_of_Models | 1 NMR models]]' scene=''>

<table><tr><td colspan='2'>[[1psf]] 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=1PSF OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1PSF 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;'>[[1pse|1pse]]</div></td></tr>

[[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.

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== 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>

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<div class="pdbe-citations 1psf" style="background-color:#fffaf0;"></div>

*[[Photosystem I|Photosystem I]]

[[Category: Agmenellum quadruplicatum]]

[[Category: Bryant, D A]]

[[Category: Falzone, C J]]

[[Category: Kao, Y H]]

[[Category: Lecomte, J T.J]]

[[Category: Zhao, J]]

[[Category: Photosystem i]]