View source for 6nwa


==The structure of the photosystem I IsiA super-complex==
<SX load='6nwa' size='340' side='right' viewer='molstar' caption='[[6nwa]], [[Resolution|resolution]] 3.48&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[6nwa]] is a 30 chain structure with sequence from [https://en.wikipedia.org/wiki/Synechocystis_sp._PCC_6803 Synechocystis sp. PCC 6803]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6NWA OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=6NWA FirstGlance]. <br>
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">Electron Microscopy, [[Resolution|Resolution]] 3.48&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=BCR:BETA-CAROTENE'>BCR</scene>, <scene name='pdbligand=CA:CALCIUM+ION'>CA</scene>, <scene name='pdbligand=CLA:CHLOROPHYLL+A'>CLA</scene>, <scene name='pdbligand=LHG:1,2-DIPALMITOYL-PHOSPHATIDYL-GLYCEROLE'>LHG</scene>, <scene name='pdbligand=LMG:1,2-DISTEAROYL-MONOGALACTOSYL-DIGLYCERIDE'>LMG</scene>, <scene name='pdbligand=LMT:DODECYL-BETA-D-MALTOSIDE'>LMT</scene>, <scene name='pdbligand=PQN:PHYLLOQUINONE'>PQN</scene></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=6nwa FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6nwa OCA], [https://pdbe.org/6nwa PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=6nwa RCSB], [https://www.ebi.ac.uk/pdbsum/6nwa PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=6nwa ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/PSAA_SYNY3 PSAA_SYNY3] 
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Photochemical conversion in oxygenic photosynthesis takes place in two large protein-pigment complexes named photosystem II and photosystem I (PSII and PSI, respectively). Photosystems associate with antennae in vivo to increase the size of photosynthetic units to hundreds or thousands of pigments. Regulation of the interactions between antennae and photosystems allows photosynthetic organisms to adapt to their environment. In low-iron environments, cyanobacteria express IsiA, a PSI antenna, critical to their survival. Here we describe the structure of the PSI-IsiA complex isolated from the mesophilic cyanobacterium Synechocystis sp. PCC 6803. This 2-MDa photosystem-antenna supercomplex structure reveals more than 700 pigments coordinated by 51 subunits, as well as the mechanisms facilitating the self-assembly and association of IsiA with multiple PSI assemblies.

The structure of the stress-induced photosystem I-IsiA antenna supercomplex.,Toporik H, Li J, Williams D, Chiu PL, Mazor Y Nat Struct Mol Biol. 2019 Jun;26(6):443-449. doi: 10.1038/s41594-019-0228-8. Epub, 2019 May 27. PMID:31133699<ref>PMID:31133699</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 6nwa" style="background-color:#fffaf0;"></div>

==See Also==
*[[Photosystem I 3D structures|Photosystem I 3D structures]]
== References ==
<references/>
__TOC__
</SX>
[[Category: Large Structures]]
[[Category: Synechocystis sp. PCC 6803]]
[[Category: Chiu PL]]
[[Category: Li J]]
[[Category: Mazor Y]]
[[Category: Toporik H]]
[[Category: Williams D]]