View source for 8hw1


==Far-red light-harvesting complex of Antarctic alga Prasiola crispa==
<StructureSection load='8hw1' size='340' side='right'caption='[[8hw1]], [[Resolution|resolution]] 3.13&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[8hw1]] is a 11 chain structure with sequence from [https://en.wikipedia.org/wiki/Prasiola_crispa Prasiola crispa]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=8HW1 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=8HW1 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]] 3.13&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=32N:(1S)-4-[(1E,3Z,5E,7E,9E,11E,13E,15E,17E)-3-(hydroxymethyl)-7,12,16-trimethyl-18-[(1R,4S)-2,6,6-trimethyl-4-oxidanyl-cyclohex-2-en-1-yl]octadeca-1,3,5,7,9,11,13,15,17-nonaenyl]-3,5,5-trimethyl-cyclohex-3-en-1-ol'>32N</scene>, <scene name='pdbligand=CLA:CHLOROPHYLL+A'>CLA</scene>, <scene name='pdbligand=XAT:(3S,5R,6S,3S,5R,6S)-5,6,5,6-DIEPOXY-5,6,5,6-+TETRAHYDRO-BETA,BETA-CAROTENE-3,3-DIOL'>XAT</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=8hw1 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=8hw1 OCA], [https://pdbe.org/8hw1 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=8hw1 RCSB], [https://www.ebi.ac.uk/pdbsum/8hw1 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=8hw1 ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/CAB1_PRACR CAB1_PRACR] 
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Prasiola crispa, an aerial green alga, forms layered colonies under the severe terrestrial conditions of Antarctica. Since only far-red light is available at a deep layer of the colony, P. crispa has evolved a molecular system for photosystem II (PSII) excitation using far-red light with uphill energy transfer. However, the molecular basis underlying this system remains elusive. Here, we purified a light-harvesting chlorophyll (Chl)-binding protein complex from P. crispa (Pc-frLHC) that excites PSII with far-red light and revealed its ring-shaped structure with undecameric 11-fold symmetry at 3.13 A resolution. The primary structure suggests that Pc-frLHC evolved from LHCI rather than LHCII. The circular arrangement of the Pc-frLHC subunits is unique among eukaryote LHCs and forms unprecedented Chl pentamers at every subunitâsubunit interface near the excitation energy exit sites. The Chl pentamers probably contribute to far-red light absorption. Pc-frLHC's unique Chl arrangement likely promotes PSII excitation with entropy-driven uphill excitation energy transfer.

Uphill energy transfer mechanism for photosynthesis in an Antarctic alga.,Kosugi M, Kawasaki M, Shibata Y, Hara K, Takaichi S, Moriya T, Adachi N, Kamei Y, Kashino Y, Kudoh S, Koike H, Senda T Nat Commun. 2023 Feb 15;14(1):730. doi: 10.1038/s41467-023-36245-1. PMID:36792917<ref>PMID:36792917</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 8hw1" style="background-color:#fffaf0;"></div>
== References ==
<references/>
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</StructureSection>
[[Category: Large Structures]]
[[Category: Prasiola crispa]]
[[Category: Adachi N]]
[[Category: Kawasaki M]]
[[Category: Kosugi M]]
[[Category: Moriya T]]
[[Category: Senda T]]
[[Category: Shibata Y]]