View source for 1kib


==cytochrome c6 from Arthrospira maxima: an assembly of 24 subunits in the form of an oblate shell==
<StructureSection load='1kib' size='340' side='right' caption='[[1kib]], [[Resolution|resolution]] 3.50&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[1kib]] is a 8 chain structure with sequence from [http://en.wikipedia.org/wiki/Arthrospira_maxima Arthrospira maxima]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1KIB OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1KIB FirstGlance]. <br>
</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=HEM:PROTOPORPHYRIN+IX+CONTAINING+FE'>HEM</scene></td></tr>
<tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[1f1f|1f1f]]</td></tr>
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1kib FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1kib OCA], [http://pdbe.org/1kib PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1kib RCSB], [http://www.ebi.ac.uk/pdbsum/1kib PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=1kib ProSAT]</span></td></tr>
</table>
== Function ==
[[http://www.uniprot.org/uniprot/CYC6_ARTMA CYC6_ARTMA]] Functions as an electron carrier between membrane-bound cytochrome b6-f and photosystem I in oxygenic photosynthesis. 
== Evolutionary Conservation ==
[[Image:Consurf_key_small.gif|200px|right]]
Check<jmol>
  <jmolCheckbox>
    <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/ki/1kib_consurf.spt"</scriptWhenChecked>
    <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
    <text>to colour the structure by Evolutionary Conservation</text>
  </jmolCheckbox>
</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=1kib ConSurf].
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== Publication Abstract from PubMed ==
Cytochrome c(6) from the cyanobacterium Arthrospira maxima is present in isoforms that can be resolved by size-exclusion chromatography. One isoform crystallized in space group I4(1)32 with eight protein molecules in the asymmetric unit and a total of 384 molecules in the unit cell. Within the crystal, the molecules are arranged as clusters of 24 cytochrome c(6) molecules. Each cluster is a hollow shell with approximate octahedral (432) symmetry. Structural and biochemical studies of cytochrome c(6) isolated from other cyanobacteria and algae have led to the suggestion that cytochrome c(6) forms oligomers. The cytochrome c(6) complex described here is the largest assembly of cytochrome c(6) molecules observed thus far.

Structure of cytochrome c6 from Arthrospira maxima: an assembly of 24 subunits in a nearly symmetric shell.,Kerfeld CA, Sawaya MR, Krogmann DW, Yeates TO Acta Crystallogr D Biol Crystallogr. 2002 Jul;58(Pt 7):1104-10. Epub 2002, Jun 20. PMID:12077429<ref>PMID:12077429</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Arthrospira maxima]]
[[Category: Kerfeld, C A]]
[[Category: Krogmann, D]]
[[Category: Sawaya, M R]]
[[Category: Yeates, T O]]
[[Category: Cytochrome oligomer]]
[[Category: Electron transport]]