2pcy

<StructureSection load='2pcy' size='340' side='right' caption='[[2pcy]], [[Resolution|resolution]] 1.80&Aring;' scene=''>

<table><tr><td colspan='2'>[[2pcy]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/Populus_nigra Populus nigra]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2PCY OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2PCY FirstGlance]. <br>

</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=2pcy FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2pcy OCA], [http://www.rcsb.org/pdb/explore.do?structureId=2pcy RCSB], [http://www.ebi.ac.uk/pdbsum/2pcy PDBsum]</span></td></tr>

[[http://www.uniprot.org/uniprot/PLAS1_POPNI PLAS1_POPNI]] Participates in electron transfer between P700 and the cytochrome b6-f complex in photosystem I.

<scriptWhenChecked>select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/pc/2pcy_consurf.spt"</scriptWhenChecked>

</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/chain_selection.php?pdb_ID=2ata ConSurf].

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== Publication Abstract from PubMed ==

The three-dimensional structure of apoplastocyanin from poplar leaves (Populus nigra var. italica) has been determined by x-ray diffraction at 1.8-A resolution. The structure closely resembles that of the holoprotein. In particular, the positions of the copper-binding residues in the apo- and holoproteins differ by only 0.1-0.3 A. This indicates that the irregular geometry of the "type 1" copper site is imposed upon the metal atom by the polypeptide moiety. A 180 degrees rotation of one solvent-exposed histidine imidazole ring about C beta-C gamma appears to facilitate access to the copper site. The close structural similarity between apo-, Cu-(II)-, and Cu(I)-plastocyanin was initially demonstrated by means of electron density difference maps. Two series of restrained least squares refinement calculations for apoplastocyanin, originating from different sets of atomic positional parameters, were carried out in parallel. Both refinements converged to the same model which, when fully refined, had a residual R = 0.16. Forty-two water molecules were located during the refinement.

The crystal structure of poplar apoplastocyanin at 1.8-A resolution. The geometry of the copper-binding site is created by the polypeptide.,Garrett TP, Clingeleffer DJ, Guss JM, Rogers SJ, Freeman HC J Biol Chem. 1984 Mar 10;259(5):2822-5. PMID:6698995<ref>PMID:6698995</ref>

== References ==

[[Category: Freeman, H C]]

[[Category: Garrett, T P.J]]

[[Category: Guss, J M]]