1b8d: Difference between revisions
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[[Image:1b8d.gif|left|200px]] | [[Image:1b8d.gif|left|200px]] | ||
'''CRYSTAL STRUCTURE OF A PHYCOUROBILIN-CONTAINING PHYCOERYTHRIN''' | {{Structure | ||
|PDB= 1b8d |SIZE=350|CAPTION= <scene name='initialview01'>1b8d</scene>, resolution 1.90Å | |||
|SITE= | |||
|LIGAND= <scene name='pdbligand=PEB:PHYCOERYTHROBILIN'>PEB</scene> and <scene name='pdbligand=PUB:PHYCOUROBILIN'>PUB</scene> | |||
|ACTIVITY= | |||
|GENE= | |||
}} | |||
'''CRYSTAL STRUCTURE OF A PHYCOUROBILIN-CONTAINING PHYCOERYTHRIN''' | |||
==Overview== | ==Overview== | ||
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==About this Structure== | ==About this Structure== | ||
1B8D is a [ | 1B8D is a [[Protein complex]] structure of sequences from [http://en.wikipedia.org/wiki/Griffithsia_monilis Griffithsia monilis]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1B8D OCA]. | ||
==Reference== | ==Reference== | ||
Crystal structure of a phycourobilin-containing phycoerythrin at 1.90-A resolution., Ritter S, Hiller RG, Wrench PM, Welte W, Diederichs K, J Struct Biol. 1999 Jun 15;126(2):86-97. PMID:[http:// | Crystal structure of a phycourobilin-containing phycoerythrin at 1.90-A resolution., Ritter S, Hiller RG, Wrench PM, Welte W, Diederichs K, J Struct Biol. 1999 Jun 15;126(2):86-97. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/10388620 10388620] | ||
[[Category: Griffithsia monilis]] | [[Category: Griffithsia monilis]] | ||
[[Category: Protein complex]] | [[Category: Protein complex]] | ||
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[[Category: red algae]] | [[Category: red algae]] | ||
''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Mar 20 10:07:36 2008'' | ||
Revision as of 08:07, 20 March 2008
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| 1b8d, resolution 1.90Å | |||||||||||||
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| Ligands: | PEB and PUB | ||||||||||||
| Coordinates: | save as pdb, mmCIF, xml | ||||||||||||
CRYSTAL STRUCTURE OF A PHYCOUROBILIN-CONTAINING PHYCOERYTHRIN
Overview
The structure of R-phycoerythrin (R-PE) from the red alga Griffithsia monilis was solved at 1.90-A resolution by molecular replacement, using the atomic coordinates of cyanobacterial phycocyanin from Fremyella diplosiphon as a model. The crystallographic R factor for the final model is 17.5% (Rfree 22.7%) for reflections in the range 100-1.90 A. The model consists of an (alphabeta)2 dimer with an internal noncrystallographic dyad and a fragment of the gamma-polypeptide. The alpha-polypeptide (164 amino acid residues) has two covalently bound phycoerythrobilins at positions alpha82 and alpha139. The beta-polypeptide (177 residues) has two phycoerythrobilins bound to residues beta82 and beta158 and one phycourobilin covalently attached to rings A and D at residues beta50 and beta61, respectively. The electron density of the gamma-polypeptide is mostly averaged out by threefold crystallographic symmetry, but a dipeptide (Gly-Tyr) and one single Tyr could be modeled. These two tyrosine residues of the gamma-polypeptide are in close proximity to the phycoerythrobilins at position beta82 of two symmetry-related beta-polypeptides and are related by the same noncrystallographic dyad as the (alphabeta)2 dimer. Possible energy transfer pathways are discussed briefly.
About this Structure
1B8D is a Protein complex structure of sequences from Griffithsia monilis. Full crystallographic information is available from OCA.
Reference
Crystal structure of a phycourobilin-containing phycoerythrin at 1.90-A resolution., Ritter S, Hiller RG, Wrench PM, Welte W, Diederichs K, J Struct Biol. 1999 Jun 15;126(2):86-97. PMID:10388620
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