5nb3

High resolution C-phycoerythrin from marine cyanobacterium Phormidium sp. A09DM at pH 7.5

spinqualitylabelsall models 5nb3, resolution 1.38Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 5nb3 is a 24 chain structure with sequence from Phormidium rubidum a09dm. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: CL, FMT, MPD, MRD, NA, PEB NonStd Res: MEN Related: 5fvb, 5aqd Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Publication Abstract from PubMed C-Phycoerythrin (PE) from Phormidium sp. A09DM has been crystallized using different conditions and its structure determined to atomic resolution (1.14 A). In order for the pigment present, phycoerythrobilin (PEB), to function as an efficient light-harvesting molecule it must be held rigidly (Kupka and Scheer in Biochim Biophys Acta 1777:94-103, 2008) and, moreover, the different PEB molecules in PE must be arranged, relative to each other, so as to promote efficient energy transfer between them. This improved structure has allowed us to define in great detail the structure of the PEBs and their binding sites. These precise structural details will facilitate theoretical calculations of each PEB's spectroscopic properties. It was possible, however, to suggest a model for which chromophores contribute to the different regions of absorption spectrum and propose a tentative scheme for energy transfer. We show that some subtle differences in one of these PEB binding sites in two of the 12 subunits are caused by crystal contacts between neighboring hexamers in the crystal lattice. This explains some of the differences seen in previous lower resolution structures determined at two different pH values (Kumar et al. in Photosyn Res 129:17-28, 2016). An improved crystal structure of C-phycoerythrin from the marine cyanobacterium Phormidium sp. A09DM.,Sonani RR, Roszak AW, Ortmann de Percin Northumberland C, Madamwar D, Cogdell RJ Photosynth Res. 2017 Sep 16. doi: 10.1007/s11120-017-0443-2. PMID:28918447 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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