2a18 | pdb_00002a18

carboxysome shell protein ccmK4, crystal form 2

spinqualitylabelsall models 2a18, resolution 2.28Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 2a18 is a 3 chain structure with sequence from Aphanocapsa sp. (strain n-1). Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: NH4 Related: 2a10, 2a1b Gene: ccmK4 (Aphanocapsa sp. (strain N-1)) Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum Function [CCMK4_SYNY3] May be involved in the formation of the carboxysome, a polyhedral inclusion where RuBisCO is sequestered (By similarity). Evolutionary Conservation Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf. Publication Abstract from PubMed Bacterial microcompartments are primitive organelles composed entirely of protein subunits. Genomic sequence databases reveal the widespread occurrence of microcompartments across diverse microbes. The prototypical bacterial microcompartment is the carboxysome, a protein shell for sequestering carbon fixation reactions. We report three-dimensional crystal structures of multiple carboxysome shell proteins, revealing a hexameric unit as the basic microcompartment building block and showing how these hexamers assemble to form flat facets of the polyhedral shell. The structures suggest how molecular transport across the shell may be controlled and how structural variations might govern the assembly and architecture of these subcellular compartments. Protein structures forming the shell of primitive bacterial organelles.,Kerfeld CA, Sawaya MR, Tanaka S, Nguyen CV, Phillips M, Beeby M, Yeates TO Science. 2005 Aug 5;309(5736):936-8. PMID:16081736 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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