3n3e | pdb_00003n3e

Zebrafish AlphaA crystallin

spinqualitylabelsall models 3n3e, resolution 1.75Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 3n3e is a 2 chain structure with sequence from Danio rerio. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Gene: cryaa (Danio rerio) Resources: FirstGlance, OCA, RCSB, PDBsum 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 In previous work on truncated alpha crystallins (Laganowsky et al., Protein Sci 2010; 19:1031-1043), we determined crystal structures of the alpha crystallin core, a seven beta-stranded immunoglobulin-like domain, with its conserved C-terminal extension. These extensions swap into neighboring cores forming oligomeric assemblies. The extension is palindromic in sequence, binding in either of two directions. Here, we report the crystal structure of a truncated alphaA crystallin (AAC) from zebrafish (Danio rerio) revealing C-terminal extensions in a non three-dimensional (3D) domain swapped, "closed" state. The extension is quasi-palindromic, bound within its own zebrafish core domain, lying in the opposite direction to that of bovine AAC, which is bound within an adjacent core domain (Laganowsky et al., Protein Sci 2010; 19:1031-1043). Our findings establish that the C-terminal extension of alpha crystallin proteins can be either 3D domain swapped or non-3D domain swapped. This duality provides another molecular mechanism for alpha crystallin proteins to maintain the polydispersity that is crucial for eye lens transparency. Non-3D domain swapped crystal structure of truncated zebrafish alphaA crystallin.,Laganowsky A, Eisenberg D Protein Sci. 2010 Oct;19(10):1978-84. PMID:20669149 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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