2bkg

Crystal structure of E3_19 a designed ankyrin repeat protein

spinqualitylabelsall models 2bkg, resolution 1.90Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 2bkg is a 2 chain structure. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Related: 1k1a, 1k1b, 1mj0, 1n0q, 1n0r Resources: FirstGlance, OCA, PDBe, 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 Consensus-designed ankyrin repeat (AR) proteins are thermodynamically very stable. The structural analysis of the designed AR protein E3_5 revealed that this stability is due to a regular fold with highly conserved structural motifs and H-bonding networks. However, the designed AR protein E3_19 exhibits a significantly lower stability than E3_5 (9.6 vs. 14.8 kcal/mol), despite 88% sequence identity. To investigate the structural correlations of this stability difference between E3_5 and E3_19, we determined the crystal structure of E3_19 at 1.9 A resolution. E3_19 as well has a regular AR domain fold with the characteristic H-bonding patterns. All structural features of the E3_5 and E3_19 molecules appear to be virtually identical (RMSD(Calpha) approximately 0.7 A). However, clear differences are observed in the surface charge distribution of the two AR proteins. E3_19 features clusters of charged residues and more exposed hydrophobic residues than E3_5. The atomic coordinates of E3_19 have been deposited in the Protein Data Bank. PDB ID: 2BKG. Crystal structure of a consensus-designed ankyrin repeat protein: implications for stability.,Binz HK, Kohl A, Pluckthun A, Grutter MG Proteins. 2006 Nov 1;65(2):280-4. PMID:16493627 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Ankyrin

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