1cq4 | pdb_00001cq4

CI2 MUTANT WITH TETRAGLUTAMINE (MGQQQQGM) REPLACING MET59

spinqualitylabelsall models 1cq4, resolution 1.80Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 1cq4 is a 2 chain structure with sequence from Barley. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: SO4 Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function [ICI2_HORVU] Inhibits both subtilisin and chymotrypsin. 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 We have constructed mutants of chymotrypsin inhibitor 2 with short glutamine repeats inserted into its inhibitory loop. These mutants oligomerize when expressed in Escherichia coli. The dimer of a mutant with four glutamines now has been crystallized, and its structure has been solved by molecular replacement by using the wild-type monomer as a search model. The structure of each half of the dimer is found to be the same as that of the wild-type monomer, except around the glutamine insertion. It was proposed that the components of the oligomers are held together by hydrogen bonds between the main-chain and side-chain amides of the glutamine repeats. Instead, they appear to form by swapping domains on folding in E. coli, and the glutamine repeats connecting the components of the dimers are disordered. Crystal structure of a dimeric chymotrypsin inhibitor 2 mutant containing an inserted glutamine repeat.,Chen YW, Stott K, Perutz MF Proc Natl Acad Sci U S A. 1999 Feb 16;96(4):1257-61. PMID:9990011 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Chymotrypsin inhibitor 3D structures

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