1ch4 | pdb_00001ch4
MODULE-SUBSTITUTED CHIMERA HEMOGLOBIN BETA-ALPHA (F133V)
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Overview
The crystal structure of the homotetramer of a chimera beta alpha-subunit, of human hemoglobin was refined at 2.5 A resolution. The chimera subunit, was constructed by replacing an exon-encoded module M4 of the beta-subunit, with that of the alpha-subunit, simulating an exon-shuffling event. The, implanted module M4 retained the native alpha-subunit structure, while, module M3 was disturbed around the site where a new type of intron was, recently found. Some of the residues were found in alternative, conformations that avoid steric hindrance at the subunit interface. The, modules are modestly rigid in their backbone structures by using, side-chains to compensate for interface incompatibility.
About this Structure
1CH4 is a Protein complex structure of sequences from Homo sapiens with HEM and CMO as ligands. Full crystallographic information is available from OCA.
Reference
Crystal structure of a protein with an artificial exon-shuffling, module M4-substituted chimera hemoglobin beta alpha, at 2.5 A resolution., Shirai T, Fujikake M, Yamane T, Inaba K, Ishimori K, Morishima I, J Mol Biol. 1999 Mar 26;287(2):369-82. PMID:10080899
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