Ligand Number of residues in structure PDB code Method R.M.S.D. (Å) * Binding affinity (K d ) EGF 47 1IVO X-ray 0.00 0.6 nM AR 50 2RNL NMR 1.45 350 nM BTC 50 1IPO NMR 4.00 1.4 nM EPR 46 1K37 N... R 1.90 2.8 µM *** HB-EGF 40 1XDT X-ray 0.93 7.1 nM EPG 42 Q6UW88 ** Homology 2.05 >500 nM TGF-α 50 1MOX X-ray 3.09 9.2 nM * : Root mean square deviation relative to EGF in 1IVO structure, ** : SWISS-MODEL repository code for homology model database [41] , [42] , *** : Murine Epiregulin.
A) Structural alignment of EGFR-EGF model (colored cyan) and TGF-α-EGFR x-ray structure (colored magenta) (PDB ID 1MOX) complexes.