title: Identification of two anti-parallel beta-sheet conformations in the solution structure of murine epidermal growth factor by proton magnetic resonance.
abstract: Epidermal growth factor (EGF) is a small mitogenic protein. Proteins with sequence homology with EGF or with its membrane-bound protein receptor have been proposed to play a role in oncogenesis. This report describes solution NMR data that provide evidence that the solution conformation of murine EGF includes an anti-parallel beta-sheet structure involving residues S2-P4, V19-I23, and S28-N32; a small anti-parallel beta-sheet involving residues Y37-S38 and T44-R45; and a multiple-bend (or short irregular helix) structure for residues C6-C14 that is disulfide bonded to the V19-I23/S28-N32 beta-sheet. Implications of these results for structure and function studies of EGF and for molecular design of EGF and homologous alpha-type transforming growth factors are discussed.
mesh_terms: D000818:Animals; D004815:Epidermal Growth Factor; D006860:Hydrogen Bonding; D009682:Magnetic Resonance Spectroscopy; D008297:Male; D051379:Mice; D010455:Peptides; D011487:Protein Conformation; D013329:Structure-Activity Relationship; D015291:Transforming Growth Factors
chemical_list: D010455:Peptides; D004815:Epidermal Growth Factor; D015291:Transforming Growth Factors