Structure of 1-aminocyclopropane-1-carboxylate synthase in complex with an amino-oxy analogue of the substrate: implications for substrate binding.
Capitani, G., Eliot, A.C., Gut, H., Khomutov, R.M., Kirsch, J.F., Grutter, M.G.(2003) Biochim Biophys Acta Proteins Proteom 1647: 55-60
- PubMed: 12686108
- DOI: https://doi.org/10.1016/s1570-9639(03)00049-9
- Primary Citation of Related Structures:
1M4N - PubMed Abstract:
The crystal structure of 1-aminocyclopropane-1-carboxylate (ACC) synthase in complex with the substrate analogue [2-(amino-oxy)ethyl](5'-deoxyadenosin-5'-yl)(methyl)sulfonium (AMA) was determined at 2.01-A resolution. The crystallographic results show that a covalent adduct (oxime) is formed between AMA (an amino-oxy analogue of the natural substrate S-adenosyl-L-methionine (SAM)) and the pyridoxal 5'-phosphate (PLP) cofactor of ACC synthase. The oxime formation is supported by spectroscopic data. The ACC synthase-AMA structure provides reliable and detailed information on the binding mode of the natural substrate of ACC synthase and complements previous structural and functional work on this enzyme.
Organizational Affiliation:
Biochemisches Institut der Universität Zürich, Winterthurerstrasse 190, CH-8057 Zürich, Switzerland. capitani@bioc.unizh.ch