Download MendeleyCloning, expression, characterisation and three-dimensional structure determination of Caenorhabditis elegans spermidine synthase
Dufe, V.T., Luersen, K., Eschbach, M.L., Haider, N., Karlberg, T., Walter, R.D., Al-Karadaghi, S.(2005) FEBS Lett 579: 6037-6043
- PubMed: 16226262
- DOI: https://doi.org/10.1016/j.febslet.2005.09.050
- Primary Citation of Related Structures:
2B2C - PubMed Abstract:
The polyamine synthesis enzyme spermidine synthase (SPDS) has been cloned from the model nematode Caenorhabditis elegans. Biochemical characterisation of the recombinantly expressed protein revealed a high degree of similarity to other eukaryotic SPDS with the exception of a low affinity towards the substrate decarboxylated S-adenosylmethionine (Km = 110 microM) and a less pronounced feedback inhibition by the second reaction product 5'-methylthioadenosine (IC50 = 430 microM). The C. elegans protein that carries a nematode-specific insertion of 27 amino acids close to its N-terminus was crystallized, leading to the first X-ray structure of a dimeric eukaryotic SPDS.
Organizational Affiliation:
Department of Molecular Biophysics, Center for Chemistry and Chemical Engineering, Lund University, P.O. Box 124, 221 00 Lund, Sweden.
