Download MendeleySerine racemase with catalytically active lysinoalanyl residue.
Yamauchi, T., Goto, M., Wu, H.Y., Uo, T., Yoshimura, T., Mihara, H., Kurihara, T., Miyahara, I., Hirotsu, K., Esaki, N.(2009) J Biochem 145: 421-424
- PubMed: 19155267
- DOI: https://doi.org/10.1093/jb/mvp010
- Primary Citation of Related Structures:
2ZPU - PubMed Abstract:
Serine racemase synthesizes d-serine, a physiological agonist of the NMDA receptor in mammalian brains. Schizosaccharomyces pombe produces serine racemase (spSR) that is highly similar to the brain enzyme. Our mass-spectrometric and X-ray studies revealed that spSR is modified with its natural substrate serine. spSR remains partially active even though its essential Lys57 inherently forming a Schiff base with the coenzyme pyridoxal 5'-phosphate is converted to N(6)-(R-2-amino-2-carboxyethyl)-l-lysyl (lysino-d-alanyl) residue. This indicates that the alpha-amino group of the d-alanyl moiety of the lysino-d-alanyl residue serves as a catalytic base in the same manner as the epsilon-amino group of Lys57 of the original spSR.
Organizational Affiliation:
Institute for Chemical Research, Kyoto University, Uji, Kyoto 611-0011, Japan.
