Crystal structure of chloroplastic ascorbate peroxidase from tobacco plants and structural insights into its instability
Wada, K., Tada, T., Nakamura, Y., Ishikawa, T., Yabuta, Y., Yoshimura, K., Shigeoka, S., Nishimura, K.(2003) J Biochem 134: 239-244
- PubMed: 12966073 
- DOI: 10.1093/jb/mvg136
- Primary Citation of Related Structures:  
1IYN - PubMed Abstract: 
Ascorbate peroxidase (APX) is a heme-containing protein that plays a central role in scavenging H(2)O(2) in higher plants. The structure of stromal APX (sAPX) was determined at 1.6 A to an R-factor of 19.1% and an R-free-factor of 22.3%. The electrostatic potential of the gamma-channel that connects the molecular surface of sAPX to the gamma-edge of heme was more positive than that of cytosolic APX (cAPX) from pea, so sAPX might bind more easily with ascorbate than cAPX ...