Download MendeleyCrystallization and preliminary X-ray study of alkaline mannanase from an alkaliphilic Bacillus isolate.
Akita, M., Takeda, N., Hirasawa, K., Sakai, H., Kawamoto, M., Yamamoto, M., Grant, W.D., Hatada, Y., Ito, S., Horikoshi, K.(2004) Acta Crystallogr D Biol Crystallogr 60: 1490-1492
- PubMed: 15272186
- DOI: https://doi.org/10.1107/S0907444904014313
- Primary Citation of Related Structures:
1WKY - PubMed Abstract:
An alkaline mannanase (EC 3.2.1.78) from the alkaliphilic Bacillus sp. strain JAMB-602 was cloned and sequenced. The deduced amino-acid sequence of the enzyme suggested that the enzyme consists of a catalytic and unknown additional domains. The recombinant enzyme expressed by B. subtilis was crystallized using the hanging-drop vapour-diffusion method at 277 K. X-ray diffraction data were collected to 1.65 A. The crystal belongs to space group P2(1)2(1)2(1), with unit-cell parameters a = 70.7, b = 79.5, c = 80.4 A. The asymmetric unit contains one protein molecule, with a corresponding VM of 2.26 A3 Da(-1) and a solvent content of 45.6%. Molecular replacement for initial phasing was carried out using the three-dimensional structure of a mannanase from Thermomonospora fusca as a search model, which corresponds to the catalytic domain of the alkaline mannanase. It gave sufficient phases to build the unknown domain.
Organizational Affiliation:
Japan Agency for Marine-Earth Science and Technology, 2-15 Natsushima, Yokosuka 237-0061. akitam@jamstec.go.jp
