The ribulose bisphosphate carboxylase/oxygenase of Prochlorothrix hollandica: purification, subunit structure and partial N-terminal sequence analysis of the large subunit.
نویسندگان
چکیده
Ribulose bisphosphate carboxylase/oxygenase was purified to apparent homogeneity from the carboxysomes of Prochlorothrix hollandica. The MW of the native enzyme was estimated to be 560,000 Dalton, comprising large subunits (LSU) of 57,000 Dalton and small subunits (SSU) of 13,000, probably in an 8LSU8SSU quaternary structure. Enzyme activity was maximal at pH 8.0 at 30 degrees C. The requirement of activity for Mg2+ could not be replaced by Mn2+. Co2+, Ca2+ or Cu2+. Amino acid N-terminal sequence analysis of the LSU showed a high degree of conservation when compared to cyanobacterial and chloroplast LSU sequences but was too short to allow a reliable phylogenetic assignment of P. hollandica.
منابع مشابه
Ribulose-1, 5-Bisphosphate Carboxylase/Oxygenase Gene Sequencing in Taxonomic Delineation of Padina Species in theNorthern Coast of the Persian Gulf, (IRAN)
Taxonomic study of the genus Padina (Dictyotales, Phaeophyceae) from the Persian Gulf coast was conducted based on morphology and molecular phylogenetic analyses using chloroplast encoded large subunit RuBisCo (rbcL) gene sequences. Detailed descriptions of each species found in this study are described. Several morphological characters, such as number of cell layers composing the thallus, pr...
متن کاملPost-translational modifications in the large subunit of ribulose bisphosphate carboxylase/oxygenase.
Two adjacent N-terminal tryptic peptides of the large subunit of ribulose bisphosphate carboxylase/oxygenase [3-phospho-D-glycerate carboxy-lyase (dimerizing), EC 4.1.1.39] from spinach, wheat, tobacco, and muskmelon were removed by limited tryptic proteolysis. Characterization by peptide sequencing, amino acid composition, and tandem mass spectrometry revealed that the N-terminal residue from ...
متن کاملReaction-intermediate analogue binding by ribulose bisphosphate carboxylase/oxygenase causes specific changes in proteolytic sensitivity: the amino-terminal residue of the large subunit is acetylated proline.
Trypsin rapidly inactivated the catalytic activities of spinach ribulose bisphosphate carboxylase/oxygenase [3-phospho-D-glycerate carboxy-lyase (dimerizing), EC 4.1.1.39], but the stoichiometry of binding of the reaction-intermediate analogue carboxyarabinitol bisphosphate was only slightly reduced after proteolysis. Electrophoretic analysis indicated that several forms of the large subunit we...
متن کاملIsolated Spinach Ribulose-1,5-Bisphosphate Carboxylase/Oxygenase Large Subunit εN- Methyltransferase and Method of Inactivating Ribulose-1,5-Bisphosphatase Carboxylase/ Oxygenase Large Subunit εN-Methyltransferase Activity
متن کامل
Preliminary structural studies of ribulose-1,5-bisphosphate carboxylase/oxygenase from Rhodospirillum rubrum.
Ribulose-1,5-bisphosphate carboxylase/oxygenase (EC 4.1.1.39) from Rhodospirillum rubrum has been crystallized in a form that is suitable for structural studies by x-ray diffraction. The asymmetric unit of the crystal contains one dimeric enzyme molecule of molecular mass 101,000 Da. The enzyme was activated prior to crystallization and is presumed to be in the CO2-activated state in the crysta...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید
ثبت ناماگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید
ورودعنوان ژورنال:
- Zeitschrift fur Naturforschung. C, Journal of biosciences
دوره 45 7-8 شماره
صفحات -
تاریخ انتشار 1990