Conformational changes of creatine kinase in trifluoroethanol solutions
نویسندگان
چکیده
منابع مشابه
NOVEL REAGENTS FOR CREATINE KINASE
The purpose of this investigation was to develop a simple colorimetric method for creatine kinase (CK). The new method is based on the reaction of creatine, formed enzymatically from creatine phosphate and ADP, with different glyoxal compounds. Hydrated glyoxals, such as para-nitrophenyl, 2-thiophene, 4- biphenyl, 4, 4' -biphenyl,α-naphthyl, β-naphthyl, para-chlorophenyl, and styryl were...
متن کاملConformational changes at the active site of creatine kinase at low concentrations of guanidinium chloride.
It has been previously reported that, during denaturation of creatine kinase by guanidinium chloride (GdmCl) or urea [Tsou (1986), Trends Biochem. Sci. 11, 427-429], inactivation occurs before noticeable conformational change can be detected, and it is suggested that the conformation at the active site is more easily perturbed and hence more flexible than the molecule as a whole. In this study,...
متن کاملStructural changes of creatine kinase upon substrate binding.
Small-angle x-ray scattering was used to investigate structural changes upon binding of individual substrates or a transition state analog complex (TSAC; Mg-ADP, creatine, and KNO3) to creatine kinase (CK) isoenzymes (dimeric muscle-type (M)-CK and octameric mitochondrial (Mi)-CK) and monomeric arginine kinase (AK). Considerable changes in the shape and the size of the molecules occurred upon b...
متن کاملCreatine and creatine kinase measurement.
*Many methods for measuring creatine are known, the principal ones being direct calorimetric assay (l), indirect calorimetric assay (2), and destruction with bacterial adaptive enzymes (3). However, none of these methods are specific nor are they sensitive enough to detect very small amounts of creatine. rIhese assays have been used to examine urine and serum for creatine content, but, because ...
متن کاملConformational changes in the reaction of pyridoxal kinase.
To understand the processes involved in the catalytic mechanism of pyridoxal kinase (PLK),1 we determined the crystal structures of PLK.AMP-PCP-pyridoxamine, PLK.ADP.PLP, and PLK.ADP complexes. Comparisons of these structures have revealed that PLK exhibits different conformations during its catalytic process. After the binding of AMP-PCP (an analogue that replaced ATP) and pyridoxamine to PLK,...
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ژورنال
عنوان ژورنال: IUBMB Life
سال: 1997
ISSN: 1521-6543
DOI: 10.1080/15216549700205121