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An adenosine 3':5'-monophosphate-adenosine binding protein from mouse liver: some physicochemical properties. 1978

P M Ueland, and T Skotland, and S O Døskeland, and T Flatmark

A number of physiochemical properties of the cyclic AMP-adenosine binding protein of mouse liver (Ueland, P.M. and Døskeland, S.O. (1977) J. Biol. Chem. 252, 677--686) have been studied. 1. The specific extinction coefficient, E1%280nm, was estimated to 13.0. 2. Amino acid and amide group analyses confirmed the acidic properties of the protein as determined by electrofocusing (pI = 5.7). Based on the estimated partial specific volume (v = 0.74 cm3/g) the minimum molecular weight of the native, tetrameric protein was recalculated to be 185 000 (s20,w = 8.8 . 10(-13) s and Stokes radius = 48 A). 3. No NH2-terminal amino acid was found by the dansyl method using [14C]-dansyl chloride, indicating that the NH2-terminal groups are blocked. 4. Amino acid analyses gave 6 half-cystine residues per subunit, and the same number of free sulfhydryl groups was found by titration of the denatured protein with 5,5'-dithiobis (2-nitrobenzoic acid). 5. The reactivity of the SH groups in the native protein with 5,5'-dithiobis (2-nitrobenzoic acid) revealed rapidly reacting (SHI), sluggishly reacting (SHII) and "masked" (SHIII) SH groups. ATP, adenosine, Mg2+ and KCl, factors known to affect the activation of cyclic AMP binding sites (Ueland, P.M. and Døskeland, S.O. (1978) Arch. Biochem. Biophys., in press) changed the reactivity of separate SH groups.

UI MeSH Term Description Entries
D008099 Liver A large lobed glandular organ in the abdomen of vertebrates that is responsible for detoxification, metabolism, synthesis and storage of various substances. Livers
D008970 Molecular Weight The sum of the weight of all the atoms in a molecule. Molecular Weights,Weight, Molecular,Weights, Molecular
D002241 Carbohydrates A class of organic compounds composed of carbon, hydrogen, and oxygen in a ratio of Cn(H2O)n. The largest class of organic compounds, including STARCH; GLYCOGEN; CELLULOSE; POLYSACCHARIDES; and simple MONOSACCHARIDES. Carbohydrate
D002352 Carrier Proteins Proteins that bind or transport specific substances in the blood, within the cell, or across cell membranes. Binding Proteins,Carrier Protein,Transport Protein,Transport Proteins,Binding Protein,Protein, Carrier,Proteins, Carrier
D000241 Adenosine A nucleoside that is composed of ADENINE and D-RIBOSE. Adenosine or adenosine derivatives play many important biological roles in addition to being components of DNA and RNA. Adenosine itself is a neurotransmitter. Adenocard,Adenoscan
D000242 Cyclic AMP An adenine nucleotide containing one phosphate group which is esterified to both the 3'- and 5'-positions of the sugar moiety. It is a second messenger and a key intracellular regulator, functioning as a mediator of activity for a number of hormones, including epinephrine, glucagon, and ACTH. Adenosine Cyclic 3',5'-Monophosphate,Adenosine Cyclic 3,5 Monophosphate,Adenosine Cyclic Monophosphate,Adenosine Cyclic-3',5'-Monophosphate,Cyclic AMP, (R)-Isomer,Cyclic AMP, Disodium Salt,Cyclic AMP, Monoammonium Salt,Cyclic AMP, Monopotassium Salt,Cyclic AMP, Monosodium Salt,Cyclic AMP, Sodium Salt,3',5'-Monophosphate, Adenosine Cyclic,AMP, Cyclic,Adenosine Cyclic 3',5' Monophosphate,Cyclic 3',5'-Monophosphate, Adenosine,Cyclic Monophosphate, Adenosine,Cyclic-3',5'-Monophosphate, Adenosine,Monophosphate, Adenosine Cyclic
D000577 Amides Organic compounds containing the -CO-NH2 radical. Amides are derived from acids by replacement of -OH by -NH2 or from ammonia by the replacement of H by an acyl group. (From Grant & Hackh's Chemical Dictionary, 5th ed) Amide
D000596 Amino Acids Organic compounds that generally contain an amino (-NH2) and a carboxyl (-COOH) group. Twenty alpha-amino acids are the subunits which are polymerized to form proteins. Amino Acid,Acid, Amino,Acids, Amino
D000818 Animals Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA. Animal,Metazoa,Animalia
D001665 Binding Sites The parts of a macromolecule that directly participate in its specific combination with another molecule. Combining Site,Binding Site,Combining Sites,Site, Binding,Site, Combining,Sites, Binding,Sites, Combining

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