Structural basis for the activation of glycogen phosphorylase b by adenosine monophosphate.Sprang, S.R., Withers, S.G., Goldsmith, E.J., Fletterick, R.J., Madsen, N.B.
(1991) Science 254: 1367-1371
- PubMed: 1962195
- PubMed Abstract:
- Structure of the Nucleotide Activation Switch in Glycogen Phosphorylase A
Sprang, S.,Goldsmith, E.,Fletterick, R.
(1987) Science 237: 1012
- Domain Separation in the Activation of Glycogen Phosphorylase A
Goldsmith, E.J.,Sprang, S.R.,Hamlin, R.,Xuong, N.-H.,Fletterick, R.J.
(1989) Science 245: 528
- Structural Changes in Glycogen Phosphorylase Induced by Phosphorylation
Sprang, S.R.,Acharya, K.R.,Goldsmith, E.J.,Stuart, D.I.,Varvill, K.,Fletterick, R.J.,Madsen, N.B.,Johnson, L.N.
(1988) Nature 336: 215
- The Structure of Glycogen Phosphorylase a at 2.5 Angstroms Resolution
Sprang, S.,Fletterick, R.J.
(1979) J.Mol.Biol. 131: 523
- Multiple Phosphate Positions in the Catalytic Site of Glycogen Phosphorylase: Structure of the Pyridoxal-5'-Pyrophosphate Coenzyme-Substrate Analog
Sprang, S.R.,Madsen, N.B.,Withers, S.G.
(1992) Protein Sci. 1: 1100
- Evidence for Direct Phosphate-Phosphate Interaction between Pyridoxal Phosphate and Substrate in the Glycogen Phosphorylase Catalytic Mechanism
Withers, S.G.,Madsen, N.B.,Sykes, B.D.,Takagi, M.,Shimomura, S.,Fukui, T.
(1981) J.Biol.Chem. 256: 10759
- Catalytic Site of Glycogen Phosphorylase: Structural Changes During Activation and Mechanistic Implications
Withers, S.G.,Madsen, N.B.,Sprang, S.R.,Fletterick, R.J.
(1982) Biochemistry 21: 5372
The three-dimensional structure of the activated state of glycogen phosphorylase (GP) as induced by adenosine monophosphate (AMP) has been determined from crystals of pyridoxalpyrophosphoryl-GP. The same quaternary changes relative to the inactive co ...
The three-dimensional structure of the activated state of glycogen phosphorylase (GP) as induced by adenosine monophosphate (AMP) has been determined from crystals of pyridoxalpyrophosphoryl-GP. The same quaternary changes relative to the inactive conformation as those induced by phosphorylation are induced by AMP, although the two regulatory signals function through different local structural mechanisms. Moreover, previous descriptions of the phosphorylase active state have been extended by demonstrating that, on activation, the amino- and carboxyl-terminal domains of GP rotate apart by 5 degrees, thereby increasing access of substrates to the catalytic site. The structure also reveals previously unobserved interactions with the nucleotide that accounts for the specificity of the nucleotide binding site for AMP in preference to inosine monophosphate.
Howard Hughes Medical Institute, University of Texas Southwestern Medical Center, Dallas 75235-9050.