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Sigma-Aldrich

Phosphorylase Kinase from rabbit muscle

lyophilized powder, ≥60 units/mg protein

Synonym(s):

ATP:phosphorylase-b phosphotransferase, Dephosphophosphorylase kinase

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About This Item

CAS Number:
Enzyme Commission number:
MDL number:
UNSPSC Code:
12352204
NACRES:
NA.54

form

lyophilized powder

specific activity

≥60 units/mg protein

composition

Protein, 20-40% biuret

foreign activity

ATPase ≤0.5%
phosphorylase a ≤1%
phosphorylase b ≤5%

storage temp.

−20°C

General description

Phosphorylase kinase contains four subunits each containing an α, β, γ, and sigma component. The sigma component binds 4 calcium molecules and is termed calmodulin while the γ unit acts as the catalytic subunit.

Application

Phosphorylase kinase from rabbit muscle has been used in a study to assess features of glycogen phosphorylase. It has also been used in a study to investigate the activation of different forms of muscle phosphorylase kinase by actin.

Unit Definition

One unit will form 1.0 μmolar unit of phosphorylase a from phosphorylase b per min at pH 7.7 at 30°C in the presence of ATP.

Physical form

Lyophilized powder containing (NH4)2SO4, sucrose, β-glycerophosphate and dithioerythritol

Storage Class Code

11 - Combustible Solids

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

Regulatory Information

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Laura A Lane et al.
Molecular & cellular proteomics : MCP, 11(12), 1768-1776 (2012-09-12)
Phosphorylase kinase (PhK), a 1.3 MDa enzyme complex that regulates glycogenolysis, is composed of four copies each of four distinct subunits (α, β, γ, and δ). The catalytic protein kinase subunit within this complex is γ, and its activity is
Monica Balsera et al.
Planta, 237(2), 619-635 (2012-12-12)
Uncovered in studies on photosynthesis 35 years ago, redox regulation has been extended to all types of living cells. We understand a great deal about the occurrence, function, and mechanism of action of this mode of regulation, but we know little
Kathryn A Skelding et al.
Advances in experimental medicine and biology, 740, 703-730 (2012-03-29)
Calcium/calmodulin-stimulated protein kinases can be classified as one of two types - restricted or multifunctional. This family of kinases contains several structural similarities: all possess a calmodulin binding motif and an autoinhibitory region. In addition, all of the calcium/calmodulin-stimulated protein
M Amin-ul Mannan et al.
Journal of molecular biology, 425(12), 2083-2099 (2013-04-02)
The endoplasmic reticulum transmembrane receptor Ire1 senses over-accumulation of unfolded proteins in the endoplasmic reticulum and initiates the unfolded protein response (UPR). The cytoplasmic portion of Ire1 has a protein kinase domain (KD) and a kinase extension nuclease (KEN) domain
S Camus et al.
Oncogene, 31(39), 4333-4342 (2011-12-20)
Angiogenesis is essential for development and tumor progression. With the aim of identifying new compound inhibitors of the angiogenesis process, we used an established enhanced green fluorescent protein-transgenic zebrafish line to develop an automated assay that enables high-throughput screening of

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