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M3003

Sigma-Aldrich

Myokinase from rabbit muscle

ammonium sulfate suspension, 1,500-3,000 units/mg protein (biuret)

Synonym(s):

ATP: AMP phosphotransferase, Adenylate Kinase

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About This Item

CAS Number:
9013-02-9
Enzyme Commission number:
2.7.4.3 (BRENDA, IUBMB)
EC Number:
232-743-3
MDL number:
MFCD00131644
UNSPSC Code:
12352204
eCl@ss:
32160410
NACRES:
NA.54

biological source

rabbit muscle

form

ammonium sulfate suspension

specific activity

1,500-3,000 units/mg protein (biuret)

mol wt

21 kDa

foreign activity

3-phosphoglyceric phosphokinase ≤0.05%
lactic dehydrogenase and pyruvate kinase ≤0.01%

storage temp.

2-8°C

General description

Research area: Cell Signaling
Myokinase, also called Adenylate kinase or ADK, is a phosphotransferase enzyme. It belongs to the family of nucleoside monophosphate kinases. Myokinase is an enzyme that can be found in skeletal muscle and acts as a phosphotransferase agitator.

Application

Myokinase has been used:

  • in a study to assess its reaction with the mercurials p-hydroxymercuribenzoate and p-mercuribenzenesulfonate
  • in a study to investigate the ligand-binding properties of its peptide fragments
  • as one of the components in the ATP generation solution for the quantification of 3’3’-c-di-AMP using an AMP-Luciferase assay

Biochem/physiol Actions

Myokinase or adenylate kinases, play a crucial role in regulating energy metabolism within cells and balancing adenine nucleotide ratios in different cellular compartments.

Myokinase is a key enzyme involved with adenine nucleotide metabolism. The action of myokinase insures that the adenine nucleotides (ATP, ADP, and AMP) are maintained in equilibrium in the cytosol.
Myokinase catalyzes the following reaction:ADP + ADP → ATP + AMP
Rabbit muscle myokinase can be inactivated by treatment with dithiobis-(2-nitrobenzoic) acid which alters methionine residues critical to myokinase activity.

Unit Definition

One unit will convert 2.0 μmoles of ADP to ATP+AMP per min at pH 7.6 at 37°C.

Physical form

Suspension in 3.2 M (NH4)2SO4 solution containing 0.001 M EDTA, pH 6.0

Storage Class Code

10 - Combustible liquids

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

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Myokinase, ATP-AMP Transphosphorylase.
Noda, L., and Kuby, S.A.
Methods in Enzymology, 6, 223-230 (1962)
Qingfeng Chen et al.
The Journal of biological chemistry, 285(39), 29780-29786 (2010-07-20)
The GH3 family of acyl-acid-amido synthetases catalyze the ATP-dependent formation of amino acid conjugates to modulate levels of active plant hormones, including auxins and jasmonates. Initial biochemical studies of various GH3s show that these enzymes group into three families based
Irmgard U Haussmann et al.
Nature communications, 13(1), 1209-1209 (2022-03-10)
Cap-adjacent nucleotides of animal, protist and viral mRNAs can be O-methylated at the 2' position of the ribose (cOMe). The functions of cOMe in animals, however, remain largely unknown. Here we show that the two cap methyltransferases (CMTr1 and CMTr2)
The many isoforms of human adenylate kinases
Panayiotou C, et al.
Journal of Separation Science, 49, 75-83 (2014)
S A Kuby et al.
Journal of protein chemistry, 8(4), 549-562 (1989-08-01)
Two peptide fragments, derived from the head and tail of rabbit muscle myokinase, were found to possess remarkable and specific ligand-binding properties (Hamada et al., 1979). By initiating systematic syntheses and measurements of equilibrium substrate-binding properties of these two sets
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