Adenylate kinase isoenzyme 4, mitochondrial, also known as ATP-AMP transphosphorylase, Adenylate kinase 3-like, AK4 and AK3L1, is a member the adenylate kinase family. AK4/ AK3L1 is localized to the mitochondrial matrix. Adenylate kinases regulate the adenine and guanine nucleotide compositions within a cell by catalyzing the reversible transfer of phosphate group among these nucleotides. Five isozymes of adenylate kinase have been identified in vertebrates. Expression of these isozymes is tissue-specific and developmentally regulated. AK4/ AK3L1 catalyzes the reversible transfer of the terminal phosphate group between ATP and AMP. It may also be active with GTP. Adenylate kinase 4 ( AK4/ AK3L1 ) is a unique member with no enzymatic activity in the adenylate kinase (AK) family although it shares high sequence homology with other AKs. It remains unclear what physiological function AK4 might play or why it is enzymatically inactive. AK4/ AK3L1 retains the capability of binding nucleotides. It has a glutamine residue instead of a key arginine residue in the active site well conserved in other AKs. The enzymatically inactive AK4 is a stress responsive protein critical to cell survival and proliferation. AK4/ AK3L1 is likely that the interaction with the mitochondrial inner membrane protein ANT is important for AK4 to exert the protective benefits to cells under stress. AK4/ AK3L1 also acts on the specific mechanism of energy metabolism rather than control of the homeostasis of the ADP pool ubiquitously.
Tag
His tag ; GST tag
Description
A DNA sequence encoding the human AK4 (P27144-1) (Ala 2-Tyr 223) was fused with the N-terminal polyhistidine-tagged GST tag at the N-terminus.
Regulatory
RUO
Host
Baculovirus-Insect Cells
Endotoxin Level
< 1.0 EU per μg of the protein as determined by the LAL method
Nature
Recombinant
Shipping
Kinases are highly recommended to be shipped at frozen temperature with blue ice or dry ice.Shipment made at ambient temperature may seriously affect the activity of the ordered products.
Buffer
Supplied as sterile 20mM Tris, 500mM NaCl, pH 8.0
Description
Please refer to the printed manual for detailed information.
Purity
> 94 % as determined by SDS-PAGE
Expiry Date
Samples are stable for up to twelve months from date of receipt at -70℃
Immunogen Species
Homo Sapiens (Human)
Attachment
Reviews of Recombinant Human AK4/AK3L1 Protein (His & GST Tag)