Recombinant Human Calcium-activated potassium channel subunit beta-4(KCNMB4),partial

Code CSB-YP774820HU
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Source Yeast
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Code CSB-EP774820HU
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Source E.coli
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Code CSB-EP774820HU-B
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Source E.coli
Conjugate Avi-tag Biotinylated
E. coli biotin ligase (BirA) is highly specific in covalently attaching biotin to the 15 amino acid AviTag peptide. This recombinant protein was biotinylated in vivo by AviTag-BirA technology, which method is BriA catalyzes amide linkage between the biotin and the specific lysine of the AviTag.
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Code CSB-BP774820HU
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Source Baculovirus
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Code CSB-MP774820HU
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Source Mammalian cell
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Product Details

Purity >85% (SDS-PAGE)
Target Names KCNMB4
Uniprot No. Q86W47
Alternative Names BK channel subunit beta 4; BK channel subunit beta-4; BKbeta4; Calcium activated potassium channel beta 4 subunit; Calcium activated potassium channel subfamily M subunit beta 4; Calcium activated potassium channel subunit beta 4; Calcium-activated potassium channel; Calcium-activated potassium channel subunit beta-4; Charybdotoxin receptor subunit beta 4; Charybdotoxin receptor subunit beta-4; Hbeta4; K(VCA)beta 4; K(VCA)beta-4; KCMB4_HUMAN; KCNMB 4; Kcnmb4; Large conductance calcium dependent potassium ion channel beta 4 subunit; Maxi K channel subunit beta 4; Maxi K channel subunit beta-4; Potassium large conductance calcium activated channel subfamily M beta member 4; Slo beta 4; Slo-beta-4; subfamily M subunit beta-4
Species Homo sapiens (Human)
Protein Length Partial
Tag Info The following tags are available.
N-terminal His-tagged
The tag type will be determined during production process. If you have specified tag type, please tell us and we will develop the specified tag preferentially.
Form Lyophilized powder
Note: We will preferentially ship the format that we have in stock, however, if you have any special requirement for the format, please remark your requirement when placing the order, we will prepare according to your demand.
Buffer before Lyophilization Tris/PBS-based buffer, 6% Trehalose, pH 8.0
Reconstitution We recommend that this vial be briefly centrifuged prior to opening to bring the contents to the bottom. Please reconstitute protein in deionized sterile water to a concentration of 0.1-1.0 mg/mL.We recommend to add 5-50% of glycerol (final concentration) and aliquot for long-term storage at -20℃/-80℃. Our default final concentration of glycerol is 50%. Customers could use it as reference.
and FAQs
Protein FAQs
Storage Condition Store at -20°C/-80°C upon receipt, aliquoting is necessary for mutiple use. Avoid repeated freeze-thaw cycles.
Shelf Life The shelf life is related to many factors, storage state, buffer ingredients, storage temperature and the stability of the protein itself.
Generally, the shelf life of liquid form is 6 months at -20°C/-80°C. The shelf life of lyophilized form is 12 months at -20°C/-80°C.
Lead Time Delivery time may differ from different purchasing way or location, please kindly consult your local distributors for specific delivery time.
Note: All of our proteins are default shipped with normal blue ice packs, if you request to ship with dry ice, please communicate with us in advance and extra fees will be charged.
Notes Repeated freezing and thawing is not recommended. Store working aliquots at 4°C for up to one week.
Datasheet Please contact us to get it.

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Target Background

Regulatory subunit of the calcium activated potassium KCNMA1 (maxiK) channel. Modulates the calcium sensitivity and gating kinetics of KCNMA1, thereby contributing to KCNMA1 channel diversity. Decreases the gating kinetics and calcium sensitivity of the KCNMA1 channel, but with fast deactivation kinetics. May decrease KCNMA1 channel openings at low calcium concentrations but increases channel openings at high calcium concentrations. Makes KCNMA1 channel resistant to 100 nM charybdotoxin (CTX) toxin concentrations.
Gene References into Functions
  1. Two recurrent fusion genes associated with the 12q locus, LRP1-SNRNP25 and KCNMB4-CCND3, were by RT-PCR, Sanger sequencing and FISH, and were found to be osteosarcoma specific in a validation cohort of 240 other sarcomas. PMID: 25300797
  2. Recombinant martentoxin selectively blocks KCNMA1/KCNMB4 channels. PMID: 24759175
  3. BK channel beta4 subunit influences sensitivity and tolerance to alcohol by altering its response to kinases PMID: 25190810
  4. Study shows that beta4 subunit of the MaxiK channel has no potential endocytic signal and 2 specific amino acids in the functional basic motif retention/retrieval trafficking signal at the C-terminus may play a role in controlling cellular excitability PMID: 24486049
  5. our data suggest that the rs398702 variant in the KCNMB4 gene is unlikely to influence significantly the risk of developing mesial temporal lobe epilepsy or its severity PMID: 23623847
  6. These results suggest that fast-gating, type I BK channels lacking beta4 can increase neuronal excitability in response to reduced phosphatase activity and activation of calcium channels. PMID: 21848922
  7. Structural basis for toxin resistance of beta4-associated calcium-activated potassium (BK) channels PMID: 18559348
  8. The beta4 subunit controls ethanol tolerance at the molecular, cellular, and behavioral levels, and could determine individual differences in alcohol abuse and alcoholism, as well as represent a therapeutic target for alcoholism. PMID: 18981408
  9. results argue that, for native mouse Slo3 channels, the beta4 subunit must be considered as a potential interaction partner and, furthermore, that KCNMB subunits may have functions unrelated to regulation of the Slo1 alpha subunit PMID: 19578543

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Subcellular Location Membrane; Multi-pass membrane protein.
Protein Families KCNMB (TC 8.A.14.1) family, KCNMB4 subfamily
Tissue Specificity Predominantly expressed in brain. In brain, it is expressed in the cerebellum, cerebral cortex, medulla, spinal cord, occipital pole, frontal lobe, temporal lobe, putamen, amygdala, caudate nucleus, corpus callosum, hippocampus, substantia nigra and thala
Database Links

HGNC: 6289

OMIM: 605223

KEGG: hsa:27345

STRING: 9606.ENSP00000258111

UniGene: Hs.525529

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