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| Description | |
|---|---|
| Catalogue Number | 05-373-25UG |
| Brand Family | Upstate |
| Trade Name |
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| Description | Anti-Cyclin B1 |
| Alternate Names |
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| Background Information | G2/mitotic-specific cyclin-B1 (UniProt: P14635; also known as Cyclin B1) is encoded by the CCNB1 (also known as CCNB) gene (Gene ID: 891) in human. Cyclins are the regulatory subunits of the cell cycle-dependent kinases (CDKs) that are responsible for the phosphorylation of several cellular targets. Cyclins contain the nuclear localization sequence (NLS) that help move CDKs into the nucleus. They also contain PEST (Pro, Glu, Ser, and Thr) sequences that target them for degradation by the ubiquitin-proteasomal pathway. Once the CDKs have completed their role, they undergo a rapid programmed proteolysis via ubiquitin-mediated delivery to the proteasome complex. Cyclin B1, a regulatory protein involved in mitosis, complexes with CDK1 to form the maturation-promoting factor (MPF). It is shown to be essential for the control of the cell cycle at the G2/M (mitosis) transition. It accumulates steadily during G2 phase and is abruptly destroyed at mitosis. Hence, the cyclin B1-CDK1 complex is considered to be a key regulator for mitotic entry. This complex phosphorylates a number of proteins prior to mitotic entry. Although five serine phosphorylation sites are described for cyclin B1, (Ser 116, 126, 128, 133, and 147), serine 133 phosphorylation by PLK1 regulates the entry of Cyclin B1-CDK1 complex into the nucleus during prophase. At the end of mitosis, cyclin B1 is rapidly removed by a ubiquitin ligase (anaphase-promoting complex/cyclosome) loaded with the targeting subunit CDC20. Activated cyclin B1-CDK1 complex is reported to catalyze its own destruction by stimulating the activity of APC. (Ref.: Van Zon, W., et al. (2010). J. Cell. Biol. 190(4); 587-602; Yuan, J., et al. (2004). Oncogene 23(34); 5843-5852). |
| Product Information | |
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| Format | Purified |
| Control |
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| Presentation | Protein G purified mouse IgGs in storage buffer containing 0.1 M Tris-glycine, pH 7.4, 0.15 M NaCl, 0.05% sodium azide. Frozen at -20°C. |
| Quality Level | MQ100 |
| Applications | |
|---|---|
| Application | Anti-Cyclin B1 Antibody, clone GNS3 (8A5D12) is a Mouse Monoclonal Antibody for detection of Cyclin B1 also known as G2/mitotic-specific cyclin B1 & has been validated in Immunohistochemistry, Immunoprecipitation and Western Blotting. |
| Key Applications |
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| Application Notes | Immunoprecipitation: 2 μg of a previous lot immunoprecipitated human cyclin B1 and cdc2 kinase from 500 μg of A431 RIPA lysate as determined by a subsequent immunoblot of the immunoprecipitate using anti-cdk1/cdc2 (PSTAIR), (Catalog # 06-923). Western Blotting Analysis: 0.1 mg/mL of this antibody detected Cyclin B1 in A431 cell lysate. Immunohistochemistry (Paraffin) Analysis: A 1:250 and 1:50 dilutions of this antibody detected Cyclin B1 in Human tonsil and Human bone marrow tissue sections, respectively. |
| Biological Information | |
|---|---|
| Immunogen | Recombinant human cyclin B1 |
| Clone | GNS3 (8A5D12) |
| Concentration | Please refer to lot specific datasheet. |
| Host | Mouse |
| Specificity | This antibody is specific for human cyclin B1, Mr 58 kDa. Does not cross-react with cyclin A or cyclin D. |
| Isotype | mixed IgGs |
| Species Reactivity |
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| Species Reactivity Note | In addition to human, weak species cross-reactivity was observed with mouse. |
| Antibody Type | Monoclonal Antibody |
| Entrez Gene Number |
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| Entrez Gene Summary | The protein encoded by this gene is a regulatory protein involved in mitosis. The gene product complexes with p34(cdc2) to form the maturation-promoting factor (MPF). Two alternative transcripts have been found, a constitutively expressed transcript and a cell cycle-regulated transcript, that is expressed predominantly during G2/M phase. The different transcripts result from the use of alternate transcription initiation sites. |
| Gene Symbol |
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| Purification Method | Protein G Chromatography |
| UniProt Number |
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| UniProt Summary | FUNCTION: SwissProt: P14635 # Essential for the control of the cell cycle at the G2/M (mitosis) transition. SIZE: 433 amino acids; 48337 Da SUBUNIT: Interacts with the CDC2 protein kinase to form a serine/threonine kinase holoenzyme complex also known as maturation promoting factor (MPF). The cyclin subunit imparts substrate specificity to the complex. Binds HEI10. Interacts with catalytically active RALBP1 and CDC2 during mitosis to form an endocytotic complex during interphase. SUBCELLULAR LOCATION: Cytoplasm. Nucleus. Centrosome. DEVELOPMENTAL STAGE: Accumulates steadily during G2 and is abruptly destroyed at mitosis. PTM: Ubiquitinated by the SCF(NIPA) complex during interphase, leading to its destruction. Not ubiquitinated during G2/M phases. SIMILARITY: SwissProt: P14635 ## Belongs to the cyclin family. Cyclin AB subfamily. |
| Molecular Weight | 58 kDa |
| Product Usage Statements | |
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| Quality Assurance | Routinely evaluated by western blot analysis on RIPA lysate from human A431 carcinoma cells. Western Blot Analysis: 0.5-2 μg/mL of this lot detected cyclin B1 in RIPA lysates from human A431 carcinoma cells. |
| Usage Statement |
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| Storage and Shipping Information | |
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| Storage Conditions | Stable for 1 year at -20°C from date of receipt. Handling Recommendations: Upon receipt, and prior to removing the cap, centrifuge the vial and gently mix the solution. Aliquot into microcentrifuge tubes and store at -20°C. Avoid repeated freeze/thaw cycles, which may damage IgG and affect product performance. |
| Packaging Information | |
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| Material Size | 25 μg |