Overview
c-Jun is a proto-oncogene that encodes a protein component of the AP-1 transcription factor complex. As a basic leucine zipper (bZIP) transcription factor, it regulates gene expression in response to various stimuli including cytokines, growth factors, and stress signals. The protein plays a pivotal role in numerous cellular processes including proliferation, differentiation, and apoptosis. Its dysregulation has been implicated in various cancers and inflammatory diseases, making it a significant target for biomedical research.
Physical and Chemical Properties
c-Jun is a phosphoprotein with a molecular weight of approximately 35-40 kDa, though this can vary depending on post-translational modifications. The protein contains several functional domains including the DNA-binding domain and leucine zipper domain that mediates dimerization with other AP-1 family members. As a research reagent, c-Jun is typically supplied as a lyophilized powder or in buffered solutions. Its solubility depends on the formulation, but it generally dissolves readily in standard physiological buffers. The protein is sensitive to proteolytic degradation and requires proper storage conditions to maintain stability.
Main Applications
In research settings, c-Jun is primarily used to study signal transduction pathways, particularly the JNK (c-Jun N-terminal kinase) pathway. It serves as a valuable tool for investigating cellular responses to stress, growth factors, and oncogenic transformation. The protein is also crucial in cancer research, where its overexpression or constitutive activation is associated with tumor progression. Additionally, c-Jun antibodies and recombinant proteins are widely used in techniques such as Western blotting, EMSA (electrophoretic mobility shift assay), and chromatin immunoprecipitation.
Safety and Storage
While c-Jun itself is not classified as hazardous, standard laboratory precautions should be followed when handling. This includes wearing appropriate personal protective equipment and working in properly ventilated areas. For storage, aliquoting is recommended to avoid repeated freeze-thaw cycles. Lyophilized proteins should be reconstituted according to manufacturer instructions and unused portions stored at -20°C or -80°C. Long-term stability varies by formulation but typically ranges from 6 months to several years when properly stored.
B2B Procurement Guide
When procuring c-Jun for research purposes, consider the protein source (recombinant vs. native), purity level, and available validation data. Recombinant versions are commonly preferred for consistency and can be produced in E. coli, mammalian, or insect cell systems. Key specifications to verify include concentration, biological activity (often confirmed by DNA-binding assays), and endotoxin levels. For antibody production or structural studies, consider whether full-length or domain-specific fragments better suit your needs. Lead times can vary from stock items (1-2 weeks) to custom expressions (4-8 weeks).
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