Human CD4 protein (Recombinant) (C-His) (STJP000855)
SPECIFICATIONS
HostHEK293 cells
ConjugationUnconjugated
ImmunogenRecombinant Human sCD4 Protein is produced by HEK293 expression system. The target protein is expressed with sequence (Lys26-Trp390) of human sCD4 (Accession #NP_000607.1) fused with a 6×His tag at the C-terminus.
General Information
| Short Description | Recombinant-Human CD4-C-His protein was developed in hek293 cells using the region Lys26-Trp390. For use in research applications. |
| Host | HEK293 cells |
| Note | STRICTLY FOR FURTHER SCIENTIFIC RESEARCH USE ONLY (RUO). MUST NOT TO BE USED IN DIAGNOSTIC OR THERAPEUTIC APPLICATIONS. |
Product Properties
| Conjugation | Unconjugated |
| Formulation | Lyophilised from a 0.22 Mu m filtered solution of PBS, pH 7.4. |
| Storage Instruction | Store at-20°C for up to 1 year from the date of receipt, and avoid repeat freeze-thaw cycles. |
| Immunoreactivity | Measured by its binding ability in a functional ELISA. Immobilized Human CD4 Protein at 1 Mu g/mL (100 Mu L/well) can bind CD4 Rabbit mAb with a linear range of 0.006-0.18 ng/mL. |
| Determination Method | < 0.1 EU/Mu g of the protein by LAL method. |
Target Information
| Gene Symbol | CD4 |
| Gene ID | 920 |
| Uniprot ID | CD4_HUMAN |
| Immunogen | Recombinant Human sCD4 Protein is produced by HEK293 expression system. The target protein is expressed with sequence (Lys26-Trp390) of human sCD4 (Accession #NP_000607.1) fused with a 6×His tag at the C-terminus. |
| Immunogen Region | Lys26-Trp390 |
| Immunogen Sequence | KKVVLGKKGDTVELTCTASQ KKSIQFHWKNSNQIKILGNQ GSFLTKGPSKLNDRADSRRS LWDQGNFPLIIKNLKIEDSD TYICEVEDQKEEVQLLVFGL TANSDTHLLQGQSLTLTLES PPGSSPSVQCRSPRGKNIQG GKTLSVSQLELQDSGTWTCT VLQNQKKVEFKIDIVVLAFQ KASSIVYKKEGEQVEFSFPL AFTVEKLTGSGELWWQAERA SSSKSWITFDLKNKEVSVK |
Additional Info
| Tissue Specificity | Highly expressed in T-helper cells. The presence of CD4 is a hallmark of T-helper cells which are specialized in the activation and growth of cytotoxic T-cells, regulation of B cells, or activation of phagocytes. CD4 is also present in other immune cells such as macrophages, dendritic cells or NK cells. |
| Post Translational Modifications | Palmitoylation and association with LCK contribute to the enrichment of CD4 in lipid rafts. Phosphorylated by PKC.phosphorylation at Ser-433 plays an important role for CD4 internalization. |
| Function | Integral membrane glycoprotein that plays an essential role in the immune response and serves multiple functions in responses against both external and internal offenses. In T-cells, functions primarily as a coreceptor for MHC class II molecule:peptide complex. The antigens presented by class II peptides are derived from extracellular proteins while class I peptides are derived from cytosolic proteins. Interacts simultaneously with the T-cell receptor (TCR) and the MHC class II presented by antigen presenting cells (APCs). In turn, recruits the Src kinase LCK to the vicinity of the TCR-CD3 complex. LCK then initiates different intracellular signaling pathways by phosphorylating various substrates ultimately leading to lymphokine production, motility, adhesion and activation of T-helper cells. In other cells such as macrophages or NK cells, plays a role in differentiation/activation, cytokine expression and cell migration in a TCR/LCK-independent pathway. Participates in the development of T-helper cells in the thymus and triggers the differentiation of monocytes into functional mature macrophages. (Microbial infection) Primary receptor for human immunodeficiency virus-1 (HIV-1). Down-regulated by HIV-1 Vpu. Acts as a receptor for Human Herpes virus 7/HHV-7. |
| Protein Name | T-Cell Surface Glycoprotein Cd4T-Cell Surface Antigen T4/Leu-3Cd Antigen Cd4 |
| Database Links | Reactome: R-HSA-1462054Reactome: R-HSA-167590Reactome: R-HSA-173107Reactome: R-HSA-180534Reactome: R-HSA-202424Reactome: R-HSA-202427Reactome: R-HSA-202430Reactome: R-HSA-202433Reactome: R-HSA-389948Reactome: R-HSA-449836Reactome: R-HSA-8856825Reactome: R-HSA-8856828 |
| Cellular Localisation | Cell MembraneSingle-Pass Type I Membrane ProteinLocalizes To Lipid RaftsRemoved From Plasma Membrane By Hiv-1 Nef Protein That Increases Clathrin-Dependent Endocytosis Of This Antigen To Target It To Lysosomal DegradationCell Surface Expression Is Also Down-Modulated By Hiv-1 Envelope Polyprotein Gp160 That Interacts WithAnd Sequesters Cd4 In The Endoplasmic Reticulum |
| Alternative Protein Names | T-Cell Surface Glycoprotein Cd4 proteinT-Cell Surface Antigen T4/Leu-3 proteinCd Antigen Cd4 proteinCD4 protein |
Information sourced from Uniprot.org