GC1qR (C1QBP) Blocking Peptide | C1QBP blocking peptide

GC1qR (C1QBP) Antibody (C-term) Blocking peptide

• Gene Names: C1QBP; p32; HABP1; gC1qR; GC1QBP; SF2p32; gC1Q-R
• Synonyms: GC1qR (C1QBP); GC1qR (C1QBP) Antibody (C-term) Blocking peptide; Complement component 1 Q subcomponent-binding protein; mitochondrial; ASF/SF2-associated protein p32; Glycoprotein gC1qBP; C1qBP; Hyaluronan-binding protein 1; Mitochondrial matrix protein p32; gC1q-R protein; p33; C1QBP; GC1QBP; HABP1; SF2P32; C1QBP blocking peptide

• Specificity: The synthetic peptide sequence used to generate the antibody was selected from the C-term region of human C1QBP. A 10 to 100 fold molar excess to antibody is recommended. Precise conditions should be optimized for a particular assay.
• Form/Format: Synthetic peptide was lyophilized with 100% acetonitrile and is supplied as a powder. Reconstitute with 0.1 ml DI water for a final concentration of 1 mg/ml.
• Sequence Length: 282

• Cellular Location: Mitochondrion matrix. Nucleus. Cell membrane; Peripheral membrane protein; Extracellular side Secreted. Cytoplasm. Nucleus, nucleolus. Note: Seems to be predominantly localized to mitochondria. Secreted by activated lymphocytes
• Tissue Location: Expressed on cell surface of peripheral blood cells (at protein level); Surface expression is reported for macrophages and monocyte-derived dendritic cells
• Preparation and Storage: Maintain refrigerated at 2-8 degree C for up to 6 months. For long term storage store at -20 degree C.

Related Product Information for C1QBP blocking peptide

Is believed to be a multifunctional and multicompartmental protein involved in inflammation and infection processes, ribosome biogenesis, regulation of apoptosis, transcriptional regulation and pre-mRNA splicing. At the cell surface is thought to act as an endothelial receptor for plasma proteins of the complement and kallikrein-kinin cascades. Putative receptor for C1q; specifically binds to the globular "heads" of C1q thus inhibiting C1; may perform the receptor function through a complex with C1qR/CD93. In complex with cytokeratin-1/KRT1 is a high affinity receptor for kininogen-1/HMWK. Can also bind other plasma proteins, such as coagulation factor XII leading to its autoactivation. May function to bind initially fluid kininogen-1 to the cell membrane. The secreted form may enhance both extrinsic and intrinsic coagulation pathways. It is postulated that the cell surface form requires docking with transmembrane proteins for downstream signaling which might be specific for a cell-type or response. By acting as C1q receptor is involved in chemotaxis of immature dendritic cells and neutrophils and is proposed to signal through CD209/DC-SIGN on immature dendritic cells, through integrin alpha-4/beta-1 during trophoblast invasion of the decidua, and through integrin beta-1 during endothelial cell adhesion and spreading. Signaling involved in inhibition of innate immune response is implicating the PI3K-AKT/PKB pathway. In mitochondrial translation may be involved in formation of functional 55S mitoribosomes; the function seems to involve its RNA-binding activity. May be involved in the nucleolar ribosome maturation process; the function may involve the exchange of FBL for RRP1 in the association with pre-ribosome particles. Involved in regulation of RNA splicing by inhibiting the RNA-binding capacity of SRSF1 and its phosphorylation. Is required for the nuclear translocation of splicing factor U2AF1L4. Involved in regulation of CDKN2A- and HRK-mediated apoptosis. Stabilizes mitochondrial CDKN2A isoform smARF. May be involved in regulation of FOXC1 transcriptional activity and NFY/CCAAT-binding factor complex-mediated transcription. In infection processes acts as an attachment site for microbial proteins, including Listeria monocytogenes internalin B and Staphylococcus aureus protein A. May play a role in antibacterial defense as it can bind to cell surface hyaluronan and inhibit Streptococcus pneumoniae hyaluronate lyase. Involved in replication of Rubella virus. May be involved in modulation of the immune response; ligation by HCV core protein is resulting in suppresion of interleukin-12 production in monocyte-derived dendritic cells. Involved in regulation of antiviral response by inhibiting DDX58- and IFIH1- mediated signaling pathways probably involving its association with MAVS after viral infection. Involved in HIV-1 replication, presumably by contributing to splicing of viral RNA.

NCBI and Uniprot Product Information

• NCBI GI #: 730772
• NCBI GeneID: 708
• UniProt Accession #: Q07021; Q2HXR8; Q9NNY8
• Molecular Weight: 31,362 Da
• NCBI Official Full Name: Complement component 1 Q subcomponent-binding protein, mitochondrial
• NCBI Official Synonym Full Names: complement C1q binding protein
• NCBI Official Symbol: C1QBP
• NCBI Official Synonym Symbols: p32; HABP1; gC1qR; GC1QBP; SF2p32; gC1Q-R
• NCBI Protein Information: complement component 1 Q subcomponent-binding protein, mitochondrial
• UniProt Protein Name: Complement component 1 Q subcomponent-binding protein, mitochondrial
• Protein Family: Complement component 1 Q subcomponent-binding protein
• UniProt Gene Name: C1QBP
• UniProt Synonym Gene Names: GC1QBP; HABP1; SF2P32; C1qBP
• UniProt Entry Name: C1QBP_HUMAN

NCBI Description

The human complement subcomponent C1q associates with C1r and C1s in order to yield the first component of the serum complement system. The protein encoded by this gene is known to bind to the globular heads of C1q molecules and inhibit C1 activation. This protein has also been identified as the p32 subunit of pre-mRNA splicing factor SF2, as well as a hyaluronic acid-binding protein. [provided by RefSeq, Jul 2008]

Uniprot Description

C1QBP: a multifunctional and multicompartmental protein involved in inflammation and infection processes, ribosome biogenesis, regulation of apoptosis, transcriptional regulation and pre-mRNA splicing. Originally identified via its binding interactions with Splicing Factor (SF-2). Multiple, diverse binding partners of C1QBP were subsequently identified, including the globular heads of complement component C1q, hyaluronic acid, selected protein kinases, the tumor suppressor ARF, and multiple antigens of bacterial and viral origin. Overexpressed in a number of cancer cell types, and has been implicated in the Warburg effect, whereby cancer cells shift their metabolism from oxidative phosphorylation to glycolysis. Inhibits the Mitochondrial Permeability Transition (MPT) pore, possibly serving a protective function against damage from oxidative stress. Binding to C1q inhibits C1. In complex with cytokeratin-1/KRT1 is a high affinty receptor for kininogen-1/HMWK. The secreted form may enhance both extrinsic and intrinsic coagulation pathways. The cell surface form may require docking with transmembrane proteins for downstream signaling which might be specific for a cell-type or response. Belongs to the MAM33 family.

Protein type: Motility/polarity/chemotaxis; Receptor, misc.; Nucleolus; Mitochondrial

Chromosomal Location of Human Ortholog: 17p13.3

Cellular Component: cell surface; cytoplasm; cytosol; membrane; mitochondrion; nucleus; plasma membrane

Molecular Function: adrenergic receptor binding; complement component C1q binding; hyaluronic acid binding; kininogen binding; mRNA binding; protein binding; transcription corepressor activity; transcription factor binding

Biological Process: blood coagulation, intrinsic pathway; immune response; mature ribosome assembly; negative regulation of defense response to virus; negative regulation of interferon-gamma production; negative regulation of interleukin-12 production; negative regulation of nuclear mRNA splicing, via spliceosome; negative regulation of transcription from RNA polymerase II promoter; phosphoinositide 3-kinase cascade; positive regulation of apoptosis; positive regulation of cell adhesion; positive regulation of protein kinase B signaling cascade; regulation of complement activation