| Gene Symbol | C1QBP |
|---|---|
| Entrez Gene | 708 |
| Alt Symbol | GC1QBP, HABP1, SF2p32, gC1Q-R, gC1qR, p32 |
| Species | Human |
| Gene Type | protein-coding |
| Description | complement component 1, q subcomponent binding protein |
| Other Description | ASF/SF2-associated protein p32|C1q globular domain-binding protein|complement component 1 Q subcomponent-binding protein, mitochondrial|glycoprotein gC1qBP|hyaluronan-binding protein 1|mitochondrial matrix protein p32|p33|splicing factor SF2-associated protein |
| Swissprots | Q07021 Q2HXR8 Q9NNY8 |
| Accessions | AAK26580 ABC79624 EAW90335 EAW90336 EAW90337 Q07021 AF275902 AAF78763 AJ297362 CAB95947 AK291516 BAF84205 BC000435 AAH00435 BC013731 AAH13731 BT019898 AAV38701 BT019899 AAV38702 DQ891331 ABM82257 DQ893366 ABM84292 DQ894514 ABM85440 DQ896683 ABM87682 L04636 AAA16315 X75913 CAA53512 NM_001212 NP_001203 |
| Function | 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-typ |
| Subcellular 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 Specificity | Expressed on cell surface of peripheral blood cells (at protein level); Surface expression is reported for macrophages and monocyte-derived dendritic cells. {ECO:0000269|PubMed:12574814, ECO:0000269|PubMed:8662673}. |
| Top Pathways | Herpes simplex infection |