CDB25:0003192 C1QA — LRP1

Experimentally validated in Human; Orthology-inferred in Mouse, Rat, Frog, Zebrafish, Chicken, Macaque, Pig, Dog, Cow, Chimp, Horse, Marmoset, Sheep

Title

Journal:; Year Published:

Abstract

C1q and mannose binding lectin engagement of cell surface calreticulin and CD91 initiates macropinocytosis and uptake of apoptotic cells.

The Journal of experimental medicine, 2001; PubMed, Homo sapiens C1QA — Homo sapiens LRP1
ABSTRACT: Removal of apoptotic cells is essential for maintenance of tissue homeostasis, organogenesis, remodeling, development, and maintenance of the immune system, protection against neoplasia, and resolution of inflammation. The mechanisms of this removal involve recognition of the apoptotic cell surface and initiation of phagocytic uptake into a variety of cell types. Here we provide evidence that C1q and mannose binding lectin (MBL), a member of the collectin family of proteins, bind to apoptotic cells and stimulate ingestion of these by ligation on the phagocyte surface of the multifunctional protein, calreticulin (also known as the cC1qR), which in turn is bound to the endocytic receptor protein CD91, also known as the alpha-2-macroglobulin receptor. Use of these proteins provides another example of apoptotic cell clearance mediated by pattern recognition molecules of the innate immune system. Ingestion of the apoptotic cells through calreticulin/CD91 stimulation is further shown to involve the process of macropinocytosis, implicated as a primitive and relatively nonselective uptake mechanism for C1q- and MBL-enhanced engulfment of whole, intact apoptotic cells, as well as cell debris and foreign organisms to which these molecules may bind.
Basic Information on C1QA
Ligand Name: complement C1q A chain
Other Symbols: N/A
Ligand Location: secreted based on perplexity, uniprot
HGNC Gene Symbol Report: C1QA
GeneCards: C1QA
Functional Annotations for C1QA
Gene Ontologies: PAN-GO, AmiGO 2
Expression Profile: Human Protein Atlas (RNA and protein), Human Cell Atlas (RNA), GEPIA cancer vs normal (RNA), GeneCards (RNA and protein)
Disease Annotations: MalaCards, OMIM, Open Targets Platform, DISEASES (text mining), AI summary (LLM)
Interactions with other Receptors for C1QA
C1QA — CD93 ・ C1QA — CR1 ・ C1QA — CD33 ・ C1QA — ADCY5 ・ C1QA — ADGRB1 ・ C1QA — CD44 ・ C1QA — DDR1 ・ C1QA — GPR62 ・ C1QA — LAIR1 ・ C1QA — MET
Basic Information on LRP1
Receptor Name: LDL receptor related protein 1
Other Symbols: APR, A2MR, LRP, CD91, LRP1A, APOER, IGFBP3R1, IGFBP-3R
Receptor Location: cell membrane based on hpa, perplexity, uniprot
HGNC Gene Symbol Report: LRP1
GeneCards: LRP1
Functional Annotations for LRP1
Gene Ontologies: PAN-GO, AmiGO 2
Expression Profile: Human Protein Atlas (RNA and protein), Human Cell Atlas (RNA), GEPIA cancer vs normal (RNA), GeneCards (RNA and protein)
Disease Annotations: MalaCards, OMIM, Open Targets Platform, DISEASES (text mining), AI summary (LLM)
Interactions with other Ligands for LRP1
A2M — LRP1 ・ APOE — LRP1 ・ APP — LRP1 ・ C1QB — LRP1 ・ C3 — LRP1 ・ C4BPA — LRP1 ・ CALR — LRP1 ・ CCN2 — LRP1 ・ F8 — LRP1 ・ F9 — LRP1 ・ FCN2 — LRP1 ・ HSP90B1 — LRP1 ・ LIPC — LRP1 ・ LPL — LRP1 ・ LRPAP1 — LRP1 ・ LTF — LRP1 ・ MDK — LRP1 ・ MMP13 — LRP1 ・ MMP9 — LRP1 ・ PDGFB — LRP1 ・ PLAT — LRP1 ・ PLAU — LRP1 ・ PSAP — LRP1 ・ SERPINA1 — LRP1 ・ SERPINC1 — LRP1 ・ SERPINE1 — LRP1 ・ SERPINE2 — LRP1 ・ SERPING1 — LRP1 ・ TFPI — LRP1 ・ THBS1 — LRP1 ・ ADAMTS1 — LRP1 ・ APOC3 — LRP1 ・ CCN1 — LRP1 ・ CEMIP — LRP1 ・ HGFAC — LRP1 ・ HMGB1 — LRP1 ・ HMGB2 — LRP1 ・ HPX — LRP1 ・ HSP90AA1 — LRP1 ・ HSPA1A — LRP1 ・ HSPA4 — LRP1 ・ IGFBP7 — LRP1 ・ LIF — LRP1 ・ MBL2 — LRP1 ・ MMP1 — LRP1 ・ PF4 — LRP1 ・ PLAUR — LRP1 ・ SERPIND1 — LRP1 ・ SFTPA1 — LRP1 ・ SFTPD — LRP1 ・ SLIT2 — LRP1 ・ SPARC — LRP1 ・ TIMP1 — LRP1 ・ TIMP3 — LRP1 ・ TNFAIP6 — LRP1 ・ VWF — LRP1
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