Biomaterial Database

Structure and functions of gp 140, the C3d/EBV receptor (CR2) of human B lymphocytes. 1986

R Frade

Analysis of the interaction of human C3 fragments with human B lymphoma cell line, led us to isolate gp 140, the C3 receptor of Raji cells. Rabbit anti-gp 140 was prepared against this highly purified receptor. Using these polyclonal antibodies, it was found that: gp 140 is the C3d receptor (CR2) which reacts with the C3d site expressed on C3d, C3dg, C3bi and at a less extent on C3b. Gp 140 is a specific marker of human B lymphocytes; gp 140 is also the Epstein-Barr virus receptor (EBVR); CR2 is a membrane site involved in B-cell regulation; and the C3d/C3dg receptor (CR2) of human B lymphocytes is distinct to the C3dg receptor (CR4) of human neutrophils.

UI	MeSH Term	Description	Entries
D009504	Neutrophils	Granular leukocytes having a nucleus with three to five lobes connected by slender threads of chromatin, and cytoplasm containing fine inconspicuous granules and stainable by neutral dyes.	LE Cells,Leukocytes, Polymorphonuclear,Polymorphonuclear Leukocytes,Polymorphonuclear Neutrophils,Neutrophil Band Cells,Band Cell, Neutrophil,Cell, LE,LE Cell,Leukocyte, Polymorphonuclear,Neutrophil,Neutrophil Band Cell,Neutrophil, Polymorphonuclear,Polymorphonuclear Leukocyte,Polymorphonuclear Neutrophil
D010446	Peptide Fragments	Partial proteins formed by partial hydrolysis of complete proteins or generated through PROTEIN ENGINEERING techniques.	Peptide Fragment,Fragment, Peptide,Fragments, Peptide
D011951	Receptors, Complement	Molecules on the surface of some B-lymphocytes and macrophages, that recognize and combine with the C3b, C3d, C1q, and C4b components of complement.	Complement Receptors,Complement Receptor,Complement Receptor Type 1,Receptor, Complement
D011991	Receptors, Virus	Specific molecular components of the cell capable of recognizing and interacting with a virus, and which, after binding it, are capable of generating some signal that initiates the chain of events leading to the biological response.	Viral Entry Receptor,Viral Entry Receptors,Virus Attachment Factor,Virus Attachment Factors,Virus Attachment Receptor,Virus Attachment Receptors,Virus Entry Receptor,Virus Entry Receptors,Virus Receptor,Virus Receptors,Attachment Factor, Virus,Attachment Factors, Virus,Attachment Receptor, Virus,Attachment Receptors, Virus,Entry Receptor, Viral,Entry Receptor, Virus,Entry Receptors, Viral,Entry Receptors, Virus,Receptor, Viral Entry,Receptor, Virus,Receptor, Virus Attachment,Receptor, Virus Entry,Receptors, Viral Entry,Receptors, Virus Attachment,Receptors, Virus Entry
D002051	Burkitt Lymphoma	A form of undifferentiated malignant LYMPHOMA usually found in central Africa, but also reported in other parts of the world. It is commonly manifested as a large osteolytic lesion in the jaw or as an abdominal mass. B-cell antigens are expressed on the immature cells that make up the tumor in virtually all cases of Burkitt lymphoma. The Epstein-Barr virus (HERPESVIRUS 4, HUMAN) has been isolated from Burkitt lymphoma cases in Africa and it is implicated as the causative agent in these cases; however, most non-African cases are EBV-negative.	African Lymphoma,Burkitt Cell Leukemia,Burkitt Tumor,Lymphoma, Burkitt,Burkitt Leukemia,Burkitt's Leukemia,Burkitt's Lymphoma,Burkitt's Tumor,Leukemia, Lymphoblastic, Burkitt-Type,Leukemia, Lymphocytic, L3,Lymphocytic Leukemia, L3,Burkitts Leukemia,Burkitts Lymphoma,Burkitts Tumor,L3 Lymphocytic Leukemia,L3 Lymphocytic Leukemias,Leukemia, Burkitt,Leukemia, Burkitt Cell,Leukemia, Burkitt's,Leukemia, L3 Lymphocytic,Lymphoma, African,Lymphoma, Burkitt's,Tumor, Burkitt,Tumor, Burkitt's
D003179	Complement C3b	The larger fragment generated from the cleavage of COMPLEMENT C3 by C3 CONVERTASE. It is a constituent of the ALTERNATIVE PATHWAY C3 CONVERTASE (C3bBb), and COMPLEMENT C5 CONVERTASES in both the classical (C4b2a3b) and the alternative (C3bBb3b) pathway. C3b participates in IMMUNE ADHERENCE REACTION and enhances PHAGOCYTOSIS. It can be inactivated (iC3b) or cleaved by various proteases to yield fragments such as COMPLEMENT C3C; COMPLEMENT C3D; C3e; C3f; and C3g.	C3b Complement,C3bi,Complement 3b,Complement Component 3b,Inactivated C3b,iC3b,C3b, Complement,C3b, Inactivated,Complement, C3b,Component 3b, Complement
D006801	Humans	Members of the species Homo sapiens.	Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D001402	B-Lymphocytes	Lymphoid cells concerned with humoral immunity. They are short-lived cells resembling bursa-derived lymphocytes of birds in their production of immunoglobulin upon appropriate stimulation.	B-Cells, Lymphocyte,B-Lymphocyte,Bursa-Dependent Lymphocytes,B Cells, Lymphocyte,B Lymphocyte,B Lymphocytes,B-Cell, Lymphocyte,Bursa Dependent Lymphocytes,Bursa-Dependent Lymphocyte,Lymphocyte B-Cell,Lymphocyte B-Cells,Lymphocyte, Bursa-Dependent,Lymphocytes, Bursa-Dependent
D017464	Receptors, Complement 3d	Molecular sites on or in B-lymphocytes, follicular dendritic cells, lymphoid cells, and epithelial cells that recognize and combine with COMPLEMENT C3D. Human complement receptor 2 (CR2) serves as a receptor for both C3dg and the gp350/220 glycoprotein of HERPESVIRUS 4, HUMAN, and binds the monoclonal antibody OKB7, which blocks binding of both ligands to the receptor.	Antigens, CD21,C3d Receptors,CD21 Antigens,CR2 Receptors,Complement 3d Receptors,Complement Receptors 2,Epstein-Barr Virus Receptors,Receptors, C3d,Receptors, CR2,CD 21 Antigens,CD21 Antigen,Complement 3d Receptor,Complement Receptor 2,Epstein-Barr Virus Receptor,Herpesvirus 4 Receptors, Human,Receptors, Epstein-Barr Virus,Antigen, CD21,Antigens, CD 21,Epstein Barr Virus Receptor,Epstein Barr Virus Receptors,Receptor 2, Complement,Receptor, Complement 3d,Receptor, Epstein-Barr Virus,Receptors 2, Complement,Receptors, Epstein Barr Virus,Virus Receptor, Epstein-Barr,Virus Receptors, Epstein-Barr