Reactome: A Curated Pathway Database
Results 1 to 10 of 86
Pathways (13) Reactions (34) Proteins (1) Others (38)
Protein: UniProt:P01920 HLA-DQB1 (Homo sapiens)
Last changed: 2014-11-25 20:54:06

Pathway: Immune System (Homo sapiens)
Humans are exposed to millions of potential pathogens daily, through contact, ingestion, and inhalation. Our ability to avoid infection depends on the adaptive immune system and during the first critical hours and days of exposure to a new pathogen, our innate immune system
Last changed: 2014-11-21 19:49:01

Pathway: MHC class II antigen presentation (Homo sapiens)
Antigen presenting cells (APCs) such as B cells, dendritic cells (DCs) and monocytes/macrophages express major histocompatibility complex class II molecules (MHC II) at their surface and present exogenous antigenic peptides to CD4+ T helper cells. CD4+ T cells play a central role in immune protection. On their activation they stimulate differentiation of B cells into antibody-producing B-cell blasts an
Last changed: 2014-11-21 19:49:01

Pathway: Cytokine Signaling in Immune system (Homo sapiens)
Cytokines are small proteins that regulate and mediate immunity, inflammation, and hematopoiesis. They are secreted in response to immune stimuli, and usually act briefly, locally, at very low concentrations. Cytokines bind to specific membrane receptors, which then signal the cell via second messengers, to regulate cellular activity
Last changed: 2014-11-21 19:49:01

Pathway: Interferon gamma signaling (Homo sapiens)
Interferon-gamma (IFN-gamma) belongs to the type II interferon family and is secreted by activated immune cells-primarily T and NK cells, but also B-cells and APC. INFG exerts its effect on cells by interacting with the specific IFN-gamma receptor (IFNGR). IFNGR consists of two chains, namely IFNGR1 (also known as the IFNGR alpha chain) and IFNGR2 (also known as the IFNGR beta chain). IFNGR1 is the lig
Last changed: 2014-11-21 06:36:34

Pathway: Interferon Signaling (Homo sapiens)
Interferons (IFNs) are cytokines that play a central role in initiating immune responses, especially antiviral and antitumor effects. There are three types of IFNs:Type I (IFN-alpha, -beta and others, such as omega, epsilon, and kappa), Type II (IFN-gamma) and Type III (IFN-lamda). In this module we are mainly focusing on type I IFNs alpha and beta and type II IFN-gamma. Both type I and type II IFNs ex
Last changed: 2014-11-21 19:49:01

Pathway: Costimulation by the CD28 family (Homo sapiens)
Optimal activation of T-lymphocytes requires at least two signals. A primary one is delivered by the T-cell receptor (TCR) complex after antigen recognition and additional costimulatory signals are delivered by the engagement of costimulatory receptors such as CD28. The best-characterized costimulatory pathways are mediated by a set of cosignaling molecules belonging to the CD28 superfamily, including
Last changed: 2014-11-21 19:49:01

Pathway: Adaptive Immune System (Homo sapiens)
Adaptive immunity refers to antigen-specific immune response efficiently involved in clearing the pathogens. The adaptive immune system is comprised of B and T lymphocytes that express receptors with remarkable diversity tailored to recognize aspects of particular pathogens or antigens. During infection, dendritic cells (DC) which act as sentinels in the peripheral tissues recognize and pick up the pat
Last changed: 2014-11-21 19:49:01

Pathway: TCR signaling (Homo sapiens)
The TCR is a multisubunit complex that consists of clonotypic alpha/beta chains noncovalently associated with the invariant CD3 delta/epsilon/gamma and TCR zeta chains. T cell activation by antigen presenting cells (APCs) results in the activation of protein tyrosine kinases (PTKs) that associate with CD3 and TCR zeta subunits and the co-receptor CD4. Members of the Src kinases (Lck), Syk kinases (ZAP-
Last changed: 2014-11-21 19:49:01

Pathway: Downstream TCR signaling (Homo sapiens)
Changes in gene expression are required for the T cell to gain full proliferative competence and to produce effector cytokines. Three transcription factors in particular have been found to play a key role in TCR-stimulated changes in gene expression, namely NF-kB, NFAT and AP-1. A key step in NF-kB activation is the stimulation and translocation of PKC theta. The critical element that effects PKC th
Last changed: 2014-11-21 19:49:01

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