Rabbit HLA-DRB5 Polyclonal Antibody | anti-HLA-DRB5 antibody

HLA-DRB5 Rabbit Polyclonal

Cat. Num. AAA7600142

• Gene Names: HLA-DRB5; HLA-DRB
• Reactivity: Human, Mouse, Rat
• Applications: ELISA, Western Blot, Immunohistochemistry
• Purity: >=95% as determined by SDS-PAGE; Immunogen Affinity Purified
• Synonyms: HLA-DRB5; Polyclonal Antibody; HLA-DRB5 Rabbit Polyclonal; anti-HLA-DRB5 antibody

• Host: Rabbit
• Reactivity: Human, Mouse, Rat
• Clonality: Polyclonal
• Isotype: IgG
• Purity/Purification: >=95% as determined by SDS-PAGE; Immunogen Affinity Purified
• Form/Format: Liquid
• Sequence Length: 226

• Applicable Applications for anti-HLA-DRB5 antibody: ELISA (EIA), Western Blot (WB), Immunohistochemistry (IHC)
• Immunogen: Major histocompatibility complex, class II, DR beta 5
• Preparation and Storage: PBS with 0.02% sodium azide and 50% glycerol pH 7.3, -20 degree C for 24 months (Avoid repeated freeze / thaw cycles.)

Immunohistochemistry (IHC)

(Immunohistochemistry of paraffin-embedded human tonsillitis using MBS7600142 (HLA-DRB5 antibody) at dilution of 1:50)

Western Blot (WB)

(HepG2 cells were subjected to SDS PAGE followed by western blot with MBS7600142 (HLA-DRB5 antibody) at dilution of 1:500)

NCBI and Uniprot Product Information

• NCBI GI #: 619534085
• NCBI GeneID: 3127
• Molecular Weight: 29,826 Da
• NCBI Official Full Name: HLA-DRB5, partial
• NCBI Official Synonym Full Names: major histocompatibility complex, class II, DR beta 5
• NCBI Official Symbol: HLA-DRB5
• NCBI Official Synonym Symbols: HLA-DRB
• NCBI Protein Information: major histocompatibility complex, class II, DR beta 5
• UniProt Protein Name: HLA class II histocompatibility antigen, DRB1-9 beta chain
• Protein Family: HLA class II histocompatibility antigen
• UniProt Gene Name: HLA-DRB1
• UniProt Synonym Gene Names: DR-9; DR9
• UniProt Entry Name: 2B19_HUMAN

NCBI Description

HLA-DRB5 belongs to the HLA class II beta chain paralogues. This class II molecule is a heterodimer consisting of an alpha (DRA) and a beta (DRB) chain, both anchored in the membrane. It plays a central role in the immune system by presenting peptides derived from extracellular proteins. Class II molecules are expressed in antigen presenting cells (APC: B lymphocytes, dendritic cells, macrophages). The beta chain is approximately 26-28 kDa and its gene contains 6 exons. Exon one encodes the leader peptide, exons 2 and 3 encode the two extracellular domains, exon 4 encodes the transmembrane domain and exon 5 encodes the cytoplasmic tail. Within the DR molecule the beta chain contains all the polymorphisms specifying the peptide binding specificities. Typing for these polymorphisms is routinely done for bone marrow and kidney transplantation. DRB1 is expressed at a level five times higher than its paralogues DRB3, DRB4 and DRB5. The presence of DRB5 is linked with allelic variants of DRB1, otherwise it is omitted. There are 4 related pseudogenes: DRB2, DRB6, DRB7, DRB8 and DRB9. [provided by RefSeq, Jul 2008]

Uniprot Description

HLA-DRB5: Binds peptides derived from antigens that access the endocytic route of antigen presenting cells (APC) and presents them on the cell surface for recognition by the CD4 T-cells. The peptide binding cleft accommodates peptides of 10-30 residues. The peptides presented by MHC class II molecules are generated mostly by degradation of proteins that access the endocytic route; where they are processed by lysosomal proteases and other hydrolases. Exogenous antigens that have been endocytosed by the APC are thus readily available for presentation via MHC II molecules; and for this reason this antigen presentation pathway is usually referred to as exogenous. As membrane proteins on their way to degradation in lysosomes as part of their normal turn-over are also contained in the endosomal/lysosomal compartments; exogenous antigens must compete with those derived from endogenous components. Autophagy is also a source of endogenous peptides; autophagosomes constitutively fuse with MHC class II loading compartments. In addition to APCs; other cells of the gastrointestinal tract; such as epithelial cells; express MHC class II molecules and CD74 and act as APCs; which is an unusual trait of the GI tract. To produce a MHC class II molecule that presents an antigen; three MHC class II molecules (heterodimers of an alpha and a beta chain) associate with a CD74 trimer in the ER to form a heterononamer. Soon after the entry of this complex into the endosomal/lysosomal system where antigen processing occurs; CD74 undergoes a sequential degradation by various proteases; including CTSS and CTSL; leaving a small fragment termed CLIP (class-II-associated invariant chain peptide). The removal of CLIP is facilitated by HLA-DM via direct binding to the alpha-beta-CLIP complex so that CLIP is released. HLA-DM stabilizes MHC class II molecules until primary high affinity antigenic peptides are bound. The MHC II molecule bound to a peptide is then transported to the cell membrane surface. In B-cells; the interaction between HLA-DM and MHC class II molecules is regulated by HLA-DO. Primary dendritic cells (DCs) also to express HLA-DO. Lysosomal miroenvironment has been implicated in the regulation of antigen loading into MHC II molecules; increased acidification produces increased proteolysis and efficient peptide loading. Belongs to the MHC class II family.

Protein type: Membrane protein, integral

Chromosomal Location of Human Ortholog: 6p21.3

Cellular Component: external side of plasma membrane; extracellular space; Golgi membrane; late endosome membrane; lysosomal membrane; membrane; MHC class II protein complex; plasma membrane; trans-Golgi network membrane

Molecular Function: peptide antigen binding

Biological Process: antigen processing and presentation of exogenous peptide antigen via MHC class II; detection of bacterium; humoral immune response mediated by circulating immunoglobulin; immune response; immunoglobulin production during immune response; inflammatory response to antigenic stimulus; negative regulation of interferon-gamma production; negative regulation of T cell proliferation; protein tetramerization; regulation of interleukin-4 production; T cell costimulation; T cell receptor signaling pathway; T-helper 1 type immune response