CD74 recombinant protein

Recombinant Human CD74 Protein (His tag)

Cat. Num. AAA2545920

• Gene Names: CD74; II; DHLAG; HLADG; Ia-GAMMA
• Purity: > 80 % as determined by SDS-PAGE
• Synonyms: CD74; Recombinant Human CD74 Protein (His tag); DHLAG; HLADG; Ia-GAMMA; CD74 recombinant protein

• Host: Human Cells
• Purity/Purification: > 80 % as determined by SDS-PAGE
• Form/Format: Lyophilized from sterile PBS, pH 7.4
• Sequence Length: 232

• Application Notes: The recombinant human CD74 consists of 176 amino acids and has a calculated molecular mass of 20.4 kDa. In SDS-PAGE under reducing conditions, the apparent molecular mass of rhCD74 is approximately 34 kDa due to glycosylation.
• Predicted N Terminal: Val 19
• Endotoxin: < 1.0 EU per mug of the protein as determined by the LAL method
• Preparation and Storage: Samples are stable for up to twelve months from date of receipt at -70 degree C

SDS-PAGE

Related Product Information for CD74 recombinant protein

Background: The cluster of differentiation (CD) system is commonly used as cell markers in immunophynotyping. Different kinds of cells in the immune system can be identified through the surface CD molecules which associating with the immune function of the cell. There are more than 320 CD unique clusters and subclusters have been identified. Some of the CD molecules serve as receptors or ligands important to the cell through initiating a signal cascade which then alter the behavior of the cell. Some CD proteins do not take part in cell signal process but have other functions such as cell adhesion. CD74, also known as HLA class2 histocompatibility antigen gamma chain and HLA-DR antigens-associated invariant chain, is a polypeptide involved in the formation and transport of MHC class2 protein. CD74 is expressed by B cells, macrophages, and Reed-Sternberg cells. When MHC class 2 protein was in the rough ER, its peptide-binding cleft was blocked by CD74 to prevent it from interacting with the endogenous peptides. CD74 also serves to facilitate MHC class2's export from ER.

Description: A DNA sequence encoding the extracellular domain (Gln 73-Met 232) of human CD74 isoform b (NP_004346.1) was fused with a polyhistidine tag at the N-terminus.

NCBI and Uniprot Product Information

• NCBI GI #: 10835071
• NCBI GeneID: 972
• NCBI Accession #: NP_004346.1
• NCBI GenBank Nucleotide #: NM_004355.3
• UniProt Accession #: P04233; Q14597; Q29832; Q5U0J8; Q8SNA0; Q8WLP6; A8K7R1; B4DNE8; D3DQG3; D3DQG4
• Molecular Weight: 18,328 Da
• NCBI Official Full Name: HLA class II histocompatibility antigen gamma chain isoform b
• NCBI Official Synonym Full Names: CD74 molecule
• NCBI Official Symbol: CD74
• NCBI Official Synonym Symbols: II; DHLAG; HLADG; Ia-GAMMA
• NCBI Protein Information: HLA class II histocompatibility antigen gamma chain
• UniProt Protein Name: HLA class II histocompatibility antigen gamma chain
• Protein Family: H-2 class II histocompatibility antigen
• UniProt Gene Name: CD74
• UniProt Synonym Gene Names: DHLAG; Ii

NCBI Description

The protein encoded by this gene associates with class II major histocompatibility complex (MHC) and is an important chaperone that regulates antigen presentation for immune response. It also serves as cell surface receptor for the cytokine macrophage migration inhibitory factor (MIF) which, when bound to the encoded protein, initiates survival pathways and cell proliferation. This protein also interacts with amyloid precursor protein (APP) and suppresses the production of amyloid beta (Abeta). Multiple alternatively spliced transcript variants encoding different isoforms have been identified. [provided by RefSeq, Aug 2011]

Uniprot Description

Plays a critical role in MHC class II antigen processing by stabilizing peptide-free class II alpha/beta heterodimers in a complex soon after their synthesis and directing transport of the complex from the endoplasmic reticulum to the endosomal/lysosomal system where the antigen processing and binding of antigenic peptides to MHC class II takes place. Serves as cell surface receptor for the cytokine MIF.