CD74 recombinant protein

CD74, 73-232aa, Human, His tag, Baculovirus

Cat. Num. AAA205925

• Gene Names: CD74; II; DHLAG; HLADG; Ia-GAMMA
• Applications: SDS-Page
• Purity: > 85% by SDS-PAGE
• Synonyms: CD74; 73-232aa; Human; His tag; Baculovirus; HLA class II histocompatibility antigen gamma chain isoform b; DHLAG; HLADG; Ia-GAMMA II; CD74 recombinant protein

• Host: Baculovirus
• Purity/Purification: > 85% by SDS-PAGE
• Form/Format: Liquid. In phosphate buffered saline (pH 7.4) containing 10% glycerol.
• Concentration: 0.5 mg/ml (determined by Absorbance at 280nm) (varies by lot)
• Sequence: QQQGRLDKLT VTSQNLQLEN LRMKLPKPPK PVSKMRMATP LLMQALPMGA LPQGPMQNAT KYGNMTEDHV MHLLQNADPL KVYPPLKGSF PENLRHLKNT METIDWKVFE SWMHHWLLFE MSRHSLEQKP TDAPPKESLE LEDPSSGLGV TKQDLGPVPM HHHHHH
• Sequence Length: 232

• Applicable Applications for CD74 recombinant protein: SDS-PAGE
• Antigen Species: Human
• Tag Information: His-tag
• Endotoxin Level: < 1.0 EU per 1 microgram of protein (determined by LAL method)
• Preparation and Storage: Can be stored at 4 degree C short term (1-2 weeks).; For long term storage, aliquot and store at -20 degree C or -70 degree C.; Avoid repeated freezing and thawing cycles.

SDS-Page

Related Product Information for CD74 recombinant protein

CD74, also known as HLA class II histocompatibility antigen gamma chain or HLA-DR antigens-associated invariant chain or CD74 (Cluster of Differentiation 74). The nascent MHC class II protein in the rough ER has its peptide-binding cleft blocked by the invariant chain (Ii; a trimer) to prevent it from binding cellular peptides or peptides from the endogenous pathway. The invariant chain also facilitates MHC class II's export from the ER in a vesicle. The signal for endosomal targeting resides in the cytoplasmic tail of the invariant chain. This fuses with a lateendosome containing the endocytosed, degraded proteins. It is then cleaved by cathepsin S (cathepsin L in cortical thymic epithelial cells), leaving only a small fragment calle CLIP which blocks peptide binding until HLA-DM binds to MHC II, releasing CLIP and allowing other peptides to bind. The stable MHC class-II is then presented on the cell surface. Recombinant human CD74, fused to His-tag at C-terminus, was expressed in insect cell and purified by using conventional chromatography techniques.

Product Categories/Family for CD74 recombinant protein

Immunology

References

Claesson L. et al. (1983) Proc Natl Acad Sci U S A. 80 (24):7395-9.; Bakke O. et al. (1990) Cell. 63 (4):707-16.; Strubin M. et al. (1984) EMBO J. 3 (4):869-72.

NCBI and Uniprot Product Information

• NCBI GI #: 10835071
• NCBI GeneID: 972
• NCBI Accession #: NP_004346
• NCBI GenBank Nucleotide #: NM_004355.3
• UniProt Accession #: P04233; Q14597; Q29832; Q5U0J8; Q8SNA0; Q8WLP6; A8K7R1; B4DNE8; D3DQG3; D3DQG4
• Molecular Weight: 19.05kDa (166aa) 18-28kDa (SDS-PAGE under reducing conditions.)
• 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.