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P4HB / ERBA2L Antibody, Rabbit MAb

  • P4HB / ERBA2L Antibody, Rabbit MAb, Immunofluorescence
  • P4HB Antibody, Rabbit MAb, Immunoprecipitation
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Human P4HB Antibody Product Information
Immunogen:Recombinant Human P4HB protein (Catalog#10827-H08H)
Clone ID:16
Ig Type:Rabbit IgG
Concentration:
Endotoxin:
Formulation:0.2 μm filtered solution in PBS with 5% trehalose
Preparation:This antibody was obtained from a rabbit immunized with purified, recombinant Human P4HB / ERBA2L (rh P4HB; Catalog#10827-H08H; NP_000909.2; Met 1-Lys 505).
Human P4HB Antibody IF Application Image
P4HB / ERBA2L Antibody, Rabbit MAb, Immunofluorescence
[Click to enlarge image]
Caption:
Immunofluorescence staining of Human P4HB in Hela cells. Cells were fixed with 4% PFA, permeabilzed with 1% Triton X-100 in PBS, blocked with 10% serum, and incubated with Rabbit anti-Human P4HB monoclonal antibody (15 µg/ml) at 37℃ 1 hour. Then cells were stained with the Alexa Fluor®488-conjugated Goat Anti-rabbit IgG secondary antibody (green) and counterstained with DAPI (blue). Positive staining was localized to endoplasmic reticulum.
Human P4HB Antibody IP Application Image
Other P4HB Antibody Products
P4HB Related Area

P4HB Background

Protein disulfide-isomerase, also known as Cellular thyroid hormone-binding protein, Prolyl 4-hydroxylase subunit beta, p55 and P4HB, is a peripheral membrane protein which belongs to the protein disulfide isomerase family. P4HB is highly abundant. In some cell types, it seems to be also secreted or associated with the plasma membrane, where it undergoes constant shedding and replacement from intracellular sources. P4HB localizes near CD4-enriched regions on lymphoid cell surfaces. It is identified by mass spectrometry in melanosome fractions from stage I to stage IV. P4HB reduces and may activate fusogenic properties of HIV-1 gp120 surface protein, thereby enabling HIV-1 entry into the cell. P4HB catalyzes the formation, breakage and rearrangement of disulfide bonds. At the cell surface, it seems to act as a reductase that cleaves disulfide bonds of proteins attached to the cell. P4HB may therefore cause structural modifications of exofacial proteins. Inside the cell, it seems to form/rearrange disulfide bonds of nascent proteins. At high concentrations, P4HB functions as a chaperone that inhibits aggregation of misfolded proteins. At low concentrations, it facilitates aggregation (anti-chaperone activity). P4HB may be involved with other chaperones in the structural modification of the TG precursor in hormone biogenesis. It also acts a structural subunit of various enzymes such as prolyl 4-hydroxylase and microsomal triacylglycerol transfer protein MTTP.

Human P4HB References
  • Kivirikko KI, et al., 1989, FASEB J., 3 (5): 1609-17.
  • Pihlajaniemi T, et al.,1991, J Hepatol., 13, Suppl 3: S2
  • Fenouillet E., et al., 2001, J. Infect. Dis. 183:744-752.
  • Gevaert K., et al., 2003, Nat. Biotechnol. 21:566-569.
  • Barbouche R., et al., 2003, J. Biol. Chem. 278:3131-3136.
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