- Catalog number
- A02335-1
- Size / count
- 100 µg/Vial
- Dry ice
- No
- Hazardous
- No
- Discontinued
- No
- Background
- Protein disulfide-isomerase, also known as the beta-subunit of prolyl 4-hydroxylase (P4HB), is an enzyme that in humans encoded by the P4HB gene. This gene encodes the beta subunit of prolyl 4-hydroxylase, a highly abundant multifunctional enzyme that belongs to the protein disulfide isomerase family. When present as a tetramer consisting of two alpha and two beta subunits, this enzyme is involved in hydroxylation of prolyl residues in preprocollagen. This enzyme is also a disulfide isomerase containing two thioredoxin domains that catalyze the formation, breakage and rearrangement of disulfide bonds. Other known functions include its ability to act as a chaperone that inhibits aggregation of misfolded proteins in a concentration-dependent manner, its ability to bind thyroid hormone, its role in both the influx and efflux of S-nitrosothiol-bound nitric oxide, and its function as a subunit of the microsomal triglyceride transfer protein complex.
- Synonyms
- Acid-sensing ion channel 1; ASIC1; Amiloride-sensitive cation channel 2, neuronal; Brain sodium channel 2; BNaC2; ASIC1; ACCN2, BNAC2
- Gene Name
- P4HB
- Gene ID
- 5034
- UniProt
- P07237
- Host
- Rabbit
- Reactivity
- Human, Monkey, Mouse, Rat
- Cross Reactivity
- No cross-reactivity with other proteins.
- Immunogen
- E.coli-derived human P4HB recombinant protein (Position: A146-D363) .
- Clonality
- Polyclonal
- Tissue Specificity
- Expressed in most or all neurons.
- Applications
- ELISA, Flow Cytometry, IF, IHC, ICC, WB
- Field of Research
- Signal Transduction
- Purification
- Immunogen affinity purified.
- Concentration
- Adding 0.2 ml of distilled water will yield a concentration of 500 μg/ml.
- Form
- Lyophilized
- Reconstitution
- Add 0.2ml of distilled water will yield a concentration of 500ug/ml.
- Function
- Isoform 2 and isoform 3 function as proton-gated sodium channels; they are activated by a drop of the extracellular pH and then become rapidly desensitized. The channel generates a biphasic current with a fast inactivating and a slow sustained phase. Has high selectivity for sodium ions and can also transport lithium ions with high efficiency. Isoform 2 can also transport potassium, but with lower efficiency. It is nearly impermeable to the larger rubidium and cesium ions. Isoform 3 can also transport calcium ions. Mediates glutamate-independent Ca2+entry into neurons upon acidosis. This Ca2+overloading is toxic for cortical neurons and may be in part responsible for ischemic brain injury. Heteromeric channel assembly seems to modulate channel properties. Functions as a postsynaptic proton receptor that influences intracellular Ca2+concentration and calmodulin-dependent protein kinase II phosphorylation and thereby the density of dendritic spines. Modulates activity in the circuits underlying innate fear.
- References & Citations
- 1. Cheng, S. Y., Gong, Q. H., Parkinson, C., Robinson, E. A., Appella, E., Merlino, G. T., Pastan, I. The nucleotide sequence of a human cellular thyroid hormone-binding protein present in endoplasmic reticulum. J. Biol. Chem. 262: 11221-11227, 1987. 2. Koivu, J., Myllyla, R., Halaakoski, T., Pihlajaniemi, T., Tasanen, K., Kivirikko, K. I. A single polypeptide acts both as the beta subunit of prolyl 4-hydroxylase and as a protein disulfide-isomerase. J. Biol. Chem. 262: 6447-6449, 1987. 3. Mezghrani, A., Fassio, A., Benham, A., Simmen, T., Braakman, I., Sitia, R. Manipulation of oxidative protein folding and PDI redox state in mammalian cells. EMBO J. 20: 6288-6296, 2001.
- Storage Conditions
- Store at -20°C for one year from date of receipt. After reconstitution, at 4°C for one month. It can also be aliquotted and stored frozen at -20°C for six months. Avoid repeated freeze-thaw cycles.
- Observed Molecular Weight
- 57 kDa
- Applications Notes
- 6
- Gene Name Synonym
- Acid sensing ion channel subunit 1
- Isotype
- Rabbit IgG
- Contents
- Each vial contains 4mg Trehalose, 0.9mg NaCl, 0.2mg Na2HPO4.