- Catalog number
- PA1857-Dylight550
- Size / count
- 100 µg
- Dry ice
- No
- Hazardous
- No
- Discontinued
- Yes
- Background
- ORAI1 (ORAI calcium release-activated calcium modulator 1), also known as CRACM1, TMEM142A, Calcium release-activated calcium channel protein 1, Protein orai-1, Transmembrane protein 142A, FLJ14466, is a calcium selective ion channel that in humans is encoded by the ORAI1 gene. Orai1 channels play an important role in the activation of T-lymphocytes. The loss of function mutation of Orai1 causes severe combined immunodeficiency (SCID) in humans. The mammalian orai family has two additional homologs, orai2 and orai3. Orai proteins share no homology with any other ion channel family of any other known proteins. They have 4 transmembrane domains and form tetramers. Prakriya et al. (2006) showed that ORAI1 is a PM protein, and that CRAC channel function is sensitive to mutation of 2 conserved acidic residues in the transmembrane segments. Glu106-to-asp (E106D) and glu190-to-gln (E190Q) substitutions in transmembrane helices 1 and 3, respectively, diminished calcium ion influx, increased current carried by monovalent cations, and rendered the channel permeable to cesium ion. Prakriya et al. (2006) showed that ORAI1 is a PM protein, and that CRAC channel function is sensitive to mutation of 2 conserved acidic residues in the transmembrane segments.
- Synonyms
- Calcium release-activated calcium channel protein 1;Protein orai-1;Transmembrane protein 142A;ORAI1;CRACM1, TMEM142A;
- Gene Name
- Calcium release-activated calcium channel protein 1
- UniProt
- Q96D31
- Host
- Rabbit
- Reactivity
- Human,Mouse,Rat
- Cross Reactivity
- No cross-reactivity with other proteins
- Immunogen
- A synthetic peptide corresponding to a sequence at the C-terminus of human Orai1, different from the related rat and mouse sequences by two amino acids.
- Clonality
- Polyclonal
- Tissue Specificity
- Bone marrow, testis and kidney. Isoform 4 is detected in all bladder tumor and prostate tumor cells. .
- Applications
- WB
- 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
- Ca (2+) release-activated Ca (2+) (CRAC) channel subunit which mediates Ca (2+) influx following depletion of intracellular Ca (2+) stores and channel activation by the Ca (2+) sensor, STIM1. CRAC channels are the main pathway for Ca (2+) influx in T-cells and promote the immune response to pathogens by activating the transcription factor NFAT. .
- Components
- Each vial contains 4 mg Trehalose, 0.9 mg NaCl and 0.2mg Na2HPO4.
- References & Citations
- 1. Prakriya, M., Feske, S., Gwack, Y., Srikanth, S., Rao, A., Hogan, P. G. Orai1 is an essential pore subunit of the CRAC channel. Nature 443: 230-233, 2006.
- Storage Conditions
- Store at -20℃ for one year from date of receipt. After reconstitution, at 4℃ for one month. It can also be aliquotted and stored frozen at -20℃ for six months. Avoid repeated freeze-thaw cycles.
- Calculated Molecular Weight
- 32668 MW
- Observed Molecular Weight
- 50 kDa
- Fragment
- Rabbit IgG
- Specificity
- No cross reactivity with other proteins.
- Applications Notes
- Western blot, 0.1-0.5μg/ml, Human, Mouse, Rat<br>
- Subcellular Location
- Cell membrane ; Multi-pass membrane protein . Cytoplasmic vesicle, autophagosome . Isoform beta is more mobile in the plasma membrane. Colocalizes with UBQLN1 in the autophagosome. .
- Sequence Similarities
- Belongs to the Orai family.
- Protein Name
- Calcium release-activated calcium channel protein 1