| Host: |
Rabbit |
| Applications: |
WB |
| Reactivity: |
Human/Rat |
| Note: |
STRICTLY FOR FURTHER SCIENTIFIC RESEARCH USE ONLY (RUO). MUST NOT TO BE USED IN DIAGNOSTIC OR THERAPEUTIC APPLICATIONS. |
| Short Description: |
Rabbit polyclonal antibody anti-INSIG1 (C-Term) is suitable for use in Western Blot research applications. |
| Clonality: |
Polyclonal |
| Conjugation: |
Unconjugated |
| Isotype: |
IgG |
| Formulation: |
PBS with 0.01% Thimerosal, 50% Glycerol, pH7.3. |
| Purification: |
Affinity purification |
| Dilution Range: |
WB 1:500-1:2000 |
| Storage Instruction: |
Store at-20°C for up to 1 year from the date of receipt, and avoid repeat freeze-thaw cycles. |
| Gene Symbol: |
INSIG1 |
| Gene ID: |
3638 |
| Uniprot ID: |
INSI1_HUMAN |
| Immunogen Region: |
C-Term |
| Immunogen: |
A synthetic peptide corresponding to a sequence within amino acids 200 to the C-terminus of human INSIG1 (NP_005533.2). |
| Immunogen Sequence: |
LWWTFDRSRSGLGLGITIAF LATLITQFLVYNGVYQYTSP DFLYIRSWLPCIFFSGGVTV GNIGRQLAMGVPEKPHSD |
| Tissue Specificity | Expressed in all tissues tested with highest expression in the liver. |
| Post Translational Modifications | Phosphorylation at Ser-207 by PCK1 reduces binding to oxysterol, disrupting the interaction between INSIG1 and SCAP, thereby promoting nuclear translocation of SREBP proteins (SREBF1/SREBP1 or SREBF2/SREBP2) and subsequent transcription of downstream lipogenesis-related genes. Ubiquitinated by AMFR/gp78 in response to sterol deprivation, leading to its degradation: when the SCAP-SREBP complex becomes dissociated from INSIG1, INSIG1 is then ubiquitinated and degraded in proteasomes. Although ubiquitination is required for rapid INSIG1 degradation, it is not required for release of the SCAP-SREBP complex. Ubiquitinated by RNF139. |
| Function | Oxysterol-binding protein that mediates feedback control of cholesterol synthesis by controlling both endoplasmic reticulum to Golgi transport of SCAP and degradation of HMGCR. Acts as a negative regulator of cholesterol biosynthesis by mediating the retention of the SCAP-SREBP complex in the endoplasmic reticulum, thereby blocking the processing of sterol regulatory element-binding proteins (SREBPs) SREBF1/SREBP1 and SREBF2/SREBP2. Binds oxysterol, including 25-hydroxycholesterol, regulating interaction with SCAP and retention of the SCAP-SREBP complex in the endoplasmic reticulum. In presence of oxysterol, interacts with SCAP, retaining the SCAP-SREBP complex in the endoplasmic reticulum, thereby preventing SCAP from escorting SREBF1/SREBP1 and SREBF2/SREBP2 to the Golgi. Sterol deprivation or phosphorylation by PCK1 reduce oxysterol-binding, disrupting the interaction between INSIG1 and SCAP, thereby promoting Golgi transport of the SCAP-SREBP complex, followed by processing and nuclear translocation of SREBF1/SREBP1 and SREBF2/SREBP2. Also regulates cholesterol synthesis by regulating degradation of HMGCR: initiates the sterol-mediated ubiquitin-mediated endoplasmic reticulum-associated degradation (ERAD) of HMGCR via recruitment of the reductase to the ubiquitin ligases AMFR/gp78 and/or RNF139. Also regulates degradation of SOAT2/ACAT2 when the lipid levels are low: initiates the ubiquitin-mediated degradation of SOAT2/ACAT2 via recruitment of the ubiquitin ligases AMFR/gp78. |
| Protein Name | Insulin-Induced Gene 1 ProteinInsig-1 |
| Database Links | Reactome: R-HSA-1655829 |
| Cellular Localisation | Endoplasmic Reticulum MembraneMulti-Pass Membrane Protein |
| Alternative Antibody Names | Anti-Insulin-Induced Gene 1 Protein antibodyAnti-Insig-1 antibodyAnti-INSIG1 antibody |
Information sourced from Uniprot.org
12 months for antibodies. 6 months for ELISA Kits. Please see website T&Cs for further guidance
