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Key Specifications Table
| Species Reactivity | Key Applications | Host | Format | Antibody Type |
|---|---|---|---|---|
| H, M, R | WB | Rb | Culture Supernatant | Monoclonal Antibody |
| Description | |
|---|---|
| Catalogue Number | 04-775 |
| Replaces | 05-775 |
| Description | Anti-Ha-Ras Antibody, clone MC57, rabbit monoclonal |
| Alternate Names |
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| Background Information | Ras proteins are small GTP-binding proteins which, unlike the heterotrimeric G-proteins, contain all GTPase and effector functions within a single polypeptide. At least three isoforms of Ras exist, Ki-Ras, Ha-Ras and N-Ras, with distinct expression patterns but similar signaling activity. Ras is palmitoylated and farnesylated at the carboxy terminus, anchoring it in the membrane. In resting cells, Ras is loaded with GDP, and is activated subsequent to growth factor stimulation of receptors, which recruit Ras Guanine nucleotide Exchange Factors to the plane of the membrane. Proximity of exchange factors to the Ras proteins causes release of GDP, and its replacement by GTP. In its GTP-bound form, Ras binds several proteins, including Raf, RalGDS and PI3 Kinase. Inactivation of Ras occurs by GTP hydrolysis, which is greatly accelerated by RasGAP or NF-1, two known Ras GTPase Activating Proteins. It is possible to assay for Ras activation by incubation of lysates with the Ras-binding domain of Raf-1, which selectively binds to Ras:GTP. |
| Product Information | |
|---|---|
| Format | Culture Supernatant |
| Control |
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| Presentation | Cultured supernantant containing 0.05% sodium azide. |
| Quality Level | MQ100 |
| Applications | |
|---|---|
| Application | Detect Ha-Ras using this Anti-Ha-Ras Antibody, clone MC57 validated for use in WB. |
| Key Applications |
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| Biological Information | |
|---|---|
| Immunogen | GST fusion protein corresponding to full length human Ha-Ras. Clone MC57. |
| Clone | MC57 |
| Concentration | Please refer to the Certificate of Analysis for the lot-specific concentration. |
| Host | Rabbit |
| Specificity | Recognizes Ha-Ras, Mr ~21 kDa. Does not cross react with Cdc42, Rho or Rac1. |
| Isotype | IgG |
| Species Reactivity |
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| Species Reactivity Note | Human. Predicted to cross-react with mouse and rat based on sequence homology. |
| Antibody Type | Monoclonal Antibody |
| Entrez Gene Number |
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| Entrez Gene Summary | This gene belongs to the Ras oncogene family, whose members are related to the transforming genes of mammalian sarcoma retroviruses. The products encoded by these genes function in signal transduction pathways. These proteins can bind GTP and GDP, and they have intrinsic GTPase activity. This protein undergoes a continuous cycle of de- and re-palmitoylation, which regulates its rapid exchange between the plasma membrane and the Golgi apparatus.Mutations in this gene cause Costello syndrome, a disease characterized by increased growth at the prenatal stage, growth deficiency at the postnatal stage, predisposition to tumor formation, mental retardation, skin and musculoskeletal abnormalities, distinctive facial appearance and cardiovascular abnormalities. Defects in this gene are implicated in a variety of cancers, including bladder cancer, follicular thyroid cancer, and oral squamous cell carcinoma. Multiple transcript variants, which encode different isoforms, have been identified for this gene. |
| Gene Symbol |
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| UniProt Number |
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| UniProt Summary | FUNCTION: Ras proteins bind GDP/GTP and possess intrinsic GTPase activity. Ref.18 Ref.32 ENZYME REGULATION: Alternate between an inactive form bound to GDP and an active form bound to GTP. Activated by a guanine nucleotide-exchange factor (GEF) and inactivated by a GTPase-activating protein (GAP). SUBUNIT STRUCTURE: In its GTP-bound form interacts with PLCE1. Interacts with TBC1D10C. Interacts with RGL3 By similarity. Forms a signaling complex with RASGRP1 and DGKZ. Interacts with RASSF5. SUBCELLULAR LOCATION: Cell membrane; Lipid-anchor; Cytoplasmic side. Golgi apparatus membrane; Lipid-anchor. Note: Shuttles between the plasma membrane and the Golgi apparatus. PTM: Palmitoylated by the ZDHHC9-GOLGA7 complex. A continuous cycle of de- and re-palmitoylation regulates rapid exchange between plasma membrane and Golgi. S-nitrosylated; critical for redox regulation. Important for stimulating guanine nucleotide exchange. No structural perturbation on nitrosylation. INVOLVEMENT IN DISEASE:Defects in HRAS are the cause of Costello syndrome [MIM:218040]; also known as faciocutaneoskeletal syndrome. Costello syndrome is a rare condition characterized by prenatally increased growth, postnatal growth deficiency, mental retardation, distinctive facial appearance, cardiovascular abnormalities (typically pulmonic stenosis, hypertrophic cardiomyopathy and/or atrial tachycardia), tumor predisposition, skin and musculoskeletal abnormalities. Defects in HRAS are the cause of congenital myopathy with excess of muscle spindles (CMEMS) [MIM:218040]. CMEMS is a variant of Costello syndrome. Defects in HRAS may be a cause of susceptibility to Hurthle cell thyroid carcinoma [MIM:607464]; also known as Hurthle cell thyroid neoplasia. Hurthle cell thyroid carcinoma accounts for approximately 3% of all thyroid cancers. Although they are classified as variants of follicular neoplasms, they are more often multifocal and somewhat more aggressive and are less likely to take up iodine than are other follicular neoplasms. Mutations which change positions 12, 13 or 61 activate the potential of HRAS to transform cultured cells and are implicated in a variety of human tumors. Defects in HRAS are a cause of bladder cancer. Defects in HRAS are the cause of oral squamous cell carcinoma (OSCC). SEQUENCE SIMILARITIES: Belongs to the small GTPase superfamily. Ras family. MASS SPECTROMETRY: Molecular mass is 6.223±2 Da from positions 112 - 166. Determined by ESI. Molecular mass is 6.253±2 Da from positions 112 - 166. Determined by ESI. Includes one nitric oxide molecule. |
| Molecular Weight | ~21 kDa |
| Product Usage Statements | |
|---|---|
| Quality Assurance | Western Blot Analysis: A 1:1000 dilution of this antibody detected Ha-Ras in RIPA lysates from A431 cells. |
| Usage Statement |
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| Storage and Shipping Information | |
|---|---|
| Storage Conditions | Stable for 1 year at -20ºC from date of receipt. Handling Recommendations: Upon receipt, and prior to removing the cap, centrifuge the vial and gently mix the solution. Aliquot into microcentrifuge tubes and store at -20°C. Avoid repeated freeze/thaw cycles, which may damage IgG and affect product performance. |
| Packaging Information | |
|---|---|
| Material Size | 100 µL |