ErbB3/HER3 Active Protein | ErbB3 active protein

Human CellExp ErbB3 / HER3, human recombinant

Cat. Num. AAA845304

• Gene Names: ERBB3; HER3; LCCS2; ErbB-3; c-erbB3; erbB3-S; MDA-BF-1; c-erbB-3; p180-ErbB3; p45-sErbB3; p85-sErbB3
• Applications: SDS-Page
• Purity: >=95%
• Synonyms: ErbB3/HER3; Human CellExp ErbB3 / HER3; human recombinant; ERBB3; ErbB-3; HER3; HER-3; LCCS2; MDA-BF-1; MGC88033; c-erbB-3; c-erbB3; erbB3-S; p180-ErbB3; p45-sErbB3; p85-sErbB3; Receptor tyrosine-protein kinase erbB-3; ErbB3 active protein

• Host: HEK293 cells
• Purity/Purification: >=95%
• Form/Format: Lyophilized from 0.22 mum filtered solution in PBS, pH7.4. Generally 5-8% Mannitol or trehalose is added as a protectant before lyophilization.; Appearance: Lyophilized
• Sequence Length: 183

• Applicable Applications for ErbB3 active protein: SDS-PAGE
• Solubility/Reconstitution Instructions: Centrifuge the vial prior to opening. Reconstitute in sterile PBS, pH 7.4 to a concentration of 50 ug/ml. Do not vortex. This solution can be stored at 2-8 degree C for up to 1 month. For extended storage, it is recommended to store at -20 degree C.
• Endotoxin Level: <1 EU/mug by LAL method
• Biological Activity: Measured by its ability to inhibit the biological activity of Neuregulin1-beta1 on MCF-7 human breast cancer cells, in the presence of 10 ng/ml recombinant Human NRG1-beta1/HRG1-beta1 Extracellular Domain. The ED50 for this effect is typically 0.5-3.0 mug/ml
• Results: Measured by its ability to inhibit the biological activity of Neuregulin1-beta1 on MCF-7 human breast cancer cells, in the presence of 10 ng/ml recombinant Human NRG1-beta1/HRG1-beta1 Extracellular Domain. The ED50 for this effect is typically 0.5-3.0 mug/ml
• Handling: Centrifuge the vial prior to opening.
• Preparation and Storage: At -20 degree C; Shelf Life: 12 months

Testing Data

Related Product Information for ErbB3 active protein

Background: ErbB3, also known as Her3 (human epidermal growth factor receptor 3), is a member of the epidermal growth factor receptor (EGFR) family of receptor tyrosine kinases. This membrane-bound glycoprotein has a neuregulin binding domain but has not an active kinase domain. It therefore can bind the ligand but cannot mediate the intracellular signal transduction through protein phosphorylation. However, it does form heterodimers with ErbB2 or other EGFR members responsible for tyrosine phosphorylation to give a receptor complex and initiate the related pathway, which lead to cell proliferation or differentiation. Overexpression of this protein has been reported in numerous cancers, including prostate, bladder, and breast tumors. This protein has different isoforms derived from alternative splicing variants, and among which, the secreted isoform lacking the intermembrane region modulates the activity of membrane-bound form.

Product Categories/Family for ErbB3 active protein

Proteins and Enzymes; Human cell expressed recombinant proteinsCytokines; Growth Factors & Hormones; Human cell expressed recombinant proteinsCytokines; Growth Factors & Hormones; EGFsCytokines; Growth Factors & Hormones; Cytokines & Growth Factors (A-Z)

NCBI and Uniprot Product Information

• NCBI GI #: 54792102
• NCBI GeneID: 2065
• NCBI Accession #: NP_001005915.1
• NCBI GenBank Nucleotide #: NM_001005915.1
• UniProt Accession #: P21860; Q9BUD7; A8K6L6; B4DIK7; B4DV32; E9PDT8
• Molecular Weight: This protein is fused with a C-terminal 6×his tag and has a calculated MW of 71.5 kDa after removal of signal peptide. The predicted N-terminal is Ser 20. Protein migrates as 100-110 kDa in reduced SDS-PAGE resulting from glycosylation.
• NCBI Official Full Name: receptor tyrosine-protein kinase erbB-3 isoform s
• NCBI Official Synonym Full Names: erb-b2 receptor tyrosine kinase 3
• NCBI Official Symbol: ERBB3
• NCBI Official Synonym Symbols: HER3; LCCS2; ErbB-3; c-erbB3; erbB3-S; MDA-BF-1; c-erbB-3; p180-ErbB3; p45-sErbB3; p85-sErbB3
• NCBI Protein Information: receptor tyrosine-protein kinase erbB-3
• UniProt Protein Name: Receptor tyrosine-protein kinase erbB-3
• Protein Family: Receptor tyrosine-protein kinase
• UniProt Gene Name: ERBB3
• UniProt Synonym Gene Names: HER3
• UniProt Entry Name: ERBB3_HUMAN

NCBI Description

This gene encodes a member of the epidermal growth factor receptor (EGFR) family of receptor tyrosine kinases. This membrane-bound protein has a neuregulin binding domain but not an active kinase domain. It therefore can bind this ligand but not convey the signal into the cell through protein phosphorylation. However, it does form heterodimers with other EGF receptor family members which do have kinase activity. Heterodimerization leads to the activation of pathways which lead to cell proliferation or differentiation. Amplification of this gene and/or overexpression of its protein have been reported in numerous cancers, including prostate, bladder, and breast tumors. Alternate transcriptional splice variants encoding different isoforms have been characterized. One isoform lacks the intermembrane region and is secreted outside the cell. This form acts to modulate the activity of the membrane-bound form. Additional splice variants have also been reported, but they have not been thoroughly characterized. [provided by RefSeq, Jul 2008]

Uniprot Description

HER3: a receptor tyrosine kinase of the EGFR family. Binds and is activated by neuregulins and NTAK. Can form homodimers or ErbB-2/ErbB-3 heterodimers. Kinase domain lacks activity but heterodimerizes with other EGFRs to transduce growth signals. May be required for HER2 activity. Elevated expression in breast and other tumors is indicative of poor outcome. A secreted form is expressed in metastatic prostate cancer Two alternatively spliced isoforms have been described.

Protein type: Oncoprotein; Kinase, protein; Protein kinase, tyrosine (receptor); Membrane protein, integral; Protein kinase, TK; EC 2.7.10.1; TK group; EGFR family

Chromosomal Location of Human Ortholog: 12q13

Cellular Component: extracellular space; integral to plasma membrane; basolateral plasma membrane; apical plasma membrane; plasma membrane; lateral plasma membrane; receptor complex

Molecular Function: identical protein binding; protein binding; protein homodimerization activity; transmembrane receptor activity; protein heterodimerization activity; protein-tyrosine kinase activity; growth factor binding; protein tyrosine kinase activator activity; ATP binding

Biological Process: epidermal growth factor receptor signaling pathway; phosphoinositide 3-kinase cascade; fibroblast growth factor receptor signaling pathway; phosphoinositide-mediated signaling; nerve growth factor receptor signaling pathway; wound healing; heart development; cranial nerve development; negative regulation of cell adhesion; signal transduction; protein amino acid phosphorylation; negative regulation of signal transduction; peripheral nervous system development; regulation of cell proliferation; Schwann cell differentiation; positive regulation of phosphoinositide 3-kinase cascade; neuron apoptosis; innate immune response; negative regulation of secretion; negative regulation of neuron apoptosis; transmembrane receptor protein tyrosine kinase signaling pathway

Disease: Lethal Congenital Contracture Syndrome 2