Product Details

Purity

>97% as determined by SDS-PAGE.

Endotoxin

Less than 1.0 EU/μg as determined by LAL method.

Activity

Fully biologically active when compared to standard. The ED50 as determined by a cell proliferation assay using serum free human MCF-7 cells is less than 40 ng/ml, corresponding to a specific activity of >2.5x10⁴ IU/mg.

Target Names

NRG1

Uniprot No.

Q02297

Research Area

Neuroscience?

Alternative Names

Acetylcholine receptor-inducing activity; Acetylcholine receptor-inducing activity, chick, homolog of; ARIA; Breast cancer cell differentiation factor p45; GGF; GGF2; glial growth factor 2; Glial growth factor; Heregulin; heregulin, alpha (45kD, ERBB2 p185-activator); heregulin, alpha; HGL; HRG; HRG1; HRGA; MST131; MSTP131; NDF; Neu differentiation factor; Neuregulin-1; nrg1; NRG1-IT2; NRG1_HUMAN; Pro-NRG1; Sensory and motor neuron-derived factor; SMDF

Species

Homo sapiens (Human)

Source

E.coli

Expression Region

177-241aa

Complete Sequence

SHLVKCAEKE KTFCVNGGEC FMVKDLSNPS RYLCKCQPGF TGARCTENVP MKVQNQEKAE ELYQK

Mol. Weight

7.4 kDa

Protein Length

Partial

Tag Info

Tag-Free

Form

Lyophilized powder

Buffer

Lyophilized from a 0.2 m filtered 20 mM PB, pH 6.0, 150 mM NaCl

Reconstitution

We recommend that this vial be briefly centrifuged prior to opening to bring the contents to the bottom. Please reconstitute protein in deionized sterile water to a concentration of 0.1-1.0 mg/mL.We recommend to add 5-50% of glycerol (final concentration) and aliquot for long-term storage at -20°C/-80°C. Our default final concentration of glycerol is 50%. Customers could use it as reference.

Troubleshooting and FAQs

Protein FAQs

Storage Condition

Store at -20°C/-80°C upon receipt, aliquoting is necessary for mutiple use. Avoid repeated freeze-thaw cycles.

Shelf Life

The shelf life is related to many factors, storage state, buffer ingredients, storage temperature and the stability of the protein itself.
Generally, the shelf life of liquid form is 6 months at -20°C/-80°C. The shelf life of lyophilized form is 12 months at -20°C/-80°C.

Lead Time

5-10 business days

Notes

Repeated freezing and thawing is not recommended. Store working aliquots at 4°C for up to one week.

Datasheet & COA

Please contact us to get it.

Description

Neuregulin-1 signals through ErbB3/ErbB4 receptor tyrosine kinases to regulate neuronal survival, myelination, and synaptic plasticity, making it a critical tool in neuroscience research. This tag-free recombinant human NRG1 fragment (177–241 aa) encompasses the EGF-like domain responsible for receptor binding and demonstrates strong potency, with an ED50 below 40 ng/mL in serum-free MCF-7 proliferation assays, corresponding to a specific activity exceeding 2.5 × 10⁴ IU/mg. The E. coli expression system yields a compact protein free of mammalian glycosylation, providing a defined and consistent ligand well suited for receptor-ligand binding studies via SPR or ELISA, neuronal differentiation protocols, and cell proliferation or survival assays where glycan heterogeneity could confound results. Purity above 97% by SDS-PAGE combined with endotoxin levels below 1.0 EU/μg satisfies the criteria typical for sensitive cell-based experiments and supports use in primary neuronal culture systems.

Target Background

Function

Direct ligand for ERBB3 and ERBB4 tyrosine kinase receptors. Concomitantly recruits ERBB1 and ERBB2 coreceptors, resulting in ligand-stimulated tyrosine phosphorylation and activation of the ERBB receptors. The multiple isoforms perform diverse functions such as inducing growth and differentiation of epithelial, glial, neuronal, and skeletal muscle cells; inducing expression of acetylcholine receptor in synaptic vesicles during the formation of the neuromuscular junction; stimulating lobuloalveolar budding and milk production in the mammary gland and inducing differentiation of mammary tumor cells; stimulating Schwann cell proliferation; implication in the development of the myocardium such as trabeculation of the developing heart. Isoform 10 may play a role in motor and sensory neuron development. Binds to ERBB4. Binds to ERBB3. Acts as a ligand for integrins and binds (via EGF domain) to integrins ITGAV:ITGB3 or ITGA6:ITGB4. Its binding to integrins and subsequent ternary complex formation with integrins and ERRB3 are essential for NRG1-ERBB signaling. Induces the phosphorylation and activation of MAPK3/ERK1, MAPK1/ERK2 and AKT1. Ligand-dependent ERBB4 endocytosis is essential for the NRG1-mediated activation of these kinases in neurons.

Gene References into Functions

Enhanced ERBB4 phosphorylation could mediate NRG1 effects on mitochondrial function through signalling pathways PMID: 28496106
In Autism Spectrum Disorder patients, the NRG1 levels were found to be statistically significantly high compared to the healthy control group. PMID: 30150060
COMT-GG and NRG1-AA genotypes aid the transcranial direct current stimulation-induced improvement in auditory verbal hallucinations in schizophrenia patients. PMID: 29559020
The neuregulin1 was observed to be cleaved, adding to the 3 known NS3/4A cleavage targets. It showed that NS3/4A triggers an increase in neuregulin1 mRNA levels in HCV infected cells. PMID: 29438748
These results support the association between genetic variation of RET and NRG1 and susceptibility to Hirschsprung disease in the Chinese population. PMID: 28256518
Results found that NRG1, a potential prognostic marker is highly expressed in papillary thyroid cancer (PTC). Also, further data demonstrate that NRG1 activates the antioxidant pathway by upregulating the expression of antioxidant enzymes through NRF2, thus modulating redox homeostasis in PTC. PMID: 29901070
Mesenchymal stem cell-drived paclitaxel resistance in ErbB2/ErbB3-coexpressing breast cancer cells could be attributed to upregulation of Survivin via paracrine effect of NRG-1/ErbB3/PI-3K/Akt signaling, as either specific knockdown expression of ErbB3, or blocking of downstream PI-3K/Akt signaling, or specific inhibition of Survivin can completely reverse this effect. PMID: 29715459
The data suggest a role for transcriptional regulation of NRG1 in the predisposition to papillary thyroid carcinoma. PMID: 29121253
NRG1rs3924999 and NRG1 rs6994992 are associated with change of temperament scores in a clinical sample of subjects with major depression (MDD), who received selective serotonin reuptake inhibitor treatment. PMID: 29310728
NRG1 is a potential prognostic and therapeutic biomarker in gastric cancer patients PMID: 28573357
Study found that the protein levels of NRG1 and ErbB4 were significantly increased in the temporal cortex of patients with symptomatic epilepsy. Also, NRG1-ErbB4 signaling suppresses GluN2B phosphorylation by Src inhibition. GluN2B is closely related to synaptic activity and its regulation by the NRG1-ErbB4-Src signaling axis highlights the importance of NRG1-ErbB4 signaling in symptomatic epilepsy pathology. PMID: 28273943
Levels of NRG1 type III expression in peripheral blood mononuclear cells were positively correlated with impairments in social interaction in children with autism spectrum disorder. PMID: 28089559
NRG1-dependent activation of HER3 induces primary resistance to trastuzumab in HER2-overexpressing breast cancer cells. HER3 monoclonal antibody combined with trastuzumab may serve as a treatment choice for patients with primary resistance to trastuzumab. PMID: 29048656
Results represent the first comprehensive investigation of neuregulin-1 (NRG1) isoforms and protein expression in the blood of clozapine-treated schizophrenia patients and suggest levels of some NRG1 transcripts are upregulated in those with schizophrenia. PMID: 29225331
HRG/HER2/HER3 signaling promotes AhR-mediated Memo-1 expression and migration in colorectal cancer PMID: 27941874
Date indicate the subcellular localization and dynamics post-translational processing, (ectodomain shedding) of neuregulin1 (NRG1). PMID: 27364328
NRG1 and Gal-3 were significantly more elevated in cancer patients than in healthy controls. PMID: 28430337
The toxicity profile of lumretuzumab in combination with cetuximab and erlotinib was manageable, but only modest clinical activity was observed across tumor types. In the sqNSCLC cohort, there was no evidence of meaningful clinical benefit despite enriching for tumors with higher HRG mRNA expression levels. PMID: 28600476
Using time-resolved-fluorescence energy transfer (TR-FRET), we demonstrated that in the presence of recombinant NRG1, binding of 9F7-F11 (a nonligand-competing anti-HER3 antibody) to HER3 is increased, whereas that of ligand-competing anti-HER3 antibodies is decreased. PMID: 28507002
Data suggest that SLC3A2-NRG1 should be considered a therapeutic target for patients with invasive mucinous adenocarcinoma of the lung (IMA). PMID: 27626312
we show that ErbB3 interacts with the ESCRT-0 subunit Hrs both in the presence and absence of heregulin. This indicates an ESCRT-mediated sorting of ErbB3 to late endosomes and lysosomes, and in line with this we show that impaired ESCRT function leads to an endosomal accumulation of ErbB3. PMID: 28867611
NRG1 genotype is associated with substance use. PMID: 27353026
Significant genetic risk for Hirschsprung disease (HSCR) was imparted by rs2435357 and rs2506030 at RET and by rs12707682 at SEMA3 in a Chinese population. No evidence was found of a genetic association between HSCR and either of the NRG1 SNPs rs7835688 and rs16879552, at either allele or genotype level. PMID: 27203398
High HRG1 expression is associated with breast cancer. PMID: 26885614
Results showed that heregulin-1ss mRNA was downregulated in 82 % of patients with hepatocellular carcinoma. PMID: 27514687
NRG1/ErbB2/Src/PTK2 signaling pathway may be a novel regulator of keloid fibroblast migration. PMID: 27882385
The plasma soluble NRG1 level was significantly higher in mild and moderate Alzheimer's disease patients compared to controls. PMID: 27133777
Data indicate a role for AXL receptor tyrosine kinase (AXL) in regulating the nuclear translocation of epidermal growth factor receptor (EGFR) and suggest that AXL-mediated SRC family kinases (SFKs) and neuregulin-1 (NRG1) expression promote this process. PMID: 28049763
NRG1FISH detection should be considered in patients with IMA pan-negative for known driver oncogenes. These results might suggest that NRG1 fusion is more frequent in IMA from Asian patient. PMID: 27770508
Results suggest genetic variation at the 5' and 3' ends of NRG1 are associated with schizophrenia. [Meta-Analysis] PMID: 28094814
Nrg1 acts as an axonal signal that drives virtually all stages of Schwann cell development and myelination.Nrg1 plays important role in the peripheral nerve injury and nerve repair.[review] PMID: 26970613
We also demonstrate that the effects of RET and NRG1 are universal across European and Asian ancestries. In contrast, we detected a European-specific association of a low-frequency variant, rs80227144, in SEMA3. Conditional analyses on the lead SNPs revealed a secondary association signal, corresponding to an Asian-specific, low-frequency missense variant encoding RET p.Asp489Asn PMID: 27702942
primary aromatase inhibitor treatment modulates expression of HER-family members as well as EGFR1 and NRG1 in HER-2/neu non-amplified breast cancers in vivo PMID: 27343990
GGF2 may improve contractile performance in the failing rat heart and that infrequent exposure to GGF2 may improve LV function PMID: 27993643
these results suggest that changes in Nrg1 signaling may influence the pathological development of AD, and exogenous Nrg1 may serve as a potential candidate for the prevention and treatment of AD. PMID: 27486021
Orbitofrontal sulcogyral pattern formation in schizophrenia may be associated with NRG1 allele frequency, which is closely related to neurodevelopment. PMID: 26909665
This study found a significant association between genetic variation at NRG1 and the modulation of small-worldness properties of the functional cortical network during the performance of an odd-ball task in healthy subjects. PMID: 26650688
Neuregulin-1 has now been accepted to have therapeutic potential in cardiovascular disease. The preclinical and clinical researches of NRG1 have demonstrated its advantage effects in cardiac function with multi-target cardiovascular biology and pathophysiology, but its influence on cardiac electrophysiology is rarely involved, which is a very important aspect and should not be ignored. [review] PMID: 26902151
Results suggest that silibinin is a potential anti-cancer drug to inhibit proliferative and invasive characteristics of the epithelial ovarian cancer (EOC) cells that exhibit an autocrine heregulin (HRG)/HER3 protein (HRG/HER3) pathway. PMID: 26482609
This population-based case-control study was carried out to determine whether polymorphisms in DISC1 and NRG1 genes could be associated with schizophrenia in the Chinese population. PMID: 27236031
SZuggest the use of polymeric PLGA and PEG-PLGA microparticles as delivery systems for NRG1 in the treatment of myocardial infarction. PMID: 26546270
NRG1 was a shared common susceptibility gene for major mental disorders in Han Chinese population. PMID: 26888291
overexpression of phospho-ALK and alternative receptor tyrosine kinases such as phospho-EGFR, phospho-HER3, and phospho-IGFR-1R was observed in both resistant cell lines. Additionally, NRG1, a ligand for HER3, is upregulated and responsible for resistance by activating the EGFR family pathways through the NRG1-HER3-EGFR axis. PMID: 26992917
Study found significant association between NRG1 (rs35753505) gene polymorphism and the risk of temporal lobe epilepsy in a Chinese Han population PMID: 26071373
Study shows that Neuregulin did not perform successfully as a biomarker for acute myocardial infarction or acute coronary syndrome in the emergency department. PMID: 27110055
This study demonstrate dysregulation of the NRG1-ErbB4/3 axis in both human and mouse ALS and to provide support for NRG1 supplementation as a possible therapeutic option for motor neuron disease PMID: 26891847
Data show that isoform beta2 of the heregulin (HRGbeta2) localizes at telomeres with the telomere-associated proteins TRF2 and RAP1. PMID: 26318724
Data indicate telomere-binding protein RAP1 as an interacting partner of isoform beta2 of the heregulin (HRGbeta2). PMID: 26327598
findings newly identify a physiological function of the NRG1-ErbB2-ErbB3 axis in trophoblast survival during human placental development. PMID: 26490994
Neuregulin-activated ERBB4 induces the SREBP-2 cholesterol biosynthetic pathway and increases low-density lipoprotein uptake. PMID: 26535009

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Involvement in disease

A chromosomal aberration involving NRG1 produces gamma-heregulin. Translocation t(8;11) with TENM4. The translocation fuses the 5'-end of TENM4 to NRG1 (isoform 8). The product of this translocation was first thought to be an alternatively spliced isoform. Gamma-heregulin is a soluble activating ligand for the ERBB2-ERBB3 receptor complex and acts as an autocrine growth factor in a specific breast cancer cell line (MDA-MB-175). Not detected in breast carcinoma samples, including ductal, lobular, medullary, and mucinous histological types, neither in other breast cancer cell lines.

Subcellular Location

[Pro-neuregulin-1, membrane-bound isoform]: Cell membrane; Single-pass type I membrane protein. Note=Does not seem to be active.; [Neuregulin-1]: Secreted.; [Isoform 8]: Nucleus. Note=May be nuclear.; [Isoform 9]: Secreted. Note=Has a signal peptide.; [Isoform 10]: Membrane; Single-pass type I membrane protein. Note=May possess an internal uncleaved signal sequence.

Protein Families

Neuregulin family

Tissue Specificity

Type I isoforms are the predominant forms expressed in the endocardium. Isoform alpha is expressed in breast, ovary, testis, prostate, heart, skeletal muscle, lung, placenta liver, kidney, salivary gland, small intestine and brain, but not in uterus, stom

Database Links

HGNC: 7997

OMIM: 142445

KEGG: hsa:3084

STRING: 9606.ENSP00000349275

UniGene: Hs.453951

Code	CSB-AP002921HU
Abbreviation	Recombinant Human NRG1 protein, partial (Active)
MSDS	MSDS Datasheet
Size	$142
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Recombinant Human Pro-neuregulin-1, membrane-bound isoform protein (NRG1),Partial (Active)

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