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  • G8046 - Anti-phospho-G3BP (pSer149) antibody produced in rabbit

G8046 Sigma-Aldrich

Anti-phospho-G3BP (pSer149) antibody produced in rabbit

~1.0 mg/mL, affinity isolated antibody, buffered aqueous solution

Synonym: Anti-RAS-GTPase-activating protein SH3-domain binding protein 1, Anti-G3BP1, Anti-GAP SH3 domain-binding protein, Anti-HDH-VIII, Anti-human DNA helicase VIII



Related Categories Alphabetical Index, Antibodies, Antibodies for Cell Biology, Antibodies for Cell Stress, Antibodies for Epigenetics and Nuclear Signaling,
conjugate   unconjugated
clone   polyclonal
biological source   rabbit
application(s)   western blot: 5-10 μg/mL using whole extract of human K562 and HeLa cells
species reactivity   mouse (predicted), rat (predicted), human
mol wt   antigen ~68 kDa
form   buffered aqueous solution
shipped in   dry ice
storage temp.   −20°C
antibody form   affinity isolated antibody
Quality Level   200
antibody product type   primary antibodies
concentration   ~1.0 mg/mL
UniProt accession no.   Q13283
Gene Information   human ... G3BP1(10146)
mouse ... G3bp1(27041)
rat ... G3bp1(171092)


General description

G3BP (Ras-GTPase-activating protein SH3 domain binding protein 1) is a 68kDa, single-strand-specific endoribonuclease that is phosphorylation-dependent.


Anti-phospho-G3BP (pSer149) antibody produced in rabbit is suitable for western blotting at a working concentration of 5-10μg/mL using whole extract of human K562 and HeLa cells.

Target description

G3BP (pSer149) encodes one of the DNA-unwinding enzymes which prefers partially unwound 3′-tailed substrates and can also unwind partial RNA/DNA and RNA/RNA duplexes in an ATP-dependent fashion.

Physical form

Solution 0.01 M phosphate buffered saline, pH 7.4, containing 15 mM sodium azide.


Unless otherwise stated in our catalog or other company documentation accompanying the product(s), our products are intended for research use only and are not to be used for any other purpose, which includes but is not limited to, unauthorized commercial uses, in vitro diagnostic uses, ex vivo or in vivo therapeutic uses or any type of consumption or application to humans or animals.

Biochem/physiol Actions

G3BP (Ras-GTPase-activating protein SH3 domain binding protein 1) exclusively cleaves between cytosine and adenine (CA). In dividing cells, G3BP interacts with RasGAP, linking between a RasGAP-mediated signaling pathway and RNA turnover. It is a RNA-binding protein that contains a carboxyl-terminal RNA binding domain, the RRM-type domain. It also has an amino-terminal domain homologous to nuclear transporter factor 2 (NTF2), and a central domain rich in acidic residues. The RRM domain is involved in the binding of G3BP to specific RNA sequences. A Ser149 residue is present 20 amino acids C terminal to the NTF2-like domain. Phosphorylation of this residue is crucial in mediating protein-protein interactions and in controlling the subcellular localization of G3BP. G3BP facilitates the assembly of stress granules that are invoved in the regulation of mRNA metabolism during stress. Dephosphorylation of Ser149 results in oligomerization and SG assembly. Overexpression of G3BP is observed in malignant tumors such as lung cancer, colon cancer, gastric cancer, and breast cancer. The level of G3BP expression in breast cancer specimens is positively correlated to the presence of lymph node metastasis.

Safety & Documentation

Safety Information

NONH for all modes of transport
Flash Point(F) 
Not applicable
Flash Point(C) 
Not applicable
Protocols & Articles


Antibody Basics

Immunoglobulins (Igs) are produced by B lymphocytes and secreted into plasma. The Ig molecule in monomeric form is a glycoprotein with a molecular weight of approximately 150 kDa that is shaped more ...
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Western Blot Protocol | Immunoblotting Protocol

Western Blotting refers to the electrophoretic transfer of proteins from sodium dodecyl sulfate polyacrylamide gels to sheets of PVDF or nitrocellullose membrane, followed by immunodetection of prote...
Keywords: AGE, Buffers, Cell disruption, Detection methods, Detergents, Dialysis, Electroblotting, Electrophoresis, Enzyme activity, Gel electrophoresis, Immunoprecipitation, PAGE, Protein extraction, Purification, Sample preparations, Western blot

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G6046 Anti-G3BP antibody produced in rabbit, ~1.0 mg/mL, affinity isolated antibody, buffered aqueous solution

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