背景：RAC1 is a GTPase which belongs to the RAS superfamily of small GTP-binding proteins.
Members of this superfamily appear to regulate a diverse array of cellular events, including the control of cell growth, cytoskeletal reorganization, and the activation of protein kinases.
Two transcript variants encoding different isoforms have been found for RAC1 gene.
RAC1 is a plasma membrane-associated small GTPase which cycles between active GTP-bound and inactive GDP-bound states.
In its active state, binds to a variety of effector proteins to regulate cellular responses such as secretory processes, phagocytosis of apoptotic cells, epithelial cell polarization and growth-factor induced formation of membrane ruffles.
RAC1 p21/rho GDI heterodimer is the active component of the cytosolic factor sigma 1, which is involved in stimulation of the NADPH oxidase activity in macrophage.
RAC1 is essential for the SPATA13-mediated regulation of cell migration and adhesion assembly and disassembly.
RAC1's isoform B has an accelerated GEF-independent GDP/GTP exchange and an impaired GTP hydrolysis, which is restored partially by GTPase-activating proteins.
It is able to bind to the GTPase-binding domain of PAK but not full-length PAK in a GTP-dependent manner, suggesting that the insertion does not completely abolish effector interaction.
Stat3 is an important transcription factor that regulates both proinflammatory and anit-apoptotic pathways in the heart.
It forms a multiprotein complex with RAC1 and PKC in an H/R-dependent manner by expression of constitutively active Rac1 mutant protein, and by RNA silencing of RAC1.
Selective inhibition of PKC with calphostin C produces a marked suppression of Stat3 S727 phosphorylation.
The association of Stat3 with Rax1 occurs predominantly at the cell membrane, but also inside the nucleus, and occurs through the binding of the coiled-coil domain of Stat3 to the 54 NH（2）-terminal residues of RAC1.
Transfection with a peptide comprising the NH（2）-terminal 17 amino acid residues of RAC1-dependent signaling pathways resulting in physical association between Rac1 and Stat3 and the formation of a novel multiprotein complex with PKC.
仕様
サイズ：50ug
種由来：Human
発現宿主：Baculovirus-Insect Cells
純度：＞95 ％ as determined by reducing SDS-PAGE.
エンドトキシン濃度：＜1.0 EU per μg of the protein as determined by the LAL method.
アクセッションNo.：NP_008839.2
アミノ酸配列：Met 1-Cys 189
遺伝子構造：A DNA sequence encoding the mature form of human Rac1 isoform A （NP_008839.2） （Met 1-Cys 189） was expressed with the GST tag at the N-terminus.
別名（遺伝子名）：MIG5;p21-Rac1;Rac-1;TC-25
分子量：47 kDa
組成：Lyophilized from sterile PBS, pH 7.4
保存条件：Generally, lyophilized proteins are stable for up to 12 months when stored at -20 to -80℃. Reconstituted protein solution can be stored at 4-8℃ for 2-7 days. Aliquots of reconstituted samples are stable at ＜ -20℃ for 3 months.
