E. coli biotin ligase
(BirA) is highly specific in covalently attaching biotin to the 15
amino
acid AviTag peptide. This recombinant protein was biotinylated in
vivo
by AviTag-BirA technology, which method is BriA catalyzes amide
linkage
between the biotin and the specific lysine of the AviTag.
The tag type will
be
determined during production process. If you have specified tag
type, please tell us and we will develop the specified tag
preferentially.
產品提供形式:
Lyophilized powder
Note: We will
preferentially ship the format that we have in stock, however,
if you have any special requirement for the format, please
remark your requirement when placing the order, we will prepare
according to your demand.
復溶:
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℃/-80℃. Our default final
concentration of glycerol is 50%. Customers could use it as
reference.
儲存條件:
Store at -20°C/-80°C upon receipt, aliquoting is
necessary for
mutiple use. Avoid repeated freeze-thaw cycles.
保質期:
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.
貨期:
Delivery time may
differ from different purchasing way or location, please kindly
consult your local distributors for specific delivery time.
Note: All of our
proteins are default shipped with normal blue ice packs, if you
request to ship with dry ice, please communicate with us in
advance
and extra fees will be charged.
注意事項:
Repeated freezing and thawing is not recommended. Store working aliquots at 4°C for up to one week.
heparan sulfate basal lamina glycoprotein that plays a central role in the formation and the maintenance of the neuromuscular junction (NMJ) and directs key events in postsynaptic differentiation. This neuron-specific (z+) isoform is a component of the AGRN-LRP4 receptor complex that induces the phosphorylation and activation of MUSK. The activation of MUSK in myotubes induces the formation of NMJ by regulating different processes including the transcription of specific genes and the clustering of AChR in the postsynaptic membrane. Calcium ions are required for maximal AChR clustering. AGRN function in neurons is highly regulated by alternative splicing, glycan binding and proteolytic processing. Modulates calcium ion homeostasis in neurons, specifically by inducing an increase in cytoplasmic calcium ions. Functions differentially in the central nervous system (CNS) by inhibiting the alpha(3)-subtype of Na+/K+-ATPase and evoking depolarization at CNS synapses. This transmembrane agrin (TM-agrin) isoform, the predominate form in neurons of the brain, induces dendritic filopodia and synapse formation in mature hippocampal neurons in large part due to the attached glycosaminoglycan chains and the action of Rho-family GTPases.; Isoform 1, isoform 4, isoform 5 and isoform 6: neuron-specific (z+) isoforms that contain C-terminal insertions of 8-19 AA are potent activators of AChR clustering. Isoform 5, agrin (z+8), containing the 8-AA insert, forms a receptor complex in myotubules containing the neuronal AGRN, the muscle-specific kinase MUSK and LRP4, a member of the LDL receptor family. The splicing factors, NOVA1 and NOVA2, regulate AGRN splicing and production of the 'z' isoforms.; is involved in regulation of neurite outgrowth probably due to the presence of the glycosaminoglcan (GAG) side chains of heparan and chondroitin sulfate attached to the Ser/Thr- and Gly/Ser-rich regions. Also involved in modulation of growth factor signaling.; this released fragment is important for agrin signaling and to exert a maximal dendritic filopodia-inducing effect. All 'z' splice variants (z+) of this fragment also show an increase in the number of filopodia.
基因功能參考文獻:
compared expression of agrin isoforms with the expression of AChE-T and ColQ in the developing spinal cord at the stages before and after the formation of NMJ basal lamina PMID: 23117006
present the first crystal structure of an agrin-LRP4 complex which is essential for neuronal agrin-induced acetylcholine receptor (AChR) clustering PMID: 22302937
agrin modulates neuropathic pain through NR1 phosphorylation in GABA neurons PMID: 21068333
a model wherein the z8 insert is a Ca(2+)-responsive allosteric element that is essential in forming an active conformation in neuronal a PMID: 20566625
Agrin binds BMP2, BMP4 and TGFbeta1 with relatively high affinity. PMID: 20505824
different regions within the agrin protein are responsible for synapse formation at the neuromuscular junction and for process formation in central nervous system neurons PMID: 19940118
The expression of agrin was studied during muscle development in a novel three-dimensional muscle-neuronal coculture system. PMID: 12955494
Agrin deletion mutants show that axonal targeting of agrin depends on multiple domains that function in an additive fashion, including the very N-terminal portions and the C-terminal half of the molecule. PMID: 14697677
Agrn becomes concentrated at neuroeffector and neuromuscular juncions in developing urinary bladder. PMID: 15711988
Agrin may play a pivotal role in synaptogenesis in promoting a rapid switch between electrical coupling and synaptic neurotransmission. PMID: 15883200
Agrin plays a role as a regulator of intercellular communication particularly junctional electric coupling and synapatic remodeling. PMID: 16274639
Results suggest that by positively regulating filopodia in developing neurons, transmembrane agrin may influence the pattern of neurite outgrowth and synapse formation. PMID: 16860570
Agrin, released from neurons, controls the maturation of the excitation-contraction coupling mechanism and due to modulation of RyRs and L-type Ca(2+) channels. A role for neural agrin in skeletal muscle maturation is proposed. PMID: 18003748
Agrin plays an important role in the sprouting phase of reactive synaptogenesis; both its expression and distribution are correlated with extent of successful recovery after TBI. PMID: 18627255
increasing the concentration of an ECM molecule, i.e. agrin, may enhance nicotine effects on pCREB PMID: 18639611
transient post-ischemic hypothermia stabilizes brain vessels and reduces blood brain barrier disruption in part by preventing proteolytic degradation of regulatory basement membrane constituents, SPARC and agrin PMID: 19285050
The results suggest a physiological role for Tm-agrin in the maturation of hippocampal neurons involving positive regulation of dendritic filopodia and promotion of synaptogenesis, but also suggest a role for axonal agrin in synaptogenesis. PMID: 19524020
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亞細胞定位:
Cell junction, synapse. Cell membrane; Single-pass type II membrane protein.