BaculoDirect™ C-Term Expression Kit
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Invitrogen™

BaculoDirect™ C-Term Expression Kit

El sistema de expresión de baculovirus BaculoDirect™ es un potente y versátil sistema eucariótico para la expresión de proteínas deMás información
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Número de catálogoCantidad
125620135 transfecciones
Número de catálogo 12562013
Precio (MXN)
-
Cantidad:
5 transfecciones
El sistema de expresión de baculovirus BaculoDirect™ es un potente y versátil sistema eucariótico para la expresión de proteínas de alto nivel en células de insectos. La combinación de la tecnología Gateway™ con la expresión de baculovirus hace del sistema BaculoDirect el método más rápido y fácil para la producción de baculovirus recombinante.

Cómo funciona
El ADN lineal de BaculoDirect™ (el genoma del baculovirus) está diseñado para incluir sitios de attR para una recombinación rápida y eficaz con un clon de entrada Gateway. El gen de interés se recombina del clon de entrada en el ADN lineal de BaculoDirect mediante una reacción simple de una hora de LR (Figura 1). La mezcla de reacción resultante contiene el baculovirus recombinante que transporta el gen de interés y se utiliza para transfectar células de insectos. Se elimina la necesidad de transformar bacterias y aislar un gran bácmido o cotransfectar un vector de transferencia y ADN de baculovirus lineal en células de insectos. Como resultado, el tiempo práctico se reduce considerablemente. El baculovirus purificado se puede aislar en menos de una semana.

ADN lineal Gateway
El ADN lineal de BaculoDirect está diseñado para la clonación rápida con un clon de entrada Gateway y la expresión subsiguiente en células de insectos Sf9 o Sf21. El ADN lineal incluye:

• Promotor de poliedrina fuerte para expresión de alto nivel
• Sitios R para una recombinación eficaz con cualquier vector de entrada Gateway flanqueado por attL
• Gen TK para la selección negativa utilizando ganciclovir
• Etiqueta C-terminal V5-His (kit de expresión C-terminal BaculoDirect™) o etiqueta N-terminal V5-His (kit de expresión N-terminal BaculoDirect™) para la detección con anticuerpo anti-V5 y purificación con resina quelante de níquel
• Sitio de escisión de la proteasa TEV para la eliminación de la etiqueta V5-His tras la purificación (kit de expresión N-terminal BaculoDirect)
• Gen LacZ, para garantizar la generación de una reserva de baculovirus puro, que se sustituye por su gen de interés después de la reacción recombinante de LR

Materiales adicionales necesarios, disponibles por separado: Clon de entrada Gateway.

Puede encontrar una guía de selección para elegir el vector de entrada Gateway más adecuado para su aplicación en: www.thermofisher.com/Gateway.

Para uso exclusivo en investigación. No apto para uso en procedimientos diagnósticos.
Especificaciones
Tipo de productoKit de expresión
Cantidad5 transfecciones
VectorVectores BaculoDirect
Método de clonaciónGateway
Línea de productosBaculoDirect, Gateway
PromotorPoliedrina
Etiqueta de proteínaEtiqueta His (6x), Etiqueta de epítopo V5
Unit SizeEach
Contenido y almacenamiento
Los kits de expresión BaculoDirect incluyen cinco viales de 0,3 µg de ADN lineal BaculoDirect, 125 µl de reactivo de transfección Cellfectin, células Sf9 congeladas, mezcla de enzimas Gateway LR Clonase, medio para células de insecto GIBCO de Grace no suplementado y ganciclovir.

Almacenar el ADN lineal BaculoDirect, el reactivo Cellfectin y el medio de Grace a +4 °C. Almacenar la mezcla de enzimas LR Clonase a –80 °C. Almacenar las células Sf9 en nitrógeno líquido. Se garantiza la estabilidad de todos los componentes durante 6 meses si se almacenan adecuadamente.

Preguntas frecuentes

I cannot grow this white colony in liquid culture. What should I do?

The concentration of gentamicin might be too high. Try lowering the amount to 5 µg/mL and try adding more of the colony to the culture medium.

What has happened when I see blue colonies? How about colonies which are blue in the center and white on the edges?

In the case of a blue colony, the E. coli has the bacmid and the plasmid in it, allowing the cells to survive the selection process. However, because the transposition has not occurred, the LacZ gene is not disrupted. For bulls-eye colonies, this indicates that the transposition took place when the colony was growing. Re-streaking for an isolated clone from the white portion of the mixed colony should yield some colonies where transposition occurred.

I'm getting mostly white/wild-type plaques instead of blue/recombinant plaques. What am I doing wrong?

This is typically an indication of poor homologous recombination. Check the plasmid/linear DNA ratio you used. If there are some blue plaques, however, expand those viruses and check for their protein. In our experience, they are correct, even if they were in relatively low abundance.

I've infected my cells and see large polyhedra in one cell and smaller polyhedra (more numerous) in a neighboring cell. Is this normal?

Yes, cells are infected with wild-type virus individually and will develop polyhedra at different rates until all the cells in the flask are infected. The polyhedra in cells will form in approximately 3-4 days, differing in size and number until they reach their maximum capacity and burst the cell, releasing tiny particles of virus into the medium.

I'm worried that I am not getting plaques. How many days does it take to see plaques and what size are they typically?

Normally, very small white dots show up about 5-7 days and 1 mm plaques show up around day 10. Plaques can vary in size from 1 mm to 4 mm.

Citations & References (9)

Citations & References
Abstract
Functional characterization of five novel CYP2C8 variants, G171S, R186X, R186G, K247R, and K383N, found in a Japanese population.
Authors:Hichiya H, Tanaka-Kagawa T, Soyama A, Jinno H, Koyano S, Katori N, Matsushima E, Uchiyama S, Tokunaga H, Kimura H, Minami N, Katoh M, Sugai K, Goto Y, Tamura T, Yamamoto N, Ohe Y, Kunitoh H, Nokihara H, Yoshida T, Minami H, Saijo N, Ando M, Ozawa S, Saito Y, Sawada J,
Journal:Drug Metab Dispos
PubMed ID:15716363
Cytochrome P450 2C8 is one of the primary enzymes responsible for the metabolism of a wide range of drugs such as paclitaxel, cerivastatin, and amiodarone. We have sequenced the CYP2C8 gene from 201 Japanese subjects and found five novel nonsynonymous single nucleotide polymorphisms (SNPs): 511G>A (G171S), 556C>T (R186X; X represents the translational stop ... More
Analysis of the large inactive P-TEFb complex indicates that it contains one 7SK molecule, a dimer of HEXIM1 or HEXIM2, and two P-TEFb molecules containing Cdk9 phosphorylated at threonine 186.
Authors:Li Q, Price JP, Byers SA, Cheng D, Peng J, Price DH,
Journal:J Biol Chem
PubMed ID:15965233
'Positive transcription elongation factor b (P-TEFb) regulates eukaryotic gene expression at the level of elongation, and is itself controlled by the reversible association of 7SK RNA and an RNA binding protein, HEXIM1 or HEXIM2. To further understand how P-TEFb is regulated, we analyzed the stoichiometry of all the known components ... More
HEXIM2, a HEXIM1-related protein, regulates positive transcription elongation factor b through association with 7SK.
Authors:Byers SA, Price JP, Cooper JJ, Li Q, Price DH,
Journal:J Biol Chem
PubMed ID:15713662
'The kinase activity of positive transcription elongation factor b (P-TEFb), composed of cyclin-dependent kinase 9 and cyclin T1 or T2, is required for the transition of RNA polymerase II into productive elongation. P-TEFb activity has been shown to be negatively regulated by association with the small nuclear RNA 7SK and ... More
Replication-dependent destruction of Cdt1 limits DNA replication to a single round per cell cycle in Xenopus egg extracts.
Authors:Arias EE, Walter JC,
Journal:Genes Dev
PubMed ID:15598982
'In eukaryotes, prereplication complexes (pre-RCs) containing ORC, Cdc6, Cdt1, and MCM2-7 are assembled on chromatin in the G1 phase. In S phase, when DNA replication initiates, pre-RCs are disassembled, and new pre-RC assembly is restricted until the following G1 period. As a result, DNA replication is limited to a single ... More
Characterization of Aplysia enticin and temptin, two novel water-borne protein pheromones that act in concert with attractin to stimulate mate attraction.
Authors:Cummins SF, Nichols AE, Amare A, Hummon AB, Sweedler JV, Nagle GT,
Journal:J Biol Chem
PubMed ID:15054104
'Mate attraction in Aplysia involves a long-distance water-borne signal (attractin) that is released during egg laying. Other pheromones are predicted to be released during egg laying that act in concert with albumen gland attractin to stimulate attraction, but their identities are unknown. To identify other candidate water-borne pheromones, we employed ... More