DNAJB1 KO cell line available to order. KO validated by Western blot. Free of charge wild type control provided. Knockout achieved by using CRISPR/Cas9, Homozygous: 29 bp deletion in exon 1.
DNAJ 1, DNAJ B1, DNAJB1 protein, DNJB1_HUMAN, DnaJ (Hsp40) homolog subfmaily B member 1, DnaJ heat shock protein family (Hsp40) member B1, DnaJ homolog subfamily B member 1, DnaJ protein homolog 1, HDJ-1, HSPF 1, Heat shock 40 kDa protein 1, Heat shock 40kD protein 1, Heat shock protein 40, Hsp 40, Human DnaJ protein 1, RSPH16B, Radial spoke 16 homolog B, Sis1
DNAJB1 KO cell line available to order. KO validated by Western blot. Free of charge wild type control provided. Knockout achieved by using CRISPR/Cas9, Homozygous: 29 bp deletion in exon 1.
Upon arrival, the vial should be stored in liquid nitrogen vapor phase and not at -80°C. Storage at -80°C may result in loss of viability.
1. Thaw the vial in 37°C water bath for approximately 1-2 minutes.
2. Transfer the cell suspension (0.8 mL) to a 15 mL/50 mL conical sterile polypropylene centrifuge tube containing 8.4 mL pre-warmed culture medium, wash vial with an additional 0.8 mL culture medium (total volume 10 mL) to collect remaining cells, and centrifuge at 201 x g (rcf) for 5 minutes at room temperature. 10 mL represents minimum recommended dilution. 20 mL represents maximum recommended dilution.
3. Resuspend the cell pellet in 5 mL pre-warmed culture medium and count using a haemocytometer or alternative cell counting method seed all remaining cells into a T25.
4. Incubate the culture at 37°C incubator with 5% CO2. Check the culture one day after revival and continue to check until 80% confluent. Media change can be given if needed.
5. Once confluent passage into an appropriate flask at a density of 2x104 cells/cm2. Seeding density is given as a guide only and should be scaled to align with individual lab schedules. Cultures should be monitored daily.
We will provide viable cells that proliferate on revival.
This product is subject to limited use licenses from The Broad Institute and ERS Genomics Limited, and is developed with patented technology. For full details of the limited use licenses and relevant patents please refer to our limited use license and patent pages.
Hsp40 also known as DnaJB1 is a member of the heat shock protein family that acts mechanically as a molecular chaperone. This protein with a mass of approximately 41 kDa assists in protein folding and stabilization preventing aggregation under stress conditions. Hsp40 proteins are widely expressed in various tissues and are important in maintaining cellular homeostasis. In addition to DnaJB1 other aliases include 3b9 and 2a7 which emphasize its variety within the Hsp40 family.
Hsp40 proteins participate in cell signaling and stress response by modulating the activity of Hsp70 forming a functional complex with it to guide protein folding processes. This process is essential for protein quality control and cellular protection. It interacts with unfolded proteins and delivers them to Hsp70 enhancing its ATPase activity necessary for the proper functioning of these molecular chaperones. The expression of Hsp40 in stress conditions highlights its importance in the protein quality control system.
Hsp40 is involved in important cellular mechanisms like the unfolded protein response and protein catabolism pathways. It works closely with Hsp70 playing a pivotal role in managing protein misfolding and aggregation vital for cellular stress response and recovery. In these pathways Hsp40's function ensures the proper folding and degradation of damaged proteins maintaining proteostasis in the cell.
Hsp40 influences the development of neurodegenerative diseases and certain cancers. Mutations or altered expression of Hsp40 can lead to disrupted protein homeostasis contributing to conditions like Alzheimer's disease and tumor progression. In Alzheimer's disease besides interacting with Hsp70 Hsp40 affects the accumulation of amyloid-beta peptides. In cancer contexts it may interact with other chaperone proteins affecting their function and therefore promoting tumor aggressiveness and resistance to stress.
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Lanes 1-4: Merged signal (red and green). Green - Anti-Hsp40 antibody [3B9.E6] ab223607 observed at 39 kDa. Red - loading control Anti-beta Tubulin antibody [EP1331Y] - Microtubule Marker ab52901 observed at kDa.
Anti-Hsp40 antibody [3B9.E6] ab223607 Anti-Hsp40 antibody [3B9.E6] was shown to specifically react with Hsp40 in wild-type HEK293T cells. Loss of signal was observed when knockout cell line ab266344 (knockout cell lysate Human DNAJB1 (Hsp40) knockout HEK-293T cell lysate ab258400) was used. Wild-type and Hsp40 knockout samples were subjected to SDS-PAGE. Anti-Hsp40 antibody [3B9.E6] ab223607 and Anti-beta Tubulin [EP1331Y] - Microtubule Marker (Anti-beta Tubulin antibody [EP1331Y] - Microtubule Marker ab52901) were incubated overnight at 4°C at 1 in 500 dilution and 1 in 20000 dilution respectively. Blots were developed with Goat anti-Rabbit IgG H&L (IRDye® 680RD) preadsorbed (Goat Anti-Rabbit IgG H&L (IRDye® 680RD) preadsorbed ab216777) and Goat anti-Mouse IgG H&L (IRDye® 800CW) preadsorbed (Goat anti-Mouse IgG H&L (IRDye® 800CW) preadsorbed ab216772) secondary antibodies at 1 in 20000 dilution for 1 hour at room temperature before imaging.
All lanes: Western blot - Anti-Hsp40 antibody [3B9.E6] (Anti-Hsp40 antibody [3B9.E6] ab223607) at 1/500 dilution
Lane 1: Wild-type HEK293T cell lysate at 20 µg
Lane 2: DNAJB1 knockout HEK293T cell lysate at 20 µg
Lane 2: Western blot - Human DNAJB1 (Hsp40) knockout HEK-293T cell line (ab266344)
Lane 3: A549 cell lysate at 20 µg
Lane 4: Daudi cell lysate at 20 µg
All lanes: Western blot - Goat Anti-Rabbit IgG H&L (IRDye® 680RD) preadsorbed (Goat Anti-Rabbit IgG H&L (IRDye® 680RD) preadsorbed ab216777) at 1/10000 dilution
Predicted band size: 38 kDa
Observed band size: 39 kDa
Representative images of DNAJB1 knockout HEK293T cells, low and high confluency examples (top left and right respectively) and wild-type HEK293T cells, low and high confluency (bottom left and right respectively) showing typical adherent, epithelial-like morphology. Images were captured at 10X magnification using an EVOS M5000 microscope.
Homozygous: 29 bp deletion in exon 1
Immunofluorescent analysis of 4% Paraformaldehyde-fixed, 0.1% TritonX-100 permeabilized DNAJB1 (Hsp40) KO HEK293T ( DNAJB1 (Hsp40) knockout human embryonic kidney epithelial cell) (ab266344) cells labelling Hsp40 with Alexa Fluor® 488 Anti-Hsp40 antibody [EPR25331-69] ab323655 at 1/50 (10.0 ug/ml) dilution (Green).
Confocal image showing nuclear and cytoplasmic staining in parental HEK293T cells and no staining in DNAJB1 (Hsp40) KO HEK293T cells(shown in green). The counterstain was observed in magenta. Nuclear DNA was labeled with DAPI (shown in blue).Image was taken with a confocal microscope(Leica-Microsystems, TCS SP8).
Alexa Fluor® 594 Anti-alpha Tubulin antibody [DM1A] - Microtubule Marker ab195889 Anti-alpha Tubulin mouse monoclonal antibody - Microtubule Marker (Alexa Fluor® 594) was used to counterstain tubulin at 1/Alexa Fluor® 594 Anti-alpha Tubulin antibody [DM1A] - Microtubule Marker ab195889 200 2.5ug/ml dilution (Magenta). The Nuclear counterstain was DAPI (Blue).
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