The application notes include recommended starting dilutions; optimal dilutions/concentrations should be determined by the end user.
1/2. Predicted molecular weight: 22 kDa.
FunctionComponent of heterochromatin that recognizes and binds histone H3 tails methylated at 'Lys-9' (H3K9me), leading to epigenetic repression. In contrast, it is excluded from chromatin when 'Tyr-41' of histone H3 is phosphorylated (H3Y41ph). Can interact with lamin-B receptor (LBR). This interaction can contribute to the association of the heterochromatin with the inner nuclear membrane. Involved in the formation of functional kinetochore through interaction with MIS12 complex proteins.
Sequence similaritiesContains 2 chromo domains.
Post-translational modificationsPhosphorylation of HP1 and LBR may be responsible for some of the alterations in chromatin organization and nuclear structure which occur at various times during the cell cycle (By similarity). Phosphorylated during interphase and possibly hyper-phosphorylated during mitosis. Ubiquitinated.
Cellular localizationNucleus. Chromosome. Chromosome > centromere. Component of centromeric and pericentromeric heterochromatin. Associates with chromosomes during mitosis. Associates specifically with chromatin during metaphase and anaphase.
Western blot - Anti-HP1 alpha antibody [HP330A] (ab107100)
Predicted band size : 22 kDa
Lane 1: Wild-type HAP1 cell lysate (20 µg) Lane 2: HP1 alpha knockout HAP1 cell lysate (20 µg) Lane 3: HeLa cell lysate (20 µg) Lane 4: MCF7 cell lysate (20 µg) Lanes 1 - 4: Merged signal (red and green). Green - ab107100 observed at 28 kDa. Red - loading control, ab181602, observed at 37 kDa.
ab107100 was shown to specifically react with HP1 alpha when HP1 alpha knockout samples were used. Wild-type and HP1 alpha knockout samples were subjected to SDS-PAGE. ab107100 and ab181602 (loading control to GAPDH) were diluted 1 µg/mL and 1/2000 respectively and incubated overnight at 4°C. Blots were developed with Goat anti-Rat IgG (H + L) (IRDye® 800CW) and Goat Anti-Rabbit IgG H&L (IRDye® 680RD) preadsorbed ab216777 secondary antibodies at 1/10 000 dilution for 1 h at room temperature before imaging.