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AB317725

Anti-HP1 alpha antibody [RAB-C133]

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Human Recombinant Monoclonal HP1 alpha antibody. Suitable for WB, ICC/IF, Flow Cyt (Intra) and reacts with Human samples. Immunogen corresponding to Recombinant Fragment Protein within Human CBX5 aa 1-100.

View Alternative Names

HP1A, CBX5, Chromobox protein homolog 5, Antigen p25, Heterochromatin protein 1 homolog alpha, HP1 alpha

3 Images
Flow Cytometry (Intracellular) - Anti-HP1 alpha antibody [RAB-C133] (AB317725)
  • Flow Cyt (Intra)

Supplier Data

Flow Cytometry (Intracellular) - Anti-HP1 alpha antibody [RAB-C133] (AB317725)

Paraformaldehyde fixed HeLa cells permeabilized with 0.5% Triton were stained with anti-unknown specificity antibody (isotype control, black line) or the rabbit IgG version of ab317725 (blue line) at a dilution of 1 : 100 for 1h at RT. After washing, the bound antibody was detected using a goat anti-rabbit IgG AlexaFluor® 488 antibody at a dilution of 1 : 1000.

Immunocytochemistry/ Immunofluorescence - Anti-HP1 alpha antibody [RAB-C133] (AB317725)
  • ICC/IF

Supplier Data

Immunocytochemistry/ Immunofluorescence - Anti-HP1 alpha antibody [RAB-C133] (AB317725)

Immunofluorescence analysis of paraformaldehyde fixed HeLa cells permeabilized with 0.15% Triton stained with the chimeric rabbit IgG version of ab317725 (1 : 100 dilution) for 1h followed by Alexa Fluor® 488 secondary antibody (1 : 1000 dilution), showing nuclear staining. The nuclear stain is DAPI (blue). Panels show from left-right, top-bottom primary antibody/secondary, DAPI, merged channels and an isotype control. The isotype control was an unknown specificity antibody followed by staining with Alexa Fluor® 488 secondary antibody.

Western blot - Anti-HP1 alpha antibody [RAB-C133] (AB317725)
  • WB

Supplier Data

Western blot - Anti-HP1 alpha antibody [RAB-C133] (AB317725)

Chimeric rabbit version of ab317725 was used for this WB. A primary incubation of 1h was used and protein was detected by chemiluminescence.

All lanes:

Western blot - Anti-HP1 alpha antibody [RAB-C133] (ab317725) at 0.003 µg/mL

Lane 1:

Nuclear lysates of HeLa (35ug protein in RIPA buffer)

Lane 2:

Nuclear lysates of HEK293 (35ug protein in RIPA buffer)

Lane 3:

Nuclear lysates of A431 (35ug protein in RIPA buffer)

Lane 4:

Nuclear lysates of MCF7 (35ug protein in RIPA buffer)

Lane 5:

Nuclear lysates of Jurkat (35ug protein in RIPA buffer)

Lane 6:

Nuclear lysates of K562 (35ug protein in RIPA buffer)

Secondary

All lanes:

Anti-rabbit secondary antibody

Predicted band size: 22 kDa

false

Key facts

Host species

Human

Clonality

Monoclonal

Clone number

RAB-C133

Isotype

Unknown

Light chain type

kappa

Carrier free

No

Reacts with

Human

Applications

Flow Cyt (Intra), ICC/IF, WB

applications

Immunogen

Recombinant Fragment Protein within Human CBX5 aa 1-100. The exact immunogen used to generate this antibody is proprietary information.

P45973

Specificity

This antibody recognizes CBX5 (Chromobox protein homolog 5). It binds to a folded domain, amino acids 18-75.

Reactivity data

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Properties and storage information

Form
Liquid
Purification technique
Affinity purification
Purification notes
Purified by Immobilized Metal Affinity Chromatography.
Storage buffer
pH: 7.2 Preservative: 0.02% Proclin 300 Constituents: PBS
Shipped at conditions
Blue Ice
Appropriate short-term storage duration
1-2 weeks
Appropriate short-term storage conditions
+4°C
Appropriate long-term storage conditions
-20°C
Aliquoting information
Upon delivery aliquot
Storage information
Avoid freeze / thaw cycle

Supplementary information

This supplementary information is collated from multiple sources and compiled automatically.

HP1 alpha also known as HP1a or HP1 protein is a well-studied member of the heterochromatin protein 1 family. It plays a mechanical role in chromatin organization and gene regulation by binding to histone H3 when it's methylated at lysine 9 (H3K9me). This protein has a molecular mass of approximately 22-25 kDa. HP1 alpha is commonly expressed in the nuclei of eukaryotic cells where it localizes to heterochromatin regions and influences chromatin compaction.
Biological function summary

Heterochromatin protein 1 alpha acts as a modulator of gene silencing. It is part of a larger protein complex that contains various chromatin modifiers responsible for maintaining the silent state of certain genes. By mediating these interactions HP1 alpha helps regulate transcription replication timing and DNA repair processes. This regulation is essential for the structural maintenance of heterochromatin and plays a part in chromosomal stability.

Pathways

HP1 alpha is integral in the epigenetic regulation pathway along with other well-known proteins including SUV39H1 and SUV39H2 which are histone methyltransferases. HP1 alpha also links to the DNA damage response pathway where it recruits repair factors to maintain genomic integrity. Through these pathways HP1 alpha interacts closely with proteins like BRCA1 emphasizing its role in cellular homeostasis and response to DNA damage.

Researchers associate HP1 alpha with cancer and developmental disorders. Alterations in HP1 alpha expression or function can lead to disruptions in chromatin organization contributing to oncogenesis by affecting tumor suppressor genes. Furthermore HP1 alpha links to disorders like ICF syndrome through its relationship with the DNA methylation process where it interacts with proteins such as DNMT3B. Understanding these connections provides insights into therapeutic approaches targeting epigenetic modifications in disease contexts.

Product protocols

For this product, it's our understanding that no specific protocols are required. You can visit:

Target data

Component of heterochromatin that recognizes and binds histone H3 tails methylated at 'Lys-9' (H3K9me), leading to epigenetic repression (PubMed : 40440427). In contrast, it is excluded from chromatin when 'Tyr-41' of histone H3 is phosphorylated (H3Y41ph) (PubMed : 19783980). Also recognizes and binds histone H1.4 methylated at 'Lys-26' (H1.4K26me) (PubMed : 16127177). Excluded from chromatin when histone H1.4 is Simultaneously methylated at Lys-26 (H1.4K26me) and phosphorylated at Ser-27 (H1.4S27Ph) (PubMed : 16127177). May contribute to the association of heterochromatin with the inner nuclear membrane by interactions with the lamin-B receptor (LBR) (PubMed : 19783980). Involved in the formation of kinetochore through interaction with the MIS12 complex subunit NSL1 (PubMed : 19783980, PubMed : 20231385). Required for the formation of the inner centromere (PubMed : 20231385).
See full target information CBX5

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