ANTI-HLTF

General description

HLTF (helicase-like transcription factor) is a seven DNA helicase domain containing member of the SWI/SNF (mating-type switching/sucrose non-fermenting) family. Studies in HeLa cells show six isoforms of this protein, with the full length protein having a molecular weight of 115kDa. The 95kDa form lacks the helicase domains, present at the C-terminal, which are involved in DNA repair. It is a human ortholog of yeast Rad5 protein. This protein contains a Rad5-like domain, and a SWI/SNF helicase domain. This domain contains a C2HC4 RING domain.

Immunogen

Helicase-like transcription factor recombinant protein epitope signature tag (PrEST)

Application

Anti-HLTF antibody is suitable for chromatin immunoprecipitation (ChIP). Anti-HLTF antibody produced in rabbit, a Prestige Antibody, is developed and validated by the Human Protein Atlas (HPA) project . Each antibody is tested by immunohistochemistry against hundreds of normal and disease tissues. These images can be viewed on the Human Protein Atlas (HPA) site by clicking on the Image Gallery link. The antibodies are also tested using immunofluorescence and western blotting. To view these protocols and other useful information about Prestige Antibodies and the HPA, visit sigma.com/prestige.

Biochem/physiol Actions

HLTF (helicase-like transcription factor) interacts and binds with DNA to control transcription. It utilizes the energy of ATP hydrolysis for chromatin remodeling, which is basic to multiple cellular processes. It plays a role in post-replication DNA repair, where it functions as E3 ubiquitin ligase and uniquitinates proliferating cell nuclear antigen (PCNA). This protein, along with translesion synthesis polymerases, is recruited to chromatin by the tumor suppressor protein BRCA1 (breast cancer 1, early onset). In stalled damaged DNA replication, this protein repairs the gaps in the replication fork. HLTF is hypermethylated and inactivated in multiple cancers such as, esophageal, gastric, colorectal and uterine cancer. Its expression correlates with the progression of thyroid neoplasia. Thus, it has potential as a marker to differentiate benign from malignant thyroid tumors. In cervical cancer, it increases the DNA repair capacity, and thus, confers resistance to radiotherapy.

Features and Benefits

Prestige Antibodies^® are highly characterized and extensively validated antibodies with the added benefit of all available characterization data for each target being accessible via the Human Protein Atlas portal linked just below the product name at the top of this page. The uniqueness and low cross-reactivity of the Prestige Antibodies^® to other proteins are due to a thorough selection of antigen regions, affinity purification, and stringent selection. Prestige antigen controls are available for every corresponding Prestige Antibody and can be found in the linkage section.

Every Prestige Antibody is tested in the following ways:

• IHC tissue array of 44 normal human tissues and 20 of the most common cancer type tissues.
• Protein array of 364 human recombinant protein fragments.

Linkage

Corresponding Antigen APREST73675.

Physical form

Solution in phosphate-buffered saline, pH 7.2, containing 40% glycerol and 0.02% sodium azide

Legal Information

Prestige Antibodies is a registered trademark of Sigma-Aldrich Co. LLC

Disclaimer

Unless otherwise stated in our catalog or other company documentation accompanying the product(s), our products are intended for research use only and are not to be used for any other purpose, which includes but is not limited to, unauthorized commercial uses, in vitro diagnostic uses, ex vivo or in vivo therapeutic uses or any type of consumption or application to humans or animals.