Bethyl Laboratories, Inc.
Antibodies to Proteins Involved in
Histone Acetylation and Deacetylation
February 2010
Overview

Histone modification is central to chromatin architecture and the modulation of transcription. Histone deacetylases (HDACs) and histone acetylases (HATs) are chromatin-modifiying enzymes that catalyze the removal and addition of acetyl groups from acetyl-lysine residues on the N-terminal extensions of core histones. Acetylated histones are a key feature of actively transcribed genes. Histone acetylation and transcriptional activation is counteracted by deacetylation which results in transcriptional repression. Aberrant histone acetylation has been observed in human cancers. Recently it has become recognized that inhibiting chromatin-modifying enzymes such as HDACs may provide an avenue for the development of anti-cancer agents. Although this avenue has promise, the development of such agents still requires a more detailed analysis and better understanding of the complex regulatory mechanisms of histone acetylation.

Selected Reviews
1. P. Gallinari et al., "HDACs, Histone Deacetylation and Gene Transcription: From Molecular Biology to Cancer Therapeutics," Cell Res. 17, no. 3 (2007): 195-211.

2. J. K. Choi and L. J. Howe, "Histone Acetylation: Truth of Consequences?," Biochem.Cell Biol. 87, no. 1 (2009): 139-150.


Detection of Human HDAC6 by WB and IP.


Samples: Whole cell lysate (5, 15 and 50 mcg for WB; 1 mg for IP, 20% of IP loaded) from HeLa cells.  Antibodies: Affinity purified rabbit anti-HDAC6 antibody A301-341A used for WB at 0.04 mcg/ml (A) and 1 mcg/ml (B) and used for IP at 3 mcg/mg lysate.  HDAC6 was also immunoprecipitated by rabbit anti-HDAC6 antibody A301-342A, which recognizes a downstream epitope.  For detecting immunoprecipitated HDAC6, ReliaBLOT Reagents and Procedures (Cat. No. WB120) were used. Detection: Chemiluminescence with exposure times of 5 minutes (A) or 30 seconds (B).



Detection of Human Topo II beta by WB  and IP.

Samples: Whole cell lysate from HeLa (5, 15 and 50 mcg for WB; 1 mg for IP, 20% of IP loaded) and 293T (T; 50 mcg) cells. Antibodies: Affinity purified rabbit anti-Topo II Beta antibody A300-950A used for WB at 0.04 mcg/ml (A) and 0.1 mcg/ml (B) and used for IP at 3 mcg/mg lysate (B). Topo II Beta was also immunoprecipitated by rabbit anti-Topo II Beta antibodies A300-949A and BL4193, which recognize upstream epitopes. For detecting immunoprecipitated Topo II beta, ReliaBLOT Reagents and Procedures (Cat. No. WB120) were used.  Detection: Chemiluminescence with exposure times of 30 seconds (A) and 10 seconds (B).

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