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Blaine Bartholomew, Ph.D.

Present Title & Affiliation

Primary Appointment

Professor, Department of Epigenetics and Molecular Carcinogenesis, The University of Texas MD Anderson Cancer Center, Smithville, TX

Research Interests

My research interest is on the structure and function of ATP-dependent chromatin remodeling complexes and their mechanisms of nucleosome mobilization and reorganization. Given the size and complexity of these complexes, it has been essential for my lab to work on approaches for studying the physical interactions of remodelers with their nucleosomal substrates.  I have taken a chemical biology type approach and have applied targeted protein and DNA modifications to map specific protein-protein and protein-DNA contacts. The reporters tethered to specific target sites have been of the photochemical, proteolytic, and fluorescent types. My lab uses Saccharomyces cerevisiae as our model system because once a particular contact has been found and mapped, we have been able to mutate that region in the protein and find the in vivo effects of these mutations on chromatin structure and function as well as the effects on its biochemical activity in vitro.

I am applying related approaches to examine changes in nucleosome structure when remodeled and have developed an approach for monitoring the interactions of several locations in the histone octamer with nucleosomal DNA.  My lab is expanding and improving this technique to obtain more information about temporal changes in nucleosome structure.  I am also interested in using single molecule approaches to examine nucleosome remodeling and have been involved in two collaborations to use single molecule Fluorescence Resonance Energy Transfer and DNA methylation accessibility with bisulfite sequencing to examine SWI/SNF and ISW2 remodeling.  I am interested in finding the roles of histone modifications such as acetylation and methylation in the recruitment and regulation of the chromatin remodeler.  I am also involved in studying the interplay of histone chaperones with ATP-dependent chromatin remodelers.

Office Address

The University of Texas MD Anderson Cancer Center
1808 Park Road 1C
P.O. Box 389
Smithville, TX 78957
Phone: 512-237-9324

Education & Training

Degree-Granting Education

1988 University of California, Davis, Davis, CA, PHD, Chemistry
1982 Brigham Young University, Provo, UT, BS, Chemistry

Selected Publications

Peer-Reviewed Original Research Articles

1. Creamer KM, Job G, Shanker S, Neale GA, Lin YC, Bartholomew B , Partridge JF. The Mi-2 Homolog Mit1 Actively Positions Nucleosomes within Heterochromatin To Suppress Transcription. Mol Cell Biol 34(11):2046-61, 6/2014. e-Pub 3/2014. PMCID: PMC4019058.
2. Bartholomew B. Monomeric actin required for INO80 remodeling. Nat Struct Mol Biol 20(4):405-7, 4/2013. PMID: 23552289.
3. Hota SK, Bhardwaj SK, Deindl S, Lin YC, Zhuang X, Bartholomew B. Nucleosome mobilization by ISW2 requires the concerted action of the ATPase and SLIDE domains. Nat Struct Mol Biol 20(2):222-9, 2/2013. e-Pub 1/2013. PMCID: PMC3565048.
4. Deindl S, Hwang WL, Hota SK, Blosser TR, Prasad P, Bartholomew B, Zhuang X. ISWI remodelers slide nucleosomes with coordinated multi-base-pair entry steps and single-base-pair exit steps. Cell 152(3):442-52, 1/2013. PMCID: PMC3647478.
5. Sen P, Vivas P, Dechassa ML, Mooney AM, Poirier MG, Bartholomew B. The SnAC domain of SWI/SNF is a histone anchor required for remodeling. Mol Cell Biol 33(2):360-70, 1/2013. e-Pub 11/2012. PMCID: PMC3554119.
6. Dechassa ML, Hota SK, Sen P, Chatterjee N, Prasad P, Bartholomew B. Disparity in the DNA translocase domains of SWI/SNF and ISW2. Nucleic Acids Res 40(10):4412-21, 5/2012. e-Pub 1/2012. PMCID: PMC3378860.
7. Hota SK, Bartholomew B. Approaches for studying nucleosome movement by ATP-dependent chromatin remodeling complexes. Methods Mol Biol 809:367-80, 2012. PMID: 22113289.
8. Hota SK, Dechassa ML, Prasad P, Bartholomew B. Mapping protein-DNA and protein-protein interactions of ATP-dependent chromatin remodelers. Methods Mol Biol 809:381-409, 2012. PMID: 22113290.
9. Darst RP, Pardo CE, Pondugula S, Gangaraju VK, Nabilsi NH, Bartholomew B, Kladde MP. Simultaneous single-molecule detection of endogenous C-5 DNA methylation and chromatin accessibility using MAPit. Methods Mol Biol 833:125-41, 2012. PMID: 22183592.

Invited Articles

1. Bartholomew B. Regulating the Chromatin Landscape: Structural and Mechanistic Perspectives. Annu Rev Biochem. e-Pub 3/2014. PMID: 24606138.
2. Bartholomew B. ISWI chromatin remodeling: one primary actor or a coordinated effort? Curr Opin Struct Biol 24:150-5, 2/2014. e-Pub 2/2014. PMID: 24561830.

Last updated: 8/14/2014