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Dynamic Conformations of Nucleosome ...

Howell, Steven C.

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Dynamic Conformations of Nucleosome Arrays in Solution from Small-Angle X-ray Scattering.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Dynamic Conformations of Nucleosome Arrays in Solution from Small-Angle X-ray Scattering./
Author:	Howell, Steven C.
Description:	220 p.
Notes:	Source: Dissertation Abstracts International, Volume: 77-04(E), Section: B.
Contained By:	Dissertation Abstracts International77-04B(E).
Subject:	Biophysics. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3738561
ISBN:	9781339290249

Dynamic Conformations of Nucleosome Arrays in Solution from Small-Angle X-ray Scattering.
Howell, Steven C.

Dynamic Conformations of Nucleosome Arrays in Solution from Small-Angle X-ray Scattering. - 220 p.

Source: Dissertation Abstracts International, Volume: 77-04(E), Section: B.

Thesis (Ph.D.)--The George Washington University, 2016.

Chromatin conformation and dynamics remains unsolved despite the critical role of the chromatin in fundamental genetic functions such as transcription, replication, and repair. At the molecular level, chromatin can be viewed as a linear array of nucleosomes, each consisting of 147 base pairs (bp) of double-stranded DNA (dsDNA) wrapped around a protein core and connected by 10 to 90 bp of linker dsDNA.

ISBN: 9781339290249Subjects--Topical Terms:

518360
Biophysics.

Dynamic Conformations of Nucleosome Arrays in Solution from Small-Angle X-ray Scattering.
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020 $a 9781339290249
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100 1 $a Howell, Steven C. $3 3187815
245 1 0 $a Dynamic Conformations of Nucleosome Arrays in Solution from Small-Angle X-ray Scattering.
300 $a 220 p.
500 $a Source: Dissertation Abstracts International, Volume: 77-04(E), Section: B.
500 $a Adviser: Xiangyun Qiu.
502 $a Thesis (Ph.D.)--The George Washington University, 2016.
520 $a Chromatin conformation and dynamics remains unsolved despite the critical role of the chromatin in fundamental genetic functions such as transcription, replication, and repair. At the molecular level, chromatin can be viewed as a linear array of nucleosomes, each consisting of 147 base pairs (bp) of double-stranded DNA (dsDNA) wrapped around a protein core and connected by 10 to 90 bp of linker dsDNA.
520 $a Using small-angle X-ray scattering (SAXS), we investigated how the conformations of model nucleosome arrays in solution are modulated by ionic condition as well as the effect of linker histone proteins. To facilitate ensemble modeling of these SAXS measurements, we developed a simulation method that treats coarse-grained DNA as a Markov chain, then explores possible DNA conformations using Metropolis Monte Carlo (MC) sampling. This algorithm extends the functionality of SASSIE, a program used to model intrinsically disordered biological molecules, adding to the previous methods for simulating protein, carbohydrates, and single-stranded DNA. Our SAXS measurements of various nucleosome arrays together with the MC generated models provide valuable solution structure information identifying specific differences from the structure of crystallized arrays.
590 $a School code: 0075.
650 4 $a Biophysics. $3 518360
650 4 $a Physics. $3 516296
690 $a 0786
690 $a 0605
710 2 $a The George Washington University. $b Physics. $3 1266272
773 0 $t Dissertation Abstracts International $g 77-04B(E).
790 $a 0075
791 $a Ph.D.
792 $a 2016
793 $a English
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3738561