PPT-DNA:chromatin

interactions Exploring transcription factor binding and the epigenomic landscape Lisa Stubbs Eukaryotic genomes are complex structures comprised of modified and unmodified DNA RNA and many types of interacting proteins. Exploring transcription factor binding and the . epigenomic. landscape. Saurabh. Sinha. (several slides here are courtesy of . Lisa . Stubbs). Eukaryotic genomes . are. complex structures comprised of modified and unmodified DNA, RNA and many types of interacting proteins. interactions. Exploring transcription factor binding and the . epigenomic. landscape. Lisa Stubbs. Eukaryotic genomes . are. complex structures comprised of modified and unmodified DNA, RNA and many types of interacting proteins. interactions. Exploring transcription factor binding and the . epigenomic. landscape. Lisa Stubbs. Eukaryotic genomes . are. complex structures comprised of modified and unmodified DNA, RNA and many types of interacting proteins. Most DNA is wrapped around a “histone core”, to form nucleosomes. The classical histone protein complexes bind very tightly to DNA and prevent association with other proteins. Modifications of the classical histones, or their replacement with unusual histone types under certain conditions, can “loosen” the interaction with DNA, allowing access to transcription factors, RNA polymerase, and other proteins . The formation of a highly organized DNA-protein complex, termed as chromatin, which is a nucleoprotein complex completes the packing.. Chromatin can be defined as highly condensed chromosomes at metaphase stage, and very diffuse structures in course of . Introduction. Genetic . material DNA. . in . . eukaryotic . cells never . found as a naked molecule but always found in association . with:. i. . . Histon. . proteins. , . i. i. HMG . proteins. ,. Dr.. Karzan Mohammad. Chromatin. Eukaryotic DNA is closely associated with . proteins, . creating . chromatin. . Of two types:. Heterochromatin. Euchromatin. Chromatin. Euchromatin. Actively transcribed. Chromatin-binding factorshistone macromolecules that bind either directly or indirectly to DNA.Transcription factorhistone protein that directly binds to DNA.Architectural proteinsProteins that have a Genome in eukaryotes is large enough to be accommodated in tiny nucleus. It is required to achieve high degree of compaction for getting into the nucleus. Compaction is achieved by folding the DNA in ZOO LOGY Cell Biology Cell Regulatory Mechanisms : Chromatin Remodeling 1 Development Team Paper Coordinat or: Prof. Kuldeep K. Sharma Department of Zoology, University of Jammu Principal Investigat DEPARTMENT OF MANAGEMENT, ECONOMICS AND QUANTITATIVE METHODS Working paper n. 1/2013 ricerca_meq@unibg.it Francesca Maggioni, Marida Bertocchi, Ileana Zucchi
 Modeling chromatin fibre folding f histones. (50%). Five major . histones. ; H2A, H2B, H3, H4 and H1 highly basic (. Arg. and Lys >25%). Roger Kornberg in 1974; . Chromatin. is made up of repeating units called . nucleosomes. , each containing 200 . كاظم. semi –fluid matrix . . proteins . metabolites. Ions . fibrous lamina. What are the . functions of . nuclear . matrix . . H. ave . structural . role . in the cell . where . . phase. . separation. (LLPS) under . physiologic. . conditions. Linker. DNA . length. and . patterning. , . histone. H1, and . acetylation. modulate . chromatin. LLPS. Acetylated. . chromatin.