histone

Virtual Ligand screening on histone Lysine methyl transferase Virtual Ligand screening (VLS) with a small subsets of 943 compounds. 20 best docking solutions for each compounds = 18860 docking solutions using Autodock Vina.

Molecular Biology Visualization of DNA First the DNA Wrapping is animated. The wrapping allows 6 feet of the long DNA molecule to be densely packed into the tiny nucleus of every cell. The process starts when DNA is wrapped around special protein molecules called histones. The combined loop of DNA and protein is called a nuclei zone. Next the nuclei zones are packed into a thread. The end result is fiber known as chromatin. This fiber is looped and coiled yet again leading to the familiar shapes known as chromosomes which can be seen in the nucleus of dividing cells. Chromosomes are not always present - they form around the time cells divide when the two copies of the cell's DNA need to be separated. Using computer animation based on molecular research we are now able to see how DNA is actually copied in living cells. An assembly line of amazing biochemical machines are pulling apart the DNA double helix and cranking out a copy of each strand. This presentation was made by Drew Barry at The Walter and Eliza Hall Institute of Medical Research. --- It's Never too Late to Study --- Notice This video is copyright by its respectful owners. The website address on the video does not mean anything. ---

HISTONE ELISA kit Autoimmune Diseases ELISA kits: HISTONE ELISA kit ELISA kits manufacturer - ElLISA assays supplier: Diagnostic Automation/Cortez Diagnostics, Inc., Tel: 818-591 3030, USA.

Histones Histones are the chief protein components of chromatin. They act as spools around which DNA winds and they play a role in gene regulation

Soundmapping The Genes - Melodic Improvisation "Soundmapping The Genes" is a project involving music composition and improvisation based on biological data - the complete DNA genetic code of the H1 histone protein of the rainbow trout. The solo melody that appears from the beginning is the H1 protein code in its melodic form using the chromatic translation of the code. For more info, please visit:

Chromatin, Histones & Cathepsin; PMAP Cathepsin L as a protease responsible for proteolytically processing the N-terminal H3 tail. Cell. 2008 Oct 17;135(2) Chromatin is the complex basis of DNA and protein that makes up chromosomes. Changes in chromatin structure are affected by chemical modifications of histone proteins such as methylation (DNA and proteins) and acetylation (proteins), and by non-histone, DNA-binding proteins.

Histone.wmv Bio 465 Project at BYU, made with pymol and MS Movie Maker/ Paint, it is too Break by Three Days Grace.

Mitosis of furit fly embyo The mitosis of a fruit fly embryo is imaged over 1 hour via two-photon microscopy during cycle 10 to cycle 14 . The protein Histone is tagged with RFP.

Introducing Gene Music Videos: Codon Table Song and Nucleosome Structure Gene Music was born out as a DNA base-to-pitch assignment (A=la, T=sol, C=mi, G=re) and extended to amino acids to play any gene and protein of interest. This rule was rendered to music in the "Codon Table Song". Subsequently, for greater appreciation of macromolecular structures and interactions, ball-and-stick displays are made from crystallographic data. In the "Nucleosome Structure", each histone molecule is tri-colored according to secondary structure assignments (magenta-yellow for alpha helix, green-blue for beta strand and grey for other).

Histone intro Part 1.mov I thought for my grad Cell Bio course - I would break everything down Giving back since so many online give to me!

Early mitotic divisions and gastrulation of a Drosophila embryo A one hour old fly embryo containing a Histone RFP fusion protein is imaged for one hour and thirty minutes. One can track the position of the nuclei during the 9th, 10th, 11th, 12th and 13th mitotic divisions as well as during gastrulation. (Recorded by Julien Dubuis - April 2010)

Histone Deacetylation Deacetylation removes acetyl groups from histone tails, causing the histones to wrap more tightly around the DNA and interfering with the transcription of genes by blocking access by transcription factors. The overall result of histone deacetylation is a global (non specific) reduction in gene expression. Histone Deacetylase involved in a series of pathway in the living system.

How DNA is Packaged (Advanced) Each chromosome consists of one continuous thread-like molecule of DNA coiled tightly around proteins, and contains a portion of the 6400000000 basepairs (DNA building blocks) that make up your DNA. Originally created for DNA Interactive ( ). TRANSCRIPT In this animation we'll see the remarkable way our DNA is tightly packed up to fit into the nucleus of every cell. The process starts with assembly of a nucleosome, which is formed when eight separate histone protein subunits attach to the DNA molecule. The combined tight loop of DNA and protein is the nucleosome. Six nucleosomes are coiled together and these then stack on top of each other. The end result is a fiber of packed nucleosomes known as chromatin. This structure, is then looped and further packaged using other proteins (which are not shown here) to give the final "chromosomal" shapes. It is this remarkable multiple folding which allows six feet of DNA to fit into the nucleus of each cell in our body. And a typical cell nucleus is so small that ten thousand could fit on the tip of a needle. It is important to realize that chromosomes are not always present, they form only when cells are dividing. At other times, as we can see here at the end of cell division, our DNA becomes less highly organized.)

histone acetylation

Epigenetics animation clips for Windfall Films Equinox Graphics produced a series of animations to illustrate the concept of Epigenetics, whereby chemical markers on DNA can switch genes on and off - and these markers can be inherited; environmental pressures on a parent can lead to adaptation in the child. So it's not just about which genes a child inherits - their traits can be dictated by which of those genes are activated or suppressed. Clip 1) Clip showing genes in a DNA section switching on an off; Clip 2) The concept of the Epigenome - chemical markers on the backbone of the DNA which control the expression/suppression of genes; Clip 3) This sequence shows DNA coiling around support structures called histones, which then further coil into a compact superstructure (eventually the DNA will be would up still further into chromosomes). The structure is "scanned" which represents the reading of the DNA. "Histone deacetylation" causes the structure to compact tighter, making some of the DNA inaccessible, and leading to read failures (ie non-expression of that gene). Clip 4) Methylation is shown here, whereby a carbon with three hydrogens (methyl group) attaches to specific points on the DNA backbone, and this chemical marker prevents that section of the DNA being read. Clip 5) Another scanning ***ogy, showing the methylation of the histone/DNA structure, and the subsequent read failures. Windfall Films is one of the leading producers of science & technology programmes, and their science documentaries consistently ...

4D-synchronized movie of two C. elegans embryos developing. DNA decorated with Histone::GFP fusion proteins from 4-cell stage through onset of movement.

GEOMI - Histones in the cell cycle Cell cycle expression data mapped onto histone proteins and nearby interacting partners. Green: down regulation, Red: up regulation, Black: no change in expression. Colour intensity indicated level of expression change.

Histone Acetylation Medley Um... I'm such a dork. But bio lab kinda rocks. Some have requested that I post the lyrics. Here you go! Part 1: "Acetylate Me Baby, One More Time" (Britney Spears) Oh histone, histone, How was I supposed to know That you were acetylated? Oh histone, histone, We tried to connect, although... Our charge was unrelated. Show me how you changed your lysine. Tell me, histone, 'cause I need to know now—oh, because... Polymerase is transcribing me! And I must confess I want to be Differently charged with opposite signs— let's intertwine! Wrapped around you two more times! Part 2: "My Genes Don't Lie" (Shakira) Oh baby, inhibiting like that My genes, they start to unwrap— the TFs, DNase, reading the genes of my body. I'm on tonight. You know my genes don't lie and they're starting to regulate: Activation, decondensation, Don't you see this upregulation?! You know I'm on tonight, and my genes don't lie and they're starting to regulate... Part 3: "Acetylatable" (Beyonce) To the left, to the left... To the left, to the left... DNA wraps the histone complex to the left. In the nucleosome—that's my stuff. What'cha doing to my N-terminus? You must not know about me. You must not know about me. I can change my residue in a minute; Acetyl CoA, I'm gonna get it, baby. You must not know about me. You must not know about me. Get another binding site in a second, So make sure that you promptly get to thinking: I'm acetylatable. So make sure that you get to thinking: I'm acetylatable.

AACR 2009: Mamta Gupta AACR 2009: Combined Inhibition of Histone Deacetylase and mTOR: A Novel Therapeutic Approach for Pancreatic Cancer. Mamta Gupta, Ph.D., research associate, Mayo Clinic Cancer Center, gives a presentation at the 2009 AACR meeting in Denver: Combined Inhibition of Histone Deacetylase and mTOR: A Novel Therapeutic Approach for Pancreatic Cancer

A scientific Critique of the Function of Non-Coding DNA Part 1 Note that this is part one. This will be looking into junk dna Response to " Tacos25n28" Claim "Lack of H1 shortenst the lifespan of the organism... That is not true. In the multicelled filamentous ascomycete Ascolobus immersus, the single copy gene for histone H1 can be silenced by methylation in the process known as methylation-induced premeiotically (MIP). This is what shortens the lifespan. If the H1 is non existant or missing then this does not apply. Read BioEssays 22:873-877, 2000. © 2000 John Wiley & Sons, Inc This is one of many... Its more misinformation then quote mining. " I just got hold of a copy of the paper and got as far as the abstract which states: Interestingly, while none of these effects appear to decrease the immediate viability of this fungus, silencing of histone H1 results in a significant decrease in its overall life span. These results suggest that while linker histones may be dispensable for the relatively short life span of an individual cell, they are most likely indispensable for survival of higher eukaryote organisms. BioEssays 22:873±877, 2000. Im not sure what you are reading , but it doesnt sound as if this paper is saying anything other than what I wrote in my presentation. Here are a few more quotes from it: Pg 875 Thus while histone H1 depletion does not appear to have major effects on the ***ual reproduction cycle , it seriously affects the long range survival of the individual organism. Addressing the question of whether ...

Gene Regulation II This course is part of a series taught by Kevin Ahern at Oregon State University on General Biochemistry. For more information about online courses go to ecampus.oregonstate.edu 1. Negative transcriptional regulation of the lac operon is accomplished by a protein known as the lac repressor. It binds the operon's operator region and inhibits transcription. 2. In the absence of inducer molecules, the lac repressor tightly binds to the operator and inhibits transcription of the operon. When inducer molecules are present, they bind to the lac repressor and change its shape and reduce its ability to bind the operator, thus allowing the RNA polymerase to bind the promoter and start transcription. 3. CAP (also called CRP) must bind to cAMP in order to function. When CRP binds cAMP, its affinity increases for the lac operon adjacent to the RNA polymerase binding site (-68 to -55). This binding facilitates transcription of the lac operon by stimulating the binding of RNA polymerase to begin transcription. 4. When both CAP and the lac repressor are bound to the lac operon, the repressor 'wins', shutting down transcription of the operon. 5. In eukaryotic cells, DNA is wrapped up (coiled up) with basic proteins called histones. Histone sequences are strongly conserved from yeast to humans. 6. Four histones form a core around which DNA is wrapped. This core contains two copies each of histones H2A, H2B, H3, and H4. This core of proteins is called an octamer. 7. The appearance of ...

Chromatin "In this animation we'll see the way our DNA is tightly packed up to fit into the nucleus of every cell. The process starts with assembly of a nucleosome, which is formed when eight separate histone protein subunits attach to the DNA molecule. The combined tight loop of DNA and protein is the nucleosome. Six nucleosomes are coiled together and these then stack on top of each other. The end result is a fiber of packed nucleosomes known as chromatin." Essential Cell Biology, Second Edition by Alberts, Bray, Hopkin, Johnson, Lewis, Raff, Roberts, Walter copyright 2004 by Garland Science Publishing

St Ives to Cambridge Railway (fast version) A high speed walk along the St Ives railway between Fen Drayton and Cambridge. See the rails for the last time, before the dreaded guided busway takes them away for ever. The journey passes through Long Stanton, Swavesey, Oakington, Histon and outer Cambridge. See what remains of the stations. The railway hasn't been used since the 1970s (passengers) 1980s (goods) To use this valuable asset again after more than 25 years of neglect: is good! What isn't good is the poor choice the local government has made, by choosing buses over trains and trams. Trams are tops can't understand why a busway is needed. All the places it'll serve have buses already. Trains could go much further distances, faster for longer, trams could share the track, to serve Cambridge city centre, as-well as local town centres. They are cleaner too! I hope you enjoy this piece of history. Be sure to see my second film, about the remains of the other old railway that will be used by the Guided Busway, being between Cambridge Railway Station , Trumpington and Addenbrooks. Better version on Mpeg2 Quality (1Hr 10Mins) available on DVD!

Meet the Histones! They're a basic protein family.

Live Cell Confocal Imaging Mouse mammary carcinoma cells. Imaged on CV1000 Spinning Disk Confocal Labeled with histone-GFP or histone-mCherry 60X oil 1.5um steps 40 steps (60um), at 10 min intervals for 23 hrs

Mitosis Time Lapse movie of Drosophila S2 cells in mitosis. Green is Histone H2-GFP; Red is mCherry-tubulin. Images were acquired with a 100x/1.4 Oil Immersion Lens on the Spinning Disk Confocal.

SENS4 - Histone Mutation Relationships With Memory Impairment (1/2) An altered hippocampal histone code is associated with age-dependent memory impairment.

euchromatin heterochromatin histones.mov Euchromatin / Heterochromatin Breakdown to understand DNA condensation better,

3-d rotation of Histone and microtubules in a mitotic HeLa cell HeLa cells were transduced with CellLight® H2B-RFP and CellLight® MAP4-GFP. AZ section was taken of a cell in mitosis at 1um intervals and compressed in a maximum projection. The mitotic spindle and condensed chromosomes are visible

Soundmapping The Genes - Rhythmic Improvisation "Soundmapping The Genes" is a project involving music composition and improvisation based on biological data - the complete DNA genetic code of the H1 histone protein of the rainbow trout. For more info, please visit:

nucleosome Double helix DNA strands wrap up the eight histone proteins to form a nucleosome. The modification of these histones is one of the mechanisms in epigenetic inheritance.

Nucleosome: Histone Octamer and Wrapping DNA Packaging of DNA into chromosomes is achieved through the nucleosome, the basic chromatin unit. In a nucleosome, the core octamer of histones, composed of two H3(red)-H4(green) and H2A(orange)- H2B(blue), is wrapped by the 146 bp DNA in two turns (1AOI.pdb; ref. Luger et al. Nature v389, 251).

The cenH3 histone variant defines centromeres in Giardia intestinalis From the Springer article: The cenH3 histone variant defines centromeres in Giardia intestinalis by: Dawson, SC; Sagolla, MS; Cande, WZ; cenH3::GFP foci are visible in 3D stack. This movie steps through individual sections in a 3D stack of images taken at 0.2 μm depth using a cenH3::GFP strain. Individual foci are visible (MOV 2.6 MB). Journal: Chromosoma Vol. 116 Issue 2 DOI: 10.1007/s00412-006-0091-3 Published: 2007-03-13

Dr. J. Gottesfeld - HDACi for FA - euro-ATAXIA Conference - Dublin, 25th Sept. 2008 - part 1/3 Dr Joel Gottesfeld's lab in La Jolla, California (USA), is also working on heterochromatin modifiers as a potential treatment for FRDA, and Dr Gottesfeld started his talk by referencing a paper published by Richard Festenstein's group in 2003 (Nature) as the inspiration. His own work in California has supported the theory that heterochromatin gene silencing occurs in FRDA. The interaction between the active form of the frataxin gene and the inactive (silenced) form is mediated by enzymes called histone deacetylases (HDAC). To see if targeting these enzymes would result in an increase in frataxin, the researchers tested various commercially available HDAC inhibitors and found only one that was slightly active on the frataxin gene (compound BML-210). However they were then able to study derivatives of this compound and identified a compound (4B) which is active at increasing levels of frataxin mRNA and frataxin protein in cells. The next stage was to test the compound in a mouse model of FRDA, and they found that it was able to cross the blood brain barrier and enter the nervous system; it also inhibited HDAC in the brain. There are different classes of HDACs, based on whether they are zinc dependent or non-zinc dependent, and different HDAC inhibitors act on each of the different classes. It is important for research to identify which enzymes are the target, and this gives clues as to the desired chemical properties of the inhibitor. Chemical studies that his team has ...

tetranucleosome in rotation H4 tail and LRS Tetranucleosome in rotation with the H4 tail in grren, the LRS surface in pink and the DNA in blue. The nucleosomes are in blue or tan

Histone model Histone model demonstration

HDAC inhibitors.wmv Histone deacetylase (HDAC) inhibitors are new and promising anti neo plastic agents. Current methods for monitoring early response rely on invasive biopsies or indirect blood-derived markers. Our goal was to develop a magnetic resonance spectroscopy (MRS)--based method to detect HDAC inhibition.

GEOMI - Cross comparison of histones in cell cycle vs oxidative stress Using two windows of GEOMI to compare expression levels over time of histones and interacting proteins from the cell cycle to oxidative stress.

SENS4 - Histone Mutation Relationships With Memory Impairment (2/2) An altered hippocampal histone code is associated with age-dependent memory impairment.

Histones - Yesterday Histones @ Wash U Med sing Yesterday

C.elegans embryo:mCherry Histone: Red; GFP-lacI: Green Late stages of a C. elegans embryo development, going from about 50 cells to about 300. Images are taken on a spinning disk confocal. Nuclei are visualized in red by mCherry histone, and GFP-lacI (green) shows large integrated heterochromatic arrays carrying the [baf-1-GFP-lacI; myo-3-RFP] construct. See Meister et al. (2010) Genes Dev. 15, 766-82. For more information, please contact Susan Gasser: susan.gasser@fmi.ch

The World of Epigenetics This is an informational video for our Medical Informatics Elective. We would like to acknowledge Dr. Alvin Marcelo for his help in the conceptualization. We dedicate this to all sciece geeks out there! :-) Enjoy! -June and Kris