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Histones

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Histones
proteins that dna tightly coils around to form chromosomes.
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histones -- proteins attached to the DNA of eukaryotes which allows it to be packaged into chromosomes.

Histones Very basic proteins which bind tightly to the acidic DNA to form a nucleosome - the basic building block of chromatin. They are highly conserved throughout eukaryotic evolution.

histones - basic proteins that bind and "package" eukaryotic DNA; major protein constituent of chromosomes.

Histones A highly conserved group of small basic proteins found in eukaryotes in association with DNA to form nucleosomes.

Histones act as spools around which DNA winds and they play a role in gene regulation. This enables the compaction necessary to fit the large genomes of eukaryotes inside cell nuclei. Histones act in gene regulation.

Histones are proteins that are critical in the packing of DNA into the cell and into chromatin and chromosomes. They're also very important for regulation of genes.

Histones undergo posttranslational modifications which alter their interaction with DNA and nuclear proteins. The H3 and H4 histones have long tails protruding from the nucleosome which can be covalently modified at several places.

histones
Five kinds of proteins forming complexes with Eukaryotic DNA.
...

lack histones on their chromosomes and
have a simpler form of mitosis
They do have the eukaryotic type ("9 + 2") of flagellum (two of them in fact).

A single DNA molecule, a tightly coiled strant of DNA, condensed into a compact structure in vivo by complexing with accessory histones or histone-like proteins. Chromosomes exist in pairs in higher eukaryotes.

The proteins associated with DNA are collectively known as histones. They are relatively short polypeptides which are positively charged (basic) and thus are attracted to the negatively charged (acidic) DNA.

Each DNA strand wraps around groups of small protein molecules called histones, forming a series of bead-like structures, called nucleosomes, connected by the DNA strand (as illustrated in Figure 1).

The histones are also synthesized since the new DNA must wrap itself around the histones immediately. What began as one chromosome composed of a single double-stranded DNA, becomes two chromatids each with a single double-stranded DNA molecule.

A chromosome is an organized structure consisting of DNA and histones. The set of chromosomes in a cell and any other hereditary information found in the mitochondria, chloroplasts, or other locations is collectively known as its genome.

When DNA condenses, the molecule becomes wrapped around proteins called histones. The histones are then arranged in a coiled pattern to produce a larger fiber. This larger fiber is further compacted by looping to produce looped domains.

A chemical group that is added and taken off of histones. Acetylation of histones allows transciption to occur, and deacetylation inhibits transcription.
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Chromosome organized in nucleosomes composed of histones and other protein factors.
Related
Chromosome ...

chromatin Nuclear material that gives rise to chromosomes during mitosis; complex of DNA, histones, and nonhistone proteins.
chromatoid bar Masses of RNA, visible with light microscopy, in young cysts of Entamoeba spp.

In the cell cycle, the phase in which the DNA of the chromosomes is replicated and DNA-associated proteins, such as histones, are synthesized.
systematics ...

A self-replicating DNA molecule that carries essential genetic information for growth and replication of a cell or virus. The DNA organized into a tightly packaged structure by associated histone-like proteins in bacteria and histones in eukaryotes.

Four of these paired ORFs consist of genes encoding for different core histones, three consist of genes that encode for proteins of no known related function, ...

See also: Protein, Histone, Proteins, DNA, Trans

Biology HistoneHnRNA

 
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