Sandbox Reserved 1410: Difference between revisions
From Proteopedia
Jump to navigationJump to search
No edit summary |
No edit summary |
||
| (33 intermediate revisions by the same user not shown) | |||
| Line 1: | Line 1: | ||
==COMPLEX BETWEEN NUCLEOSOME CORE PARTICLE (H3,H4,H2A,H2B) AND 146 BP LONG DNA FRAGMENT== | |||
== | <Structure load='1aoi' size='500' frame='true' align='right' caption='Structure of COMPLEX BETWEEN NUCLEOSOME CORE PARTICLE (H3,H4,H2A,H2B) AND 146 BP LONG DNA FRAGMENT' scene='' /> | ||
< | COMPLEX BETWEEN NUCLEOSOME CORE PARTICLE (H3,H4,H2A,H2B) AND 146 BP LONG DNA FRAGMENT is a nucleosome. | ||
== Organism of Origin == | |||
This protein comes form the African Clawed Frog (''Xenopus Laevis''). [[Image:Africanclawedfrog.jpg|thumb|left|African Clawed Frog]] | |||
This frog can swim really fast in all directions. | |||
It is legal to own this frog in Canada and Ohio. In some other states, such as Arizona, California, and Hawaii, one needs a permit to own, transport, or sell these frogs. | |||
Unfortunately, this frog is commonly infected by parasites. | |||
Fun fact: The African Clawed Frog is the only amphibian that uses claws to climb and shred food. | |||
== Structure == | |||
COMPLEX BETWEEN NUCLEOSOME CORE PARTICLE (H3,H4,H2A,H2B) AND 146 BP LONG DNA FRAGMENT is a nucleosome. | |||
There are a total of 418 <scene name='77/777730/1aoi_not_dna/2'>amino acids</scene> which make up four different histone structures on the inside (Histone H3.3C, H4, H2A type 1, and H2B 1.1). The N-terminus tails of H3 and H2B allow the histone complex to interact with other histone complexes. | |||
The <scene name='77/777730/1aoi_dna_only/1'>DNA</scene> is found on the outside. The DNA chains are 146 nucleotides long. | |||
There are also 6 manganese (II) ion <scene name='77/777730/1aoi_ligands/1'>ligands</scene> in this protein. They are all located on the DNA. | |||
Fun fact: The DNA in this protein is palindromic. | |||
== Function == | == Function == | ||
== | The hydrogen bond interactions between the histone structures and the DNA makes this molecule allow for this protein to be involved in DNA packaging, binding, and transcription. | ||
== Significance == | |||
This protein is significant because it is a nucleosome, allowing DNA to be put into higher order structures. With this complex, DNA can be stored in a highly compact manner. DNA coils around the histones, and then the nucleosomes coil around to form the chromatosome, which then fold up on each other to form a chromosome. This resulting complex also prevents unwanted binding and transcription of DNA because it is so tightly wound together. | |||
== References == | |||
https://en.wikipedia.org/wiki/African_clawed_frog | |||
http://www.ebi.ac.uk/pdbe/entry/pdb/1aoi | |||
https://www.nature.com/scitable/topicpage/dna-packaging-nucleosomes-and-chromatin-310 | |||
https://www.nature.com/articles/38444 | |||