list the five major types of histone proteins,and describe what role each of the
ID: 53645 • Letter: L
Question
list the five major types of histone proteins,and describe what role each of them plays in the nucleosome. which histone proteins do you think might be the most evolutionary conserved? which are likely to be the least conserved? list the five major types of histone proteins,and describe what role each of them plays in the nucleosome. which histone proteins do you think might be the most evolutionary conserved? which are likely to be the least conserved? list the five major types of histone proteins,and describe what role each of them plays in the nucleosome. which histone proteins do you think might be the most evolutionary conserved? which are likely to be the least conserved?Explanation / Answer
The five major types histone proteins are H1, H2A, H2B, H3, and H4.
Two molecules each of H2A, H2B, H3, and H4 make up the histone octamer, which combines with DNA to form the core nucleosome particle.
The core nucleosome particles can then be assembled into the fiber by a single H1 protein.
The H3/H4 dimer makes the most important interactions with the DNA, binding to the central 60 base pairs of nucleosomal DNA. That is the reason why the H3 and H4 proteins are the most conserved of the histone proteins.
Histones H2A and H2B also form part of the nucleosome core, interacting with about 30 nucleotides on either
side of the nucleotides bound by H3 and H4.
Since H1 is not present in the nucleosome core, H1 is the least-well conserved of the major histone proteins
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