6esf

From Proteopedia

(Difference between revisions)

Revision as of 11:02, 2 October 2019

Nucleosome : Class 1

Structural highlights

6esf is a 10 chain structure with sequence from [1] and African clawed frog. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Gene:	hist1h2aj, LOC494591 (African clawed frog)
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

[H2B11_XENLA] Core component of nucleosome. Nucleosomes wrap and compact DNA into chromatin, limiting DNA accessibility to the cellular machineries which require DNA as a template. Histones thereby play a central role in transcription regulation, DNA repair, DNA replication and chromosomal stability. DNA accessibility is regulated via a complex set of post-translational modifications of histones, also called histone code, and nucleosome remodeling. [H32_XENLA] Core component of nucleosome. Nucleosomes wrap and compact DNA into chromatin, limiting DNA accessibility to the cellular machineries which require DNA as a template. Histones thereby play a central role in transcription regulation, DNA repair, DNA replication and chromosomal stability. DNA accessibility is regulated via a complex set of post-translational modifications of histones, also called histone code, and nucleosome remodeling. [H4_XENLA] Core component of nucleosome. Nucleosomes wrap and compact DNA into chromatin, limiting DNA accessibility to the cellular machineries which require DNA as a template. Histones thereby play a central role in transcription regulation, DNA repair, DNA replication and chromosomal stability. DNA accessibility is regulated via a complex set of post-translational modifications of histones, also called histone code, and nucleosome remodeling.

Publication Abstract from PubMed

Nucleosomes, the basic units of chromatin, package and regulate expression of eukaryotic genomes. Although the structure of the intact nucleosome is well characterized, little is known about structures of partially unwrapped, transient intermediates. In this study, we present nine cryo-EM structures of distinct conformations of nucleosome and subnucleosome particles. These structures show that initial DNA breathing induces conformational changes in the histone octamer, particularly in histone H3, that propagate through the nucleosome and prevent symmetrical DNA opening. Rearrangements in the H2A-H2B dimer strengthen interaction with the unwrapping DNA and promote nucleosome stability. In agreement with this, cross-linked H2A-H2B that cannot accommodate unwrapping of the DNA is not stably maintained in the nucleosome. H2A-H2B release and DNA unwrapping occur simultaneously, indicating that DNA is essential in stabilizing the dimer in the nucleosome. Our structures reveal intrinsic nucleosomal plasticity that is required for nucleosome stability and might be exploited by extrinsic protein factors.

Histone octamer rearranges to adapt to DNA unwrapping.,Bilokapic S, Strauss M, Halic M Nat Struct Mol Biol. 2018 Jan;25(1):101-108. doi: 10.1038/s41594-017-0005-5. Epub, 2017 Dec 11. PMID:29323273^[1]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

References

↑ Bilokapic S, Strauss M, Halic M. Histone octamer rearranges to adapt to DNA unwrapping. Nat Struct Mol Biol. 2018 Jan;25(1):101-108. doi: 10.1038/s41594-017-0005-5. Epub, 2017 Dec 11. PMID:29323273 doi:http://dx.doi.org/10.1038/s41594-017-0005-5

1 Structural highlights
2 Function
3 Publication Abstract from PubMed
4 See Also
5 References

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/6esf"

@@ Line 1: / Line 1: @@
 ==Nucleosome : Class 1==
-<StructureSection load='6esf' size='340' side='right' caption='[[6esf]], [[Resolution|resolution]] 3.70&Aring;' scene=''>
+<StructureSection load='6esf' size='340' side='right'caption='[[6esf]], [[Resolution|resolution]] 3.70&Aring;' scene=''>
 == Structural highlights ==
 <table><tr><td colspan='2'>[[6esf]] is a 10 chain structure with sequence from [http://en.wikipedia.org/wiki/ ] and [http://en.wikipedia.org/wiki/African_clawed_frog African clawed frog]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6ESF OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=6ESF FirstGlance]. <br>
@@ Line 18: / Line 18: @@
 </div>
 <div class="pdbe-citations 6esf" style="background-color:#fffaf0;"></div>
+==See Also==
+*[[Histone 3D structures|Histone 3D structures]]
 == References ==
 <references/>
@@ Line 23: / Line 26: @@
 </StructureSection>
 [[Category: African clawed frog]]
+[[Category: Large Structures]]
 [[Category: Bilokapic, S]]
 [[Category: Halic, M]]

6esf

From Proteopedia

Revision as of 11:02, 2 October 2019

Nucleosome : Class 1

Structural highlights

Function

Publication Abstract from PubMed

See Also

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

Views

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