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3c9k

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Revision as of 15:32, 11 December 2019

Model of Histone Octamer Tubular Crystals

Structural highlights

3c9k is a 8 chain structure with sequence from Gallus gallus. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Related:	2hio
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

[H4_CHICK] 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. [H2A4_CHICK] 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_CHICK] 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. [H2B7_CHICK] 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.

Evolutionary Conservation

Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf.

Publication Abstract from PubMed

A major question in chromatin involves the exact organization of nucleosomes within the 30-nm chromatin fiber and its structural determinants of assembly. Here we investigate the structure of histone octamer helical tubes via the method of iterative helical real-space reconstruction. Accurate placement of the x-ray structure of the histone octamer within the reconstructed density yields a pseudoatomic model for the entire helix, and allows precise identification of molecular interactions between neighboring octamers. One such interaction that would not be obscured by DNA in the nucleosome consists of a twofold symmetric four-helix bundle formed between pairs of H2B-alpha3 and H2B-alphaC helices of neighboring octamers. We believe that this interface can act as an internucleosomal four-helix bundle within the context of the chromatin fiber. The potential relevance of this interface in the folding of the 30-nm chromatin fiber is discussed.

Histone octamer helical tubes suggest that an internucleosomal four-helix bundle stabilizes the chromatin fiber.,Frouws TD, Patterton HG, Sewell BT Biophys J. 2009 Apr 22;96(8):3363-71. PMID:19383479^[1]

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

References

↑ Frouws TD, Patterton HG, Sewell BT. Histone octamer helical tubes suggest that an internucleosomal four-helix bundle stabilizes the chromatin fiber. Biophys J. 2009 Apr 22;96(8):3363-71. PMID:19383479 doi:http://dx.doi.org/10.1016/j.bpj.2008.10.075

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

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/3c9k"

@@ Line 1: / Line 1: @@
 ==Model of Histone Octamer Tubular Crystals==
-<StructureSection load='3c9k' size='340' side='right' caption='[[3c9k]], [[Resolution|resolution]] 20.00&Aring;' scene=''>
+<StructureSection load='3c9k' size='340' side='right'caption='[[3c9k]], [[Resolution|resolution]] 20.00&Aring;' scene=''>
 == Structural highlights ==
 <table><tr><td colspan='2'>[[3c9k]] is a 8 chain structure with sequence from [http://en.wikipedia.org/wiki/Gallus_gallus Gallus gallus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3C9K OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3C9K FirstGlance]. <br>
@@ Line 30: / Line 30: @@
 ==See Also==
-*[[Histone|Histone]]
+*[[Histone 3D structures|Histone 3D structures]]
 == References ==
 <references/>
@@ Line 36: / Line 36: @@
 </StructureSection>
 [[Category: Gallus gallus]]
+[[Category: Large Structures]]
 [[Category: Frouws, T D]]
 [[Category: Chromosomal protein]]

3c9k

From Proteopedia

Revision as of 15:32, 11 December 2019

Model of Histone Octamer Tubular Crystals

Structural highlights

Function

Evolutionary Conservation

Publication Abstract from PubMed

See Also

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

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