1hq3

From Proteopedia

(Difference between revisions)

Revision as of 10:33, 30 October 2019

CRYSTAL STRUCTURE OF THE HISTONE-CORE-OCTAMER IN KCL/PHOSPHATE

Structural highlights

1hq3 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.
Ligands:	,
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.

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

The structure of the native chicken histone octamer, crystallized in 2 M KCl, 1.35 M potassium phosphate pH 6.9, has been refined at 2.15 A resolution to a final R factor of 21.4% and an R(free) of 25.2%. Unique crystal-packing interactions between histone-core octamers are strong and one of them (area 4000 A(2)) involves two chloride ions and direct interactions between six acidic amino-acid residues on one octamer and the equivalent number of basic residues on the next. These interactions are on the structured part of the octamer (not involving tails). Five phosphate ions, 23 chloride ions and 437 water molecules have been identified in the structure. The phosphate and some chloride ions bind to basic amino-acid residues that interact with DNA in the nucleosome. The binding of most of the anions and the packing interactions are unique to these crystals. In other respects, and including the positions of four chloride ions, the octamer structure is very close to that of octamers in nucleosome-core particle crystals, particularly with respect to 'docking' sequences of the histone H2As and H4s. These sequences together with the H2B-H4 four-helix bundles stabilize the histone structure in the nucleosome and prevent the dissociation of the (H2A-H2B) dimers from the (H3-H4)(2) tetramer. Possible reasons why this happens at high salt in the absence of DNA are given.

Structure of the histone-core octamer in KCl/phosphate crystals at 2.15 A resolution.,Chantalat L, Nicholson JM, Lambert SJ, Reid AJ, Donovan MJ, Reynolds CD, Wood CM, Baldwin JP Acta Crystallogr D Biol Crystallogr. 2003 Aug;59(Pt 8):1395-407. Epub 2003, Jul 23. PMID:12876341^[1]

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

References

↑ Chantalat L, Nicholson JM, Lambert SJ, Reid AJ, Donovan MJ, Reynolds CD, Wood CM, Baldwin JP. Structure of the histone-core octamer in KCl/phosphate crystals at 2.15 A resolution. Acta Crystallogr D Biol Crystallogr. 2003 Aug;59(Pt 8):1395-407. Epub 2003, Jul 23. PMID:12876341

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/1hq3"

@@ Line 1: / Line 1: @@
 ==CRYSTAL STRUCTURE OF THE HISTONE-CORE-OCTAMER IN KCL/PHOSPHATE==
-<StructureSection load='1hq3' size='340' side='right' caption='[[1hq3]], [[Resolution|resolution]] 2.15&Aring;' scene=''>
+<StructureSection load='1hq3' size='340' side='right'caption='[[1hq3]], [[Resolution|resolution]] 2.15&Aring;' scene=''>
 == Structural highlights ==
 <table><tr><td colspan='2'>[[1hq3]] 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=1HQ3 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1HQ3 FirstGlance]. <br>
@@ Line 28: / Line 28: @@
 </div>
 <div class="pdbe-citations 1hq3" style="background-color:#fffaf0;"></div>
+==See Also==
+*[[Histone 3D structures|Histone 3D structures]]
 == References ==
 <references/>
@@ Line 33: / Line 36: @@
 </StructureSection>
 [[Category: Gallus gallus]]
+[[Category: Large Structures]]
 [[Category: Baldwin, J P]]
 [[Category: Chantalat, L]]

1hq3

From Proteopedia

Revision as of 10:33, 30 October 2019

CRYSTAL STRUCTURE OF THE HISTONE-CORE-OCTAMER IN KCL/PHOSPHATE

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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