This old version of Proteopedia is provided for student assignments while the new version is undergoing repairs. Content and edits done in this old version of Proteopedia after March 1, 2026 will eventually be lost when it is retired in about June of 2026.

Apply for new accounts at the new Proteopedia. Your logins will work in both the old and new versions.

2yfw

From Proteopedia

(Difference between revisions)

Jump to: navigation, search

Revision as of 12:48, 22 July 2020

Heterotetramer structure of Kluyveromyces lactis Cse4,H4

Structural highlights

2yfw is a 8 chain structure with sequence from Candida sphaerica. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Related:	2yfv
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

[CENPA_KLULA] Histone H3-like variant which exclusively replaces conventional H3 in the nucleosome core of centromeric chromatin at the inner plate of the kinetochore. Required for recruitment and assembly of kinetochore proteins, mitotic progression and chromosome segregation. May serve as an epigenetic mark that propagates centromere identity through replication and cell division (By similarity). [Q6CMU6_KLULA] 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 (By similarity).[SAAS:SAAS00202799]

Publication Abstract from PubMed

A specialized nucleosome is a component of all eukaryotic kinetochores. The core of this nucleosome contains a centromere-specific histone, CENP-A (the Cse4 gene product in budding yeast), instead of the usual H3. Assembly of a centromeric nucleosome depends on a specific chaperone, called Scm3 in yeast and HJURP in higher eukaryotes. We describe here the structure of a complex formed by an N-terminal fragment of Scm3 with the histone-fold domains of Cse4, and H4, all prepared as recombinant proteins derived from the budding yeast Kluyveromyces lactis. The contacts of Scm3 with Cse4 explain its selectivity for the centromere-specific histone; key residues at the interface are conserved in HJURP, indicating a common mechanism for centromeric-histone deposition. We also report the structure of a (Cse4 : H4)(2) heterotetramer; comparison with the structure of the Scm3:Cse4:H4 complex shows that tetramer formation and DNA-binding require displacement of Scm3 from the nucleosome core. The two structures together suggest that specific contacts between the chaperone and Cse4, rather than an altered overall structure of the nucleosome core, determine the selective presence of Cse4 at centromeres.

Recognition of the centromere-specific histone Cse4 by the chaperone Scm3.,Cho US, Harrison SC Proc Natl Acad Sci U S A. 2011 Jun 7;108(23):9367-71. Epub 2011 May 23. PMID:21606327^[1]

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

References

↑ Cho US, Harrison SC. Recognition of the centromere-specific histone Cse4 by the chaperone Scm3. Proc Natl Acad Sci U S A. 2011 Jun 7;108(23):9367-71. Epub 2011 May 23. PMID:21606327 doi:10.1073/pnas.1106389108

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/2yfw"

@@ Line 1: / Line 1: @@
 ==Heterotetramer structure of Kluyveromyces lactis Cse4,H4==
-<StructureSection load='2yfw' size='340' side='right' caption='[[2yfw]], [[Resolution|resolution]] 2.60&Aring;' scene=''>
+<StructureSection load='2yfw' size='340' side='right'caption='[[2yfw]], [[Resolution|resolution]] 2.60&Aring;' scene=''>
 == Structural highlights ==
-<table><tr><td colspan='2'>[[2yfw]] is a 8 chain structure with sequence from [http://en.wikipedia.org/wiki/Candida_sphaerica Candida sphaerica]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2YFW OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2YFW FirstGlance]. <br>
+<table><tr><td colspan='2'>[[2yfw]] is a 8 chain structure with sequence from [http://en.wikipedia.org/wiki/Candida_sphaerica Candida sphaerica]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2YFW OCA]. For a <b>guided tour on the structure components</b> use [http://proteopedia.org/fgij/fg.htm?mol=2YFW FirstGlance]. <br>
 </td></tr><tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[2yfv|2yfv]]</td></tr>
-<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2yfw FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2yfw OCA], [http://pdbe.org/2yfw PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=2yfw RCSB], [http://www.ebi.ac.uk/pdbsum/2yfw PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=2yfw ProSAT]</span></td></tr>
+<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://proteopedia.org/fgij/fg.htm?mol=2yfw FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2yfw OCA], [http://pdbe.org/2yfw PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=2yfw RCSB], [http://www.ebi.ac.uk/pdbsum/2yfw PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=2yfw ProSAT]</span></td></tr>
 </table>
 == Function ==
@@ Line 20: / Line 20: @@
 ==See Also==
-*[[Histone|Histone]]
+*[[Histone 3D structures|Histone 3D structures]]
 == References ==
 <references/>
@@ Line 26: / Line 26: @@
 </StructureSection>
 [[Category: Candida sphaerica]]
+[[Category: Large Structures]]
 [[Category: Cho, U S]]
 [[Category: Harrison, S C]]

2yfw

From Proteopedia

Revision as of 12:48, 22 July 2020

Heterotetramer structure of Kluyveromyces lactis Cse4,H4

Structural highlights

Function

Publication Abstract from PubMed

See Also

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

Views

Personal tools

Navigation

Search

Toolbox