Biological Assembly 1  

 3D View: Structure | 1D-3D View | Validation Report

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Homo 2-mer - A2 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 16.26 kDa 
• Atom Count: 1140 
• Modelled Residue Count: 140 
• Deposited Residue Count: 140 
• Unique protein chains: 1

2LH0

NMR structure of the histone-interacting N-terminal homodimeric region of Rtt106

• PDB DOI: 10.2210/pdb2LH0/pdb
• BMRB: 17832

• Classification: CHAPERONE
• Organism(s): Saccharomyces cerevisiae S288C
• Expression System: Escherichia coli
• Mutation(s): Yes 


• Deposited: 2011-08-04 Released: 2012-02-01 
• Deposition Author(s): Hu, Q., Cui, G., Mer, G.

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Experimental Data Snapshot

• Method: SOLUTION NMR
• Conformers Calculated: 200 
• Conformers Submitted: 20 
• Selection Criteria: structures with the lowest energy 

Literature

Structural basis for recognition of H3K56-acetylated histone H3-H4 by the chaperone Rtt106.

Su, D., Hu, Q., Li, Q., Thompson, J.R., Cui, G., Fazly, A., Davies, B.A., Botuyan, M.V., Zhang, Z., Mer, G.

(2012) Nature 483: 104-107

• PubMed: 22307274 
• DOI: 10.1038/nature10861
• Primary Citation of Related Structures:  
  2LH0, 3FSS, 3TVV, 3TW1


• PubMed Abstract: 
  

Dynamic variations in the structure of chromatin influence virtually all DNA-related processes in eukaryotes and are controlled in part by post-translational modifications of histones. One such modification, the acetylation of lysine 56 (H3K56ac) in the amino-terminal α-helix (αN) of histone H3, has been implicated in the regulation of nucleosome assembly during DNA replication and repair, and nucleosome disassembly during gene transcription. In Saccharomyces cerevisiae, the histone chaperone Rtt106 contributes to the deposition of newly synthesized H3K56ac-carrying H3-H4 complex on replicating DNA, but it is unclear how Rtt106 binds H3-H4 and specifically recognizes H3K56ac as there is no apparent acetylated lysine reader domain in Rtt106. Here, we show that two domains of Rtt106 are involved in a combinatorial recognition of H3-H4. An N-terminal domain homodimerizes and interacts with H3-H4 independently of acetylation while a double pleckstrin-homology (PH) domain binds the K56-containing region of H3. Affinity is markedly enhanced upon acetylation of K56, an effect that is probably due to increased conformational entropy of the αN helix of H3. Our data support a mode of interaction where the N-terminal homodimeric domain of Rtt106 intercalates between the two H3-H4 components of the (H3-H4)(2) tetramer while two double PH domains in the Rtt106 dimer interact with each of the two H3K56ac sites in (H3-H4)(2). We show that the Rtt106-(H3-H4)(2) interaction is important for gene silencing and the DNA damage response.

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Organizational Affiliation: 

Department of Biochemistry and Molecular Biology, Mayo Clinic, Rochester, Minnesota 55905, USA.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Histone chaperone RTT106	A, B	70	Saccharomyces cerevisiae S288C	Mutation(s): 3  Gene Names: N1346, RTT106, YNL206C
UniProt
Find proteins for P40161 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c)) Explore P40161  Go to UniProtKB:  P40161

Experimental Data & Validation

Experimental Data

• Method: SOLUTION NMR
• Conformers Calculated: 200 
• Conformers Submitted: 20 
• Selection Criteria: structures with the lowest energy 
• OLDERADO: 2LH0 Olderado

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2011-08-04 
• Released Date: 2012-02-01 
Deposition Author(s): Hu, Q., Cui, G., Mer, G.

Revision History  

• Version 1.0: 2012-02-01
  Type: Initial release
  
• Version 1.1: 2012-02-15
  Changes: Database references
• Version 1.2: 2012-03-07
  Changes: Database references