Biological Assembly 1  

 3D View: Structure

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 18.98 kDa 
• Atom Count: 1334 
• Residue Count: 166 
• Unique protein chains: 1

2KY6

Structure of ARC92VBD/MED25ACID

• DOI: 10.2210/pdb2KY6/pdb

• Classification: TRANSCRIPTION REGULATOR
• Organism(s): Homo sapiens
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): No 


• Deposited: 2010-05-14 Released: 2011-03-09 
• Deposition Author(s): Milbradt, A.G., Sun, Z.J., Selenko, P., Takeuchi, K., Naar, A.M., Wagner, G.

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Experimental Data Snapshot

• Method: SOLUTION NMR
• Conformers Calculated: 50 
• Conformers Submitted: 25 
• Selection Criteria: structures with the lowest energy 

Literature

Structure of the VP16 transactivator target in the Mediator.

Milbradt, A.G., Kulkarni, M., Yi, T., Takeuchi, K., Sun, Z.Y., Luna, R.E., Selenko, P., Naar, A.M., Wagner, G.

(2011) Nat Struct Mol Biol 18: 410-415

• PubMed: 21378963 
• DOI: 10.1038/nsmb.1999
• Primary Citation of Related Structures:  
  2KY6


• PubMed Abstract: 
  

The human Mediator coactivator complex interacts with many transcriptional activators and facilitates recruitment of RNA polymerase II to promote target gene transcription. The MED25 subunit is a critical target of the potent herpes simplex 1 viral transcriptional activator VP16. Here we determine the solution structure of the MED25 VP16-binding domain (VBD) and define its binding site for the N-terminal portion of the VP16 transactivation domain (TADn). A hydrophobic furrow, formed by a β-barrel and two α-helices in MED25 VBD, interacts tightly with VP16 TADn. Mutations in this furrow prevent binding of VP16 TAD to MED25 VBD and interfere with the ability of overexpressed MED25 VBD to inhibit VP16-dependent transcriptional activation in vivo. This detailed molecular understanding of transactivation by the benchmark activator VP16 could provide important insights into viral and cellular gene activation mechanisms.

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Organizational Affiliation: 

Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School, Boston, Massachusetts, USA.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Mediator of RNA polymerase II transcription subunit 25	A	166	Homo sapiens	Mutation(s): 0  Gene Names: MED25, ACID1, ARC92, PTOV2, TCBAP0758
Find proteins for Q71SY5 (Homo sapiens) Explore Q71SY5  Go to UniProtKB:  Q71SY5
NIH Common Fund Data Resources
PHAROS:  Q71SY5 GTEx:  ENSG00000104973

Experimental Data & Validation

Experimental Data

• Method: SOLUTION NMR
• Conformers Calculated: 50 
• Conformers Submitted: 25 
• Selection Criteria: structures with the lowest energy 
• OLDERADO: 2KY6 Olderado

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2010-05-14 
• Released Date: 2011-03-09 
Deposition Author(s): Milbradt, A.G., Sun, Z.J., Selenko, P., Takeuchi, K., Naar, A.M., Wagner, G.

Revision History 

• Version 1.0: 2011-03-09
  Type: Initial release
  
• Version 1.1: 2011-07-13
  Changes: Version format compliance