Biological Assembly 1  

 3D View: Structure | Electron Density

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

Biological assembly 1 assigned by authors.

Biological Assembly 2  

 3D View: Structure | Electron Density

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

Biological assembly 2 assigned by authors.

Macromolecule Content

• Total Structure Weight: 20.04 kDa 
• Atom Count: 1346 
• Residue Count: 157 
• Unique protein chains: 1

1SV4

Crystal Structure of Yan-SAM

• DOI: 10.2210/pdb1SV4/pdb

• Classification: TRANSCRIPTION
• Organism(s): Drosophila melanogaster
• Expression System: Escherichia coli
• Mutation(s): Yes 


• Deposited: 2004-03-27 Released: 2004-07-27 
• Deposition Author(s): Qiao, F., Song, H., Kim, C.A., Sawaya, M.R., Hunter, J.B., Gingery, M., Rebay, I., Courey, A.J., Bowie, J.U.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.15 Å
• R-Value Free: 0.249 
• R-Value Work: 0.218 
• R-Value Observed: 0.218 

Literature

Derepression by depolymerization; structural insights into the regulation of yan by mae.

Qiao, F., Song, H., Kim, C.A., Sawaya, M.R., Hunter, J.B., Gingery, M., Rebay, I., Courey, A.J., Bowie, J.U.

(2004) Cell 118: 163-173

• PubMed: 15260987 
• DOI: 10.1016/j.cell.2004.07.010
• Primary Citation of Related Structures:  
  1SV0, 1SV4


• PubMed Abstract: 
  

Yan, an ETS family transcriptional repressor, is regulated by receptor tyrosine kinase signaling via the Ras/MAPK pathway. Phosphorylation and downregulation of Yan is facilitated by a protein called Mae. Yan and Mae interact through their SAM domains. We find that repression by Yan requires the formation of a higher order structure mediated by Yan-SAM polymerization. Moreover, a crystal structure of the Yan-SAM/Mae-SAM complex shows that Mae-SAM specifically recognizes a surface on Yan-SAM that is also required for Yan-SAM polymerization. Mae-SAM binds to Yan-SAM with approximately 1000-fold higher affinity than Yan-SAM binds to itself and can effectively depolymerize Yan-SAM. Mutations on Mae that specifically disrupt its SAM domain-dependent interactions with Yan disable the derepression function of Mae in vivo. Depolymerization of Yan by Mae represents a novel mechanism of transcriptional control that sensitizes Yan for regulation by receptor tyrosine kinases.

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Organizational Affiliation: 

UCLA-DOE Institute of Genomics and Proteomics, Molecular Biology Institute, Department of Chemistry and Biochemistry, University of California, Los Angeles 90095, USA.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Ets DNA-binding protein pokkuri	A, B	85	Drosophila melanogaster	Mutation(s): 1  Gene Names: aop, pok, Yan, CG3166
Find proteins for Q01842 (Drosophila melanogaster) Explore Q01842  Go to UniProtKB:  Q01842

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.15 Å
• R-Value Free: 0.249 
• R-Value Work: 0.218 
• R-Value Observed: 0.218 
• Space Group: C 1 2 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 76.51	α = 90
b = 45.41	β = 108.47
c = 55.6	γ = 90

Software Package:

Software Name	Purpose
CNS	refinement
DENZO	data reduction
SCALEPACK	data scaling
EPMR	phasing

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2004-03-27 
• Released Date: 2004-07-27 
Deposition Author(s): Qiao, F., Song, H., Kim, C.A., Sawaya, M.R., Hunter, J.B., Gingery, M., Rebay, I., Courey, A.J., Bowie, J.U.

Revision History 

• Version 1.0: 2004-07-27
  Type: Initial release
  
• Version 1.1: 2008-04-30
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance