Biological Assembly 1  

 3D View: Structure | Electron Density | Ligand Interaction

Global Symmetry: Cyclic - C2  (3D View)
Global Stoichiometry: Hetero 4-mer - A2B Pseudo Symmetry: Asymmetric - C1 
Pseudo Stoichiometry: Hetero 4-mer - A2B1C 

Biological assembly 1 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 58.78 kDa 
• Atom Count: 3672 
• Residue Count: 479 
• Unique protein chains: 2

2C74

14-3-3 Protein Eta (Human) Complexed to Peptide

• DOI: 10.2210/pdb2C74/pdb

• Classification: SIGNALING PROTEIN/PEPTIDE
• Organism(s): Homo sapiens, synthetic construct
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): No 


• Deposited: 2005-11-17 Released: 2005-12-02 
• Deposition Author(s): Elkins, J.M., Yang, X., Smee, C.E.A., Johansson, C., Sundstrom, M., Edwards, A., Weigelt, J., Arrowsmith, C., Doyle, D.A.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.70 Å
• R-Value Free: 0.291 
• R-Value Work: 0.220 
• R-Value Observed: 0.224 

Literature

Structural basis for protein-protein interactions in the 14-3-3 protein family.

Yang, X., Lee, W.H., Sobott, F., Papagrigoriou, E., Robinson, C.V., Grossmann, J.G., Sundstrom, M., Doyle, D.A., Elkins, J.M.

(2006) Proc Natl Acad Sci U S A 103: 17237-17242

• PubMed: 17085597 
• DOI: 10.1073/pnas.0605779103
• Structures With Same Primary Citation


• PubMed Abstract: 
  

The seven members of the human 14-3-3 protein family regulate a diverse range of cell signaling pathways by formation of protein-protein complexes with signaling proteins that contain phosphorylated Ser/Thr residues within specific sequence motifs. Previously, crystal structures of three 14-3-3 isoforms (zeta, sigma, and tau) have been reported, with structural data for two isoforms deposited in the Protein Data Bank (zeta and sigma). In this study, we provide structural detail for five 14-3-3 isoforms bound to ligands, providing structural coverage for all isoforms of a human protein family. A comparative structural analysis of the seven 14-3-3 proteins revealed specificity determinants for binding of phosphopeptides in a specific orientation, target domain interaction surfaces and flexible adaptation of 14-3-3 proteins through domain movements. Specifically, the structures of the beta isoform in its apo and peptide bound forms showed that its binding site can exhibit structural flexibility to facilitate binding of its protein and peptide partners. In addition, the complex of 14-3-3 beta with the exoenzyme S peptide displayed a secondary structural element in the 14-3-3 peptide binding groove. These results show that the 14-3-3 proteins are adaptable structures in which internal flexibility is likely to facilitate recognition and binding of their interaction partners.

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Organizational Affiliation: 

Structural Genomics Consortium, University of Oxford, Botnar Research Centre, Oxford OX3 7LD, United Kingdom.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
14-3-3 PROTEIN ETA	A, B	247	Homo sapiens	Mutation(s): 0  Gene Names: YWHAH, YWHA1
Find proteins for Q04917 (Homo sapiens) Explore Q04917  Go to UniProtKB:  Q04917
NIH Common Fund Data Resources
PHAROS  Q04917 GTEx  ENSG00000128245

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details
CONSENSUS PEPTIDE MODE 1 FOR 14-3-3 PROTEINS	P, Q	7	synthetic construct	Mutation(s): 0

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
CIT	A	CITRIC ACID C6 H8 O7 KRKNYBCHXYNGOX-UHFFFAOYSA-N

Modified Residues  1 Unique
ID	Chains	Type	Formula	2D Diagram	Parent
SEP	P,Q	L-PEPTIDE LINKING	C3 H8 N O6 P		SER

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.70 Å
• R-Value Free: 0.291 
• R-Value Work: 0.220 
• R-Value Observed: 0.224 
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 75.731	α = 90
b = 75.36	β = 90
c = 113.529	γ = 90

Software Package:

Software Name	Purpose
REFMAC	refinement
MOSFLM	data reduction
SCALA	data scaling
PHASER	phasing

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2005-11-17 
• Released Date: 2005-12-02 
Deposition Author(s): Elkins, J.M., Yang, X., Smee, C.E.A., Johansson, C., Sundstrom, M., Edwards, A., Weigelt, J., Arrowsmith, C., Doyle, D.A.

Revision History 

• Version 1.0: 2005-12-02
  Type: Initial release
  
• Version 1.1: 2011-07-13
  Changes: Advisory, Refinement description, Version format compliance
• Version 1.2: 2018-01-31
  Changes: Database references, Source and taxonomy
• Version 1.3: 2019-10-09
  Changes: Data collection, Derived calculations, Other
• Version 1.4: 2020-07-29
  Changes: Derived calculations, Source and taxonomy