Biological Assembly 1  

 3D View: Structure | Electron Density

Pseudo Symmetry: Cyclic - C2  (3D View)
Pseudo Stoichiometry: Homo 2-mer - A2 Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 2-mer - A1B1 

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

Macromolecule Content

• Total Structure Weight: 27.40 kDa 
• Atom Count: 1927 
• Modelled Residue Count: 242 
• Deposited Residue Count: 250 
• Unique protein chains: 2

1VEU

Crystal structure of the p14/MP1 complex at 2.15 A resolution

• DOI: 10.2210/pdb1VEU/pdb

• Classification: SIGNALING PROTEIN/PROTEIN BINDING
• Organism(s): Mus musculus
• Expression System: Escherichia coli
• Mutation(s): Yes 


• Deposited: 2004-04-05 Released: 2004-08-03 
• Deposition Author(s): Kurzbauer, R., Teis, D., Maurer-Stroh, S., Eisenhaber, F., Hekman, M., Bourenkov, G.P., Bartunik, H.D., Huber, L.A., Clausen, T.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.15 Å
• R-Value Free: 0.262 
• R-Value Work: 0.201 
• R-Value Observed: 0.204 

Literature

Crystal structure of the p14/MP1 scaffolding complex: How a twin couple attaches mitogen- activated protein kinase signaling to late endosomes

Kurzbauer, R., Teis, D., De Araujo, M.E., Maurer-Stroh, S., Eisenhaber, F., Bourenkov, G.P., Bartunik, H.D., Hekman, M., Rapp, U.R., Huber, L.A., Clausen, T.

(2004) Proc Natl Acad Sci U S A 101: 10984-10989

• PubMed: 15263099 
• DOI: 10.1073/pnas.0403435101
• Primary Citation of Related Structures:  
  1VEU, 1VET


• PubMed Abstract: 
  

Signaling pathways in eukaryotic cells are often controlled by the formation of specific signaling complexes, which are coordinated by scaffold and adaptor proteins. Elucidating their molecular architecture is essential to understand the spatial and temporal regulation of cellular signaling. p14 and MP1 form a tight (K(d) = 12.8 nM) endosomal adaptor/scaffold complex, which regulates mitogen-activated protein kinase (MAPK) signaling. Here, we present the 1.9-A crystal structure of a biologically functional p14/MP1 complex. The overall topology of the individual MP1 and p14 proteins is almost identical, having a central five-stranded beta-sheet sandwiched between a two-helix and a one-helix layer. Formation of the p14/MP1 heterodimer proceeds by beta-sheet augmentation and yields a unique, almost symmetrical, complex with several potential protein-binding sites on its surface. Mutational analysis allowed identification of the p14 endosomal adaptor motif, which seems to orient the complex relative to the endosomal membrane. Two highly conserved and hydrophobic protein-binding sites are located on the opposite "cytoplasmic" face of the p14/MP1 heterodimer and might therefore function as docking sites for the target proteins extracellular regulated kinase (ERK) 1 and MAPK/ERK kinase 1. Furthermore, detailed sequence analyses revealed that MP1/p14, together with profilins, define a protein superfamily of small subcellular adaptor proteins, named ProflAP. Taken together, the presented work provides insight into the spatial regulation of MAPK signaling, illustrating how p14 and MP1 collaborate as an endosomal adaptor/scaffold complex.

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Organizational Affiliation: 

Institute for Molecular Pathology, Dr. Bohr-Gasse 7, A-1030 Vienna, Austria.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Mitogen-activated protein kinase kinase 1 interacting protein 1	A	124	Mus musculus	Mutation(s): 1  Gene Names: Lamtor3, Map2k1ip1, Mapbp, Mapksp1
Find proteins for O88653 (Mus musculus) Explore O88653  Go to UniProtKB:  O88653

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
Late endosomal/lysosomal Mp1 interacting protein	B	126	Mus musculus	Mutation(s): 5  Gene Names: Lamtor2, Mapbpip, Robld3
Find proteins for Q9JHS3 (Mus musculus) Explore Q9JHS3  Go to UniProtKB:  Q9JHS3

Small Molecules

Modified Residues  1 Unique
ID	Chains	Type	Formula	2D Diagram	Parent
MSE	A	L-PEPTIDE LINKING	C5 H11 N O2 Se		MET

External Ligand Annotations
ID	Binding Affinity (Sequence Identity %)
MP1	Kd :  12.800000190734863   nM  PDBBind

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.15 Å
• R-Value Free: 0.262 
• R-Value Work: 0.201 
• R-Value Observed: 0.204 
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 47.416	α = 90
b = 62.106	β = 90
c = 74.503	γ = 90

Software Package:

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

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2004-04-05 
• Released Date: 2004-08-03 
Deposition Author(s): Kurzbauer, R., Teis, D., Maurer-Stroh, S., Eisenhaber, F., Hekman, M., Bourenkov, G.P., Bartunik, H.D., Huber, L.A., Clausen, T.

Revision History  

• Version 1.0: 2004-08-03
  Type: Initial release
  
• Version 1.1: 2008-04-27
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance