Biological Assembly 1  

 3D View: Structure

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Global Symmetry: Cyclic - C2  (3D View)
Global Stoichiometry: Hetero 4-mer - A2B2 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 50036.73 
• Atom Count: 3512 
• Residue Count: 434 
• Unique protein chains: 2

2M49

Structural Insights into Human S100B and Basic Fibroblast Growth Factor (FGF2) Interaction

• DOI: 10.2210/pdb2M49/pdb
• BMRB: 18995

• Classification: CYTOKINE/METAL BINDING PROTEIN
• Organism(s): Homo sapiens
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): 2 


• Deposited: 2013-02-03 Released: 2013-12-18 
• Deposition Author(s): Gupta, A.A., Yu, C.

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Experimental Data Snapshot

• Method: SOLUTION NMR
• Conformers Calculated: 200 
• Conformers Submitted: 10 
• Selection Criteria: structures with the lowest energy 

Literature

Structural insights into the interaction of human S100B and basic fibroblast growth factor (FGF2): Effects on FGFR1 receptor signaling

Gupta, A.A., Chou, R.H., Li, H., Yang, L.W., Yu, C.

(2013) Biochim.Biophys.Acta 1834: 2606-2619

• PubMed: 24063890 
• DOI: 10.1016/j.bbapap.2013.09.012


• PubMed Abstract: 
  

S100B is a calcium sensing protein belonging to the S100 protein family with intracellular and extracellular roles. It is one of the EF hand homodimeric proteins, which is known to interact with various protein targets to regulate varied biological functions. Extracellular S100B has been recently reported to interact with FGF2 in a RAGE-independent manner. However, the recognition mechanism of S100B-FGF2 interaction at the molecular level remains unclear. In this study, the critical residues on S100B-FGF2 interface were mapped by combined information derived from NMR spectroscopy and site directed mutagenesis experiments. Utilizing NMR titration data, we generated the structural models of S100B-FGF2 complex from the computational docking program, HADDOCK which were further proved stable during 15ns unrestrained molecular dynamics (MD) simulations. Isothermal titration calorimetry studies indicated S100B interaction with FGF2 is an entropically favored process implying dominant role of hydrophobic contacts at the protein-protein interface. Residue level information of S100B interaction with FGF2 was useful to understand the varied target recognition ability of S100B and further explained its role in effecting extracellular signaling diversity. Mechanistic insights into the S100B-FGF2 complex interface and cell-based assay studies involving mutants led us to conclude the novel role of S100B in FGF2 mediated FGFR1 receptor inactivation.

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Organizational Affiliation: 

Department of Chemistry, National Tsing Hua University, Hsinchu, Taiwan.

Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
Fibroblast growth factor 2	A, C	126	Homo sapiens	Mutation(s): 2  Gene Names: FGF2 (FGFB)
Find proteins for P09038 (Homo sapiens) Go to Gene View: FGF2 Go to UniProtKB:  P09038

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details
Protein S100-B	B, D	91	Homo sapiens	Mutation(s): 0  Gene Names: S100B
Find proteins for P04271 (Homo sapiens) Go to Gene View: S100B Go to UniProtKB:  P04271

Experimental Data & Validation

Experimental Data

• Method: SOLUTION NMR
• Conformers Calculated: 200 
• Conformers Submitted: 10 
• Selection Criteria: structures with the lowest energy 

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2013-02-03 
• Released Date: 2013-12-18 
• Deposition Author(s): Gupta, A.A., Yu, C.

Revision History 

• Version 1.0: 2013-12-18
  Type: Initial release