Biological Assembly 1  

 3D View: Structure

Global Symmetry: Cyclic - C2  (3D View)
Global Stoichiometry: Hetero 6-mer - A2B2C2 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 82.78 kDa 
• Atom Count: 5827 
• Residue Count: 718 
• Unique protein chains: 4

2KI6

The FGF1-S100A13-C2A hetero-hexameric complex structure: A component in the non-classical pathway for FGF1 secretion

• DOI: 10.2210/pdb2KI6/pdb

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


• Deposited: 2009-04-28 Released: 2010-03-09 
• Deposition Author(s): Krishna, S.M., Rani, S.G., Yu, C.

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Experimental Data Snapshot

• Method: SOLUTION NMR
• Conformers Calculated: 2000 
• Conformers Submitted: 18 
• Selection Criteria: structures with the least restraint violations 

Literature

The heterohexameric complex structure, a component in the non-classical pathway for fibroblast growth factor 1 (FGF1) secretion.

Mohan, S.K., Rani, S.G., Yu, C.

(2010) J Biol Chem 285: 15464-15475

• PubMed: 20220137 
• DOI: 10.1074/jbc.M109.066357
• Primary Citation of Related Structures:  
  2KI6, 2KI4


• PubMed Abstract: 
  

Fibroblast growth factors (FGFs) are key regulators of cell proliferation, tumor-induced angiogenesis, and migration. FGFs are essential for early embryonic development, organ formation, and angiogenesis. FGF1 also plays an important role in inflammation, wound healing, and restenosis. The biological effects of FGF1 are mediated through the activation of the four transmembrane phosphotyrosine kinase fibroblast growth factor receptors in the presence of heparin sulfate proteoglycans and, therefore, require the release of the protein into the extracellular space. FGF1 is exported through a non-classical release pathway involving the formation of a specific multiprotein complex. The protein constituents of this complex include FGF1, S100A13, and the p40 form of synaptotagmin 1 (Syt1). Because FGF1 plays an important role in tumor formation, it is clear that preventing the formation of the multiprotein complex would be an effective strategy to inhibit a wide range of cancers. To understand the molecular events in the FGF1 release pathway, we studied the FGF1-S100A13 tetrameric and FGF1-S100A13-C2A hexameric complex structures, which are both complexes possibly formed during the non-classical pathway of FGF1 release.

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Organizational Affiliation: 

Department of Chemistry, National Tsing Hua University, Hsinchu 30013, Taiwan.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Synaptotagmin-1	A, F	128	Homo sapiens	Mutation(s): 0  Gene Names: SYT1, SVP65, SYT
Find proteins for P21579 (Homo sapiens) Explore P21579  Go to UniProtKB:  P21579
NIH Common Fund Data Resources
PHAROS:  P21579 GTEx:  ENSG00000067715

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
Heparin-binding growth factor 1	B, E	133	Homo sapiens	Mutation(s): 0  Gene Names: FGF1, FGFA
Find proteins for P05230 (Homo sapiens) Explore P05230  Go to UniProtKB:  P05230
NIH Common Fund Data Resources
PHAROS:  P05230 GTEx:  ENSG00000113578

Entity ID: 3
Molecule	Chains	Sequence Length	Organism	Details	Image
Protein S100-A13	C	98	Homo sapiens	Mutation(s): 0  Gene Names: S100A13
Find proteins for Q99584 (Homo sapiens) Explore Q99584  Go to UniProtKB:  Q99584
NIH Common Fund Data Resources
GTEx:  ENSG00000189171

Entity ID: 4
Molecule	Chains	Sequence Length	Organism	Details	Image
Protein S100-A13	D	98	Homo sapiens	Mutation(s): 0  Gene Names: S100A13
Find proteins for Q99584 (Homo sapiens) Explore Q99584  Go to UniProtKB:  Q99584
NIH Common Fund Data Resources
GTEx:  ENSG00000189171

Experimental Data & Validation

Experimental Data

• Method: SOLUTION NMR
• Conformers Calculated: 2000 
• Conformers Submitted: 18 
• Selection Criteria: structures with the least restraint violations 
• OLDERADO: 2KI6 Olderado

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2009-04-28 
• Released Date: 2010-03-09 
Deposition Author(s): Krishna, S.M., Rani, S.G., Yu, C.

Revision History 

• Version 1.0: 2010-03-09
  Type: Initial release
  
• Version 1.1: 2011-07-13
  Changes: Version format compliance