Biological Assembly 1  

 3D View: Structure

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

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 6.29 kDa 
• Atom Count: 189 
• Modelled Residue Count: 47 
• Deposited Residue Count: 47 
• Unique protein chains: 1

1MGX

COAGULATION FACTOR, MG(II), NMR, 7 STRUCTURES (BACKBONE ATOMS ONLY)

• DOI: 10.2210/pdb1MGX/pdb

• Classification: COAGULATION FACTOR
• Organism(s): Homo sapiens
• Mutation(s): No 


• Deposited: 1995-06-21 Released: 1996-11-08 
• Deposition Author(s): Freedman, S.J., Furie, B.C., Furie, B., Baleja, J.D.

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Experimental Data Snapshot

• Method: SOLUTION NMR
• Conformers Submitted: 7 

Literature

Identification of the phospholipid binding site in the vitamin K-dependent blood coagulation protein factor IX.

Freedman, S.J., Blostein, M.D., Baleja, J.D., Jacobs, M., Furie, B.C., Furie, B.

(1996) J Biol Chem 271: 16227-16236

• PubMed: 8663165 
• DOI: 10.1074/jbc.271.27.16227
• Primary Citation of Related Structures:  
  1MGX


• PubMed Abstract: 
  

The blood coagulation and regulatory proteins that contain gamma-carboxyglutamic acid are a part of a unique class of membrane binding proteins that require calcium for their interaction with cell membranes. Following protein biosynthesis, glutamic acids on these proteins are converted to gamma-carboxyglutamic acid (Gla) in a reaction that requires vitamin K as a cofactor. The vitamin K-dependent proteins undergo a conformational transition upon metal ion binding, but only calcium ions mediate protein-phospholipid interaction. To identify the site on Factor IX that is required for phospholipid binding, we have determined the three-dimensional structure of the Factor IX Gla domain bound to magnesium ions by NMR spectroscopy. By comparison of this structure to that of the Gla domain bound to calcium ions, we localize the membrane binding site to a highly ordered structure including residues 1-11 of the Gla domain. In the presence of Ca2+, Factor IX Gla domain peptides that contain the photoactivatable amino acid p-benzoyl-L-phenylalanine at positions 6 or 9 cross-link to phospholipid following irradiation, while peptides lacking this amino acid analog or with this analog at position 46 did not cross-link. These results indicate that the NH2 terminus of the Gla domain, specifically including leucine 6 and phenylalanine 9 in the hydrophobic patch, is the contact surface on Factor IX that interacts with the phospholipid bilayer.

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Organizational Affiliation: 

Center for Hemostasis and Thrombosis Research, Division of Hematology-Oncology, New England Medical Center, Boston, Massachusetts 02111, USA.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
COAGULATION FACTOR IX	A	47	Homo sapiens	Mutation(s): 0  Gene Names: F9 EC: 3.4.21.22
UniProt & NIH Common Fund Data Resources
Find proteins for P00740 (Homo sapiens) Explore P00740  Go to UniProtKB:  P00740
PHAROS:  P00740 GTEx:  ENSG00000101981

Small Molecules

Modified Residues  1 Unique
ID	Chains	Type	Formula	2D Diagram	Parent
CGU	A	L-PEPTIDE LINKING	C6 H9 N O6		GLU

Experimental Data & Validation

Experimental Data

• Method: SOLUTION NMR
• Conformers Submitted: 7 
• OLDERADO: 1MGX Olderado

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 1995-06-21 
• Released Date: 1996-11-08 
Deposition Author(s): Freedman, S.J., Furie, B.C., Furie, B., Baleja, J.D.

Revision History  

• Version 1.0: 1996-11-08
  Type: Initial release
  
• Version 1.1: 2008-03-24
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2017-11-29
  Changes: Derived calculations, Other