RCSB PDB - 1BFC: BASIC FIBROBLAST GROWTH FACTOR COMPLEXED WITH HEPARIN HEXAMER FRAGMENT

This is version 2.2 of the entry. See complete history. 

Heparin structure and interactions with basic fibroblast growth factor.

Faham, S., Hileman, R.E., Fromm, J.R., Linhardt, R.J., Rees, D.C.

(1996) Science 271: 1116-1120

• PubMed: 8599088 Search on PubMed
• DOI: https://doi.org/10.1126/science.271.5252.1116


• PubMed Abstract: 

  Crystal structures of heparin-derived tetra- and hexasaccharides complexed with basic fibroblast growth factor (bFGF) were determined at resolutions of 1.9 and 2.2 angstroms, respectively. The heparin structure may be approximated as a helical polymer with a disaccharide rotation of 174 degrees and a translation of 8.6 angstroms along the helix axis. Both molecules bound similarly to a region of the bFGF surface containing residues asparagine-28, arginine-121, lysine-126, and glutamine-135, the hexasaccharide also interacted with an additional binding site formed by lysine-27, asparagine-102, and lysine-136. No significant conformational change in bFGF occurred upon heparin oligosaccharide binding, which suggests that heparin primarily serves to juxtapose components of the FGF signal transduction pathway.

---

Organizational Affiliation: 

Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, CA 91125, USA.

• Method: X-RAY DIFFRACTION
• Resolution: 2.20 Å
• R-Value Work:  0.188 (Depositor) 
• R-Value Observed: 0.188 (Depositor)