Download MendeleyStructure of a soluble secreted chemokine inhibitor vCCI (p35) from cowpox virus.
Carfi, A., Smith, C.A., Smolak, P.J., McGrew, J., Wiley, D.C.(1999) Proc Natl Acad Sci U S A 96: 12379-12383
- PubMed: 10535930
- DOI: https://doi.org/10.1073/pnas.96.22.12379
- Primary Citation of Related Structures:
1CQ3 - PubMed Abstract:
Most poxviruses, including variola, the causative agent of smallpox, express a secreted protein of 35 kDa, vCCI, which binds CC-chemokines with high affinity. This viral protein competes with the host cellular CC-chemokine receptors (CCRs), reducing inflammation and interfering with the host immune response. Such proteins or derivatives may have therapeutic uses as anti-inflammatory agents. We have determined the crystal structure to 1.85-A resolution of vCCI from cowpox virus, the prototype of this poxvirus virulence factor. The molecule is a beta-sandwich of topology not previously described. A patch of conserved residues on the exposed face of a beta-sheet that is strongly negatively charged might have a role in binding of CC-chemokines, which are positively charged.
Organizational Affiliation:
Laboratory of Molecular Medicine, Howard Hughes Medical Institute, The Children's Hospital, 320 Longwood Avenue, Boston, MA 02115, USA.
