3KPE: Solution Structure Of The Respiratory Syncytial Virus (Rsv)six-Helix Bundle Complexed With Tmc353121, A Small-Moleucule Inhibitor Of Rsv

Six-helix bundle (6HB) formation is an essential step for many viruses that rely on a class I fusion protein to enter a target cell and initiate replication. Because the binding modes of small molecule inhibitors of 6HB formation are largely unknown, precisely how they disrupt 6HB formation remains unclear, and structure-based design of improved inhibitors is thus seriously hampered. Here we present the high resolution crystal structure of TMC353121, a potent inhibitor of respiratory syncytial virus (RSV), bound at a hydrophobic pocket of the 6HB formed by amino acid residues from both HR1 and HR2 heptad-repeats. Binding of TMC353121 stabilizes the interaction of HR1 and HR2 in an alternate conformation of the 6HB, in which direct binding interactions are formed between TMC353121 and both HR1 and HR2. Rather than completely preventing 6HB formation, our data indicate that TMC353121 inhibits fusion by causing a local disturbance of the natural 6HB conformation.
PDB ID: 3KPEDownload
MMDB ID: 78955
PDB Deposition Date: 2009/11/16
Updated in MMDB: 2009/12
Experimental Method:
x-ray diffraction
Resolution: 1.47  Å
Source Organism:
Similar Structures:
Biological Unit for 3KPE: hexameric; determined by author and by software (PISA)
Molecular Components in 3KPE
Label Count Molecule
Proteins (6 molecules)
Fusion Glycoprotein F0
Molecule annotation
Fusion Glycoprotein F0
Molecule annotation
Chemicals (6 molecules)
* Click molecule labels to explore molecular sequence information.

Citing MMDB