Biological Assembly 1  

 3D View: Structure | Electron Density | Ligand Interaction

Standalone Viewers  
Protein Workshop | Ligand Explorer

Global Symmetry: Cyclic - C3  (3D View)
Global Stoichiometry: Homo 3-mer - A3 

Biological assembly 1 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 64283.39 
• Atom Count: 3442 
• Residue Count: 568 
• Unique protein chains: 1

5EA7

Crystal Structure of Inhibitor BMS-433771 in Complex with Prefusion RSV F Glycoprotein

• DOI: 10.2210/pdb5EA7/pdb

• Classification: CELL INVASION/INHIBITOR
• Organism(s): Human respiratory syncytial virus A (strain A2)
• Expression System: Homo sapiens
• Mutation(s): 4 


• Deposited: 2015-10-15 Released: 2015-12-09 
• Deposition Author(s): Battles, M.B., McLellan, J.S., Arnoult, E., Roymans, D., Langedijk, J.P.
• Funding Organization(s): Charles H. Hood Foundation 

---

Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.851 Å
• R-Value Free: 0.241 
• R-Value Work: 0.196 

Literature

Molecular mechanism of respiratory syncytial virus fusion inhibitors.

Battles, M.B., Langedijk, J.P., Furmanova-Hollenstein, P., Chaiwatpongsakorn, S., Costello, H.M., Kwanten, L., Vranckx, L., Vink, P., Jaensch, S., Jonckers, T.H., Koul, A., Arnoult, E., Peeples, M.E., Roymans, D., McLellan, J.S.

(2016) Nat.Chem.Biol. 12: 87-93

• PubMed: 26641933 
• DOI: 10.1038/nchembio.1982
• Primary Citation of Related Structures:  
  5EA8, 5EA6, 5EA5, 5EA4, 5EA3


• PubMed Abstract: 
  

Respiratory syncytial virus (RSV) is a leading cause of pneumonia and bronchiolitis in young children and the elderly. Therapeutic small molecules have been developed that bind the RSV F glycoprotein and inhibit membrane fusion, yet their binding sites and molecular mechanisms of action remain largely unknown. Here we show that these inhibitors bind to a three-fold-symmetric pocket within the central cavity of the metastable prefusion conformation of RSV F. Inhibitor binding stabilizes this conformation by tethering two regions that must undergo a structural rearrangement to facilitate membrane fusion. Inhibitor-escape mutations occur in residues that directly contact the inhibitors or are involved in the conformational rearrangements required to accommodate inhibitor binding. Resistant viruses do not propagate as well as wild-type RSV in vitro, indicating a fitness cost for inhibitor escape. Collectively, these findings provide new insight into class I viral fusion proteins and should facilitate development of optimal RSV fusion inhibitors.

---

Organizational Affiliation: 

Department of Biochemistry, Geisel School of Medicine at Dartmouth, Hanover, New Hampshire, USA.

Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
Fusion glycoprotein F0	F	568	Human respiratory syncytial virus A (strain A2)	Mutation(s): 4  Gene Names: F
Find proteins for P03420 (Human respiratory syncytial virus A (strain A2)) Go to UniProtKB:  P03420

Small Molecules

Ligands 3 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram & Interactions
5NO	F	1-cyclopropyl-3-[[1-(4-oxidanylbutyl)benzimidazol-2-yl]methyl]imidazo[4,5-c]pyridin-2-one BMS-433771 C21 H23 N5 O2 KSHJXDWYTZJUEI-UHFFFAOYSA-N
SO4	F	SULFATE ION O4 S QAOWNCQODCNURD-UHFFFAOYSA-L
NHE	F	2-[N-CYCLOHEXYLAMINO]ETHANE SULFONIC ACID N-CYCLOHEXYLTAURINE; CHES C8 H17 N O3 S MKWKNSIESPFAQN-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.851 Å
• R-Value Free: 0.241 
• R-Value Work: 0.196 
• Space Group: P 4₁ 3 2
• Diffraction Data DOI: 
  10.15785/SBGRID/216 SBGrid

Unit Cell:

Length (Å)	Angle (°)
a = 169.590	α = 90.00
b = 169.590	β = 90.00
c = 169.590	γ = 90.00

Software Package:

Software Name	Purpose
Aimless	data scaling
PDB_EXTRACT	data extraction
PHENIX	refinement
iMOSFLM	data reduction
PHASER	phasing

Structure Validation

Entry History & Funding Information

Deposition Data

• Deposited Date: 2015-10-15 
• Released Date: 2015-12-09 
• Deposition Author(s): Battles, M.B., McLellan, J.S., Arnoult, E., Roymans, D., Langedijk, J.P.

---

Funding Organization	Location	Grant Number
Charles H. Hood Foundation	United States	--

Revision History 

• Version 1.0: 2015-12-09
  Type: Initial release
• Version 1.1: 2015-12-23
  Type: Database references
• Version 1.2: 2016-02-03
  Type: Database references