Primary Citation PubMed: 20616231
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Structural mechanism of trimeric HIV-1 envelope glycoprotein activation.
(2012) PLoS Pathog 8
PubMed: 22807678 | PubMedCentral: PMC3395603 | DOI: 10.1371/journal.ppat.1002797
The gp120 chain and sCD4 chains from the 1GC1 structure are shown in red, and yellow, respectively, while the gp120 and VRC01 chains from the 3NGB structure are shown in magenta and green, respectivel... .
(a–c) The gp120 portion of the gp120-VRC01 X-ray coordinates (PBD ID:3NGB) is shown after alignment to gp120 fitted to either the unliganded (a), VRC01-bound (b) or VRC03-bound (c) Env density maps to show the similarity in gp120 conformation in each of these states.
(a, b) Two orthogonal views of the superposition of gp120 polypeptides derived from the complex with sCD4 and 17b (PDB ID: 1GC1) and the complex with VRC01 (PDB ID: 3NGB).
X-ray coordinates for the gp120-VRC01 complex (PDB ID:3NGB) were fitted into the map and subsequently aligned to the gp120-CD4/17b (PDB ID:1GC1) complex.
Coordinates shown are for VRC01-bound gp120 (PDB: 3NGB), with gp120 in red and VRC01 in blue.
By fitting three copies of the X-ray structure of monomeric gp120 with VRC01 Fab (PDB ID: 3NGB) into the map, we obtained a molecular model for the VRC01-bound Env trimer.
The maps are shown with the fits obtained for the VRC01-bound map, fitted with coordinates for gp120-VRC01 Fab (PDB ID:3NGB).
(e, f) Top and side views, respectively, of the VRC01-bound HIV-1 BaL Env density map fitted with X-ray coordinates of the gp120-VRC01 Fab complex (PDB ID:3NGB).
(a, b) Top and side views, respectively, showing the superposition of VRC01-bound (blue) or b12-bound (orange) Env density maps fitted with the corresponding gp120-VRC01 (PDB ID:3NGB) or gp120-b12 (PDB ID:2NY7) coordinates.
Coordinates (PDB IDs: 3DNN, 3NGB, 3SE8, 2NY7 & 1GC1) were fitted into density maps using the software package UCSF Chimera  .
(a) Top view of the molecular coordinates for gp120 bound to VRC01 (gp120 in red, VRC01 in blue, PDB ID: 3NGB) or bound to b12 (gp120 in grey, b12 in orange, PDB ID: 2NY7).
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