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- EMDB-6194: Negative stain electron microscopy of JRFL SOSIP liganded with VRC01 -

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Basic information

Database: EMDB / ID: 6194
TitleNegative stain electron microscopy of JRFL SOSIP liganded with VRC01
Map dataReconstruction of JRFL SOSIP liganded with VRC01
SampleJRFL SOSIP liganded with VRC01:
JRFL SOSIP gp140 / VRC01
SourceSimian-Human immunodeficiency virus / unidentified (others)
Methodsingle particle reconstruction / negative staining / 20 Å resolution
AuthorsGuenaga J / de Val N / Ward AB / Wyatt RT
CitationJournal: PLoS Pathog. / Year: 2015
Title: Well-ordered trimeric HIV-1 subtype B and C soluble spike mimetics generated by negative selection display native-like properties.
Authors: Javier Guenaga / Natalia de Val / Karen Tran / Yu Feng / Karen Satchwell / Andrew B Ward / Richard T Wyatt
DateDeposition: Nov 19, 2014 / Header (metadata) release: Dec 24, 2014 / Map release: Jan 21, 2015 / Last update: Jan 21, 2015

Structure visualization

  • Surface view with section colored by density value
  • Surface level: 23
  • Imaged by UCSF Chimera
  • Download
  • Surface view colored by cylindrical radius
  • Surface level: 23
  • Imaged by UCSF Chimera
  • Download
Movie viewer
Structure viewerEM map:
Supplemental images

Downloads & links


Fileemd_6194.map.gz (map file in CCP4 format, 16001 KB)
Projections & slices

Image control

AxesZ (Sec.)Y (Row.)X (Col.)
160 pix
2.05 Å/pix.
= 328. Å
160 pix
2.05 Å/pix.
= 328. Å
160 pix
2.05 Å/pix.
= 328. Å



Slices (1/3)

Slices (1/2)

Slices (2/3)

Images are generated by Spider.

Voxel sizeX=Y=Z: 2.05 Å
Contour Level:20.9 (by emdb), 23 (movie #1):
Minimum - Maximum-35.49940109 - 90.52243042
Average (Standard dev.)0.55622959 (6.34946108)


Space Group Number1
Map Geometry
Axis orderXYZ
CellA=B=C: 328.0 Å
α=β=γ: 90.0 deg.

CCP4 map header:

modeImage stored as Reals
Å/pix. X/Y/Z2.052.052.05
M x/y/z160160160
origin x/y/z0.0000.0000.000
length x/y/z328.000328.000328.000
start NX/NY/NZ-72-72-72
MAP C/R/S123
start NC/NR/NS000
D min/max/mean-35.49990.5220.556

Supplemental data

Sample components

Entire JRFL SOSIP liganded with VRC01

EntireName: JRFL SOSIP liganded with VRC01 / Number of components: 2
Oligomeric State: One trimer of JRFL SOSIP binds 3 VRC01 molecules
MassTheoretical: 570 kDa / Experimental: 570 kDa / Measured by: Size exclusion chromatography (SEC)

Component #1: protein, JRFL SOSIP gp140

ProteinName: JRFL SOSIP gp140 / Oligomeric Details: trimer / Number of Copies: 1 / Recombinant expression: Yes
MassTheoretical: 570 kDa / Experimental: 570 kDa
SourceSpecies: Simian-Human immunodeficiency virus
Source (engineered)Expression System: Homo sapiens (human) / Cell of expression system: HEK 293F

Component #2: protein, VRC01

ProteinName: VRC01 / Oligomeric Details: monomer / Recombinant expression: No / Number of Copies: 3
SourceSpecies: unidentified (others)

Experimental details

Sample preparation

SpecimenSpecimen state: particle / Method: negative staining
Sample solutionSpecimen conc.: 0.5 mg/ml / Buffer solution: 50 mM Tris-HCl, 150 mM NaCl / pH: 7.4
Support film400 Cu mesh grids, glow-discharged at 15 mA for 30 seconds
StainingGrids were stained for 30 seconds with 2% uranyl formate.
VitrificationInstrument: NONE / Cryogen name: NONE

Electron microscopy imaging

Experimental equipment
Model: Tecnai Spirit / Image courtesy: FEI Company
ImagingMicroscope: FEI TECNAI SPIRIT / Date: Mar 26, 2014
Electron gunElectron source: LAB6 / Accelerating voltage: 120 kV / Electron dose: 29.28 e/Å2 / Illumination mode: FLOOD BEAM
LensMagnification: 46000 X (nominal), 52000 X (calibrated) / Imaging mode: BRIGHT FIELD / Defocus: 750 - 1000 nm
Specimen HolderModel: OTHER / Tilt Angle: 0 - 40 deg.
CameraDetector: TVIPS TEMCAM-F416 (4k x 4k)

Image acquisition

Image acquisitionNumber of digital images: 192

Image processing

ProcessingMethod: single particle reconstruction / Applied symmetry: C3 (3 fold cyclic) / Number of projections: 22762
3D reconstructionSoftware: EMAN2, sparx / Resolution: 20 Å / Resolution method: FSC 0.5, gold-standard

Atomic model buiding

Modeling #1Refinement protocol: rigid body / Refinement space: REAL
Input PDB model: 3J5M

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