REL PDBe PDBe PDBe 2012-04-04 2012-04-20 2012-09-26 2012-09-26 Electron cryo-microscopy of R-peptide precursor of Moloney murine leukemia virus Env in its native form Loving R Wu SR Sjoberg M Lindqvist B Garoff H cryo-EM, Retrovirus, spike protein, maturation cleavage, R-peptide Loving R Wu SR Sjoberg M Lindqvist B Garoff H Maturation cleavage of the murine leukemia virus Env precursor separates the transmembrane subunits to prime it for receptor triggering. PROC.NAT.ACAD.SCI.USA 109 7735 7740 2012 22547812 doi:10.1073/pnas.1118125109 Native form of the R-peptide precursor of Moloney murine leukemia virus Env Native form of the R-peptide precursor of Moloney murine leukemia virus Env Trimeric 1 0.5 0.27 Blue native polyacrylamid gel electrophoreses (gp70-Pr15E)3 Moloney murine leukemia virus Mo-MLV MOV-3 0.5 0.27
Expressed in Human Embryonic Kidney 293T cells
1 trimer true Homo sapiens pNCA singleParticle particle 0.1 7.4
50 mM Hepes, 100 mM NaCl, 1.8 mM CaCl2, 0.05% Triton X-100
 NEGATIVE
The specimen was frozen in liquid ethane and transferred to liquid nitrogen for EM inspection without staining.
400 mesh holey carbon grid. The grids were glow discharged.
 ETHANE 99 77 FEI VITROBOT MARK II Vitrified 45 msec after spraying with effector Blot for 3 seconds before plunging JEOL 2100F SPOT SCAN BRIGHT FIELD FIELD EMISSION GUN 200 2.0 2.5 4.0 43200.0 43200.0 GATAN LIQUID NITROGEN 93 96 95 Objective lens astigmatism was corrected using online FFT 0 2010-11-25 GENERIC CCD 754 9
The images were recorded by CCD camera
14. Liquid nitrogen cooled 0 0
The particles were selected using an automatic selection program and the damaged particles were removed by visual inspection
Each particle
 C3 OTHER 21.0 FSC 0.5 CUT-OFF EMAN1, EMAN2
Final maps were calculated from eight averaged datasets
4071 131 emd_2067.map.gz 1 IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) 48 48 48 -7 -7 -7 48 48 48 168.0 168.0 168.0 90.0 90.0 90.0 X Y Z -3.23596573 4.73848486 0.01330669 0.89368236 3.5 3.5 3.5 2.6 AUTHOR Reconstruction of the R-peptide precursor of Moloney murine leukemia virus Env in its native form.
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 1AOL A RIGID BODY FIT Chimera, O
Protocol: Rigid body fitting. The atomic model for the Mo-RBD was obtained using the atomic structure of the highly homologous F-RBD (Fass et al, 1997) (Protein Data Bank ID, 1AOL) and the SWISS-MODEL protein structure homology-modelling server (accessible through the ExPASy web server).
REAL