Cryo-EM structure of the MVV CSC intasome at 4.5A resolution

A supramolecular assembly mediates lentiviral DNA integration

5M0Q model was docked to new map (updated relion version and pixel size corrected) in Chimera and refined using phenix.real_space refine and interactively adjusted in coot.

MVV cleaved synaptic complex (CSC) intasome at 4.5 A resolution (re-refined)

1 M NaCl, 3 mM CaCl2 and 25 mM BisTris-HCl, pH 6.5

PELCO Ultrathin Carbon with Lacey Carbon

A 4 ul drop of freshly prepared intasome in 1 M NaCl, 3 mM CaCl2 and 25 mM BisTris-HCl pH 6.5 was applied onto glow-discharged lacey carbon grids coated with ultrathin carbon (product 01824, Ted Pella). The grids were incubated for 30 s under 100% humidity in a Vitrobot Mark IV (FEI) at 20 oC. To lower salt concentration before plunge-freezing, the grids were blotted for 0.5 s, immediately hydrated with a 4 ul drop of 200 mM NaCl, 3 mM CaCl2, and 25 mM BisTris-HCl pH 6.5 and blotted again for 2.5 s, followed by plunging into liquid ethane.

To lower salt concentration before plunge-freezing, the grids were blotted for 0.5 s, immediately hydrated with a 4-ul drop of 200 mM NaCl, 3 mM CaCl2 and 25 mM BisTris-HCl pH 6.5 and blotted again for 2.5 s followed by plunging into liquid ethane.

WIENIPLAEEEHNKWHQDAVSLHLEFGIPRTAAEDIVQQCDVCQENKMPSTLRGSNKRGIDHWQVDYTHYEDKIILVWVE
TNSGLIYAERVKGETGQEFRVQTMKWYAMFAPKSLQSDNGPAFVAESTQLLMKYLGIEHTTGIPWNPQSQALVERTHQTL
KNTLEKLIPMFNAFESALAGTLITLNIKRKGGLGTSPMDIFIFNKEQQRIQQQSKSKQEKIRFCYYRTRKRGHPGEWQGP
TQVLWGGDGAIVVKDRGTDRYLVIANKDVKFIPPPKEIQKE

(DG)(DC)(DT)(DG)(DC)(DG)(DA)(DG)(DA)(DT)(DC)(DC)(DG)(DC)(DT)(DC)(DC)(DG)(DG)(DT)
(DG)

Medical Research Council (MRC, United Kingdom)

Cryo-EM structure of the MVV CSC intasome at 4.5 A resolution (re-refined).

Integrase, intasome, MVV, nucleoprotein complex, retrovirus, VIRAL PROTEIN