REL RCSB RCSB RCSB 2013-05-02 2013-07-03 2014-06-25 2014-10-22 Whicher JR Dutta S Hansen DA Hale WA Chemler JA Narayan AR Hakansson K Sherman DH Smith JL Skiniotis G Type I polyketide synthase module Whicher JR Dutta S Hansen DA Hale WA Chemler JA Dosey AM Narayan ARH Hakansson K Sherman DH Smith JL Skiniotis G NATURE 510 560 564 2014 24965656 doi:10.1038/nature13409 The 5th module from the pikromycin biosynthetic pathway (PikAIII) incubated with NADPH, methylmalonyl-CoA, and thiophenol-pentaketide The 5th module from the pikromycin biosynthetic pathway (PikAIII) incubated with NADPH, methylmalonyl-CoA, and thiophenol-pentaketide

Sample was not frozen prior to loading on the grid. The sample was monodisperse.

Dimer 4 0.328 0.328 Gel filtration chromatography PikAIII Streptomyces venezuelae 0.328 0.328 2 Dimer true Escherichia coli pET28b Q9ZGI3 NADPH unidentified 1 Monomer false Methylmalonyl-CoA unidentified false Thiophenol-pentaketide unidentified false singleParticle particle 0.1 7.4

50 mM HEPES, 100mM NaCl

Glow-discharged Quantifoil R2/200 mesh grid

ETHANE 100 89 FEI VITROBOT MARK IV Blot for 1.5-2.0 seconds before plunging. FEI TECNAI F20 FLOOD BEAM BRIGHT FIELD FIELD EMISSION GUN 120 2 1.5 3.5 50000.0 66964.0 OTHER 89 89 Objective lens astigmatism was corrected at 135,000 times magnification. 2011-03-09 GATAN ULTRASCAN 4000 (4k x 4k) 462 20

The particles were selected manually.

Each micrograph

OTHER 10.7 FSC 0.5 CUT-OFF EMAN1, EMAN2 24773 2HG4 A B RIGID BODY FIT Chimera REAL 2FR0 RIGID BODY FIT Chimera REAL 2JU1 RIGID BODY FIT Chimera REAL