REL PDBe PDBe PDBe 2009-05-01 2009-05-20 2009-05-27 2010-04-23 Hodgkinson JL Horsley A Stabat D Simon M Johnson S da Fonseca PCA Morris EP Wall JS Lea SM Blocker AJ Shigella flexneri Type III secretion system Needle complex Microbial pathogenesis Hodgkinson JL Horsley A Stabat D Simon M Johnson S da Fonseca PC Morris EP Wall JS Lea SM Blocker AJ NAT.STRUCT.MOL.BIOL. 16 477 485 2009 19396171 doi:10.1038/nsmb.1599 Shigella flexneri T3SS needle complex Shigella flexneri T3SS needle complex

Affinity purified using His6 tag on MxiG N-term Contains detergent (see Zenk et al., 2007)

Large macromolecular complex (total list of components not yet known) 8 3.6 STEM analysis Spa24 Shigella flexneri Shigella flexneri M90T Dysentery bacillus Gram-negative bacterium Type III secretion system inner membrane protein 0.24

This is the MW of the monomer, which must be cleaved in its cytoplasmic portion during T3SS biogenesis.

Unknown false GO:0009306 IPR005773 Spa40 Shigella flexneri Shigella flexneri M90T Dysentery bacillus Gram-negative bacterium Type III secretion system polytopic-inner membrane protein 0.40

This is the MW of the monomer, which must be cleaved in its cytoplasmic portion during T3SS biogenesis.

Unknown false GO:0009306 IPR006307 MxiM Shigella flexneri Shigella flexneri M90T Dysentery bacillus Gram-negative bacterium Type III secretion system outside face of outer membrane 0.15

This is the MW of the monomer.

12 false GO:0009279 MxiI Shigella flexneri Shigella flexneri M90T Dysentery bacillus Gram-negative bacterium Type III secretion system periplasmic space 0.1

This is the MW of the monomer.

10 Helical polymer false GO:0015031 MxiG Shigella flexneri Shigella flexneri M90T Dysentery bacillus Gram-negative bacterium Type III secretion system spans inner membrane 0.43

This is the MW of the monomer.

24 Probable homo-24mer false GO:0009405 MxiJ Shigella flexneri Shigella flexneri M90T Dysentery bacillus Gram-negative bacterium Type III secretion system mostly periplasmic face of inner membrane 0.25

This is the MW of the monomer with its N-terminal lipid modification site processed (but MW of lipid moiety unknown).

12 Probable homo-dodecamer false GO:0009306 IPR006182 MxiH Shigella flexneri Shigella flexneri M90T Dysentery bacillus Gram-negative bacterium Type III secretion system Extracellular 0.09

This is the MW of the monomer.

120 helical polymer false GO:0009405 IPR011841 MxiD Shigella flexneri Shigella flexneri M90T Dysentery bacillus Gram-negative bacterium Type III secretion system Outer membrane 0.62

This is the MW of the monomer without it's signal sequence included

12 homo-dodecamer false GO:0009306 IPR003522 singleParticle particle 0.050 8.0

10mM Tris pH 8, 0.1% Triton X-100 and 1mM EDTA buffer

NEGATIVE

negatively stained in unbuffered 2% aqueous uranyl acetate

400 mesh copper grids (Athene) covered with holey carbon film over which thin plain carbon was laid were used

NONE OTHER FEI/PHILIPS CM200FEG SPOT SCAN BRIGHT FIELD FIELD EMISSION GUN 200 2.2 0.7 0.9 50000.0 48600.0 OTHER objective lens astigmatism was corrected at 100,000 times magnification

Low-dose mode was used

KODAK SO-163 FILM NIKON SUPER COOLSCAN 9000 6.35 126 20 1.0 16. eucentric

Numbers of particles given are for final reconstruction. We started with over 3000. Particles were selected using Ximdisp software, cut out to an initial box size of 400 by 400 pixel and coarsened to 2.62A per pixel using Label prior to further processing.

C12 OTHER 25.0 OTHER SPIDER IMAGIC5

Maps were generated from 41 individual images (selected through image processing out of an initial pool of 3000)

41

Imagic beta 87-93 degrees gamma 0-30 degrees

4