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. Author manuscript; available in PMC: 2019 Jan 2.
Published in final edited form as: Nat Struct Mol Biol. 2018 Jul 2;25(7):583–590. doi: 10.1038/s41594-018-0086-9

Table 2. Helical parameters of the PQR export gate compared with flagellar and needle components.

Subunits per turn Axial rise (Å)
FliP (1) to FliR 5.1 5.6
FliP (2) to FliP (1) 5.6 4.9
FliP (3) to FliP (2) 5.8 3.2
FliP (3) to FliP (4) 6.0 2.3
FliP (4) to FliP (5) 6.0 3.8
Average 5.7 4.0
Flagellar Filament 5.5 4.7
Flagellar Hook 5.6 4.2
Flagellar Rod 5.6 4.1
T3SS Needle 5.6 4.3