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8wiw

Cryo-EM structure of the flagellar C ring in the CW state

Method: ELECTRON MICROSCOPY
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1. Protein Identity and Related Structures Protein Identity & Related Structures

Flagellar motor switch protein FliN

OrganismNot specified

UniProt P26419

State in the Current Structure

Assembly Physical composition Protein state Molecular copy count Associated components Data consistency
1 Protein heterocomplex Heteromer Protein 238 Flagellar M-ring protein × 34 （P15928） Flagellar motor switch protein FliM × 34 （P26418） Flagellar motor switch protein FliG × 34 （P0A1J9） Chemotaxis protein CheY × 34 （P0A2D5） Consistent with protein count

Other States of the Same Protein in the Database

Monomer

None

Homodimer

None

Homotetramer

None

Other homooligomers

None

Heteromeric or nucleic-acid complex
4yxb 4yxb 4yxc 8umx 8uox 8upl 8vib 8vid 8vkq 8vkr 8wiw 8wo5

18 assemblies; showing the first 12

View Construct and Data Evidence
UniProt name FLIN_SALTY
Isoform —
PDB entities 1
Chains and sequence ranges Author chain 0； PDBConstruct 1–137； UniProt 1–137 Author chain 1； PDBConstruct 1–137； UniProt 1–137 Author chain 2； PDBConstruct 1–137； UniProt 1–137 Author chain 5； PDBConstruct 1–137； UniProt 1–137 Author chain 6； PDBConstruct 1–137； UniProt 1–137 Author chain A1； PDBConstruct 1–137； UniProt 1–137 Author chain A6； PDBConstruct 1–137； UniProt 1–137 Author chain A7； PDBConstruct 1–137； UniProt 1–137 Author chain A8； PDBConstruct 1–137； UniProt 1–137 Author chain AA； PDBConstruct 1–137； UniProt 1–137 Author chain AB； PDBConstruct 1–137； UniProt 1–137 Author chain AC； PDBConstruct 1–137； UniProt 1–137 Author chain AD； PDBConstruct 1–137； UniProt 1–137 Author chain AE； PDBConstruct 1–137； UniProt 1–137 Author chain AF； PDBConstruct 1–137； UniProt 1–137 Author chain AG； PDBConstruct 1–137； UniProt 1–137 Author chain AH； PDBConstruct 1–137； UniProt 1–137 Author chain AI； PDBConstruct 1–137； UniProt 1–137 Author chain AJ； PDBConstruct 1–137； UniProt 1–137 Author chain AK； PDBConstruct 1–137； UniProt 1–137 Author chain AO； PDBConstruct 1–137； UniProt 1–137 Author chain AP； PDBConstruct 1–137； UniProt 1–137 Author chain AQ； PDBConstruct 1–137； UniProt 1–137 Author chain AU； PDBConstruct 1–137； UniProt 1–137 Author chain AV； PDBConstruct 1–137； UniProt 1–137 Author chain AW； PDBConstruct 1–137； UniProt 1–137 Author chain Aa； PDBConstruct 1–137； UniProt 1–137 Author chain Ab； PDBConstruct 1–137； UniProt 1–137 Author chain Ac； PDBConstruct 1–137； UniProt 1–137 Author chain Ag； PDBConstruct 1–137； UniProt 1–137 Author chain Ah； PDBConstruct 1–137； UniProt 1–137 Author chain Ai； PDBConstruct 1–137； UniProt 1–137 Author chain Am； PDBConstruct 1–137； UniProt 1–137 Author chain An； PDBConstruct 1–137； UniProt 1–137 Author chain Ao； PDBConstruct 1–137； UniProt 1–137 Author chain As； PDBConstruct 1–137； UniProt 1–137 Author chain At； PDBConstruct 1–137； UniProt 1–137 Author chain Au； PDBConstruct 1–137； UniProt 1–137 Author chain Ay； PDBConstruct 1–137； UniProt 1–137 Author chain Az； PDBConstruct 1–137； UniProt 1–137 Author chain B1； PDBConstruct 1–137； UniProt 1–137 Author chain B2； PDBConstruct 1–137； UniProt 1–137 Author chain B7； PDBConstruct 1–137； UniProt 1–137 Author chain B8； PDBConstruct 1–137； UniProt 1–137 Author chain B9； PDBConstruct 1–137； UniProt 1–137 Author chain BC； PDBConstruct 1–137； UniProt 1–137 Author chain BD； PDBConstruct 1–137； UniProt 1–137 Author chain BE； PDBConstruct 1–137； UniProt 1–137 Author chain BJ； PDBConstruct 1–137； UniProt 1–137 Author chain BK； PDBConstruct 1–137； UniProt 1–137 Author chain BL； PDBConstruct 1–137； UniProt 1–137 Author chain BQ； PDBConstruct 1–137； UniProt 1–137 Author chain BR； PDBConstruct 1–137； UniProt 1–137 Author chain BS； PDBConstruct 1–137； UniProt 1–137 Author chain BX； PDBConstruct 1–137； UniProt 1–137 Author chain BY； PDBConstruct 1–137； UniProt 1–137 Author chain BZ； PDBConstruct 1–137； UniProt 1–137 Author chain Be； PDBConstruct 1–137； UniProt 1–137 Author chain Bf； PDBConstruct 1–137； UniProt 1–137 Author chain Bg； PDBConstruct 1–137； UniProt 1–137 Author chain Bl； PDBConstruct 1–137； UniProt 1–137 Author chain Bm； PDBConstruct 1–137； UniProt 1–137 Author chain Bn； PDBConstruct 1–137； UniProt 1–137 Author chain Bs； PDBConstruct 1–137； UniProt 1–137 Author chain Bt； PDBConstruct 1–137； UniProt 1–137 Author chain Bu； PDBConstruct 1–137； UniProt 1–137 Author chain Bz； PDBConstruct 1–137； UniProt 1–137 Author chain C1； PDBConstruct 1–137； UniProt 1–137 Author chain C2； PDBConstruct 1–137； UniProt 1–137 Author chain CD； PDBConstruct 1–137； UniProt 1–137 Author chain CE； PDBConstruct 1–137； UniProt 1–137 Author chain CF； PDBConstruct 1–137； UniProt 1–137 Author chain CK； PDBConstruct 1–137； UniProt 1–137 Author chain CL； PDBConstruct 1–137； UniProt 1–137 Author chain CM； PDBConstruct 1–137； UniProt 1–137 Author chain CR； PDBConstruct 1–137； UniProt 1–137 Author chain CS； PDBConstruct 1–137； UniProt 1–137 Author chain CT； PDBConstruct 1–137； UniProt 1–137 Author chain CY； PDBConstruct 1–137； UniProt 1–137 Author chain CZ； PDBConstruct 1–137； UniProt 1–137 Author chain Ca； PDBConstruct 1–137； UniProt 1–137 Author chain Cf； PDBConstruct 1–137； UniProt 1–137 Author chain Cg； PDBConstruct 1–137； UniProt 1–137 Author chain Ch； PDBConstruct 1–137； UniProt 1–137 Author chain Cm； PDBConstruct 1–137； UniProt 1–137 Author chain Cn； PDBConstruct 1–137； UniProt 1–137 Author chain Co； PDBConstruct 1–137； UniProt 1–137 Author chain Ct； PDBConstruct 1–137； UniProt 1–137 Author chain Cu； PDBConstruct 1–137； UniProt 1–137 Author chain Cv； PDBConstruct 1–137； UniProt 1–137 Author chain o； PDBConstruct 1–137； UniProt 1–137 Author chain p； PDBConstruct 1–137； UniProt 1–137 Author chain q； PDBConstruct 1–137； UniProt 1–137 Author chain r； PDBConstruct 1–137； UniProt 1–137 Author chain s； PDBConstruct 1–137； UniProt 1–137 Author chain t； PDBConstruct 1–137； UniProt 1–137 Author chain u； PDBConstruct 1–137； UniProt 1–137 Author chain v； PDBConstruct 1–137； UniProt 1–137 Author chain w； PDBConstruct 1–137； UniProt 1–137 Author chain x； PDBConstruct 1–137； UniProt 1–137 Author chain y； PDBConstruct 1–137； UniProt 1–137 Author chain z； PDBConstruct 1–137； UniProt 1–137

Flagellar M-ring protein

OrganismNot specified

UniProt P15928

State in the Current Structure

Assembly Physical composition Protein state Molecular copy count Associated components Data consistency
1 Protein heterocomplex Heteromer Protein 238 Flagellar motor switch protein FliN × 102 （P26419） Flagellar motor switch protein FliM × 34 （P26418） Flagellar motor switch protein FliG × 34 （P0A1J9） Chemotaxis protein CheY × 34 （P0A2D5） Consistent with protein count

Other States of the Same Protein in the Database

Monomer

None

Homodimer

None

Homotetramer

None

Other homooligomers
6sd1 6sd2 6sd3 6sd4 6sd5 6tre 7bk0 7cg7 7d84 8fte 8ftf 8t8p

17 assemblies; showing the first 12

Heteromeric or nucleic-acid complex
7cg0 7cgo 7e80 7e81 7e82 7nvg 8umd 8umx 8uox 8upl 8vib 8vid

31 assemblies; showing the first 12

View Construct and Data Evidence
UniProt name FLIF_SALTY
Isoform —
PDB entities 2
Chains and sequence ranges Author chain A2； PDBConstruct 1–560； UniProt 1–560 Author chain A9； PDBConstruct 1–560； UniProt 1–560 Author chain B0； PDBConstruct 1–560； UniProt 1–560 Author chain B3； PDBConstruct 1–560； UniProt 1–560 Author chain BF； PDBConstruct 1–560； UniProt 1–560 Author chain BM； PDBConstruct 1–560； UniProt 1–560 Author chain BT； PDBConstruct 1–560； UniProt 1–560 Author chain Ba； PDBConstruct 1–560； UniProt 1–560 Author chain Bh； PDBConstruct 1–560； UniProt 1–560 Author chain Bo； PDBConstruct 1–560； UniProt 1–560 Author chain Bv； PDBConstruct 1–560； UniProt 1–560 Author chain C； PDBConstruct 1–560； UniProt 1–560 Author chain CG； PDBConstruct 1–560； UniProt 1–560 Author chain CN； PDBConstruct 1–560； UniProt 1–560 Author chain CU； PDBConstruct 1–560； UniProt 1–560 Author chain Cb； PDBConstruct 1–560； UniProt 1–560 Author chain Ci； PDBConstruct 1–560； UniProt 1–560 Author chain Cp； PDBConstruct 1–560； UniProt 1–560 Author chain Cw； PDBConstruct 1–560； UniProt 1–560 Author chain D； PDBConstruct 1–560； UniProt 1–560 Author chain E； PDBConstruct 1–560； UniProt 1–560 Author chain F； PDBConstruct 1–560； UniProt 1–560 Author chain G； PDBConstruct 1–560； UniProt 1–560 Author chain H； PDBConstruct 1–560； UniProt 1–560 Author chain I； PDBConstruct 1–560； UniProt 1–560 Author chain J； PDBConstruct 1–560； UniProt 1–560 Author chain K； PDBConstruct 1–560； UniProt 1–560 Author chain L； PDBConstruct 1–560； UniProt 1–560 Author chain M； PDBConstruct 1–560； UniProt 1–560 Author chain N； PDBConstruct 1–560； UniProt 1–560 Author chain O； PDBConstruct 1–560； UniProt 1–560 Author chain P； PDBConstruct 1–560； UniProt 1–560 Author chain Q； PDBConstruct 1–560； UniProt 1–560 Author chain R； PDBConstruct 1–560； UniProt 1–560

Flagellar motor switch protein FliM

OrganismNot specified

UniProt P26418

State in the Current Structure

Assembly Physical composition Protein state Molecular copy count Associated components Data consistency
1 Protein heterocomplex Heteromer Protein 238 Flagellar motor switch protein FliN × 102 （P26419） Flagellar M-ring protein × 34 （P15928） Flagellar motor switch protein FliG × 34 （P0A1J9） Chemotaxis protein CheY × 34 （P0A2D5） Consistent with protein count

Other States of the Same Protein in the Database

Monomer

None

Homodimer

None

Homotetramer

None

Other homooligomers

None

Heteromeric or nucleic-acid complex
4yxb 4yxc 8umx 8uox 8upl 8vkr 8wiw 8wo5 8woe 8xp0 8xp1 8yjt

14 assemblies; showing the first 12

View Construct and Data Evidence
UniProt name FLIM_SALTY
Isoform —
PDB entities 3
Chains and sequence ranges Author chain 7； PDBConstruct 1–334； UniProt 1–334 Author chain A0； PDBConstruct 1–334； UniProt 1–334 Author chain A3； PDBConstruct 1–334； UniProt 1–334 Author chain AL； PDBConstruct 1–334； UniProt 1–334 Author chain AR； PDBConstruct 1–334； UniProt 1–334 Author chain AX； PDBConstruct 1–334； UniProt 1–334 Author chain Ad； PDBConstruct 1–334； UniProt 1–334 Author chain Aj； PDBConstruct 1–334； UniProt 1–334 Author chain Ap； PDBConstruct 1–334； UniProt 1–334 Author chain Av； PDBConstruct 1–334； UniProt 1–334 Author chain B4； PDBConstruct 1–334； UniProt 1–334 Author chain BG； PDBConstruct 1–334； UniProt 1–334 Author chain BN； PDBConstruct 1–334； UniProt 1–334 Author chain BU； PDBConstruct 1–334； UniProt 1–334 Author chain Bb； PDBConstruct 1–334； UniProt 1–334 Author chain Bi； PDBConstruct 1–334； UniProt 1–334 Author chain Bp； PDBConstruct 1–334； UniProt 1–334 Author chain Bw； PDBConstruct 1–334； UniProt 1–334 Author chain CA； PDBConstruct 1–334； UniProt 1–334 Author chain CH； PDBConstruct 1–334； UniProt 1–334 Author chain CO； PDBConstruct 1–334； UniProt 1–334 Author chain CV； PDBConstruct 1–334； UniProt 1–334 Author chain Cc； PDBConstruct 1–334； UniProt 1–334 Author chain Cj； PDBConstruct 1–334； UniProt 1–334 Author chain Cq； PDBConstruct 1–334； UniProt 1–334 Author chain Cx； PDBConstruct 1–334； UniProt 1–334 Author chain S； PDBConstruct 1–334； UniProt 1–334 Author chain T； PDBConstruct 1–334； UniProt 1–334 Author chain U； PDBConstruct 1–334； UniProt 1–334 Author chain V； PDBConstruct 1–334； UniProt 1–334 Author chain W； PDBConstruct 1–334； UniProt 1–334 Author chain X； PDBConstruct 1–334； UniProt 1–334 Author chain Y； PDBConstruct 1–334； UniProt 1–334 Author chain g； PDBConstruct 1–334； UniProt 1–334

Flagellar motor switch protein FliG

OrganismNot specified

UniProt P0A1J9

State in the Current Structure

Assembly Physical composition Protein state Molecular copy count Associated components Data consistency
1 Protein heterocomplex Heteromer Protein 238 Flagellar motor switch protein FliN × 102 （P26419） Flagellar M-ring protein × 34 （P15928） Flagellar motor switch protein FliM × 34 （P26418） Chemotaxis protein CheY × 34 （P0A2D5） Consistent with protein count

Other States of the Same Protein in the Database

Monomer

None

Homodimer

None

Homotetramer

None

Other homooligomers

None

Heteromeric or nucleic-acid complex
8umx 8uox 8upl 8vib 8vid 8vkq 8vkr 8wiw 8wo5 8woe 8xp0 8xp1

15 assemblies; showing the first 12

View Construct and Data Evidence
UniProt name FLIG_SALTY
Isoform —
PDB entities 4
Chains and sequence ranges Author chain 3； PDBConstruct 1–331； UniProt 1–331 Author chain 8； PDBConstruct 1–331； UniProt 1–331 Author chain A4； PDBConstruct 1–331； UniProt 1–331 Author chain AM； PDBConstruct 1–331； UniProt 1–331 Author chain AS； PDBConstruct 1–331； UniProt 1–331 Author chain AY； PDBConstruct 1–331； UniProt 1–331 Author chain Ae； PDBConstruct 1–331； UniProt 1–331 Author chain Ak； PDBConstruct 1–331； UniProt 1–331 Author chain Aq； PDBConstruct 1–331； UniProt 1–331 Author chain Aw； PDBConstruct 1–331； UniProt 1–331 Author chain B5； PDBConstruct 1–331； UniProt 1–331 Author chain BA； PDBConstruct 1–331； UniProt 1–331 Author chain BH； PDBConstruct 1–331； UniProt 1–331 Author chain BO； PDBConstruct 1–331； UniProt 1–331 Author chain BV； PDBConstruct 1–331； UniProt 1–331 Author chain Bc； PDBConstruct 1–331； UniProt 1–331 Author chain Bj； PDBConstruct 1–331； UniProt 1–331 Author chain Bq； PDBConstruct 1–331； UniProt 1–331 Author chain Bx； PDBConstruct 1–331； UniProt 1–331 Author chain CB； PDBConstruct 1–331； UniProt 1–331 Author chain CI； PDBConstruct 1–331； UniProt 1–331 Author chain CP； PDBConstruct 1–331； UniProt 1–331 Author chain CW； PDBConstruct 1–331； UniProt 1–331 Author chain Cd； PDBConstruct 1–331； UniProt 1–331 Author chain Ck； PDBConstruct 1–331； UniProt 1–331 Author chain Cr； PDBConstruct 1–331； UniProt 1–331 Author chain Cy； PDBConstruct 1–331； UniProt 1–331 Author chain Z； PDBConstruct 1–331； UniProt 1–331 Author chain a； PDBConstruct 1–331； UniProt 1–331 Author chain b； PDBConstruct 1–331； UniProt 1–331 Author chain c； PDBConstruct 1–331； UniProt 1–331 Author chain d； PDBConstruct 1–331； UniProt 1–331 Author chain e； PDBConstruct 1–331； UniProt 1–331 Author chain f； PDBConstruct 1–331； UniProt 1–331

Chemotaxis protein CheY

Salmonella enterica subsp. enterica serovar Typhimurium str. LT2

UniProt P0A2D5

State in the Current Structure

Assembly Physical composition Protein state Molecular copy count Associated components Data consistency
1 Protein heterocomplex Heteromer Protein 238 Flagellar motor switch protein FliN × 102 （P26419） Flagellar M-ring protein × 34 （P15928） Flagellar motor switch protein FliM × 34 （P26418） Flagellar motor switch protein FliG × 34 （P0A1J9） Consistent with protein count

Other States of the Same Protein in the Database

Monomer
2che 2chf 2chy 2pmc 2pmc

5 assemblies

Homodimer

None

Homotetramer

None

Other homooligomers
2fka

1 assemblies

Heteromeric or nucleic-acid complex
2fka 2flk 2flk 2flw 2fmf 2fmh 2fmh 2fmh 2fmi 2fmi 2fmk 2pl9

19 assemblies; showing the first 12

View Construct and Data Evidence
UniProt name CHEY_SALTY
Isoform —
PDB entities 5
Chains and sequence ranges Author chain 4； PDBConstruct 1–129； UniProt 1–129 Author chain 9； PDBConstruct 1–129； UniProt 1–129 Author chain A5； PDBConstruct 1–129； UniProt 1–129 Author chain AN； PDBConstruct 1–129； UniProt 1–129 Author chain AT； PDBConstruct 1–129； UniProt 1–129 Author chain AZ； PDBConstruct 1–129； UniProt 1–129 Author chain Af； PDBConstruct 1–129； UniProt 1–129 Author chain Al； PDBConstruct 1–129； UniProt 1–129 Author chain Ar； PDBConstruct 1–129； UniProt 1–129 Author chain Ax； PDBConstruct 1–129； UniProt 1–129 Author chain B6； PDBConstruct 1–129； UniProt 1–129 Author chain BB； PDBConstruct 1–129； UniProt 1–129 Author chain BI； PDBConstruct 1–129； UniProt 1–129 Author chain BP； PDBConstruct 1–129； UniProt 1–129 Author chain BW； PDBConstruct 1–129； UniProt 1–129 Author chain Bd； PDBConstruct 1–129； UniProt 1–129 Author chain Bk； PDBConstruct 1–129； UniProt 1–129 Author chain Br； PDBConstruct 1–129； UniProt 1–129 Author chain By； PDBConstruct 1–129； UniProt 1–129 Author chain CC； PDBConstruct 1–129； UniProt 1–129 Author chain CJ； PDBConstruct 1–129； UniProt 1–129 Author chain CQ； PDBConstruct 1–129； UniProt 1–129 Author chain CX； PDBConstruct 1–129； UniProt 1–129 Author chain Ce； PDBConstruct 1–129； UniProt 1–129 Author chain Cl； PDBConstruct 1–129； UniProt 1–129 Author chain Cs； PDBConstruct 1–129； UniProt 1–129 Author chain Cz； PDBConstruct 1–129； UniProt 1–129 Author chain h； PDBConstruct 1–129； UniProt 1–129 Author chain i； PDBConstruct 1–129； UniProt 1–129 Author chain j； PDBConstruct 1–129； UniProt 1–129 Author chain k； PDBConstruct 1–129； UniProt 1–129 Author chain l； PDBConstruct 1–129； UniProt 1–129 Author chain m； PDBConstruct 1–129； UniProt 1–129 Author chain n； PDBConstruct 1–129； UniProt 1–129

The page prioritizes protein identity, the current assembly, associated components, oligomeric state and cross-PDB links. Chain mapping and sequence ranges are retained as data evidence. Internal IDs, import timestamps and assembly operation expressions are maintenance fields and are not shown here.

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2. Structure Basics 2. Structure Basics

Entry ID entry_id8wiw
Deposition date deposition_date2023-09-25
Structure title titleCryo-EM structure of the flagellar C ring in the CW state
Keywords keywordsFlagellum, Flagellar motor, C ring, Switch complex, MOTOR PROTEIN; MOTOR PROTEIN
Experimental Method methodELECTRON MICROSCOPY
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3. Official assembly/model SAXS Official SAXS Profiles

This page reads only the latest assembly calculations. Every curve maps to an explicit PDB entry, official biological assembly and coordinate model.

8wiw__assembly_1__model_1

Assembly 1 · Model 1 · CRYSOL 4.1.3-1-20251215 (887e7ef)

Download this curve (.dat)

8wiw__assembly_1__model_1 | I(q)

10-2 10-1 105 106 107 108 109 1010 1011 q (1/Angstrom) I(q)
100 plotted points; both axes use logarithmic scales.

8wiw__assembly_1__model_1 | P(r) · Pending

The new assembly/model P(r) has not been calculated yet This placeholder does not display legacy data r (Angstrom) P(r)
P(r) will be calculated and displayed separately for the same assembly/model.
Rg（Guinier）0.00 Å
Rg (electron density)210.60 Å
Total Rg210.70 Å
Atom count275366
Residues34952
Excluded volume4948700 ų
Maximum q0.500 Å⁻¹
Assembly Model Structure unit Oligomeric description Status CRYSOL Actions
1 1 8wiw__assembly_1__model_1 238-meric （238） Success 4.1.3-1-20251215 (887e7ef) View Download
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4. Crystallography and Experiment 4. Crystallography & Experiment

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5. Entities and Polymers Entities & Polymers (5)

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7. Citations (1)