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Protein Structures and Oligomeric States

Enter a protein name, UniProt accession or PDB ID. Name searches ask you to confirm the protein identity before related structures are queried.

Current Protein Identity：P02930 New Search
20PDB entries
20Biological assembly
60chain/assembly records
Main Difference Dimensions in This Set
Different construct Different mutation/modification Different assembly state Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics

Difference tags compare only the current result set; every original PDB and assembly record remains separate.

Related-Structure Differences

Each row represents one biological assembly in one PDB entry; multiple monomers of the same protein are listed separately.

PDB Entry Assembly / Oligomeric State Construct Mutations and Modifications Ligands, Ions and Non-polymers Experimental Method Experimental Conditions Structure Quality
1EK9 2.1A X-RAY STRUCTURE OF TOLC: AN INTEGRAL OUTER MEMBRANE PROTEIN AND EFFLUX PUMP COMPONENT FROM ESCHERICHIA COLI Deposited 2000-03-07 Assembly 1 Protein homooligomer Homooligomer；Protein × 3 PDB declaration: trimeric（3） Consistent with protein count
Chain A 25–452（428 aa）
Chain B 25–452（428 aa）
Chain C 25–452（428 aa）
Non-standard monomer：Yes (specific site not provided by mmCIF) Non-standard monomer：Yes (specific site not provided by mmCIF) Non-standard monomer：Yes (specific site not provided by mmCIF) No recorded non-water small molecule X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 7.4；298 K；PEG 2000 MME, PEG 400, Sodium Chloride, Magnesium Chloride, dodecyl glucopyrsanoside, hexyl glucopyranoside, heptyl gluocopyranoside, octyl glucopyranoside, 1,2,3-heptanetriol, Tris, pH 7.4, VAPOR DIFFUSION, HANGING DROP, temperature 298K
Resolution 2.10 Å R-free 0.257
1TQQ Structure of TolC in complex with hexamminecobalt Deposited 2004-06-18 Assembly 1 Protein homooligomer Homooligomer；Protein × 3 PDB declaration: trimeric（3） Consistent with protein count
Chain A 25–495（471 aa）
Chain B 25–495（471 aa）
Chain C 25–495（471 aa）
Not recorded NCO COBALT HEXAMMINE(III) × 1 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 7.4；291 K；0.6% detergent mixture of n-dodecyl-beta-D glucopyranoside, n-hexyl-beta-D glucopyranoside, n-heptyl-beta-D glucopyranoside and n-octyl-beta-D glucopyranoside, 1.5% 1,2,3-heptanetriol, 7% polyethylene glycol 2000 monomethyl ether, 10% polyethylene glycol 400, 10mM NaCl, 20mM MgCl2, 20mM Tris, pH 7.4, VAPOR DIFFUSION, HANGING DROP, temperature 291K
Resolution 2.75 Å R-free 0.305
2VDD Crystal Structure of the Open State of TolC Outer Membrane Component of Mutlidrug Efflux Pumps Deposited 2007-10-04 Assembly 1 Protein homooligomer Homooligomer；Protein × 3 PDB declaration: trimeric（3） Consistent with protein count
Chain A 1–450（450 aa） Fragment：RESIDUES 1-450
Chain B 1–450（450 aa） Fragment：RESIDUES 1-450
Chain C 1–450（450 aa） Fragment：RESIDUES 1-450
Mutation：YES Mutation：YES Mutation：YES CL CHLORIDE ION × 3 K POTASSIUM ION × 3 X-RAY DIFFRACTION
X-ray crystallization conditions pH 7.5；PROTEIN WAS CRYSTALLISED FROM 0.1M HEPES 7.5, 5% ISOPROPANOL, 10% PEG4000
Resolution 3.30 Å R-free 0.295
2VDE Crystal Structure of the Open State of TolC Outer Membrane Component of Mutlidrug Efflux Pumps Deposited 2007-10-04 Assembly 1 Protein homooligomer Homooligomer；Protein × 3 PDB declaration: trimeric（3） Consistent with protein count
Chain A 1–450（450 aa） Fragment：RESIDUES 1-450
Chain B 1–450（450 aa） Fragment：RESIDUES 1-450
Chain C 1–450（450 aa） Fragment：RESIDUES 1-450
Mutation：YES Mutation：YES Mutation：YES CL CHLORIDE ION × 4 X-RAY DIFFRACTION
X-ray crystallization conditions pH 10.5；PROTEIN WAS CRYSTALLIZED FROM 0.1M CAPS PH10.5, 30% PEG400
Resolution 3.20 Å R-free 0.315
2WMZ Structure of a mutated TolC Deposited 2009-07-03 Assembly 1 Protein homooligomer Homooligomer；Protein × 3 PDB declaration: trimeric（3） Consistent with protein count
Chain A 23–450（428 aa） Fragment：MATURE PROTEIN WITH 43 C-TERMINAL RESIDUES REMOVED, RESIDUES 23-450
Chain B 23–450（428 aa） Fragment：MATURE PROTEIN WITH 43 C-TERMINAL RESIDUES REMOVED, RESIDUES 23-450
Chain C 23–450（428 aa） Fragment：MATURE PROTEIN WITH 43 C-TERMINAL RESIDUES REMOVED, RESIDUES 23-450
Mutation：YES Mutation：YES Mutation：YES CL CHLORIDE ION × 3 PGE TRIETHYLENE GLYCOL × 5 NA SODIUM ION × 1 X-RAY DIFFRACTION
X-ray crystallization conditions pH 7；50 MM TRIS PH 8.2, 50 MM NACL, 14% PEG2000, 0.075% N-DODECYL-BETA-D-MALTOSIDE, 0.3% N-OCTYL BETA-D-GLUCOPYRANOSIDE
Resolution 2.90 Å R-free 0.301
2XMN High resolution snapshots of defined TolC open states present an iris- like movement of periplasmic entrance helices Deposited 2010-07-28 Assembly 1 Protein homooligomer Homooligomer；Protein × 3 PDB declaration: trimeric（3） Consistent with protein count
Chain A 23–450（428 aa） Fragment：RESIDUES 23-450
Chain B 23–450（428 aa） Fragment：RESIDUES 23-450
Chain C 23–450（428 aa） Fragment：RESIDUES 23-450
Mutation：YES Mutation：YES Mutation：YES CL CHLORIDE ION × 3 LMT DODECYL-BETA-D-MALTOSIDE × 1 X-RAY DIFFRACTION
X-ray crystallization conditions pH 7.4；PH 7.4
Resolution 2.85 Å R-free 0.309
5NG5 multi-drug efflux; membrane transport; RND superfamily; Drug resistance Deposited 2017-03-16 Assembly 1 Protein heterocomplex Heteromer；Protein × 15 PDB declaration: pentadecameric（15） Consistent with protein count
Chain C 1–493（493 aa）
Chain F 1–493（493 aa）
Chain I 1–493（493 aa）
Not recorded 5QF 6-[2-(3,4-dimethoxyphenyl)ethylsulfanyl]-8-[4-(2-methoxyethyl)piperazin-1-yl]-3,3-dimethyl-1,4-dihydropyrano[3,4-c]pyridine-5-carbonitrile × 3 ELECTRON MICROSCOPY
cryo-EM buffer pH 8
cryo-EM vitrification conditions Cryogen ETHANE；a 3ul aliquot at a concentration of 2 mg per ml was applied onto glow-discharged holey carbon grid (Quantifoil Au R1.21.3, 300 mesh)
Resolution 6.50 Å
5NIK Structure of the MacAB-TolC ABC-type tripartite multidrug efflux pump Deposited 2017-03-24 Assembly 1 Protein heterocomplex Heteromer；Protein × 11 PDB declaration: undecameric（11） Consistent with protein count
Chain A 23–493（471 aa）
Chain B 23–493（471 aa）
Chain C 23–493（471 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 8
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.30 Å
5NIL Structure of the MacAB-TolC ABC-type tripartite multidrug efflux pump-MacB section Deposited 2017-03-24 Assembly 1 Protein heterocomplex Heteromer；Protein × 11 PDB declaration: undecameric（11） Consistent with protein count
Chain A 23–493（471 aa）
Chain B 23–493（471 aa）
Chain C 23–493（471 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 8
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 5.30 Å
5O66 Asymmetric AcrABZ-TolC Deposited 2017-06-05 Assembly 1 Protein heterocomplex Heteromer；Protein × 15 PDB declaration: pentadecameric（15） Consistent with protein count
Chain A 1–493（493 aa）
Chain B 1–493（493 aa）
Chain C 1–493（493 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 7.6
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 5.90 Å
5V5S multi-drug efflux; membrane transport; RND superfamily; Drug resistance Deposited 2017-03-15 Assembly 1 Protein heterocomplex Heteromer；Protein × 12 PDB declaration: dodecameric（12） Consistent with protein count
Chain A 23–464（442 aa）
Chain B 23–464（442 aa）
Chain C 23–464（442 aa）
Non-standard monomer：Yes (specific site not provided by mmCIF) Non-standard monomer：Yes (specific site not provided by mmCIF) Non-standard monomer：Yes (specific site not provided by mmCIF) No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 8
cryo-EM vitrification conditions Cryogen ETHANE；a 3ul aliquot at a concentration of 2 mg per ml was applied onto glow-discharged holey carbon grid (Quantifoil Au R1.21.3, 300 mesh)
Resolution 6.50 Å
6WXH Colicin E1 fragment in nanodisc-embedded TolC Deposited 2020-05-10 Assembly 1 Protein heterocomplex Heteromer；Protein × 4 PDB declaration: tetrameric（4） Consistent with protein count
Chain A 1–493（493 aa）
Chain B 1–493（493 aa）
Chain C 1–493（493 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 8
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.09 Å
6WXI Colicin E1 fragment in nanodisc-embedded TolC Deposited 2020-05-10 Assembly 1 Protein homooligomer Homooligomer；Protein × 3 PDB declaration: trimeric（3） Consistent with protein count
Chain A 1–493（493 aa）
Chain B 1–493（493 aa）
Chain C 1–493（493 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 8
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.84 Å
8ZAL EmrAB-TolC MFS-type tripartite multidrug efflux pump EA Deposited 2024-04-25 Assembly 1 Protein heterocomplex Heteromer；Protein × 10 PDB declaration: decameric（10） Consistent with protein count
Chain G 23–450（428 aa）
Chain H 23–450（428 aa）
Chain I 23–450（428 aa）
Mutation：V169L Mutation：V169L Mutation：V169L No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.11 Å
8ZAR EmrAB-TolC MFS-type tripartite multidrug efflux pump FA Deposited 2024-04-25 Assembly 1 Protein heterocomplex Heteromer；Protein × 10 PDB declaration: decameric（10） Consistent with protein count
Chain G 1–493（493 aa）
Chain H 1–493（493 aa）
Chain I 1–493（493 aa）
Mutation：V191L Mutation：V191L Mutation：V191L No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.59 Å
9QGY Structure of the YbjP lipoprotein bound to the MacAB-TolC tripartite efflux pump Deposited 2025-03-14 Assembly 1 Protein heterocomplex Heteromer；Protein × 14 PDB declaration: 14-meric（14） Consistent with protein count
Chain A 23–493（471 aa）
Chain B 23–493（471 aa）
Chain C 23–493（471 aa）
Not recorded CL CHLORIDE ION × 3 Z41 (2S)-3-hydroxypropane-1,2-diyl dihexadecanoate × 3 ELECTRON MICROSCOPY
cryo-EM buffer pH 8
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.48 Å
9TG4 Structure of the YbjP lipoprotein bound to the AcrABZ-TolC efflux pump Deposited 2025-11-28 Assembly 1 Protein heterocomplex Heteromer；Protein × 18 PDB declaration: 18-meric（18） Consistent with protein count
Chain A 23–493（471 aa）
Chain B 23–493（471 aa）
Chain C 23–493（471 aa）
Not recorded CL CHLORIDE ION × 3 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.17 Å
9V52 Structure of TolC and YbjP closed state complex Deposited 2025-05-25 Assembly 1 Protein heterocomplex Heteromer；Protein × 6 PDB declaration: hexameric（6） Consistent with protein count
Chain C1 1–493（493 aa）
Chain C2 1–493（493 aa）
Chain C3 1–493（493 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 8
cryo-EM vitrification conditions Cryogen NITROGEN
Resolution 3.56 Å
9V53 Structure of TolC, YbjP, and AcrABZ complex Deposited 2025-05-25 Assembly 1 Protein heterocomplex Heteromer；Protein × 18 PDB declaration: octadecameric（18） Consistent with protein count
Chain C1 1–493（493 aa）
Chain C2 1–493（493 aa）
Chain C3 1–493（493 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 8
cryo-EM vitrification conditions Cryogen NITROGEN
Resolution 3.39 Å
9V55 Structure of TolC, YbjP, and AcrA complex Deposited 2025-05-25 Assembly 1 Protein heterocomplex Heteromer；Protein × 12 PDB declaration: dodecameric（12） Consistent with protein count
Chain C1 1–493（493 aa）
Chain C2 1–493（493 aa）
Chain C3 1–493（493 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 8
cryo-EM vitrification conditions Cryogen NITROGEN
Resolution 3.26 Å

This page presents structural evidence recorded in PDB/mmCIF.“No recorded non-water small molecule” does not prove that the experimental sample was ligand-free; experimental conditions belong to the PDB experiment, while ligands and copy counts are shown for each biological assembly.