Beta-lactamase
Acinetobacter baumannii
State in the Current Structure
| Assembly | Oligomeric State | Construct | Mutations and Modifications | Ligands, Ions and Associated Components | Method and Experimental Conditions | Structure Quality |
|---|---|---|---|---|---|---|
| 1 | Protein monomer Monomer Protein × 1 PDB declaration: monomeric(1) Consistent with protein copy count | Chain A; UniProt 31–273 | Not recorded | EDO 1,2-ETHANEDIOL × 1 MER (4R,5S)-3-{[(3S,5S)-5-(dimethylcarbamoyl)pyrrolidin-3-yl]sulfanyl}-5-[(2S,3R)-3-hydroxy-1-oxobutan-2-yl]-4-methyl-4,5-d ihydro-1H-pyrrole-2-carboxylic acid × 1 | X-RAY DIFFRACTION X-ray crystallization conditions:VAPOR DIFFUSION, SITTING DROP;pH 4.1;277 K;0.06 M citric acid/0.04 M bis-tris propane, 16 % PEG3350, pH 4.1, VAPOR DIFFUSION, SITTING DROP, temperature 277K | Resolution 2.14 Å R-free 0.254 |
| 2 | Protein monomer Monomer Protein × 1 PDB declaration: monomeric(1) Consistent with protein copy count | Chain B; UniProt 31–273 | Not recorded | MER (4R,5S)-3-{[(3S,5S)-5-(dimethylcarbamoyl)pyrrolidin-3-yl]sulfanyl}-5-[(2S,3R)-3-hydroxy-1-oxobutan-2-yl]-4-methyl-4,5-d ihydro-1H-pyrrole-2-carboxylic acid × 1 | X-RAY DIFFRACTION X-ray crystallization conditions:VAPOR DIFFUSION, SITTING DROP;pH 4.1;277 K;0.06 M citric acid/0.04 M bis-tris propane, 16 % PEG3350, pH 4.1, VAPOR DIFFUSION, SITTING DROP, temperature 277K | Resolution 2.14 Å R-free 0.254 |
Other States of the Same Protein in the Database
Each row is a biological assembly of the same UniProt protein in another PDB entry. The “Difference from current entry” column identifies evidence-level differences; no tag means the currently parsed fields agree.
| Other PDB | Difference from Current Entry 4JF4 | Assembly / Oligomeric State | Construct | Mutations and Modifications | Ligands, Ions and Non-polymers | Method and Experimental Conditions | Structure Quality |
|---|---|---|---|---|---|---|---|
| 4JF5 Structure of OXA-23 at pH 4.1 Deposited 2013-02-27 | Different ligand/ion Different structure-quality metrics | Assembly 1 Protein monomer Monomer;Protein × 1 PDB declaration: monomeric |
Chain A
31–273(243 aa)
|
Not recorded | FLC CITRATE ANION × 1 EDO 1,2-ETHANEDIOL × 1 |
X-RAY DIFFRACTION
X-ray crystallization conditions
VAPOR DIFFUSION, SITTING DROP;pH 4.1;277 K;0.06 M citric acid/0.04 M bis-tris propane, 16 % PEG3350, pH 4.1, VAPOR DIFFUSION, SITTING DROP, temperature 277K
|
Resolution 1.15 Å R-free 0.162 |
| 4JF6 Structure of OXA-23 at pH 7.0 Deposited 2013-02-27 | Different mutation/modification Different ligand/ion Different experimental conditions Different structure-quality metrics | Assembly 1 Protein monomer Monomer;Protein × 1 PDB declaration: monomeric |
Chain A
31–273(243 aa)
|
Non-standard monomer:Yes (specific site not provided by mmCIF) | K POTASSIUM ION × 1 CL CHLORIDE ION × 4 PEG DI(HYDROXYETHYL)ETHER × 1 |
X-RAY DIFFRACTION
X-ray crystallization conditions
VAPOR DIFFUSION, SITTING DROP;pH 7;277 K;0.2 M succinic acid, 20% PEG3350, pH 7.0, VAPOR DIFFUSION, SITTING DROP, temperature 277K
|
Resolution 2.50 Å R-free 0.285 |
| 4K0W X-ray crystal structure of OXA-23 A220 duplication clinical variant Deposited 2013-04-04 | Different construct Different mutation/modification Different ligand/ion Different experimental conditions Different structure-quality metrics | Assembly 1 Protein monomer Monomer;Protein × 1 PDB declaration: monomeric |
Chain A
31–273(243 aa)
Fragment:unp residues 31-273
|
Mutation:A220 insertion | CIT CITRIC ACID × 1 EDO 1,2-ETHANEDIOL × 4 BCT BICARBONATE ION × 4 NA SODIUM ION × 5 |
X-RAY DIFFRACTION
X-ray crystallization conditions
VAPOR DIFFUSION, HANGING DROP;pH 4.2;296 K;0.2M sodium chloride, 0.1M phosphate, 0.1M citrate
20% w/v PEG 8000 , pH 4.2, VAPOR DIFFUSION, HANGING DROP, temperature 296K
|
Resolution 1.20 Å R-free 0.202 |
| 4K0X X-ray Crystal Structure of OXA-23 from Acinetobacter baumannii Deposited 2013-04-04 | Different construct Different mutation/modification Different ligand/ion Different experimental conditions Different structure-quality metrics | Assembly 1 Protein monomer Monomer;Protein × 1 PDB declaration: monomeric |
Chain A
31–273(243 aa)
Fragment:UNP residues 31-273
|
Non-standard monomer:Yes (specific site not provided by mmCIF) | BCT BICARBONATE ION × 2 |
X-RAY DIFFRACTION
X-ray crystallization conditions
VAPOR DIFFUSION, HANGING DROP;296 K;5% w/v PGA-LM, 30% v/v PEG 550MME,0.1M Sodium acetate, OXA-23 in 50 mM sodium phosphate, VAPOR DIFFUSION, HANGING DROP, temperature 296K
|
Resolution 1.61 Å R-free 0.192 |
| 6N6T OXA-23 mutant F110A/M221A low pH form Deposited 2018-11-27 | Different construct Different mutation/modification Different ligand/ion Different experimental conditions Different structure-quality metrics | Assembly 1 Protein monomer Monomer;Protein × 1 PDB declaration: monomeric |
Chain A
31–273(243 aa)
Fragment:UNP residues 31-273
|
Mutation:F110A/M221A | FLC CITRATE ANION × 1 |
X-RAY DIFFRACTION
X-ray crystallization conditions
VAPOR DIFFUSION, SITTING DROP;pH 4.1;293 K;0.06 M citric acid, 0.04 M bis-Tris propane, pH 4.1, 16% PEG3350
|
Resolution 1.25 Å R-free 0.180 |
| 6N6U OXA-23 mutant F110A/M221A low pH form imipenem complex Deposited 2018-11-27 | Different construct Different mutation/modification Different ligand/ion Different experimental conditions Different structure-quality metrics | Assembly 1 Protein monomer Monomer;Protein × 1 PDB declaration: monomeric |
Chain A
32–273(242 aa)
Fragment:UNP residues 32-273
|
Mutation:F110A/M221A | ID1 Imipenem × 1 |
X-RAY DIFFRACTION
X-ray crystallization conditions
VAPOR DIFFUSION, SITTING DROP;pH 4.1;293 K;0.06 M citric acid, 0.04 M bis-Tris propane, pH 4.1, 16% PEG3350
|
Resolution 1.55 Å R-free 0.196 |
| 6N6V OXA-23 mutant F110A/M221A low pH form meropenem complex Deposited 2018-11-27 | Different construct Different mutation/modification Different ligand/ion Different experimental conditions Different structure-quality metrics | Assembly 1 Protein monomer Monomer;Protein × 1 PDB declaration: monomeric |
Chain A
32–273(242 aa)
Fragment:UNP residues 32-273
|
Mutation:F110A/M221A | KE1 meropenem, bound form × 1 |
X-RAY DIFFRACTION
X-ray crystallization conditions
VAPOR DIFFUSION, SITTING DROP;pH 4.1;293 K;0.06 M citric acid, 0.04 M bis-Tris propane, pH 4.1, 16% PEG3350
|
Resolution 1.55 Å R-free 0.192 |
| 6N6W OXA-23 mutant F110A/M221A neutral pH form Deposited 2018-11-27 | Different construct Different mutation/modification Different ligand/ion Different experimental conditions Different structure-quality metrics | Assembly 1 Protein monomer Monomer;Protein × 1 PDB declaration: monomeric |
Chain A
36–273(238 aa)
Fragment:UNP residues 36-273
|
Mutation:F110A/M221A 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, SITTING DROP;pH 7;293 K;0.2 M succinic acid, pH 7.0, 20% PEG3350
|
Resolution 3.25 Å R-free 0.290 |
| 6N6X OXA-23 mutant F110A/M221A neutral pH form imipenem complex Deposited 2018-11-27 | Different construct Different mutation/modification Different ligand/ion Different experimental conditions Different structure-quality metrics | Assembly 1 Protein monomer Monomer;Protein × 1 PDB declaration: monomeric |
Chain A
35–273(239 aa)
Fragment:UNP residues 35-273
|
Mutation:F110A/M221A Non-standard monomer:Yes (specific site not provided by mmCIF) | ID1 Imipenem × 1 SO4 SULFATE ION × 1 |
X-RAY DIFFRACTION
X-ray crystallization conditions
VAPOR DIFFUSION, SITTING DROP;pH 7;293 K;0.2 M succinic acid, pH 7.0, 20% PEG3350
|
Resolution 3.10 Å R-free 0.216 |
| 6N6Y OXA-23 mutant F110A/M221A neutral pH form meropenem complex Deposited 2018-11-27 | Different construct Different mutation/modification Different ligand/ion Different experimental conditions Different structure-quality metrics | Assembly 1 Protein monomer Monomer;Protein × 1 PDB declaration: monomeric |
Chain A
35–273(239 aa)
Fragment:UNP residues 35-273
|
Mutation:F110A/M221A Non-standard monomer:Yes (specific site not provided by mmCIF) | KE1 meropenem, bound form × 1 |
X-RAY DIFFRACTION
X-ray crystallization conditions
VAPOR DIFFUSION, SITTING DROP;pH 7;293 K;0.2 M succinic acid, pH 7.0, 20% PEG3350
|
Resolution 3.50 Å R-free 0.300 |
| 9NSW apo-OXA-23, pH 7.5 Deposited 2025-03-17 | Different construct Different mutation/modification Different ligand/ion Different experimental conditions Different structure-quality metrics | Assembly 1 Protein monomer Monomer;Protein × 1 PDB declaration: monomeric |
Chain A
1–273(273 aa)
|
Non-standard monomer:Yes (specific site not provided by mmCIF) | SO4 SULFATE ION × 2 MPD (4S)-2-METHYL-2,4-PENTANEDIOL × 1 |
X-RAY DIFFRACTION
X-ray crystallization conditions
VAPOR DIFFUSION, SITTING DROP;277 K;0.2 M lithium sulfate, 0.1 M HEPES, pH 7.5, 25% PEG3350
|
Resolution 1.40 Å R-free 0.201 |
| 9NSX OXA-23-NA-1-157, 3 minute soak Deposited 2025-03-17 | Different construct Different mutation/modification Different ligand/ion Different experimental conditions Different structure-quality metrics | Assembly 1 Protein monomer Monomer;Protein × 1 PDB declaration: monomeric |
Chain A
1–273(273 aa)
|
Non-standard monomer:Yes (specific site not provided by mmCIF) | Y33 (5R)-3-{[(3S,5S)-5-(dimethylcarbamoyl)pyrrolidin-3-yl]sulfanyl}-5-[(2S,3R)-3-hydroxy-1-oxobutan-2-yl]-5-methyl-4,5-dihydro-1H-pyrrole-2-carboxylic acid × 1 SO4 SULFATE ION × 2 |
X-RAY DIFFRACTION
X-ray crystallization conditions
VAPOR DIFFUSION, SITTING DROP;277 K;0.2 M lithium sulfate, 0.1 M HEPES, pH 7.5, 25% PEG3350
|
Resolution 1.57 Å R-free 0.205 |
| 9NSY OXA-23-NA-1-157, 4 minute soak Deposited 2025-03-17 | Different construct Different mutation/modification Different ligand/ion Different experimental conditions Different structure-quality metrics | Assembly 1 Protein monomer Monomer;Protein × 1 PDB declaration: monomeric |
Chain A
1–273(273 aa)
|
Non-standard monomer:Yes (specific site not provided by mmCIF) | Y33 (5R)-3-{[(3S,5S)-5-(dimethylcarbamoyl)pyrrolidin-3-yl]sulfanyl}-5-[(2S,3R)-3-hydroxy-1-oxobutan-2-yl]-5-methyl-4,5-dihydro-1H-pyrrole-2-carboxylic acid × 1 SO4 SULFATE ION × 1 |
X-RAY DIFFRACTION
X-ray crystallization conditions
VAPOR DIFFUSION, SITTING DROP;277 K;0.2 M lithium sulfate, 0.1 M HEPES, pH 7.5, 25% PEG3350
|
Resolution 1.70 Å R-free 0.229 |
| 9NSZ OXA-23-NA-1-157, 6 minute soak Deposited 2025-03-17 | Different construct Different mutation/modification Different ligand/ion Different experimental conditions Different structure-quality metrics | Assembly 1 Protein monomer Monomer;Protein × 1 PDB declaration: monomeric |
Chain A
1–273(273 aa)
|
Non-standard monomer:Yes (specific site not provided by mmCIF) | Y33 (5R)-3-{[(3S,5S)-5-(dimethylcarbamoyl)pyrrolidin-3-yl]sulfanyl}-5-[(2S,3R)-3-hydroxy-1-oxobutan-2-yl]-5-methyl-4,5-dihydro-1H-pyrrole-2-carboxylic acid × 1 SO4 SULFATE ION × 1 EDO 1,2-ETHANEDIOL × 2 |
X-RAY DIFFRACTION
X-ray crystallization conditions
VAPOR DIFFUSION, SITTING DROP;277 K;0.2 M lithium sulfate, 0.1 M HEPES, pH 7.5, 25% PEG3350
|
Resolution 1.80 Å R-free 0.200 |
| 9NT0 OXA-23-meropenem, pH 7.5 Deposited 2025-03-17 | Different construct Different mutation/modification Different ligand/ion Different experimental conditions Different structure-quality metrics | Assembly 1 Protein monomer Monomer;Protein × 1 PDB declaration: monomeric |
Chain A
1–273(273 aa)
|
Non-standard monomer:Yes (specific site not provided by mmCIF) | MER (4R,5S)-3-{[(3S,5S)-5-(dimethylcarbamoyl)pyrrolidin-3-yl]sulfanyl}-5-[(2S,3R)-3-hydroxy-1-oxobutan-2-yl]-4-methyl-4,5-d ihydro-1H-pyrrole-2-carboxylic acid × 1 SO4 SULFATE ION × 1 |
X-RAY DIFFRACTION
X-ray crystallization conditions
VAPOR DIFFUSION, SITTING DROP;277 K;0.2 M lithium sulfate, 0.1 M HEPES, pH 7.5, 25% PEG3350
|
Resolution 1.60 Å R-free 0.202 |
| 9ZOP OXA-23-JDB/PQ-1-219, 3 min soak Deposited 2025-12-16 | Different construct Different mutation/modification Different ligand/ion Different experimental conditions Different structure-quality metrics | Assembly 1 Protein monomer Monomer;Protein × 1 PDB declaration: monomeric |
Chain A
1–273(273 aa)
|
Non-standard monomer:Yes (specific site not provided by mmCIF) | MPD (4S)-2-METHYL-2,4-PENTANEDIOL × 1 SO4 SULFATE ION × 2 |
X-RAY DIFFRACTION
X-ray crystallization conditions
VAPOR DIFFUSION, SITTING DROP;277 K;0.2 M lithium sulfate, 0.1 M HEPES, pH 7.5, 25% PEG3350
|
Resolution 1.90 Å R-free 0.252 |
| 9ZOQ OXA-23-JDB/PQ-1-219, 5 min soak Deposited 2025-12-16 | Different construct Different mutation/modification Different ligand/ion Different experimental conditions Different structure-quality metrics | Assembly 1 Protein monomer Monomer;Protein × 1 PDB declaration: monomeric |
Chain A
1–273(273 aa)
|
Non-standard monomer:Yes (specific site not provided by mmCIF) | MPD (4S)-2-METHYL-2,4-PENTANEDIOL × 2 SO4 SULFATE ION × 2 |
X-RAY DIFFRACTION
X-ray crystallization conditions
VAPOR DIFFUSION, SITTING DROP;277 K;0.2 M lithium sulfate, 0.1 M HEPES, pH 7.5, 25% PEG3350
|
Resolution 1.65 Å R-free 0.234 |
| 9ZOR OXA-23-JDB/PQ-1-219, 10 min complex Deposited 2025-12-16 | Different construct Different mutation/modification Different ligand/ion Different experimental conditions Different structure-quality metrics | Assembly 1 Protein monomer Monomer;Protein × 1 PDB declaration: monomeric |
Chain A
1–273(273 aa)
|
Non-standard monomer:Yes (specific site not provided by mmCIF) | A1C3I (2S)-2-[(1S,2R)-1-carboxy-2-hydroxypropyl]-4-{[(3S)-2,3-dihydroazet-3-yl]sulfanyl}-2-methyl-2H-pyrrole-5-carboxylic acid × 1 SO4 SULFATE ION × 2 MPD (4S)-2-METHYL-2,4-PENTANEDIOL × 1 |
X-RAY DIFFRACTION
X-ray crystallization conditions
VAPOR DIFFUSION, SITTING DROP;277 K;0.2 M lithium sulfate, 0.1 M HEPES, pH 7.5, 25% PEG3350
|
Resolution 1.65 Å R-free 0.200 |
| 9ZOS OXA-23-JDB/PQ-1-219, 20 min complex Deposited 2025-12-16 | Different construct Different ligand/ion Different experimental conditions Different structure-quality metrics | Assembly 1 Protein monomer Monomer;Protein × 1 PDB declaration: monomeric |
Chain A
1–273(273 aa)
|
Not recorded | A1C3I (2S)-2-[(1S,2R)-1-carboxy-2-hydroxypropyl]-4-{[(3S)-2,3-dihydroazet-3-yl]sulfanyl}-2-methyl-2H-pyrrole-5-carboxylic acid × 1 SO4 SULFATE ION × 3 MPD (4S)-2-METHYL-2,4-PENTANEDIOL × 1 |
X-RAY DIFFRACTION
X-ray crystallization conditions
VAPOR DIFFUSION, SITTING DROP;277 K;0.2 M lithium sulfate, 0.1 M HEPES, pH 7.5, 25% PEG3350
|
Resolution 1.60 Å R-free 0.229 |
| 9ZOT OXA-23-JDB/PQ-1-219, 30 min complex Deposited 2025-12-16 | Different construct Different ligand/ion Different experimental conditions Different structure-quality metrics | Assembly 1 Protein monomer Monomer;Protein × 1 PDB declaration: monomeric |
Chain A
1–273(273 aa)
|
Not recorded | MPD (4S)-2-METHYL-2,4-PENTANEDIOL × 1 A1C3I (2S)-2-[(1S,2R)-1-carboxy-2-hydroxypropyl]-4-{[(3S)-2,3-dihydroazet-3-yl]sulfanyl}-2-methyl-2H-pyrrole-5-carboxylic acid × 1 |
X-RAY DIFFRACTION
X-ray crystallization conditions
VAPOR DIFFUSION, SITTING DROP;277 K;0.2 M lithium sulfate, 0.1 M HEPES, pH 7.5, 25% PEG3350
|
Resolution 1.75 Å R-free 0.198 |
| 9ZOU OXA-23-JDB/PQ-1-219, 40 min complex Deposited 2025-12-16 | Different construct Different ligand/ion Different experimental conditions Different structure-quality metrics | Assembly 1 Protein monomer Monomer;Protein × 1 PDB declaration: monomeric |
Chain A
1–273(273 aa)
|
Not recorded | A1C3I (2S)-2-[(1S,2R)-1-carboxy-2-hydroxypropyl]-4-{[(3S)-2,3-dihydroazet-3-yl]sulfanyl}-2-methyl-2H-pyrrole-5-carboxylic acid × 1 MPD (4S)-2-METHYL-2,4-PENTANEDIOL × 2 |
X-RAY DIFFRACTION
X-ray crystallization conditions
VAPOR DIFFUSION, SITTING DROP;277 K;0.2 M lithium sulfate, 0.1 M HEPES, pH 7.5, 25% PEG3350
|
Resolution 1.50 Å R-free 0.207 |
| 9ZOV OXA-23-JDB/PQ-1-219, 60 min complex Deposited 2025-12-16 | Different construct Different ligand/ion Different experimental conditions Different structure-quality metrics | Assembly 1 Protein monomer Monomer;Protein × 1 PDB declaration: monomeric |
Chain A
1–273(273 aa)
|
Not recorded | CO2 CARBON DIOXIDE × 1 A1C3I (2S)-2-[(1S,2R)-1-carboxy-2-hydroxypropyl]-4-{[(3S)-2,3-dihydroazet-3-yl]sulfanyl}-2-methyl-2H-pyrrole-5-carboxylic acid × 1 MPD (4S)-2-METHYL-2,4-PENTANEDIOL × 2 |
X-RAY DIFFRACTION
X-ray crystallization conditions
VAPOR DIFFUSION, SITTING DROP;277 K;0.2 M lithium sulfate, 0.1 M HEPES, pH 7.5, 25% PEG3350
|
Resolution 1.50 Å R-free 0.227 |
| 9ZOW OXA-23-JDB/PQ-1-219, 90 min complex Deposited 2025-12-16 | Different construct Different ligand/ion Different experimental conditions Different structure-quality metrics | Assembly 1 Protein monomer Monomer;Protein × 1 PDB declaration: monomeric |
Chain A
1–273(273 aa)
|
Not recorded | CO2 CARBON DIOXIDE × 1 A1C3I (2S)-2-[(1S,2R)-1-carboxy-2-hydroxypropyl]-4-{[(3S)-2,3-dihydroazet-3-yl]sulfanyl}-2-methyl-2H-pyrrole-5-carboxylic acid × 1 MPD (4S)-2-METHYL-2,4-PENTANEDIOL × 2 |
X-RAY DIFFRACTION
X-ray crystallization conditions
VAPOR DIFFUSION, SITTING DROP;277 K;0.2 M lithium sulfate, 0.1 M HEPES, pH 7.5, 25% PEG3350
|
Resolution 1.70 Å R-free 0.230 |
23 other PDB entries and 23 assemblies. Open the comparison page and filter oligomeric states
View Construct and Data Evidence
| UniProt name | Q9L4P2_ACIBA |
| Isoform | — |
| PDB entities | 1 |
| Chains and sequence ranges | Author chain A; PDBConstruct 1–243; UniProt 31–273 Author chain B; PDBConstruct 1–243; UniProt 31–273 |