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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：P20429 New Search
10PDB entries
10Biological assembly
18chain/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
1Z3E Crystal Structure of Spx in Complex with the C-terminal Domain of the RNA Polymerase Alpha Subunit Deposited 2005-03-11 Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain B 245–314（70 aa） Fragment：c-terminal domain of RNA polymerase alpha subunit
Not recorded SO4 SULFATE ION × 4 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION；pH 5.6；273 K；lithium sulfate, ammonium sulfate, sodium citrate, pH 5.6, VAPOR DIFFUSION, temperature 273K
Resolution 1.50 Å R-free 0.220
3GFK Crystal structure of Bacillus subtilis Spx/RNA polymerase alpha subunit C-terminal domain complex Deposited 2009-02-27 Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain B 240–314（75 aa） Fragment：Alpha C-terminal domain (alpha-CTD)
Not recorded No recorded non-water small molecule X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION；pH 5；295 K；vapor diffusion against 6% (w/v) PEG 6000, 100 mM sodium acetate, pH 5.0, 10 micromolar CuCl2, protein concentration 11.5 mg/mL, temperature 295K
Resolution 2.30 Å R-free 0.282
3IHQ Crystal Structure of Reduced C10S Spx in Complex with the Alpha C-terminal Domain of RNA Polymeras Deposited 2009-07-30 Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain B 245–314（70 aa） Fragment：UNP residues 245-314
Not recorded IMD IMIDAZOLE × 1 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 5.3；273 K；25-30% PEG 4000, 0.1 M sodium citrate, 0.1 M magnesium chloride, pH 5.3, VAPOR DIFFUSION, HANGING DROP, temperature 273K
Resolution 1.90 Å R-free 0.278
6WVJ Cryo-EM structure of Bacillus subtilis RNA Polymerase elongation complex Deposited 2020-05-06 Assembly 1 Other combination Heteromer；Protein × 5 PDB declaration: octameric（8） Consistent with all polymers
Chain A 1–314（314 aa）
Chain B 1–314（314 aa）
Not recorded ZN ZINC ION × 2 MG MAGNESIUM ION × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.8
cryo-EM vitrification conditions Cryogen ETHANE；Sample loading volume ranged between 2 and 3 microlitres. Samples were blotted for 5 seconds prior to vitrification.
Resolution 3.36 Å
6WVK Cryo-EM structure of Bacillus subtilis RNA Polymerase in complex with HelD Deposited 2020-05-06 Assembly 1 Protein heterocomplex Heteromer；Protein × 7 PDB declaration: heptameric（7） Consistent with protein count
Chain A 1–314（314 aa）
Chain B 1–314（314 aa）
Not recorded ZN ZINC ION × 2 MG MAGNESIUM ION × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.8
cryo-EM vitrification conditions Cryogen ETHANE；Sample loading volume ranged between 2 and 3 microlitres. Samples were blotted for 5 seconds prior to vitrification.
Resolution 3.36 Å
7CKQ The cryo-EM structure of B. subtilis BmrR transcription activation complex Deposited 2020-07-18 Assembly 1 Protein–DNA Heteromer；Protein × 9 PDB declaration: undecameric（11） Consistent with all polymers
Chain A 1–314（314 aa）
Chain B 1–314（314 aa）
Not recorded MG MAGNESIUM ION × 1 ZN ZINC ION × 2 P4P TETRAPHENYLPHOSPHONIUM × 2 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 4.40 Å
7F75 Cryo-EM structure of Spx-dependent transcription activation complex Deposited 2021-06-28 Assembly 1 Protein–DNA Heteromer；Protein × 10 PDB declaration: dodecameric（12） Consistent with all polymers
Chain A 1–314（314 aa）
Chain B 1–314（314 aa）
Chain I 1–314（314 aa）
Not recorded MG MAGNESIUM ION × 1 ZN ZINC ION × 2 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 4.20 Å
8XA6 Cryo-EM structure of Bacillus RNAP and SPO1 gp33 complex Deposited 2023-12-02 Assembly 1 Protein heterocomplex Heteromer；Protein × 8 PDB declaration: octameric（8） Consistent with protein count
Chain A 1–314（314 aa）
Chain B 1–314（314 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 8
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.02 Å
8XA7 Cryo-EM structure of Bacillus subtilis RNAP,sigA and SPO1 gp33 complex Deposited 2023-12-02 Assembly 1 Protein heterocomplex Heteromer；Protein × 9 PDB declaration: nonameric（9） Consistent with protein count
Chain A 1–314（314 aa）
Chain B 1–314（314 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 8
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.94 Å
8XA8 Cryo-EM structure of Bacillus RNAP and HelD complex Deposited 2023-12-02 Assembly 1 Protein heterocomplex Heteromer；Protein × 8 PDB declaration: octameric（8） Consistent with protein count
Chain A 1–314（314 aa）
Chain B 1–314（314 aa）
Not recorded ZN ZINC ION × 2 MG MAGNESIUM ION × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 8
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.19 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.