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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：Q8NW39 New Search
9PDB entries
10Biological assembly
16chain/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
2LHR Solution structure of Staphylococcus aureus IsdH linker domain Deposited 2011-08-12 Assembly 1 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric（1） Consistent with protein count
Chain A 467–543（77 aa） Fragment：UNP residues 467-543
Not recorded No recorded non-water small molecule SOLUTION NMR
NMR measurement conditions pH 6；298 K；Ionic strength (raw mmCIF value) 140；Pressure ambient
NMR sample composition 1.1 mM [U-100% 15N] IsdH linker, 20 mM potassium phosphate, 50 mM potassium chloride, 100 uM AEBSF protease inhibitor, 0.01 % sodium azide, 7 % D2O, 93% H2O/7% D2O | 93% H2O/7% D2O
NMR sample composition 1.3 mM [U-100% 13C; U-100% 15N] IsdH linker, 20 mM potassium phosphate, 50 mM potassium chloride, 100 uM AEBSF protease inhibitor, 0.01 % sodium azide, 7 % D2O, 93% H2O/7% D2O | 93% H2O/7% D2O
NMR sample composition 1.3 mM [U-100% 13C; U-100% 15N] IsdH linker, 20 mM potassium phosphate, 50 mM potassium chloride, 100 uM AEBSF protease inhibitor, 0.01 % sodium azide, 100 % D2O, 100% D2O | 100% D2O
Resolution not provided
3SZK Crystal Structure of Human metHaemoglobin Complexed with the First NEAT Domain of IsdH from Staphylococcus aureus Deposited 2011-07-19 Assembly 1 Protein heterocomplex Heteromer；Protein × 3 PDB declaration: trimeric（3） Consistent with protein count
Chain F 86–229（144 aa） Fragment：first NEAT domain
Not recorded HEM PROTOPORPHYRIN IX CONTAINING FE × 2 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 7.5；293 K；0.2M potassium thiocyanate, 0.1M Tris-bis propane, 20% PEG 3350 , pH 7.5, VAPOR DIFFUSION, HANGING DROP, temperature 293K
Resolution 3.01 Å R-free 0.275
3SZK Crystal Structure of Human metHaemoglobin Complexed with the First NEAT Domain of IsdH from Staphylococcus aureus Deposited 2011-07-19 Assembly 2 Protein heterocomplex Heteromer；Protein × 3 PDB declaration: trimeric（3） Consistent with protein count
Chain C 86–229（144 aa） Fragment：first NEAT domain
Not recorded HEM PROTOPORPHYRIN IX CONTAINING FE × 2 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 7.5；293 K；0.2M potassium thiocyanate, 0.1M Tris-bis propane, 20% PEG 3350 , pH 7.5, VAPOR DIFFUSION, HANGING DROP, temperature 293K
Resolution 3.01 Å R-free 0.275
4FC3 Crystal Structure of Human Methaemoglobin Complexed with the Second NEAT Domain of IsdH from Staphylococcus aureus Deposited 2012-05-24 Assembly 1 Protein heterocomplex Heteromer；Protein × 6 PDB declaration: hexameric（6） Consistent with protein count
Chain E 321–464（144 aa） Fragment：Second NEAT domain
Not recorded HEM PROTOPORPHYRIN IX CONTAINING FE × 4 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 7.5；293 K；0.2M Sodium formate, 0.1M bis-tris propane, 20% PEG3350, pH 7.5, VAPOR DIFFUSION, HANGING DROP, temperature 293K
Resolution 2.26 Å R-free 0.256
9S3P Human carboxyhemoglobin bound to Staphylococcus aureus IsdH-N2N3 - 3IsdH(alpha2beta):Hbtet complex Deposited 2025-07-24 Assembly 1 Protein heterocomplex Heteromer；Protein × 7 PDB declaration: heptameric（7） Consistent with protein count
Chain E 326–665（340 aa）
Chain F 326–665（340 aa）
Chain G 326–665（340 aa）
Not recorded HEM PROTOPORPHYRIN IX CONTAINING FE × 4 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.2
cryo-EM vitrification conditions Cryogen ETHANE；blot time 3 s
Resolution 3.10 Å
9S4F Human carboxyhemoglobin bound to Staphylococcus aureus IsdH-N2N3 - 2IsdH:Hbdim complex - 3DVA component 4 right tail Deposited 2025-07-28 Assembly 1 Protein heterocomplex Heteromer；Protein × 4 PDB declaration: tetrameric（4） Consistent with protein count
Chain C 326–665（340 aa）
Chain D 326–665（340 aa）
Not recorded HEM PROTOPORPHYRIN IX CONTAINING FE × 2 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.2
cryo-EM vitrification conditions Cryogen ETHANE；blot time 3 s
Resolution 4.20 Å
9S4I Human carboxyhemoglobin bound to Staphylococcus aureus IsdH-N2N3 - 2IsdH:Hbdim complex - 3DVA component 0 left tail Deposited 2025-07-28 Assembly 1 Protein heterocomplex Heteromer；Protein × 4 PDB declaration: tetrameric（4） Consistent with protein count
Chain C 326–665（340 aa）
Chain D 326–665（340 aa）
Not recorded HEM PROTOPORPHYRIN IX CONTAINING FE × 2 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.2
cryo-EM vitrification conditions Cryogen ETHANE；blot time 3 s
Resolution 4.00 Å
9S4J Human carboxyhemoglobin bound to Staphylococcus aureus IsdH-N2N3 - 2IsdH:Hbdim complex - 3DVA component 0 right tail Deposited 2025-07-28 Assembly 1 Protein heterocomplex Heteromer；Protein × 4 PDB declaration: tetrameric（4） Consistent with protein count
Chain C 326–665（340 aa）
Chain D 326–665（340 aa）
Not recorded HEM PROTOPORPHYRIN IX CONTAINING FE × 2 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.2
cryo-EM vitrification conditions Cryogen ETHANE；blot time 3 s
Resolution 4.10 Å
9S4K Human carboxyhemoglobin bound to Staphylococcus aureus IsdH-N2N3 - 2IsdH:Hbdim complex - 3DVA component 4 left tail Deposited 2025-07-28 Assembly 1 Protein heterocomplex Heteromer；Protein × 4 PDB declaration: tetrameric（4） Consistent with protein count
Chain C 326–665（340 aa）
Chain D 326–665（340 aa）
Not recorded HEM PROTOPORPHYRIN IX CONTAINING FE × 2 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.2
cryo-EM vitrification conditions Cryogen ETHANE；blot time 3 s
Resolution 4.00 Å
9SZW Human carboxyhemoglobin bound to full-length Staphylococcus aureus IsdH - IsdH:Hbdim complex Deposited 2025-10-16 Assembly 1 Protein heterocomplex Heteromer；Protein × 3 PDB declaration: trimeric（3） Consistent with protein count
Chain C 86–665（580 aa）
Not recorded HEM PROTOPORPHYRIN IX CONTAINING FE × 2 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.2
cryo-EM vitrification conditions Cryogen ETHANE；blot time 3 s
Resolution 3.14 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.