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- PDB-4ttt: Crystal structure of an O2-tolerant [NiFe]-hydrogenase from Ralst... -

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Basic information

Entry
Database: PDB / ID: 4ttt
TitleCrystal structure of an O2-tolerant [NiFe]-hydrogenase from Ralstonia eutropha in its as-isolated form - oxidized state 3
Components(Uptake hydrogenase ...) x 2
KeywordsOXIDOREDUCTASE / NIFE / HYDROGENASE / KNALLGASBACTERIA / PROTEOBACTERIA / AEROBIC HYDROGEN BACTERIA / DEHYDROGENASE / HYDROGEN CATALYSIS / METALLOENZYME / METALLOPROTEIN CATALYTIC CENTER / BIMETALLIC / NI-FE ACTIVE SITE / T-CLUSTER / oxidized state / OXYGEN-TOLERANT HYDROGENASE / MEMBRANE / MEMBRANE-BOUND / OXIDOREDUCTASE-OXIDOREDUCTASE COMPLEX
Function / homology
Function and homology information


hydrogenase (acceptor) / ferredoxin hydrogenase complex / [Ni-Fe] hydrogenase complex / hydrogenase (acceptor) activity / ferredoxin hydrogenase activity / anaerobic respiration / 3 iron, 4 sulfur cluster binding / nickel cation binding / 4 iron, 4 sulfur cluster binding / electron transfer activity ...hydrogenase (acceptor) / ferredoxin hydrogenase complex / [Ni-Fe] hydrogenase complex / hydrogenase (acceptor) activity / ferredoxin hydrogenase activity / anaerobic respiration / 3 iron, 4 sulfur cluster binding / nickel cation binding / 4 iron, 4 sulfur cluster binding / electron transfer activity / metal ion binding / plasma membrane
Similarity search - Function
Cytochrome-c3 Hydrogenase; Chain A, domain 2 / Cytochrome-c3 hydrogenase, C-terminal domain / NADH:ubiquinone oxidoreductase-like, 20kDa subunit / : / [NiFe]-hydrogenase, small subunit / Cytochrome-c3 hydrogenase, C-terminal / [NiFe]-hydrogenase, small subunit, C-terminal domain superfamily / NiFe/NiFeSe hydrogenase small subunit C-terminal / HoxL-like / Nickel-dependent hydrogenases large subunit signature 2. ...Cytochrome-c3 Hydrogenase; Chain A, domain 2 / Cytochrome-c3 hydrogenase, C-terminal domain / NADH:ubiquinone oxidoreductase-like, 20kDa subunit / : / [NiFe]-hydrogenase, small subunit / Cytochrome-c3 hydrogenase, C-terminal / [NiFe]-hydrogenase, small subunit, C-terminal domain superfamily / NiFe/NiFeSe hydrogenase small subunit C-terminal / HoxL-like / Nickel-dependent hydrogenases large subunit signature 2. / Nickel-dependent hydrogenases large subunit signature 1. / Cytochrome-c3 Hydrogenase; chain B / Cytochrome-c3 Hydrogenase, chain B / [NiFe]-hydrogenase, small subunit, N-terminal domain superfamily / Nickel-dependent hydrogenase, large subunit, nickel binding site / Nickel-dependent hydrogenase, large subunit / Nickel-dependent hydrogenase / Twin-arginine translocation pathway, signal sequence, bacterial/archaeal / NADH:ubiquinone oxidoreductase-like, 20kDa subunit / NADH ubiquinone oxidoreductase, 20 Kd subunit / [NiFe]-hydrogenase, large subunit / Twin arginine translocation (Tat) signal profile. / Twin-arginine translocation pathway, signal sequence / Few Secondary Structures / Irregular / Rossmann fold / Orthogonal Bundle / 3-Layer(aba) Sandwich / Mainly Alpha / Alpha Beta
Similarity search - Domain/homology
FE3-S4 CLUSTER / FE4-S3 CLUSTER / NI-FE OXIDIZED ACTIVE CENTER / PHOSPHATE ION / IRON/SULFUR CLUSTER / Uptake hydrogenase large subunit / Uptake hydrogenase small subunit
Similarity search - Component
Biological speciesRalstonia eutropha (bacteria)
MethodX-RAY DIFFRACTION / SYNCHROTRON / MOLECULAR REPLACEMENT / Resolution: 1.72 Å
AuthorsSchmidt, A. / Kalms, J. / Scheerer, P.
Funding support Germany, 1items
OrganizationGrant numberCountry
UNICAT Germany
CitationJournal: Proc.Natl.Acad.Sci.Usa / Year: 2018
Title: Tracking the route of molecular oxygen in O2-tolerant membrane-bound [NiFe] hydrogenase
Authors: Kalms, J. / Schmidt, A. / Frielingsdorf, S. / Utesch, T. / Gotthard, G. / von Stetten, D. / van der Linden, P. / Royant, A. / Mroginski, M. / Carpentier, P. / Lenz, O. / Scheerer, P.
History
DepositionJun 23, 2014Deposition site: RCSB / Processing site: RCSB
Revision 1.0Jan 28, 2015Provider: repository / Type: Initial release
Revision 1.1Feb 21, 2018Group: Database references / Derived calculations ...Database references / Derived calculations / Other / Source and taxonomy / Structure summary
Category: citation / citation_author ...citation / citation_author / entity_src_gen / pdbx_database_status / pdbx_struct_oper_list / struct
Item: _citation.country / _citation.journal_abbrev ..._citation.country / _citation.journal_abbrev / _citation.journal_id_ASTM / _citation.journal_id_CSD / _citation.journal_id_ISSN / _citation.pdbx_database_id_DOI / _citation.title / _citation.year / _entity_src_gen.pdbx_alt_source_flag / _pdbx_database_status.pdb_format_compatible / _pdbx_struct_oper_list.symmetry_operation / _struct.title
Revision 1.2Sep 27, 2023Group: Data collection / Database references ...Data collection / Database references / Derived calculations / Refinement description
Category: chem_comp_atom / chem_comp_bond ...chem_comp_atom / chem_comp_bond / database_2 / pdbx_initial_refinement_model / pdbx_struct_conn_angle / refine_hist / struct_conn
Item: _database_2.pdbx_DOI / _database_2.pdbx_database_accession ..._database_2.pdbx_DOI / _database_2.pdbx_database_accession / _pdbx_struct_conn_angle.ptnr1_auth_comp_id / _pdbx_struct_conn_angle.ptnr1_auth_seq_id / _pdbx_struct_conn_angle.ptnr1_label_asym_id / _pdbx_struct_conn_angle.ptnr1_label_atom_id / _pdbx_struct_conn_angle.ptnr1_label_comp_id / _pdbx_struct_conn_angle.ptnr1_label_seq_id / _pdbx_struct_conn_angle.ptnr3_auth_comp_id / _pdbx_struct_conn_angle.ptnr3_auth_seq_id / _pdbx_struct_conn_angle.ptnr3_label_asym_id / _pdbx_struct_conn_angle.ptnr3_label_atom_id / _pdbx_struct_conn_angle.ptnr3_label_comp_id / _pdbx_struct_conn_angle.ptnr3_label_seq_id / _pdbx_struct_conn_angle.value / _refine_hist.number_atoms_solvent / _refine_hist.number_atoms_total / _refine_hist.pdbx_number_atoms_ligand / _refine_hist.pdbx_number_atoms_nucleic_acid / _refine_hist.pdbx_number_atoms_protein / _struct_conn.pdbx_dist_value / _struct_conn.pdbx_value_order / _struct_conn.ptnr1_auth_asym_id / _struct_conn.ptnr1_auth_comp_id / _struct_conn.ptnr1_auth_seq_id / _struct_conn.ptnr1_label_asym_id / _struct_conn.ptnr1_label_atom_id / _struct_conn.ptnr1_label_comp_id / _struct_conn.ptnr1_label_seq_id / _struct_conn.ptnr2_auth_asym_id / _struct_conn.ptnr2_auth_comp_id / _struct_conn.ptnr2_auth_seq_id / _struct_conn.ptnr2_label_asym_id / _struct_conn.ptnr2_label_atom_id / _struct_conn.ptnr2_label_comp_id / _struct_conn.ptnr2_label_seq_id
Revision 1.3Aug 12, 2026Group: Derived calculations / Structure summary
Category: pdbx_entry_details / pdbx_modification_feature ...pdbx_entry_details / pdbx_modification_feature / pdbx_nonpoly_atom_coordination / pdbx_nonpoly_atom_coordination_sphere / pdbx_nonpoly_atom_coordination_sphere_order / struct_conn
Item: _struct_conn.pdbx_value_order / Description: Metalloprotein remediation / Provider: repository / Type: Remediation

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

Downloads & links

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Assembly

Deposited unit
L: Uptake hydrogenase large subunit hoxG
S: Uptake hydrogenase small subunit hoxK
hetero molecules


Theoretical massNumber of molelcules
Total (without water)106,05812
Polymers104,6322
Non-polymers1,42610
Water11,025612
1


  • Idetical with deposited unit
  • defined by author&software
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
Buried area9450 Å2
ΔGint-139 kcal/mol
Surface area26530 Å2
MethodPISA
Unit cell
Length a, b, c (Å)72.774, 95.570, 119.228
Angle α, β, γ (deg.)90.00, 90.00, 90.00
Int Tables number19
Space group name H-MP212121

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Components

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Uptake hydrogenase ... , 2 types, 2 molecules LS

#1: Protein Uptake hydrogenase large subunit hoxG / Hydrogenlyase / Membrane-bound hydrogenase large subunit


Mass: 67247.195 Da / Num. of mol.: 1 / Fragment: UNP residues 1-603
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Ralstonia eutropha (bacteria) / Strain: ATCC 17699 / H16 / DSM 428 / Stanier 337 / Gene: hoxG, PHG002 / Production host: Ralstonia eutropha (bacteria)
Strain (production host): ATCC 17699 / H16 / DSM 428 / Stanier 337
References: UniProt: P31891, hydrogenase (acceptor)
#2: Protein Uptake hydrogenase small subunit hoxK / Hydrogenlyase / Membrane-bound hydrogenase small subunit


Mass: 37384.520 Da / Num. of mol.: 1 / Fragment: RESIDUES 44-360
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Ralstonia eutropha (bacteria) / Strain: ATCC 17699 / H16 / DSM 428 / Stanier 337 / Gene: hoxK, PHG001 / Production host: Ralstonia eutropha (bacteria) / Strain (production host): H16 / DSM 428 / STANIER 337 / References: UniProt: P31892, hydrogenase (acceptor)

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Non-polymers , 9 types, 622 molecules

#3: Chemical ChemComp-NFV / NI-FE OXIDIZED ACTIVE CENTER


Mass: 210.583 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: C3FeN2NiO2
#4: Chemical ChemComp-PO4 / PHOSPHATE ION


Mass: 94.971 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: PO4
#5: Chemical ChemComp-MG / MAGNESIUM ION


Mass: 24.305 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: Mg
#6: Chemical ChemComp-CL / CHLORIDE ION


Mass: 35.453 Da / Num. of mol.: 3 / Source method: obtained synthetically / Formula: Cl
#7: Chemical ChemComp-NA / SODIUM ION


Mass: 22.990 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: Na
#8: Chemical ChemComp-SF4 / IRON/SULFUR CLUSTER


Mass: 351.640 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: Fe4S4
#9: Chemical ChemComp-F3S / FE3-S4 CLUSTER


Mass: 295.795 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: Fe3S4
#10: Chemical ChemComp-F4S / FE4-S3 CLUSTER / T-CLUSTER


Mass: 319.575 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: Fe4S3
#11: Water ChemComp-HOH / water


Mass: 18.015 Da / Num. of mol.: 612 / Source method: isolated from a natural source / Formula: H2O

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Details

Has protein modificationY

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Experimental details

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Experiment

ExperimentMethod: X-RAY DIFFRACTION / Number of used crystals: 1

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Sample preparation

CrystalDensity Matthews: 2.11 Å3/Da / Density % sol: 41.63 %
Crystal growTemperature: 282 K / Method: vapor diffusion / Details: 20-30% PEG3350, 100 mM Bis-Tris / PH range: 5.5 - 6.5

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Data collection

DiffractionMean temperature: 100 K
Diffraction sourceSource: SYNCHROTRON / Site: ESRF / Beamline: ID29 / Wavelength: 0.96863 Å
DetectorType: DECTRIS PILATUS 6M-F / Detector: PIXEL / Date: Feb 23, 2013 / Details: MIRROR
RadiationMonochromator: SI(311) / Protocol: SINGLE WAVELENGTH / Monochromatic (M) / Laue (L): M / Scattering type: x-ray
Radiation wavelengthWavelength: 0.96863 Å / Relative weight: 1
ReflectionResolution: 1.72→47.78 Å / Num. all: 88794 / Num. obs: 84252 / % possible obs: 99.9 % / Redundancy: 4.8 % / Net I/σ(I): 9.3
Reflection shellResolution: 1.72→1.81 Å / Redundancy: 4.7 % / Mean I/σ(I) obs: 2.6 / % possible all: 99.7

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Processing

SoftwareName: REFMAC / Version: 5.7.0032 / Classification: refinement
RefinementMethod to determine structure: MOLECULAR REPLACEMENT
Starting model: 3RGW

3rgw


Resolution: 1.72→47.83 Å / Cor.coef. Fo:Fc: 0.978 / Cor.coef. Fo:Fc free: 0.969 / SU B: 4.124 / SU ML: 0.059 / Cross valid method: THROUGHOUT / ESU R: 0.16 / ESU R Free: 0.086 / Stereochemistry target values: MAXIMUM LIKELIHOOD / Details: HYDROGENS HAVE BEEN ADDED IN THE RIDING POSITIONS
RfactorNum. reflection% reflectionSelection details
Rfree0.16458 4447 5 %RANDOM
Rwork0.134 ---
obs0.13554 84252 99.79 %-
Solvent computationIon probe radii: 0.8 Å / Shrinkage radii: 0.8 Å / VDW probe radii: 1.2 Å / Solvent model: MASK
Displacement parametersBiso mean: 27.224 Å2
Baniso -1Baniso -2Baniso -3
1--0.5 Å2-0 Å20 Å2
2---0.14 Å2-0 Å2
3---0.64 Å2
Refinement stepCycle: 1 / Resolution: 1.72→47.83 Å
ProteinNucleic acidLigandSolventTotal
Num. atoms6794 0 41 612 7447
Refine LS restraints
Refine-IDTypeDev idealDev ideal targetNumber
X-RAY DIFFRACTIONr_bond_refined_d0.0070.027116
X-RAY DIFFRACTIONr_bond_other_d0.0020.026658
X-RAY DIFFRACTIONr_angle_refined_deg1.1551.9439700
X-RAY DIFFRACTIONr_angle_other_deg0.9315347
X-RAY DIFFRACTIONr_dihedral_angle_1_deg5.6145902
X-RAY DIFFRACTIONr_dihedral_angle_2_deg33.74123.75328
X-RAY DIFFRACTIONr_dihedral_angle_3_deg11.889151161
X-RAY DIFFRACTIONr_dihedral_angle_4_deg15.0131548
X-RAY DIFFRACTIONr_chiral_restr0.0660.21037
X-RAY DIFFRACTIONr_gen_planes_refined0.0050.0218167
X-RAY DIFFRACTIONr_gen_planes_other0.0010.021677
X-RAY DIFFRACTIONr_nbd_refined
X-RAY DIFFRACTIONr_nbd_other
X-RAY DIFFRACTIONr_nbtor_refined
X-RAY DIFFRACTIONr_nbtor_other
X-RAY DIFFRACTIONr_xyhbond_nbd_refined
X-RAY DIFFRACTIONr_xyhbond_nbd_other
X-RAY DIFFRACTIONr_metal_ion_refined
X-RAY DIFFRACTIONr_metal_ion_other
X-RAY DIFFRACTIONr_symmetry_vdw_refined
X-RAY DIFFRACTIONr_symmetry_vdw_other
X-RAY DIFFRACTIONr_symmetry_hbond_refined
X-RAY DIFFRACTIONr_symmetry_hbond_other
X-RAY DIFFRACTIONr_symmetry_metal_ion_refined
X-RAY DIFFRACTIONr_symmetry_metal_ion_other
X-RAY DIFFRACTIONr_mcbond_it1.4852.3163512
X-RAY DIFFRACTIONr_mcbond_other1.4852.3163511
X-RAY DIFFRACTIONr_mcangle_it1.893.4774398
X-RAY DIFFRACTIONr_mcangle_other1.893.4774399
X-RAY DIFFRACTIONr_scbond_it1.4822.5063604
X-RAY DIFFRACTIONr_scbond_other1.4822.5063595
X-RAY DIFFRACTIONr_scangle_it
X-RAY DIFFRACTIONr_scangle_other1.7963.6845278
X-RAY DIFFRACTIONr_long_range_B_refined2.91519.6118876
X-RAY DIFFRACTIONr_long_range_B_other2.56819.0618525
X-RAY DIFFRACTIONr_rigid_bond_restr1.65313774
X-RAY DIFFRACTIONr_sphericity_free23.9215142
X-RAY DIFFRACTIONr_sphericity_bonded11.153514076
LS refinement shellResolution: 1.72→1.765 Å / Total num. of bins used: 20
RfactorNum. reflection% reflection
Rfree0.258 301 -
Rwork0.213 6175 -
obs--99.4 %
Refinement TLS params.

Method: refined / Refine-ID: X-RAY DIFFRACTION

IDL11 (°2)L12 (°2)L13 (°2)L22 (°2)L23 (°2)L33 (°2)S11 (Å °)S12 (Å °)S13 (Å °)S21 (Å °)S22 (Å °)S23 (Å °)S31 (Å °)S32 (Å °)S33 (Å °)T11 (Å2)T12 (Å2)T13 (Å2)T22 (Å2)T23 (Å2)T33 (Å2)Origin x (Å)Origin y (Å)Origin z (Å)
10.10310.1538-0.03160.2355-0.04690.0099-0.01140.0025-0.0197-0.01910.005-0.01760.0032-0.00280.00640.0258-0.0026-0.0050.02680.00310.027138.83062.9455-6.866
20.1201-0.08720.08670.0646-0.07770.3017-0.0061-0.009-0.00260.00810.00470.0011-0.01950.01130.00150.0105-0.0051-0.00490.0235-0.00080.026323.0519-5.5132-24.5621
Refinement TLS group
IDRefine-IDRefine TLS-IDAuth asym-IDAuth seq-ID
1X-RAY DIFFRACTION1L3 - 603
2X-RAY DIFFRACTION2S5 - 273

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