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- PDB-2sgq: GLN 18 VARIANT OF TURKEY OVOMUCOID INHIBITOR THIRD DOMAIN COMPLEX... -

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Basic information

Entry
Database: PDB / ID: 2sgq
TitleGLN 18 VARIANT OF TURKEY OVOMUCOID INHIBITOR THIRD DOMAIN COMPLEXED WITH STREPTOMYCES GRISEUS PROTEINASE B AT PH 6.5
Components
  • Ovomucoid
  • Streptogrisin B
KeywordsHYDROLASE/HYDROLASE INHIBITOR / COMPLEX (SERINE PROTEASE-INHIBITOR) / SERINE PROTEINASE / PROTEIN INHIBITOR / HYDROLASE-HYDROLASE INHIBITOR COMPLEX
Function / homology
Function and homology information


streptogrisin B / molecular function inhibitor activity / serine-type endopeptidase inhibitor activity / serine-type endopeptidase activity / proteolysis / extracellular region
Similarity search - Function
Proteinase inhibitor I1, Kazal-type, metazoa / Kazal serine protease inhibitors family signature. / Peptidase S1A, alpha-lytic prodomain / Alpha-lytic protease prodomain / Peptidase S1A, streptogrisin / Kazal-type serine protease inhibitor domain / Wheat Germ Agglutinin (Isolectin 2); domain 1 - #30 / Kazal type serine protease inhibitors / Kazal domain superfamily / Kazal domain ...Proteinase inhibitor I1, Kazal-type, metazoa / Kazal serine protease inhibitors family signature. / Peptidase S1A, alpha-lytic prodomain / Alpha-lytic protease prodomain / Peptidase S1A, streptogrisin / Kazal-type serine protease inhibitor domain / Wheat Germ Agglutinin (Isolectin 2); domain 1 - #30 / Kazal type serine protease inhibitors / Kazal domain superfamily / Kazal domain / Kazal domain profile. / Wheat Germ Agglutinin (Isolectin 2); domain 1 / Serine proteases, trypsin family, histidine active site / Serine proteases, trypsin family, serine active site / Serine proteases, trypsin family, histidine active site. / Serine proteases, trypsin family, serine active site. / Serine proteases, trypsin domain / Trypsin / Trypsin-like serine proteases / Thrombin, subunit H / Peptidase S1, PA clan, chymotrypsin-like fold / Peptidase S1, PA clan / Beta Barrel / 2-Layer Sandwich / Mainly Beta / Alpha Beta
Similarity search - Domain/homology
PHOSPHATE ION / Streptogrisin-B / Ovomucoid
Similarity search - Component
Biological speciesMeleagris gallopavo (turkey)
Streptomyces griseus (bacteria)
MethodX-RAY DIFFRACTION / MOLECULAR REPLACEMENT / Resolution: 1.8 Å
AuthorsHuang, K. / Lu, W. / Anderson, S. / Laskowski Jr., M. / James, M.N.G.
Citation
Journal: To be Published
Title: Recruitment of a Buried K+ Ion to Stabilize the Negative Charge of Ionized P1 in the Hydrophobic Pocket: Crystal Structures of Glu18, Gln18, Asp18 and Asn18 Variants of Turkey Ovomucoid ...Title: Recruitment of a Buried K+ Ion to Stabilize the Negative Charge of Ionized P1 in the Hydrophobic Pocket: Crystal Structures of Glu18, Gln18, Asp18 and Asn18 Variants of Turkey Ovomucoid Inhibitor Third Domain Complexed with Streptomyces griseus Protease B at Various pH's
Authors: Huang, K. / Lu, W. / Anderson, S. / Laskowski Jr., M. / James, M.N.G.
#1: Journal: Protein Sci. / Year: 1995
Title: Water Molecules Participates in Proteinase-Inhibitor Interactions: Crystal Structure of Leu18, Ala18 and Gly18 Variants of Turkey Ovomucoid Inhibitor Third Domain Complexed with Streptomyces griseus Proteinase B
Authors: Huang, K. / Lu, W. / Anderson, S. / Laskowski Jr., M. / James, M.N.G.
#2: Journal: Biochemistry / Year: 1983
Title: Structure of the Complex of Streptomyces griseus Protease B and the Third Domain of the Turkey Ovomucoid Inhibitor at 1.8 Angstroms Resolution
Authors: Read, R.J. / Fujinaga, M. / Sielecki, A.R. / James, M.N.G.
History
DepositionMar 25, 1999Deposition site: BNL / Processing site: RCSB
Revision 1.0Aug 26, 2003Provider: repository / Type: Initial release
Revision 1.1Oct 16, 2007Group: Version format compliance
Revision 1.2Jul 13, 2011Group: Version format compliance
Revision 1.3Feb 1, 2017Group: Database references
Revision 1.4Nov 29, 2017Group: Derived calculations / Category: struct_conf / struct_conf_type
Revision 1.5Aug 30, 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 / struct_ref_seq_dif / struct_site
Item: _database_2.pdbx_DOI / _database_2.pdbx_database_accession ..._database_2.pdbx_DOI / _database_2.pdbx_database_accession / _struct_ref_seq_dif.details / _struct_site.pdbx_auth_asym_id / _struct_site.pdbx_auth_comp_id / _struct_site.pdbx_auth_seq_id
Revision 1.6Oct 30, 2024Group: Structure summary / Category: pdbx_entry_details / pdbx_modification_feature

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

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Assembly

Deposited unit
E: Streptogrisin B
I: Ovomucoid
hetero molecules


Theoretical massNumber of molelcules
Total (without water)24,3483
Polymers24,2532
Non-polymers951
Water2,810156
1


  • Idetical with deposited unit
  • defined by author
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
Unit cell
Length a, b, c (Å)45.410, 54.700, 45.590
Angle α, β, γ (deg.)90.00, 119.17, 90.00
Int Tables number4
Space group name H-MP1211

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Components

#1: Protein Streptogrisin B / Protease B / SGPB / Pronase enzyme B


Mass: 18653.232 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Streptomyces griseus (bacteria) / Strain: K1 / References: UniProt: P00777, streptogrisin B
#2: Protein Ovomucoid / GLN18-OMTKY3


Mass: 5600.260 Da / Num. of mol.: 1 / Fragment: THIRD DOMAIN / Mutation: DEL(1-6), L18Q
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Meleagris gallopavo (turkey) / Plasmid: PEZZ318.TKY / Production host: Escherichia coli (E. coli) / References: UniProt: P68390
#3: Chemical ChemComp-PO4 / PHOSPHATE ION


Mass: 94.971 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: PO4
#4: Water ChemComp-HOH / water


Mass: 18.015 Da / Num. of mol.: 156 / Source method: isolated from a natural source / Formula: H2O
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: 2.04 Å3/Da / Density % sol: 39.64 %
Crystal growpH: 6.5 / Details: 0.4 M SODIUM/POTASSIUM PHOSPHATE buffer AT PH 6.5

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Data collection

DiffractionMean temperature: 287 K
Diffraction sourceSource: ROTATING ANODE / Type: RIGAKU RU200 / Wavelength: 1.5418
DetectorType: SDMS / Detector: AREA DETECTOR
RadiationMonochromator: NI FILTER / Protocol: SINGLE WAVELENGTH / Monochromatic (M) / Laue (L): M / Scattering type: x-ray
Radiation wavelengthWavelength: 1.5418 Å / Relative weight: 1
ReflectionResolution: 1.8→20 Å / Num. obs: 17441 / % possible obs: 89 % / Redundancy: 2.1 % / Rmerge(I) obs: 0.089

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Processing

SoftwareName: TNT / Classification: refinement
RefinementMethod to determine structure: MOLECULAR REPLACEMENT
Starting model: 3SGB

3sgb


Resolution: 1.8→20 Å / σ(F): 0 / Stereochemistry target values: TNT PROTGEO
RfactorNum. reflection% reflection
Rwork0.149 --
obs-17167 90.4 %
Refinement stepCycle: LAST / Resolution: 1.8→20 Å
ProteinNucleic acidLigandSolventTotal
Num. atoms1697 0 5 156 1858
Refine LS restraints
Refine-IDTypeDev ideal
X-RAY DIFFRACTIONt_bond_d0.022
X-RAY DIFFRACTIONt_angle_deg2.5
X-RAY DIFFRACTIONt_dihedral_angle_d
X-RAY DIFFRACTIONt_incorr_chiral_ct
X-RAY DIFFRACTIONt_pseud_angle
X-RAY DIFFRACTIONt_trig_c_planes
X-RAY DIFFRACTIONt_gen_planes0.02
X-RAY DIFFRACTIONt_it
X-RAY DIFFRACTIONt_nbd

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