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- PDB-1rtk: Crystal Structure Analysis of the Bb segment of Factor B complexe... -

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Basic information

Entry
Database: PDB / ID: 1rtk
TitleCrystal Structure Analysis of the Bb segment of Factor B complexed with 4-guanidinobenzoic acid
ComponentsComplement factor B Bb fragment
KeywordsHORMONE/GROWTH FACTOR / factor B / Bb / factor Bb-inhibitor complex / HORMONE-GROWTH FACTOR COMPLEX
Function / homology
Function and homology information


alternative-complement-pathway C3/C5 convertase / complement binding / Alternative complement activation / Activation of C3 and C5 / complement activation / complement activation, alternative pathway / Regulation of Complement cascade / response to bacterium / blood microparticle / serine-type endopeptidase activity ...alternative-complement-pathway C3/C5 convertase / complement binding / Alternative complement activation / Activation of C3 and C5 / complement activation / complement activation, alternative pathway / Regulation of Complement cascade / response to bacterium / blood microparticle / serine-type endopeptidase activity / proteolysis / extracellular space / extracellular exosome / extracellular region / plasma membrane
Similarity search - Function
Complement factor B / Complement B/C2 / von Willebrand factor, type A domain / Sushi repeat (SCR repeat) / Domain abundant in complement control proteins; SUSHI repeat; short complement-like repeat (SCR) / Sushi/SCR/CCP domain / Sushi/CCP/SCR domain profile. / Sushi/SCR/CCP superfamily / von Willebrand factor type A domain / von Willebrand factor (vWF) type A domain ...Complement factor B / Complement B/C2 / von Willebrand factor, type A domain / Sushi repeat (SCR repeat) / Domain abundant in complement control proteins; SUSHI repeat; short complement-like repeat (SCR) / Sushi/SCR/CCP domain / Sushi/CCP/SCR domain profile. / Sushi/SCR/CCP superfamily / von Willebrand factor type A domain / von Willebrand factor (vWF) type A domain / VWFA domain profile. / von Willebrand factor, type A / von Willebrand factor A-like domain superfamily / Serine proteases, trypsin family, histidine active site / Serine proteases, trypsin family, serine active site / Peptidase S1A, chymotrypsin family / Serine proteases, trypsin family, histidine active site. / Serine proteases, trypsin family, serine active site. / Serine proteases, trypsin domain profile. / Trypsin-like serine protease / Serine proteases, trypsin domain / Trypsin / Trypsin-like serine proteases / Thrombin, subunit H / Peptidase S1, PA clan / Beta Barrel / Rossmann fold / 3-Layer(aba) Sandwich / Mainly Beta / Alpha Beta
Similarity search - Domain/homology
4-carbamimidamidobenzoic acid / IODIDE ION / Complement factor B
Similarity search - Component
Biological speciesHomo sapiens (human)
MethodX-RAY DIFFRACTION / MOLECULAR REPLACEMENT / Resolution: 2.3 Å
AuthorsPonnuraj, K. / Xu, Y. / Macon, K. / Moore, D. / Volanakis, J.E. / Narayana, S.V.
CitationJournal: Mol.Cell / Year: 2004
Title: Structural analysis of engineered Bb fragment of complement factor B: insights into the activation mechanism of the alternative pathway C3-convertase.
Authors: Ponnuraj, K. / Xu, Y. / Macon, K. / Moore, D. / Volanakis, J.E. / Narayana, S.V.
History
DepositionDec 10, 2003Deposition site: RCSB / Processing site: RCSB
Revision 1.0Dec 14, 2004Provider: repository / Type: Initial release
Revision 1.1Apr 29, 2008Group: Version format compliance
Revision 1.2Jul 13, 2011Group: Version format compliance
Revision 2.0Oct 27, 2021Group: Advisory / Atomic model ...Advisory / Atomic model / Database references / Derived calculations / Source and taxonomy / Structure summary
Category: atom_site / chem_comp ...atom_site / chem_comp / database_2 / entity / entity_name_com / entity_src_gen / pdbx_distant_solvent_atoms / pdbx_entity_nonpoly / pdbx_struct_conn_angle / pdbx_validate_close_contact / struct_conn / struct_ref_seq_dif / struct_site
Item: _atom_site.B_iso_or_equiv / _atom_site.Cartn_x ..._atom_site.B_iso_or_equiv / _atom_site.Cartn_x / _atom_site.Cartn_y / _atom_site.Cartn_z / _atom_site.auth_atom_id / _atom_site.label_atom_id / _atom_site.type_symbol / _chem_comp.name / _chem_comp.pdbx_synonyms / _database_2.pdbx_DOI / _database_2.pdbx_database_accession / _entity.pdbx_description / _entity.pdbx_ec / _entity_src_gen.gene_src_common_name / _entity_src_gen.pdbx_beg_seq_num / _entity_src_gen.pdbx_end_seq_num / _entity_src_gen.pdbx_gene_src_gene / _entity_src_gen.pdbx_seq_type / _pdbx_entity_nonpoly.name / _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 / _pdbx_validate_close_contact.auth_atom_id_2 / _struct_conn.pdbx_dist_value / _struct_conn.pdbx_leaving_atom_flag / _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.ptnr1_symmetry / _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 / _struct_conn.ptnr2_symmetry / _struct_ref_seq_dif.details / _struct_site.pdbx_auth_asym_id / _struct_site.pdbx_auth_comp_id / _struct_site.pdbx_auth_seq_id
Revision 2.1Aug 23, 2023Group: Data collection / Refinement description
Category: chem_comp_atom / chem_comp_bond / pdbx_initial_refinement_model
Revision 2.2Oct 16, 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
A: Complement factor B Bb fragment
hetero molecules


Theoretical massNumber of molelcules
Total (without water)56,86412
Polymers56,2461
Non-polymers61811
Water4,900272
1


  • Idetical with deposited unit
  • defined by author
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
Unit cell
Length a, b, c (Å)98.355, 98.355, 125.657
Angle α, β, γ (deg.)90.00, 90.00, 120.00
Int Tables number169
Space group name H-MP61

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Components

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Protein , 1 types, 1 molecules A

#1: Protein Complement factor B Bb fragment


Mass: 56246.160 Da / Num. of mol.: 1 / Fragment: COMPLEMENT FACTOR B BB FRAGMENT / Mutation: F428C, N435C, C267V
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Description: SF9 cells were also used / Gene: CFB, BF, BFD / Cell (production host): egg / Cell line (production host): BTI-TN-5B1-4 / Production host: Trichoplusia ni (cabbage looper) / References: UniProt: P00751

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Non-polymers , 5 types, 283 molecules

#2: Chemical ChemComp-IOD / IODIDE ION


Mass: 126.904 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: I
#3: Chemical
ChemComp-NA / SODIUM ION


Mass: 22.990 Da / Num. of mol.: 7 / Source method: obtained synthetically / Formula: Na
#4: Chemical ChemComp-MG / MAGNESIUM ION


Mass: 24.305 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: Mg
#5: Chemical ChemComp-GBS / 4-carbamimidamidobenzoic acid / Nafamostat, bound form


Mass: 179.176 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: C8H9N3O2
Comment: anticancer, anticoagulant, antivirus, protease inhibitor*YM
#6: Water ChemComp-HOH / water


Mass: 18.015 Da / Num. of mol.: 272 / 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: 3.12 Å3/Da / Density % sol: 60.57 %
Crystal growTemperature: 298 K / Method: vapor diffusion, hanging drop
Details: PEGMME 2000, NaI, VAPOR DIFFUSION, HANGING DROP, temperature 298K

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Data collection

DiffractionMean temperature: 298 K
Diffraction sourceSource: ROTATING ANODE / Type: RIGAKU / Wavelength: 1.5418 Å
DetectorType: RIGAKU RAXIS IV / Detector: IMAGE PLATE
RadiationProtocol: SINGLE WAVELENGTH / Monochromatic (M) / Laue (L): M / Scattering type: x-ray
Radiation wavelengthWavelength: 1.5418 Å / Relative weight: 1
ReflectionResolution: 2.3→50 Å / Num. all: 30678 / Num. obs: 30559 / % possible obs: 99.6 % / Observed criterion σ(F): 0 / Observed criterion σ(I): 0 / Redundancy: 3.7 % / Biso Wilson estimate: 24.8 Å2 / Rmerge(I) obs: 0.072 / Net I/σ(I): 18.6
Reflection shellResolution: 2.3→2.38 Å / Rmerge(I) obs: 0.249 / Mean I/σ(I) obs: 5.05 / % possible all: 99.7

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Processing

Software
NameVersionClassification
CNS1refinement
DENZOdata reduction
SCALEPACKdata scaling
AMoREphasing
RefinementMethod to determine structure: MOLECULAR REPLACEMENT
Starting model: 1RRK

1rrk


Resolution: 2.3→19.81 Å / Rfactor Rfree error: 0.008 / Data cutoff high absF: 219667.21 / Data cutoff low absF: 0 / Isotropic thermal model: RESTRAINED / Cross valid method: THROUGHOUT / σ(F): 0
RfactorNum. reflection% reflectionSelection details
Rfree0.245 861 2.9 %RANDOM
Rwork0.208 ---
obs0.208 29331 95.8 %-
all-30616 --
Solvent computationSolvent model: FLAT MODEL / Bsol: 46.5661 Å2 / ksol: 0.36301 e/Å3
Displacement parametersBiso mean: 31.5 Å2
Baniso -1Baniso -2Baniso -3
1-1.97 Å22.68 Å20 Å2
2--1.97 Å20 Å2
3----3.95 Å2
Refine analyze
FreeObs
Luzzati coordinate error0.31 Å0.26 Å
Luzzati d res low-5 Å
Luzzati sigma a0.3 Å0.2 Å
Refinement stepCycle: LAST / Resolution: 2.3→19.81 Å
ProteinNucleic acidLigandSolventTotal
Num. atoms3769 0 22 272 4063
Refine LS restraints
Refine-IDTypeDev idealDev ideal target
X-RAY DIFFRACTIONc_bond_d0.007
X-RAY DIFFRACTIONc_angle_deg1.3
X-RAY DIFFRACTIONc_dihedral_angle_d24.4
X-RAY DIFFRACTIONc_improper_angle_d0.8
X-RAY DIFFRACTIONc_mcbond_it1.321.5
X-RAY DIFFRACTIONc_mcangle_it2.062
X-RAY DIFFRACTIONc_scbond_it2.112
X-RAY DIFFRACTIONc_scangle_it3.082.5
LS refinement shellResolution: 2.3→2.44 Å / Rfactor Rfree error: 0.024 / Total num. of bins used: 6
RfactorNum. reflection% reflection
Rfree0.289 151 3.2 %
Rwork0.236 4549 -
obs--92.7 %
Xplor file
Refine-IDSerial noParam fileTopol file
X-RAY DIFFRACTION1PROTEIN_REP.PARAMPROTEIN.TOP
X-RAY DIFFRACTION2WATER_REP.PARAMWATER.TOP
X-RAY DIFFRACTION3ION.PARAMION.TOP

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