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- PDB-2a73: Human Complement Component C3 -

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Basic information

Entry
Database: PDB / ID: 2a73
TitleHuman Complement Component C3
Components(Complement C3) x 2
KeywordsIMMUNE SYSTEM / INTACT THIOESTER
Function / homology
Function and homology information


C5L2 anaphylatoxin chemotactic receptor binding / oviduct epithelium development / regulation of triglyceride biosynthetic process / positive regulation of activation of membrane attack complex / vertebrate eye-specific patterning / positive regulation of apoptotic cell clearance / complement-mediated synapse pruning / Alternative complement activation / positive regulation of lipid storage / positive regulation of phagocytosis, engulfment ...C5L2 anaphylatoxin chemotactic receptor binding / oviduct epithelium development / regulation of triglyceride biosynthetic process / positive regulation of activation of membrane attack complex / vertebrate eye-specific patterning / positive regulation of apoptotic cell clearance / complement-mediated synapse pruning / Alternative complement activation / positive regulation of lipid storage / positive regulation of phagocytosis, engulfment / positive regulation of G protein-coupled receptor signaling pathway / Activation of C3 and C5 / complement receptor mediated signaling pathway / positive regulation of type IIa hypersensitivity / positive regulation of D-glucose transmembrane transport / complement-dependent cytotoxicity / complement activation / complement activation, alternative pathway / endopeptidase inhibitor activity / neuron remodeling / B cell activation / amyloid-beta clearance / positive regulation of vascular endothelial growth factor production / Purinergic signaling in leishmaniasis infection / complement activation, classical pathway / Peptide ligand-binding receptors / Regulation of Complement cascade / fatty acid metabolic process / Post-translational protein phosphorylation / response to bacterium / positive regulation of receptor-mediated endocytosis / Regulation of Insulin-like Growth Factor (IGF) transport and uptake by Insulin-like Growth Factor Binding Proteins (IGFBPs) / positive regulation of angiogenesis / Immunoregulatory interactions between a Lymphoid and a non-Lymphoid cell / azurophil granule lumen / G alpha (i) signalling events / secretory granule lumen / blood microparticle / receptor ligand activity / inflammatory response / immune response / positive regulation of protein phosphorylation / G protein-coupled receptor signaling pathway / endoplasmic reticulum lumen / signaling receptor binding / Neutrophil degranulation / cell surface / signal transduction / protein-containing complex / extracellular space / extracellular exosome / extracellular region / plasma membrane
Similarity search - Function
Jelly Rolls - #1540 / Anaphylotoxins (complement system) / N-terminal domain of TfIIb - #160 / S-adenosyl-L-methionine-dependent methyltransferases - #20 / Immunoglobulin-like - #1940 / Alpha-macroglobulin, receptor-binding domain / Macroglobulin (MG2) domain / Influenza Virus Matrix Protein; Chain A, domain 1 / S-adenosyl-L-methionine-dependent methyltransferases / OB fold (Dihydrolipoamide Acetyltransferase, E2P) - #120 ...Jelly Rolls - #1540 / Anaphylotoxins (complement system) / N-terminal domain of TfIIb - #160 / S-adenosyl-L-methionine-dependent methyltransferases - #20 / Immunoglobulin-like - #1940 / Alpha-macroglobulin, receptor-binding domain / Macroglobulin (MG2) domain / Influenza Virus Matrix Protein; Chain A, domain 1 / S-adenosyl-L-methionine-dependent methyltransferases / OB fold (Dihydrolipoamide Acetyltransferase, E2P) - #120 / N-terminal domain of TfIIb / : / : / Complement component 3, CUB domain, second segment / Complement component 3, CUB domain, first segment / Complement C3-like, NTR domain / Alpha-2-macroglobulin, conserved site / Alpha-2-macroglobulin family thiolester region signature. / Complement C3/4/5, macroglobulin domain MG1 / Macroglobulin domain MG1 / : / Alpha-macro-globulin thiol-ester bond-forming region / Anaphylatoxin, complement system domain / Anaphylatoxin domain signature. / Anaphylatoxin, complement system / Anaphylatoxin/fibulin / Anaphylotoxin-like domain / Anaphylatoxin domain profile. / Anaphylatoxin homologous domain / Netrin C-terminal Domain / Netrin module, non-TIMP type / UNC-6/NTR/C345C module / Glycosyltransferase - #20 / : / Alpha-macroglobulin, receptor-binding / Alpha-macroglobulin, receptor-binding domain superfamily / Macroglobulin domain MG4 / Macroglobulin domain MG3 / A-macroglobulin receptor binding domain / Macroglobulin domain MG4 / Macroglobulin domain MG3 / A-macroglobulin receptor / Netrin domain / NTR domain profile. / Alpha-2-macroglobulin / Macroglobulin domain / Alpha-2-macroglobulin, bait region domain / Alpha-macroglobulin-like, TED domain / Alpha-2-macroglobulin family / MG2 domain / A-macroglobulin TED domain / Alpha-2-macroglobulin bait region domain / Alpha-2-Macroglobulin / Alpha-2-macroglobulin family / Tissue inhibitor of metalloproteinases-like, OB-fold / Other non-globular / Terpenoid cyclases/protein prenyltransferase alpha-alpha toroid / Glycosyltransferase / Alpha/alpha barrel / Single Sheet / Special / OB fold (Dihydrolipoamide Acetyltransferase, E2P) / Jelly Rolls / Immunoglobulins / Immunoglobulin-like fold / Up-down Bundle / Immunoglobulin-like / Beta Barrel / Sandwich / Mainly Beta / Mainly Alpha
Similarity search - Domain/homology
Biological speciesHomo sapiens (human)
MethodX-RAY DIFFRACTION / SYNCHROTRON / MOLECULAR REPLACEMENT / Resolution: 3.3 Å
AuthorsJanssen, B.J.C. / Huizinga, E.G. / Raaijmakers, H.C.A. / Roos, A. / Daha, M.R. / Nilsson-Ekdahl, K. / Nilsson, B. / Gros, P.
CitationJournal: Nature / Year: 2005
Title: Structures of complement component C3 provide insights into the function and evolution of immunity.
Authors: Janssen, B.J. / Huizinga, E.G. / Raaijmakers, H.C. / Roos, A. / Daha, M.R. / Nilsson-Ekdahl, K. / Nilsson, B. / Gros, P.
History
DepositionJul 4, 2005Deposition site: RCSB / Processing site: RCSB
Revision 1.0Sep 27, 2005Provider: repository / Type: Initial release
Revision 1.1Apr 30, 2008Group: Version format compliance
Revision 1.2Jul 13, 2011Group: Advisory / Version format compliance
Revision 2.0Jul 29, 2020Group: Advisory / Atomic model ...Advisory / Atomic model / Data collection / Derived calculations / Structure summary
Category: atom_site / chem_comp ...atom_site / chem_comp / database_PDB_caveat / entity / pdbx_branch_scheme / pdbx_chem_comp_identifier / pdbx_entity_branch / pdbx_entity_branch_descriptor / pdbx_entity_branch_link / pdbx_entity_branch_list / pdbx_entity_nonpoly / pdbx_nonpoly_scheme / pdbx_struct_assembly_gen / pdbx_validate_chiral / pdbx_validate_close_contact / struct_asym / struct_conn / struct_site / struct_site_gen
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_asym_id / _atom_site.auth_comp_id / _atom_site.auth_seq_id / _atom_site.label_asym_id / _atom_site.label_comp_id / _atom_site.label_entity_id / _chem_comp.name / _chem_comp.type / _pdbx_struct_assembly_gen.asym_id_list / _pdbx_validate_chiral.auth_asym_id / _pdbx_validate_chiral.auth_seq_id
Description: Carbohydrate remediation / Provider: repository / Type: Remediation
Revision 2.1Aug 23, 2023Group: Data collection / Database references ...Data collection / Database references / Refinement description / Structure summary
Category: chem_comp / chem_comp_atom ...chem_comp / chem_comp_atom / chem_comp_bond / database_2 / pdbx_initial_refinement_model
Item: _chem_comp.pdbx_synonyms / _database_2.pdbx_DOI / _database_2.pdbx_database_accession
Revision 2.2Oct 30, 2024Group: Structure summary / Category: pdbx_entry_details / pdbx_modification_feature
Remark 600HETEROGEN CLOSE CONTACTS PRESENT BETWEEN NAG N2 AND MAN N3; POSSIBLY MAN N3, MAN N4 AND MAN N5 ARE ...HETEROGEN CLOSE CONTACTS PRESENT BETWEEN NAG N2 AND MAN N3; POSSIBLY MAN N3, MAN N4 AND MAN N5 ARE ROTATED 180 DEGREES

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

Downloads & links

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Assembly

Deposited unit
A: Complement C3
B: Complement C3
hetero molecules


Theoretical massNumber of molelcules
Total (without water)185,6854
Polymers184,3502
Non-polymers1,3352
Water00
1


  • Idetical with deposited unit
  • defined by author&software
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
Buried area11080 Å2
ΔGint-41 kcal/mol
Surface area73130 Å2
MethodPISA
Unit cell
Length a, b, c (Å)116.980, 156.260, 271.200
Angle α, β, γ (deg.)90.00, 90.00, 90.00
Int Tables number23
Space group name H-MI222

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Components

#1: Protein Complement C3


Mass: 71267.203 Da / Num. of mol.: 1 / Fragment: residue 1-645 / Source method: isolated from a natural source / Details: serum / Source: (natural) Homo sapiens (human) / References: UniProt: P01024
#2: Protein Complement C3


Mass: 113082.797 Da / Num. of mol.: 1 / Fragment: residue 650-1663 / Source method: isolated from a natural source / Details: serum / Source: (natural) Homo sapiens (human) / References: UniProt: P01024
#3: Polysaccharide 2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose


Type: oligosaccharide / Mass: 424.401 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
DescriptorTypeProgram
DGlcpNAcb1-4DGlcpNAcb1-Glycam Condensed SequenceGMML 1.0
WURCS=2.0/1,2,1/[a2122h-1b_1-5_2*NCC/3=O]/1-1/a4-b1WURCSPDB2Glycan 1.1.0
[]{[(4+1)][b-D-GlcpNAc]{[(4+1)][b-D-GlcpNAc]{}}}LINUCSPDB-CARE
#4: Polysaccharide alpha-D-mannopyranose-(1-3)-[beta-D-mannopyranose-(1-6)]alpha-D-mannopyranose-(1-4)-2-acetamido-2- ...alpha-D-mannopyranose-(1-3)-[beta-D-mannopyranose-(1-6)]alpha-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose


Type: oligosaccharide / Mass: 910.823 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
DescriptorTypeProgram
DManpa1-3[DManpb1-6]DManpa1-4DGlcpNAcb1-4DGlcpNAcb1-Glycam Condensed SequenceGMML 1.0
WURCS=2.0/3,5,4/[a2122h-1b_1-5_2*NCC/3=O][a1122h-1a_1-5][a1122h-1b_1-5]/1-1-2-2-3/a4-b1_b4-c1_c3-d1_c6-e1WURCSPDB2Glycan 1.1.0
[]{[(4+1)][b-D-GlcpNAc]{[(4+1)][b-D-GlcpNAc]{[(4+1)][b-D-Manp]{[(3+1)][b-D-Manp]{}[(6+1)][b-D-Manp]{}}}}}LINUCSPDB-CARE
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: 3.27 Å3/Da / Density % sol: 62.4 %
Crystal growTemperature: 293 K / Method: vapor diffusion, hanging drop / pH: 6.2
Details: PEG 550 MME, sodium acetate, pH 6.2, VAPOR DIFFUSION, HANGING DROP, temperature 293K

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Data collection

DiffractionMean temperature: 100 K
Diffraction sourceSource: SYNCHROTRON / Site: ESRF / Beamline: ID14-4 / Wavelength: 0.9393 Å
DetectorType: ADSC QUANTUM 4 / Detector: CCD / Date: Feb 12, 2005
RadiationProtocol: SINGLE WAVELENGTH / Monochromatic (M) / Laue (L): M / Scattering type: x-ray
Radiation wavelengthWavelength: 0.9393 Å / Relative weight: 1
ReflectionResolution: 3.3→39.12 Å / Num. all: 37932 / Num. obs: 37818 / % possible obs: 99.7 % / Observed criterion σ(F): -999 / Observed criterion σ(I): -3.7 / Redundancy: 4.5 % / Rmerge(I) obs: 0.081 / Net I/σ(I): 10.7
Reflection shellResolution: 3.3→3.5 Å / Redundancy: 4.5 % / Rmerge(I) obs: 0.433 / Mean I/σ(I) obs: 2.3 / % possible all: 99.2

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Processing

Software
NameVersionClassificationNB
REFMAC5.2.0003refinement
PDB_EXTRACT1.7data extraction
XDSdata reduction
XSCALEdata scaling
PHASERphasing
RefinementMethod to determine structure: MOLECULAR REPLACEMENT
Starting model: PDB ENTRY 1C3D and structure of C3c

1c3d


Resolution: 3.3→40 Å / Cor.coef. Fo:Fc: 0.91 / Cor.coef. Fo:Fc free: 0.853 / SU B: 66.453 / SU ML: 0.494 / TLS residual ADP flag: LIKELY RESIDUAL / Cross valid method: THROUGHOUT / ESU R Free: 0.583 / Stereochemistry target values: MAXIMUM LIKELIHOOD / Details: HYDROGENS HAVE BEEN ADDED IN THE RIDING POSITIONS
RfactorNum. reflection% reflectionSelection details
Rfree0.28943 1882 5 %RANDOM
Rwork0.23005 ---
obs0.23302 35817 99.77 %-
all-37932 --
Solvent computationIon probe radii: 0.8 Å / Shrinkage radii: 0.8 Å / VDW probe radii: 1.2 Å / Solvent model: MASK
Displacement parametersBiso mean: 94.4 Å2
Baniso -1Baniso -2Baniso -3
1-2.3 Å20 Å20 Å2
2---0.03 Å20 Å2
3----2.27 Å2
Refinement stepCycle: LAST / Resolution: 3.3→40 Å
ProteinNucleic acidLigandSolventTotal
Num. atoms12771 0 89 0 12860
Refine LS restraints
Refine-IDTypeDev idealDev ideal targetNumber
X-RAY DIFFRACTIONr_bond_refined_d0.0020.02213132
X-RAY DIFFRACTIONr_bond_other_d
X-RAY DIFFRACTIONr_angle_refined_deg0.5281.96317810
X-RAY DIFFRACTIONr_angle_other_deg
X-RAY DIFFRACTIONr_dihedral_angle_1_deg6.59651605
X-RAY DIFFRACTIONr_dihedral_angle_2_deg38.9324.756595
X-RAY DIFFRACTIONr_dihedral_angle_3_deg20.345152342
X-RAY DIFFRACTIONr_dihedral_angle_4_deg16.1271576
X-RAY DIFFRACTIONr_chiral_restr0.0350.22031
X-RAY DIFFRACTIONr_gen_planes_refined0.0030.029777
X-RAY DIFFRACTIONr_gen_planes_other
X-RAY DIFFRACTIONr_nbd_refined0.2150.25942
X-RAY DIFFRACTIONr_nbd_other
X-RAY DIFFRACTIONr_nbtor_refined0.3160.28931
X-RAY DIFFRACTIONr_nbtor_other
X-RAY DIFFRACTIONr_xyhbond_nbd_refined0.1510.2352
X-RAY DIFFRACTIONr_xyhbond_nbd_other
X-RAY DIFFRACTIONr_metal_ion_refined
X-RAY DIFFRACTIONr_metal_ion_other
X-RAY DIFFRACTIONr_symmetry_vdw_refined0.1310.252
X-RAY DIFFRACTIONr_symmetry_vdw_other
X-RAY DIFFRACTIONr_symmetry_hbond_refined0.1260.24
X-RAY DIFFRACTIONr_symmetry_hbond_other
X-RAY DIFFRACTIONr_symmetry_metal_ion_refined
X-RAY DIFFRACTIONr_symmetry_metal_ion_other
X-RAY DIFFRACTIONr_mcbond_it0.3051.58173
X-RAY DIFFRACTIONr_mcbond_other
X-RAY DIFFRACTIONr_mcangle_it0.561213073
X-RAY DIFFRACTIONr_scbond_it0.57835448
X-RAY DIFFRACTIONr_scangle_it1.064.54735
X-RAY DIFFRACTIONr_rigid_bond_restr
X-RAY DIFFRACTIONr_sphericity_free
X-RAY DIFFRACTIONr_sphericity_bonded
LS refinement shellResolution: 3.3→3.385 Å / Total num. of bins used: 20
RfactorNum. reflection% reflection
Rfree0.35 131 -
Rwork0.274 2589 -
obs--98.95 %
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)
10.7386-0.0536-0.12491.15840.18141.0739-0.04340.1879-0.0244-0.1880.0389-0.08980.0503-0.04240.0044-0.4759-0.0435-0.0228-0.35360.0362-0.3078-44.9389-45.0533-78.7936
28.60033.4548-4.845413.3247-4.222616.2132-0.1328-0.00180.8101-0.62540.5089-0.2183-0.5090.3012-0.376100.00010.0002000.0003-29.0716-15.918-127.7477
Refinement TLS group
IDRefine-IDRefine TLS-IDAuth asym-IDLabel asym-IDAuth seq-IDLabel seq-ID
1X-RAY DIFFRACTION1AA105 - 601105 - 601
2X-RAY DIFFRACTION1BB651 - 16411 - 991
3X-RAY DIFFRACTION1BC1 - 51 - 5
4X-RAY DIFFRACTION2AA1 - 1041 - 104
5X-RAY DIFFRACTION2AA602 - 643602 - 643
6X-RAY DIFFRACTION2AD644 - 6451 - 2

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