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- PDB-5hcd: Ternary complex of human Complement C5 with Ornithodoros moubata ... -
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Open data
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Basic information
Entry | Database: PDB / ID: 5hcd | |||||||||
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Title | Ternary complex of human Complement C5 with Ornithodoros moubata OmCI and Rhipicephalus microplus RaCI2 | |||||||||
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![]() | IMMUNE SYSTEM / Complement / Inflammation / Inhibitor / Tick | |||||||||
Function / homology | ![]() Terminal pathway of complement / membrane attack complex / Activation of C3 and C5 / negative regulation of macrophage chemotaxis / complement activation, alternative pathway / chemokine activity / endopeptidase inhibitor activity / positive regulation of vascular endothelial growth factor production / complement activation, classical pathway / positive regulation of chemokine production ...Terminal pathway of complement / membrane attack complex / Activation of C3 and C5 / negative regulation of macrophage chemotaxis / complement activation, alternative pathway / chemokine activity / endopeptidase inhibitor activity / positive regulation of vascular endothelial growth factor production / complement activation, classical pathway / positive regulation of chemokine production / Peptide ligand-binding receptors / Regulation of Complement cascade / chemotaxis / toxin activity / G alpha (i) signalling events / killing of cells of another organism / cell surface receptor signaling pathway / G protein-coupled receptor signaling pathway / inflammatory response / signaling receptor binding / extracellular space / extracellular exosome / extracellular region Similarity search - Function | |||||||||
Biological species | ![]() ![]() ![]() | |||||||||
Method | ![]() ![]() ![]() | |||||||||
![]() | Jore, M.M. / Johnson, S. / Lea, S.M. | |||||||||
Funding support | ![]() ![]()
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![]() | ![]() Title: Structural basis for therapeutic inhibition of complement C5. Authors: Matthijs M Jore / Steven Johnson / Devon Sheppard / Natalie M Barber / Yang I Li / Miles A Nunn / Hans Elmlund / Susan M Lea / ![]() ![]() Abstract: Activation of complement C5 generates the potent anaphylatoxin C5a and leads to pathogen lysis, inflammation and cell damage. The therapeutic potential of C5 inhibition has been demonstrated by ...Activation of complement C5 generates the potent anaphylatoxin C5a and leads to pathogen lysis, inflammation and cell damage. The therapeutic potential of C5 inhibition has been demonstrated by eculizumab, one of the world's most expensive drugs. However, the mechanism of C5 activation by C5 convertases remains elusive, thus limiting development of therapeutics. Here we identify and characterize a new protein family of tick-derived C5 inhibitors. Structures of C5 in complex with the new inhibitors, the phase I and phase II inhibitor OmCI, or an eculizumab Fab reveal three distinct binding sites on C5 that all prevent activation of C5. The positions of the inhibitor-binding sites and the ability of all three C5-inhibitor complexes to competitively inhibit the C5 convertase conflict with earlier steric-inhibition models, thus suggesting that a priming event is needed for activation. | |||||||||
History |
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Structure visualization
Structure viewer | Molecule: ![]() ![]() |
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Downloads & links
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Download
PDBx/mmCIF format | ![]() | 739.9 KB | Display | ![]() |
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PDB format | ![]() | 606.6 KB | Display | ![]() |
PDBx/mmJSON format | ![]() | Tree view | ![]() | |
Others | ![]() |
-Validation report
Summary document | ![]() | 764.9 KB | Display | ![]() |
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Full document | ![]() | 792.3 KB | Display | |
Data in XML | ![]() | 61.5 KB | Display | |
Data in CIF | ![]() | 83.3 KB | Display | |
Arichive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
Related structure data | ![]() 8092C ![]() 5hccC ![]() 5hceC ![]() 5iecC ![]() 2cm4S ![]() 3cu7S S: Starting model for refinement C: citing same article ( |
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Similar structure data |
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Links
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Assembly
Deposited unit | ![]()
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Unit cell |
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Components
-Protein , 4 types, 4 molecules BACD
#1: Protein | Mass: 73518.648 Da / Num. of mol.: 1 / Fragment: UNP Residues 19-674 / Source method: isolated from a natural source Details: Chains A and B are the product of a single gene that is processed into two chains that remain covalently linked via a disulphide. Source: (natural) ![]() |
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#2: Protein | Mass: 112533.906 Da / Num. of mol.: 1 / Fragment: UNP Residues 679-1676 / Source method: isolated from a natural source Details: Chains A and B are the product of a single gene that is processed into two chains that remain covalently linked via a disulphide. Source: (natural) ![]() |
#3: Protein | Mass: 18647.588 Da / Num. of mol.: 1 / Fragment: UNP residues 19-168 / Mutation: N78Q, N102Q Source method: isolated from a genetically manipulated source Details: N-terminal residues are His-tag from vector / Source: (gene. exp.) ![]() ![]() |
#4: Protein | Mass: 8659.689 Da / Num. of mol.: 1 / Fragment: UNP residues 28-81 Source method: isolated from a genetically manipulated source Details: First 3 residues are remnants of expression tag. Native mature sequence starts EEAN. Source: (gene. exp.) ![]() Plasmid: pET-M14 / Production host: ![]() ![]() |
-Sugars / Non-polymers , 2 types, 2 molecules 
#5: Polysaccharide | 2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose Source method: isolated from a genetically manipulated source |
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#6: Chemical | ChemComp-CYS / |
-Details
Has protein modification | Y |
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-Experimental details
-Experiment
Experiment | Method: ![]() |
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Sample preparation
Crystal | Density Matthews: 3.7 Å3/Da / Density % sol: 66 % |
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Crystal grow | Temperature: 294 K / Method: vapor diffusion, sitting drop / pH: 9 Details: 10% (w/v) PEG 20K, 2%(v/v)1,4 Dioxane, 0.1M Bicine pH 9.0 |
-Data collection
Diffraction | Mean temperature: 100 K |
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Diffraction source | Source: ![]() ![]() ![]() |
Detector | Type: DECTRIS PILATUS 6M-F / Detector: PIXEL / Date: May 16, 2015 |
Radiation | Protocol: SINGLE WAVELENGTH / Monochromatic (M) / Laue (L): M / Scattering type: x-ray |
Radiation wavelength | Wavelength: 0.97949 Å / Relative weight: 1 |
Reflection | Resolution: 2.98→116.57 Å / Num. obs: 64434 / % possible obs: 97 % / Redundancy: 4.6 % / Rmerge(I) obs: 0.11 / Rsym value: 0.138 / Net I/σ(I): 8.1 |
Reflection shell | Resolution: 2.98→3.16 Å / Redundancy: 4.5 % / Rmerge(I) obs: 0.89 / Mean I/σ(I) obs: 1.6 / % possible all: 96 |
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Processing
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Refinement | Method to determine structure: ![]() Starting model: 3CU7, 2CM4 Resolution: 2.98→74.544 Å / SU ML: 0.46 / Cross valid method: THROUGHOUT / σ(F): 1.33 / Phase error: 29.94 / Stereochemistry target values: ML
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Solvent computation | Shrinkage radii: 0.9 Å / VDW probe radii: 1.11 Å / Solvent model: FLAT BULK SOLVENT MODEL | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Refinement step | Cycle: LAST / Resolution: 2.98→74.544 Å
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Refine LS restraints |
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LS refinement shell |
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Refinement TLS params. | Method: refined / Refine-ID: X-RAY DIFFRACTION
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Refinement TLS group |
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