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Open data
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Basic information
Entry | Database: EMDB / ID: EMD-23297 | |||||||||
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Title | Trimeric human Arginase 1 in complex with mAb3 | |||||||||
![]() | Full map of 2 hARG trimers bound to 3 Mab3 molecules (only the Fab regions are visible), flipped. | |||||||||
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Function / homology | ![]() positive regulation of neutrophil mediated killing of fungus / Urea cycle / negative regulation of T-helper 2 cell cytokine production / arginase / arginase activity / arginine catabolic process to ornithine / negative regulation of type II interferon-mediated signaling pathway / urea cycle / defense response to protozoan / negative regulation of activated T cell proliferation ...positive regulation of neutrophil mediated killing of fungus / Urea cycle / negative regulation of T-helper 2 cell cytokine production / arginase / arginase activity / arginine catabolic process to ornithine / negative regulation of type II interferon-mediated signaling pathway / urea cycle / defense response to protozoan / negative regulation of activated T cell proliferation / arginine catabolic process / negative regulation of T cell proliferation / specific granule lumen / azurophil granule lumen / manganese ion binding / adaptive immune response / innate immune response / Neutrophil degranulation / extracellular space / extracellular region / nucleus / cytoplasm / cytosol Similarity search - Function | |||||||||
Biological species | ![]() | |||||||||
Method | single particle reconstruction / cryo EM / Resolution: 4.04 Å | |||||||||
![]() | Gomez-Llorente Y / Scapin G / Palte RL | |||||||||
![]() | ![]() Title: Cryo-EM structures of inhibitory antibodies complexed with arginase 1 provide insight into mechanism of action. Authors: Rachel L Palte / Veronica Juan / Yacob Gomez-Llorente / Marc Andre Bailly / Kalyan Chakravarthy / Xun Chen / Daniel Cipriano / Ghassan N Fayad / Laurence Fayadat-Dilman / Symon Gathiaka / ...Authors: Rachel L Palte / Veronica Juan / Yacob Gomez-Llorente / Marc Andre Bailly / Kalyan Chakravarthy / Xun Chen / Daniel Cipriano / Ghassan N Fayad / Laurence Fayadat-Dilman / Symon Gathiaka / Heiko Greb / Brian Hall / Mas Handa / Mark Hsieh / Esther Kofman / Heping Lin / J Richard Miller / Nhung Nguyen / Jennifer O'Neil / Hussam Shaheen / Eric Sterner / Corey Strickland / Angie Sun / Shane Taremi / Giovanna Scapin / ![]() Abstract: Human Arginase 1 (hArg1) is a metalloenzyme that catalyzes the hydrolysis of L-arginine to L-ornithine and urea, and modulates T-cell-mediated immune response. Arginase-targeted therapies have been ...Human Arginase 1 (hArg1) is a metalloenzyme that catalyzes the hydrolysis of L-arginine to L-ornithine and urea, and modulates T-cell-mediated immune response. Arginase-targeted therapies have been pursued across several disease areas including immunology, oncology, nervous system dysfunction, and cardiovascular dysfunction and diseases. Currently, all published hArg1 inhibitors are small molecules usually less than 350 Da in size. Here we report the cryo-electron microscopy structures of potent and inhibitory anti-hArg antibodies bound to hArg1 which form distinct macromolecular complexes that are greater than 650 kDa. With local resolutions of 3.5 Å or better we unambiguously mapped epitopes and paratopes for all five antibodies and determined that the antibodies act through orthosteric and allosteric mechanisms. These hArg1:antibody complexes present an alternative mechanism to inhibit hArg1 activity and highlight the ability to utilize antibodies as probes in the discovery and development of peptide and small molecule inhibitors for enzymes in general. | |||||||||
History |
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Structure visualization
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Structure viewer | EM map: ![]() ![]() ![]() |
Supplemental images |
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Downloads & links
-EMDB archive
Map data | ![]() | 118 MB | ![]() | |
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Header (meta data) | ![]() ![]() | 22.1 KB 22.1 KB | Display Display | ![]() |
FSC (resolution estimation) | ![]() | 14.7 KB | Display | ![]() |
Images | ![]() | 41.7 KB | ||
Masks | ![]() | 125 MB | ![]() | |
Others | ![]() ![]() | 115.6 MB 115.6 MB | ||
Archive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
Related structure data | ![]() 7lf1MC ![]() 7lexC ![]() 7leyC ![]() 7lezC ![]() 7lf0C ![]() 7lf2C M: atomic model generated by this map C: citing same article ( |
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Similar structure data |
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Links
EMDB pages | ![]() ![]() |
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Related items in Molecule of the Month |
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Map
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Annotation | Full map of 2 hARG trimers bound to 3 Mab3 molecules (only the Fab regions are visible), flipped. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Voxel size | X=Y=Z: 1.04 Å | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Density |
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Symmetry | Space group: 1 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Details | EMDB XML:
CCP4 map header:
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-Supplemental data
-Mask #1
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File | emd_23297_half_map_1.map | ||||||||||||
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Annotation | Half map A. | ||||||||||||
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Density Histograms |
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File | emd_23297_half_map_2.map | ||||||||||||
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Annotation | Half map B. | ||||||||||||
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Sample components
-Entire : Trimeric human arginase in complex with mAb3
Entire | Name: Trimeric human arginase in complex with mAb3 |
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Components |
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-Supramolecule #1: Trimeric human arginase in complex with mAb3
Supramolecule | Name: Trimeric human arginase in complex with mAb3 / type: complex / ID: 1 / Parent: 0 / Macromolecule list: #1-#3 Details: 2 trimers of human arginase bound to the Fab regions of 3 mAb3 molecules |
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Molecular weight | Experimental: 427 KDa |
-Supramolecule #2: Trimeric human arginase
Supramolecule | Name: Trimeric human arginase / type: complex / ID: 2 / Parent: 1 / Macromolecule list: #1 |
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Source (natural) | Organism: ![]() |
Recombinant expression | Organism: ![]() ![]() |
-Supramolecule #3: mAb3
Supramolecule | Name: mAb3 / type: complex / ID: 3 / Parent: 1 / Macromolecule list: #2-#3 |
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Source (natural) | Organism: ![]() |
Recombinant expression | Organism: ![]() ![]() |
-Macromolecule #1: Arginase-1
Macromolecule | Name: Arginase-1 / type: protein_or_peptide / ID: 1 / Number of copies: 6 / Enantiomer: LEVO / EC number: arginase |
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Source (natural) | Organism: ![]() |
Molecular weight | Theoretical: 34.779879 KDa |
Recombinant expression | Organism: ![]() ![]() |
Sequence | String: MSAKSRTIGI IGAPFSKGQP RGGVEEGPTV LRKAGLLEKL KEQECDVKDY GDLPFADIPN DSPFQIVKNP RSVGKASEQL AGKVAEVKK NGRISLVLGG DHSLAIGSIS GHARVHPDLG VIWVDAHTDI NTPLTTTSGN LHGQPVSFLL KELKGKIPDV P GFSWVTPC ...String: MSAKSRTIGI IGAPFSKGQP RGGVEEGPTV LRKAGLLEKL KEQECDVKDY GDLPFADIPN DSPFQIVKNP RSVGKASEQL AGKVAEVKK NGRISLVLGG DHSLAIGSIS GHARVHPDLG VIWVDAHTDI NTPLTTTSGN LHGQPVSFLL KELKGKIPDV P GFSWVTPC ISAKDIVYIG LRDVDPGEHY ILKTLGIKYF SMTEVDRLGI GKVMEETLSY LLGRKKRPIH LSFDVDGLDP SF TPATGTP VVGGLTYREG LYITEEIYKT GLLSGLDIME VNPSLGKTPE EVTRTVNTAV AITLACFGLA REGNHKPIDY LNP PK |
-Macromolecule #2: mAb3 heavy chain
Macromolecule | Name: mAb3 heavy chain / type: protein_or_peptide / ID: 2 / Number of copies: 6 / Enantiomer: LEVO |
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Source (natural) | Organism: ![]() |
Molecular weight | Theoretical: 49.833812 KDa |
Recombinant expression | Organism: ![]() ![]() |
Sequence | String: EVQLVQSGAE VKKPGASVKV SCKASGYTFF KYGISWVRQA PGQGLEWMGS ISPYTGETHY AQKLQGRVTM TTDTSTSTAY MELRSLRSD DTAVYYCARE GAYGYRSPYQ NWFDPWGQGT LVTVSSASTK GPSVFPLAPC SRSTSESTAA LGCLVKDYFP E PVTVSWNS ...String: EVQLVQSGAE VKKPGASVKV SCKASGYTFF KYGISWVRQA PGQGLEWMGS ISPYTGETHY AQKLQGRVTM TTDTSTSTAY MELRSLRSD DTAVYYCARE GAYGYRSPYQ NWFDPWGQGT LVTVSSASTK GPSVFPLAPC SRSTSESTAA LGCLVKDYFP E PVTVSWNS GALTSGVHTF PAVLQSSGLY SLSSVVTVPS SSLGTKTYTC NVDHKPSNTK VDKRVESKYG PPCPPCPAPE FL GGPSVFL FPPKPKDTLM ISRTPEVTCV VVDVSQEDPE VQFNWYVDGV EVHNAKTKPR EEQFNSTYRV VSVLTVLHQD WLN GKEYKC KVSNKGLPSS IEKTISKAKG QPREPQVYTL PPSQEEMTKN QVSLTCLVKG FYPSDIAVEW ESNGQPENNY KTTP PVLDS DGSFFLYSRL TVDKSRWQEG NVFSCSVMHE ALHNHYTQKS LSLSLGK |
-Macromolecule #3: mAb3 light chain
Macromolecule | Name: mAb3 light chain / type: protein_or_peptide / ID: 3 / Number of copies: 6 / Enantiomer: LEVO |
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Source (natural) | Organism: ![]() |
Molecular weight | Theoretical: 23.319938 KDa |
Recombinant expression | Organism: ![]() ![]() |
Sequence | String: EIVMTQSPAT LSLSPGERAT LSCRASQSVS SYLAWYQQKP GQAPRLLIYD ASNRATGIPA RFSGSGSGTD FTLTISSLEP EDFAVYYCQ QHSLLPRTFG GGTKVEIKRT VAAPSVFIFP PSDEQLKSGT ASVVCLLNNF YPREAKVQWK VDNALQSGNS Q ESVTEQDS ...String: EIVMTQSPAT LSLSPGERAT LSCRASQSVS SYLAWYQQKP GQAPRLLIYD ASNRATGIPA RFSGSGSGTD FTLTISSLEP EDFAVYYCQ QHSLLPRTFG GGTKVEIKRT VAAPSVFIFP PSDEQLKSGT ASVVCLLNNF YPREAKVQWK VDNALQSGNS Q ESVTEQDS KDSTYSLSST LTLSKADYEK HKVYACEVTH QGLSSPVTKS FNRGEC |
-Macromolecule #4: MANGANESE (II) ION
Macromolecule | Name: MANGANESE (II) ION / type: ligand / ID: 4 / Number of copies: 12 / Formula: MN |
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Molecular weight | Theoretical: 54.938 Da |
-Experimental details
-Structure determination
Method | cryo EM |
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![]() | single particle reconstruction |
Aggregation state | particle |
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Sample preparation
Buffer | pH: 7.4 |
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Grid | Model: Quantifoil R1.2/1.3 / Material: GOLD / Mesh: 300 / Support film - Material: GOLD / Support film - topology: HOLEY / Pretreatment - Type: PLASMA CLEANING |
Vitrification | Cryogen name: ETHANE |
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Electron microscopy
Microscope | FEI TITAN KRIOS |
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Image recording | Film or detector model: GATAN K2 SUMMIT (4k x 4k) / Detector mode: COUNTING / Digitization - Dimensions - Width: 3838 pixel / Digitization - Dimensions - Height: 3710 pixel / Number grids imaged: 1 / Number real images: 1429 / Average exposure time: 6.0 sec. / Average electron dose: 44.5 e/Å2 |
Electron beam | Acceleration voltage: 300 kV / Electron source: ![]() |
Electron optics | Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Cs: 2.7 mm / Nominal defocus max: 2.0 µm / Nominal defocus min: 1.0 µm |
Sample stage | Specimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER / Cooling holder cryogen: NITROGEN |
Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |
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Image processing
-Atomic model buiding 1
Refinement | Space: REAL / Protocol: RIGID BODY FIT |
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Output model | ![]() PDB-7lf1: |