4LQG

X-ray structure of human glutamate carboxypeptidase II (GCPII) in complex with a phosphoramidate inhibitor CTT1056


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.77 Å
  • R-Value Free: 0.182 
  • R-Value Work: 0.157 
  • R-Value Observed: 0.159 

wwPDB Validation   3D Report Full Report


Ligand Structure Quality Assessment 


This is version 2.0 of the entry. See complete history


Literature

Structure-Activity Relationship of (18)F-Labeled Phosphoramidate Peptidomimetic Prostate-Specific Membrane Antigen (PSMA)-Targeted Inhibitor Analogues for PET Imaging of Prostate Cancer.

Dannoon, S.Ganguly, T.Cahaya, H.Geruntho, J.J.Galliher, M.S.Beyer, S.K.Choy, C.J.Hopkins, M.R.Regan, M.Blecha, J.E.Skultetyova, L.Drake, C.R.Jivan, S.Barinka, C.Jones, E.F.Berkman, C.E.VanBrocklin, H.F.

(2016) J Med Chem 59: 5684-5694

  • DOI: 10.1021/acs.jmedchem.5b01850
  • Primary Citation of Related Structures:  
    4LQG

  • PubMed Abstract: 
  • A series of phosphoramidate-based prostate specific membrane antigen (PSMA) inhibitors of increasing lipophilicity were synthesized (4, 5, and 6), and their fluorine-18 analogs were evaluated for use as positron emission tomography (PET) imaging agents for prostate cancer ...

    A series of phosphoramidate-based prostate specific membrane antigen (PSMA) inhibitors of increasing lipophilicity were synthesized (4, 5, and 6), and their fluorine-18 analogs were evaluated for use as positron emission tomography (PET) imaging agents for prostate cancer. To gain insight into their modes of binding, they were also cocrystallized with the extracellular domain of PSMA. All analogs exhibited irreversible binding to PSMA with IC50 values ranging from 0.4 to 1.3 nM. In vitro assays showed binding and rapid internalization (80-95%, 2 h) of the radiolabeled ligands in PSMA(+) cells. In vivo distribution demonstrated significant uptake in CWR22Rv1 (PSMA(+)) tumor, with tumor to blood ratios of 25.6:1, 63.6:1, and 69.6:1 for [(18)F]4, [(18)F]5, and [(18)F]6, respectively, at 2 h postinjection. Installation of aminohexanoic acid (AH) linkers in the phosphoramidate scaffold improved their PSMA binding and inhibition and was critical for achieving suitable in vivo imaging properties, positioning [(18)F]5 and [(18)F]6 as favorable candidates for future prostate cancer imaging clinical trials.


    Organizational Affiliation

    Department of Radiology and Biomedical Imaging, University of California-San Francisco , 185 Berry Street, San Francisco, California 94107, United States.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Glutamate carboxypeptidase 2A709Homo sapiensMutation(s): 0 
Gene Names: FOLHFOLH1GIG27NAALAD1PSMPSMA
EC: 3.4.17.21
UniProt & NIH Common Fund Data Resources
Find proteins for Q04609 (Homo sapiens)
Explore Q04609 
Go to UniProtKB:  Q04609
PHAROS:  Q04609
Protein Feature View
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  • Reference Sequence
Oligosaccharides

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Entity ID: 2
MoleculeChainsChain Length2D DiagramGlycosylation3D Interactions
2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranoseB2N-Glycosylation Oligosaccharides Interaction
Glycosylation Resources
GlyTouCan:  G42666HT
GlyCosmos:  G42666HT
GlyGen:  G42666HT
Entity ID: 3
MoleculeChainsChain Length2D DiagramGlycosylation3D Interactions
2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-[alpha-L-fucopyranose-(1-6)]2-acetamido-2-deoxy-beta-D-glucopyranoseC, D3N-Glycosylation Oligosaccharides Interaction
Glycosylation Resources
GlyTouCan:  G21290RB
GlyCosmos:  G21290RB
GlyGen:  G21290RB
Entity ID: 4
MoleculeChainsChain Length2D DiagramGlycosylation3D Interactions
beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranoseE3N-Glycosylation Oligosaccharides Interaction
Glycosylation Resources
GlyTouCan:  G15407YE
GlyCosmos:  G15407YE
GlyGen:  G15407YE
Entity ID: 5
MoleculeChainsChain Length2D DiagramGlycosylation3D Interactions
alpha-D-mannopyranose-(1-3)-[alpha-D-mannopyranose-(1-6)]beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranoseF5N-Glycosylation Oligosaccharides Interaction
Glycosylation Resources
GlyTouCan:  G22768VO
GlyCosmos:  G22768VO
GlyGen:  G22768VO
Small Molecules
Ligands 5 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CTW (Subject of Investigation/LOI)
Query on CTW

Download Ideal Coordinates CCD File 
M [auth A]N-(4-fluorobenzoyl)-L-gamma-glutamyl-5-{[(S)-{[(1S)-1,3-dicarboxypropyl]amino}(hydroxy)phosphoryl]oxy}-L-norvaline
C22 H29 F N3 O13 P
RHOKGKWGPOEIFI-JYJNAYRXSA-N
 Ligand Interaction
NAG (Subject of Investigation/LOI)
Query on NAG

Download Ideal Coordinates CCD File 
K [auth A], L [auth A]2-acetamido-2-deoxy-beta-D-glucopyranose
C8 H15 N O6
OVRNDRQMDRJTHS-FMDGEEDCSA-N
 Ligand Interaction
ZN
Query on ZN

Download Ideal Coordinates CCD File 
G [auth A], H [auth A]ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
CA
Query on CA

Download Ideal Coordinates CCD File 
I [auth A]CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
CL
Query on CL

Download Ideal Coordinates CCD File 
J [auth A]CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
 Ligand Interaction
Binding Affinity Annotations 
IDSourceBinding Affinity
CTW BindingDB:  4LQG IC50: 1300 (nM) from 1 assay(s)
Biologically Interesting Molecules (External Reference) 1 Unique
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.77 Å
  • R-Value Free: 0.182 
  • R-Value Work: 0.157 
  • R-Value Observed: 0.159 
  • Space Group: I 2 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 101.9α = 90
b = 130.233β = 90
c = 158.252γ = 90
Software Package:
Software NamePurpose
MAR345dtbdata collection
REFMACrefinement
XDSdata reduction
XDSdata scaling
REFMACphasing

Structure Validation

View Full Validation Report



Ligand Structure Quality Assessment  



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2014-12-31
    Type: Initial release
  • Version 1.1: 2016-06-15
    Changes: Database references
  • Version 1.2: 2016-06-29
    Changes: Database references
  • Version 1.3: 2016-07-06
    Changes: Database references
  • Version 1.4: 2017-11-15
    Changes: Refinement description
  • Version 2.0: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Atomic model, Data collection, Database references, Derived calculations, Structure summary