6GN7

X-ray structure of the complex between human alpha thrombin and NU172, a duplex/quadruplex 26-mer DNA aptamer, in the presence of sodium ions.


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.80 Å
  • R-Value Free: 0.203 
  • R-Value Work: 0.159 
  • R-Value Observed: 0.161 

wwPDB Validation 3D Report Full Report



Literature

Several structural motifs cooperate in determining the highly effective anti-thrombin activity of NU172 aptamer.

Troisi, R.Napolitano, V.Spiridonova, V.Russo Krauss, I.Sica, F.

(2018) Nucleic Acids Res 46: 12177-12185

  • DOI: 10.1093/nar/gky990
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • Despite aptamers are very promising alternative to antibodies, very few of them are under clinical trials or are used as drugs. Among them, NU172 is currently in Phase II as anticoagulant in heart disease treatments. It inhibits thrombin activity muc ...

    Despite aptamers are very promising alternative to antibodies, very few of them are under clinical trials or are used as drugs. Among them, NU172 is currently in Phase II as anticoagulant in heart disease treatments. It inhibits thrombin activity much more effectively than TBA, the best-known thrombin binding aptamer. The crystal structure of thrombin-NU172 complex reveals a bimodular duplex/quadruplex architecture for the aptamer, which binds thrombin exosite I through a highly complementary surface involving all three loops of the G-quadruplex module. Although the duplex domain does not interact directly with thrombin, the features of the duplex/quadruplex junction and the solution data on two newly designed NU172 mutants indicate that the duplex moiety is important for the optimization of the protein-ligand interaction and for the inhibition of the enzyme activity. Our work discloses the structural features determining the inhibition of thrombin by NU172 and put the basis for the design of mutants with improved properties.


    Organizational Affiliation

    Department of Chemical Sciences, University of Naples 'Federico II', Naples 80126, Italy.



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
ProthrombinL36Homo sapiensMutation(s): 0 
Gene Names: F2
EC: 3.4.21.5
Find proteins for P00734 (Homo sapiens)
Explore P00734 
Go to UniProtKB:  P00734
NIH Common Fund Data Resources
PHAROS  P00734
Protein Feature View
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  • Reference Sequence

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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
ProthrombinH259Homo sapiensMutation(s): 0 
Gene Names: F2
EC: 3.4.21.5
Find proteins for P00734 (Homo sapiens)
Explore P00734 
Go to UniProtKB:  P00734
NIH Common Fund Data Resources
PHAROS  P00734
Protein Feature View
 ( Mouse scroll to zoom / Hold left click to move )
  • Reference Sequence

Find similar nucleic acids by: Sequence  |  Structure

Entity ID: 3
MoleculeChainsLengthOrganism
NU172, DNA (26-MER)E26synthetic construct
Oligosaccharides
Entity ID: 4
MoleculeChainsChain Length2D Diagram Glycosylation
N-acetyl-alpha-neuraminic acid-(2-6)-beta-D-galactopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-2)-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-glucopyranose
A
7 N-Glycosylation
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
0G6
Query on 0G6

Download CCD File 
H
D-phenylalanyl-N-[(2S,3S)-6-{[amino(iminio)methyl]amino}-1-chloro-2-hydroxyhexan-3-yl]-L-prolinamide
C21 H34 Cl N6 O3
DVFLYEYCMMLBTQ-VSZNYVQBSA-O
 Ligand Interaction
GOL
Query on GOL

Download CCD File 
E
GLYCEROL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
NA
Query on NA

Download CCD File 
E, H
SODIUM ION
Na
FKNQFGJONOIPTF-UHFFFAOYSA-N
 Ligand Interaction
Biologically Interesting Molecules 1 Unique
IDChainsNameType/Class2D Diagram3D Interactions
PRD_000020 (0G6)
Query on PRD_000020
HD-Phe-Pro-Arg-CH2ClP /  Inhibitor

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Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.80 Å
  • R-Value Free: 0.203 
  • R-Value Work: 0.159 
  • R-Value Observed: 0.161 
  • Space Group: I 2 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 67.33α = 90
b = 120.69β = 90
c = 208.94γ = 90
Software Package:
Software NamePurpose
MOSFLMdata reduction
Aimlessdata scaling
PHASERphasing
REFMACrefinement
PDB_EXTRACTdata extraction

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2018-10-17
    Type: Initial release
  • Version 1.1: 2018-10-24
    Changes: Advisory, Data collection, Database references
  • Version 1.2: 2018-11-07
    Changes: Data collection, Database references
  • Version 1.3: 2018-12-26
    Changes: Data collection, Database references
  • Version 1.4: 2019-03-27
    Changes: Data collection, Derived calculations, Structure summary
  • Version 2.0: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Advisory, Atomic model, Data collection, Derived calculations, Structure summary