3DD2

Crystal structure of an RNA aptamer bound to human thrombin


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.90 Å
  • R-Value Free: 0.254 
  • R-Value Work: 0.204 

wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

Crystal structure of an RNA aptamer bound to thrombin.

Long, S.B.Long, M.B.White, R.R.Sullenger, B.A.

(2008) RNA 14: 2504-2512

  • DOI: 10.1261/rna.1239308
  • Primary Citation of Related Structures:  
    3DD2

  • PubMed Abstract: 
  • Aptamers, an emerging class of therapeutics, are DNA or RNA molecules that are selected to bind molecular targets that range from small organic compounds to large proteins. All of the determined structures of aptamers in complex with small molecule targets show that aptamers cage such ligands ...

    Aptamers, an emerging class of therapeutics, are DNA or RNA molecules that are selected to bind molecular targets that range from small organic compounds to large proteins. All of the determined structures of aptamers in complex with small molecule targets show that aptamers cage such ligands. In structures of aptamers in complex with proteins that naturally bind nucleic acid, the aptamers occupy the nucleic acid binding site and often mimic the natural interactions. Here we present a crystal structure of an RNA aptamer bound to human thrombin, a protein that does not naturally bind nucleic acid, at 1.9 A resolution. The aptamer, which adheres to thrombin at the binding site for heparin, presents an extended molecular surface that is complementary to the protein. Protein recognition involves the stacking of single-stranded adenine bases at the core of the tertiary fold with arginine side chains. These results exemplify how RNA aptamers can fold into intricate conformations that allow them to interact closely with extended surfaces on non-RNA binding proteins.


    Organizational Affiliation

    Department of Surgery, Duke University Medical Center, Durham, North Carolina 27710, USA. longs@mskcc.org



Macromolecules

Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Thrombin light chainA [auth L]30Homo sapiensMutation(s): 0 
Gene Names: F2
EC: 3.4.21.5
UniProt & NIH Common Fund Data Resources
Find proteins for P00734 (Homo sapiens)
Explore P00734 
Go to UniProtKB:  P00734
PHAROS:  P00734
Protein Feature View
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Thrombin heavy chainB [auth H]258Homo sapiensMutation(s): 0 
Gene Names: F2
EC: 3.4.21.5
UniProt & NIH Common Fund Data Resources
Find proteins for P00734 (Homo sapiens)
Explore P00734 
Go to UniProtKB:  P00734
PHAROS:  P00734
Protein Feature View
Expand
  • Reference Sequence
Find similar nucleic acids by:  (by identity cutoff)  |  Structure
Entity ID: 3
MoleculeChainsLengthOrganismImage
RNA (26-MER)C [auth B]26N/A
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 5 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
0G6
Query on 0G6

Download Ideal Coordinates CCD File 
E [auth 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
P6G
Query on P6G

Download Ideal Coordinates CCD File 
G [auth H]HEXAETHYLENE GLYCOL
C12 H26 O7
IIRDTKBZINWQAW-UHFFFAOYSA-N
 Ligand Interaction
PEG
Query on PEG

Download Ideal Coordinates CCD File 
D [auth L], O [auth B], P [auth B]DI(HYDROXYETHYL)ETHER
C4 H10 O3
MTHSVFCYNBDYFN-UHFFFAOYSA-N
 Ligand Interaction
ACY
Query on ACY

Download Ideal Coordinates CCD File 
H, I [auth H], J [auth H], K [auth H], M [auth B], N [auth B]ACETIC ACID
C2 H4 O2
QTBSBXVTEAMEQO-UHFFFAOYSA-N
 Ligand Interaction
MG
Query on MG

Download Ideal Coordinates CCD File 
F [auth H], L [auth B]MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
Biologically Interesting Molecules (External Reference) 1 Unique
Entity ID: 5
IDChainsNameType/Class2D Diagram3D Interactions
PRD_000020 (0G6)
Query on PRD_000020
E [auth H]D-Phe-Pro-Arg-CH2ClPeptide-like /  Inhibitor  Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.90 Å
  • R-Value Free: 0.254 
  • R-Value Work: 0.204 
  • Space Group: P 21 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 83.766α = 90
b = 134.017β = 90
c = 44.033γ = 90
Software Package:
Software NamePurpose
CNSrefinement
PDB_EXTRACTdata extraction
DENZOdata reduction
SCALEPACKdata scaling
CNSphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2008-11-11
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Atomic model, Database references, Derived calculations, Non-polymer description, Structure summary, Version format compliance
  • Version 1.2: 2013-02-27
    Changes: Other
  • Version 1.3: 2017-10-25
    Changes: Refinement description