2ZMI

Crystal Structure of Rat Vitamin D Receptor Bound to Adamantyl Vitamin D Analogs: Structural Basis for Vitamin D Receptor Antagonism and/or Partial Agonism


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.70 Å
  • R-Value Free: 0.222 
  • R-Value Work: 0.212 
  • R-Value Observed: 0.212 

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Literature

Crystal structures of rat vitamin d receptor bound to adamantyl vitamin d analogs: structural basis for vitamin d receptor antagonism and partial agonism

Nakabayashi, M.Yamada, S.Yoshimoto, N.Tanaka, T.Igarashi, M.Ikura, T.Ito, N.Makishima, M.Tokiwa, H.DeLuca, H.F.Shimizu, M.

(2008) J Med Chem 51: 5320-5329

  • DOI: https://doi.org/10.1021/jm8004477
  • Primary Citation of Related Structures:  
    2ZMH, 2ZMI, 2ZMJ

  • PubMed Abstract: 

    The X-ray crystal structures of the rat VDR ligand-binding domain complexed with 19-norvitamin D compounds that contain an adamantyl substituent at the side-chain terminus, 2a (ADTT), 2b (ADNY), and 2c (ADMI4) and a coactivator peptide derived from DRIP205 are reported. These compounds show a series of partial agonistic (10-75% efficacy)/antagonistic activities. All of these complexed receptors are crystallized in the canonical active conformation, regardless of their activity profiles. The bulky adamantyl side chain does not crowd helix 12 but protrudes into the gap formed by helix 11, loop 11-12, helix 3, and loop 6-7, thereby widening the ligand binding pocket. We suggest that these structural changes destabilize the active protein conformation and reduce its contribution to equilibrium among the active and inactive conformations. The coactivator peptide traps the minor active conformation, and the equilibrium shifts to the active conformation. As a result, these ligands show partial agonistic activities.


  • Organizational Affiliation

    School of Biomedical Science and Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University, 2-3-10 Kanda-Surugadai, Chiyoda-ku, Tokyo 101-0062.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Vitamin D3 receptor271Rattus norvegicusMutation(s): 0 
Gene Names: VdrNr1i1
UniProt
Find proteins for P13053 (Rattus norvegicus)
Explore P13053 
Go to UniProtKB:  P13053
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP13053
Sequence Annotations
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  • Reference Sequence

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Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
Mediator of RNA polymerase II transcription subunit 1B [auth C]13N/AMutation(s): 0 
UniProt
Find proteins for A1L0Z0 (Xenopus tropicalis)
Explore A1L0Z0 
Go to UniProtKB:  A1L0Z0
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupA1L0Z0
Sequence Annotations
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  • Reference Sequence
Small Molecules
Ligands 3 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
TT2
Query on TT2

Download Ideal Coordinates CCD File 
C [auth A](1R,3R,7E,17beta)-17-{(1S,2E,5R)-5-hydroxy-1-methyl-5-[(3S,5S,7S)-tricyclo[3.3.1.1~3,7~]dec-1-yl]pent-2-en-1-yl}-2-methylidene-9,10-secoestra-5,7-diene-1,3-diol
C35 H52 O3
MOSWJCBKXGNCIG-HBOJQGNGSA-N
EDO
Query on EDO

Download Ideal Coordinates CCD File 
D [auth A]1,2-ETHANEDIOL
C2 H6 O2
LYCAIKOWRPUZTN-UHFFFAOYSA-N
FMT
Query on FMT

Download Ideal Coordinates CCD File 
E [auth A]FORMIC ACID
C H2 O2
BDAGIHXWWSANSR-UHFFFAOYSA-N
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.70 Å
  • R-Value Free: 0.222 
  • R-Value Work: 0.212 
  • R-Value Observed: 0.212 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 155.222α = 90
b = 42.412β = 95.21
c = 41.955γ = 90
Software Package:
Software NamePurpose
CNSrefinement
HKL-2000data collection
HKL-2000data reduction
HKL-2000data scaling
CNSphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2008-09-02
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance
  • Version 1.2: 2024-03-13
    Changes: Data collection, Database references, Derived calculations