4IQC

P3121 crystal form of FKBP12.6


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.903 Å
  • R-Value Free: 0.222 
  • R-Value Work: 0.195 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Crystal structure and conformational flexibility of the unligated FK506-binding protein FKBP12.6.

Chen, H.Mustafi, S.M.LeMaster, D.M.Li, Z.Heroux, A.Li, H.Hernandez, G.

(2014) Acta Crystallogr.,Sect.D 70: 636-646

  • DOI: 10.1107/S1399004713032112
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • The primary known physiological function of FKBP12.6 involves its role in regulating the RyR2 isoform of ryanodine receptor Ca(2+) channels in cardiac muscle, pancreatic β islets and the central nervous system. With only a single previously reported ...

    The primary known physiological function of FKBP12.6 involves its role in regulating the RyR2 isoform of ryanodine receptor Ca(2+) channels in cardiac muscle, pancreatic β islets and the central nervous system. With only a single previously reported X-ray structure of FKBP12.6, bound to the immunosuppressant rapamycin, structural inferences for this protein have been drawn from the more extensive studies of the homologous FKBP12. X-ray structures at 1.70 and 1.90 Å resolution from P2₁ and P3₁21 crystal forms are reported for an unligated cysteine-free variant of FKBP12.6 which exhibit a notable diversity of conformations. In one monomer from the P3₁21 crystal form, the aromatic ring of Phe59 at the base of the active site is rotated perpendicular to its typical orientation, generating a steric conflict for the immunosuppressant-binding mode. The peptide unit linking Gly89 and Val90 at the tip of the protein-recognition `80s loop' is flipped in the P2₁ crystal form. Unlike the >30 reported FKBP12 structures, the backbone conformation of this loop closely follows that of the first FKBP domain of FKBP51. The NMR resonances for 21 backbone amides of FKBP12.6 are doubled, corresponding to a slow conformational transition centered near the tip of the 80s loop, as recently reported for 31 amides of FKBP12. The comparative absence of doubling for residues along the opposite face of the active-site pocket in FKBP12.6 may in part reflect attenuated structural coupling owing to increased conformational plasticity around the Phe59 ring.


    Organizational Affiliation

    Wadsworth Center, New York State Department of Health, Empire State Plaza, Albany, NY 12201, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Peptidyl-prolyl cis-trans isomerase FKBP1B
A, B
107Homo sapiensMutation(s): 2 
Gene Names: FKBP1B (FKBP12.6, FKBP1L, FKBP9, OTK4)
EC: 5.2.1.8
Find proteins for P68106 (Homo sapiens)
Go to Gene View: FKBP1B
Go to UniProtKB:  P68106
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.903 Å
  • R-Value Free: 0.222 
  • R-Value Work: 0.195 
  • Space Group: P 31 2 1
Unit Cell:
Length (Å)Angle (°)
a = 52.816α = 90.00
b = 52.816β = 90.00
c = 152.949γ = 120.00
Software Package:
Software NamePurpose
HKL-2000data collection
HKL-2000data reduction
PHENIXphasing
HKL-2000data scaling
PHENIXrefinement
PHENIXmodel building

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2014-01-15
    Type: Initial release
  • Version 1.1: 2014-03-12
    Type: Database references
  • Version 1.2: 2014-09-24
    Type: Database references