1OTA

E46Q MUTANT OF PHOTOACTIVE YELLOW PROTEIN, P63 AT 295K


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.10 Å
  • R-Value Free: 0.180 
  • R-Value Work: 0.151 
  • R-Value Observed: 0.153 

wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

Short hydrogen bonds in photoactive yellow protein.

Anderson, S.Crosson, S.Moffat, K.

(2004) Acta Crystallogr D Biol Crystallogr 60: 1008-1016

  • DOI: 10.1107/S090744490400616X
  • Primary Citation of Related Structures:  
    1OTI, 1OT9, 1OT6, 1OTE, 1OTD, 1OTB, 1OTA

  • PubMed Abstract: 
  • Eight high-resolution crystal structures of the ground state of photoactive yellow protein (PYP) solved under a variety of conditions reveal that its chromophore is stabilized by two unusually short hydrogen bonds. Both Tyr42 Oeta and Glu46 Oepsilon are separated from the chromophore phenolate oxygen by less than the sum of their atomic van der Waals radii, 2 ...

    Eight high-resolution crystal structures of the ground state of photoactive yellow protein (PYP) solved under a variety of conditions reveal that its chromophore is stabilized by two unusually short hydrogen bonds. Both Tyr42 Oeta and Glu46 Oepsilon are separated from the chromophore phenolate oxygen by less than the sum of their atomic van der Waals radii, 2.6 angstroms. This is characteristic of strong hydrogen bonding, in which hydrogen bonds acquire significant covalent character. The hydrogen bond from the protonated Glu46 to the negatively charged phenolate oxygen is 2.58 +/- 0.01 angstroms in length, while that from Tyr42 is considerably shorter, 2.49 +/- 0.01 angstroms. The E46Q mutant was solved to 0.95 angstroms resolution; the isosteric mutation increased the length of the hydrogen bond from Glx46 to the chromophore by 0.29 +/- 0.01 angstroms to that of an average hydrogen bond, 2.88 +/- 0.01 angstroms. The very short hydrogen bond from Tyr42 explains why mutating this residue has such a severe effect on the ground-state structure and PYP photocycle. The effect of isosteric mutations on the photocycle can be largely explained by the alterations to the length and strength of these hydrogen bonds.


    Organizational Affiliation

    Consortium for Advanced Radiation Sources, University of Chicago, USA. smander@midway.uchicago.edu



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Photoactive yellow proteinA125Halorhodospira halophilaMutation(s): 1 
Gene Names: pyp
UniProt
Find proteins for P16113 (Halorhodospira halophila)
Explore P16113 
Go to UniProtKB:  P16113
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
HC4
Query on HC4

Download Ideal Coordinates CCD File 
B [auth A]4'-HYDROXYCINNAMIC ACID
C9 H8 O3
NGSWKAQJJWESNS-ZZXKWVIFSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.10 Å
  • R-Value Free: 0.180 
  • R-Value Work: 0.151 
  • R-Value Observed: 0.153 
  • Space Group: P 63
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 66.917α = 90
b = 66.917β = 90
c = 41.002γ = 120
Software Package:
Software NamePurpose
SHELXL-97refinement
SCALEPACKdata scaling
CNSrefinement
DENZOdata reduction
CNSphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2004-05-11
    Type: Initial release
  • Version 1.1: 2008-04-29
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2019-07-24
    Changes: Data collection, Derived calculations, Refinement description