1Z28

Crystal Structures of SULT1A2 and SULT1A1*3: Implications in the bioactivation of N-hydroxy-2-acetylamino fluorine (OH-AAF)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.3 Å
  • R-Value Free: 0.231 
  • R-Value Work: 0.193 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Crystal structures of SULT1A2 and SULT1A1 *3: insights into the substrate inhibition and the role of Tyr149 in SULT1A2.

Lu, J.Li, H.Zhang, J.Li, M.Liu, M.Y.An, X.Liu, M.C.Chang, W.

(2010) Biochem.Biophys.Res.Commun. 396: 429-434

  • DOI: 10.1016/j.bbrc.2010.04.109
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • The cytosolic sulfotransferases (SULTs) in vertebrates catalyze the sulfonation of endogenous thyroid/steroid hormones and catecholamine neurotransmitters, as well as a variety of xenobiotics, using 3'-phosphoadenosine 5'-phosphosulfate (PAPS) as the ...

    The cytosolic sulfotransferases (SULTs) in vertebrates catalyze the sulfonation of endogenous thyroid/steroid hormones and catecholamine neurotransmitters, as well as a variety of xenobiotics, using 3'-phosphoadenosine 5'-phosphosulfate (PAPS) as the sulfonate donor. In this study, we determined the structures of SULT1A2 and an allozyme of SULT1A1, SULT1A1 *3, bound with 3'-phosphoadenosine 5'-phosphate (PAP), at 2.4 and 2.3A resolution, respectively. The conformational differences between the two structures revealed a plastic substrate-binding pocket with two channels and a switch-like substrate selectivity residue Phe247, providing clearly a structural basis for the substrate inhibition. In SULT1A2, Tyr149 extends approximately 2.1A further to the inside of the substrate-binding pocket, compared with the corresponding His149 residue in SULT1A1 *3. Site-directed mutagenesis study showed that, compared with the wild-type SULT1A2, mutant Tyr149Phe SULT1A2 exhibited a 40 times higher K(m) and two times lower V(max) with p-nitrophenol as substrate. These latter data imply a significant role of Tyr149 in the catalytic mechanism of SULT1A2.


    Organizational Affiliation

    National Laboratory of Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, 15 Datun Road, Chaoyang District, Beijing 100101, People's Republic of China.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Phenol-sulfating phenol sulfotransferase 1
A
295Homo sapiensMutation(s): 0 
Gene Names: SULT1A1 (STP, STP1)
EC: 2.8.2.1
Find proteins for P50225 (Homo sapiens)
Go to Gene View: SULT1A1
Go to UniProtKB:  P50225
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
A3P
Query on A3P

Download SDF File 
Download CCD File 
A
ADENOSINE-3'-5'-DIPHOSPHATE
C10 H15 N5 O10 P2
WHTCPDAXWFLDIH-KQYNXXCUSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.3 Å
  • R-Value Free: 0.231 
  • R-Value Work: 0.193 
  • Space Group: P 21 21 2
Unit Cell:
Length (Å)Angle (°)
a = 72.240α = 90.00
b = 122.530β = 90.00
c = 43.820γ = 90.00
Software Package:
Software NamePurpose
MAR345data collection
CNSrefinement
AMoREphasing
SCALEPACKdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2006-05-30
    Type: Initial release
  • Version 1.1: 2008-04-30
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance
  • Version 1.3: 2017-10-11
    Type: Refinement description