4QYS

TrpB2 enzymes


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.939 Å
  • R-Value Free: 0.252 
  • R-Value Work: 0.195 

wwPDB Validation 3D Report Full Report


This is version 1.0 of the entry. See complete history

Literature

TrpB2 enzymes are O-phospho-l-serine dependent tryptophan synthases

Busch, F.Rajendran, C.Mayans, O.Loffler, P.Merkl, R.Sterner, R.

(2014) Biochemistry 53: 6078-6083

  • DOI: 10.1021/bi500977y

  • PubMed Abstract: 
  • The rapid increase of the number of sequenced genomes asks for the functional annotation of the encoded enzymes. We used a combined computational-structural approach to determine the function of the TrpB2 subgroup of the tryptophan synthase β chain/β ...

    The rapid increase of the number of sequenced genomes asks for the functional annotation of the encoded enzymes. We used a combined computational-structural approach to determine the function of the TrpB2 subgroup of the tryptophan synthase β chain/β chain-like TrpB1-TrpB2 family (IPR023026). The results showed that TrpB2 enzymes are O-phospho-l-serine dependent tryptophan synthases, whereas TrpB1 enzymes catalyze the l-serine dependent synthesis of tryptophan. We found a single residue being responsible for the different substrate specificities of TrpB1 and TrpB2 and confirmed this finding by mutagenesis studies and crystallographic analysis of a TrpB2 enzyme with bound O-phospho-l-serine.


    Organizational Affiliation

    Institute of Biophysics and Physical Biochemistry, University of Regensburg , Universitätsstrasse 31, D-93053 Regensburg, Germany.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Tryptophan synthase beta chain 2
B, A
442Saccharolobus solfataricus (strain ATCC 35092 / DSM 1617 / JCM 11322 / P2)Mutation(s): 0 
Gene Names: trpB2
EC: 4.2.1.20
Find proteins for Q97TX6 (Saccharolobus solfataricus (strain ATCC 35092 / DSM 1617 / JCM 11322 / P2))
Go to UniProtKB:  Q97TX6
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SEP
Query on SEP

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Download CCD File 
A
PHOSPHOSERINE
PHOSPHONOSERINE
C3 H8 N O6 P
BZQFBWGGLXLEPQ-REOHCLBHSA-N
 Ligand Interaction
PLP
Query on PLP

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Download CCD File 
A
PYRIDOXAL-5'-PHOSPHATE
VITAMIN B6 Phosphate
C8 H10 N O6 P
NGVDGCNFYWLIFO-UHFFFAOYSA-N
 Ligand Interaction
PLR
Query on PLR

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Download CCD File 
B
(5-HYDROXY-4,6-DIMETHYLPYRIDIN-3-YL)METHYL DIHYDROGEN PHOSPHATE
4'-DEOXYPYRIDOXINE PHOSPHATE
C8 H12 N O5 P
RBCOYOYDYNXAFA-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.939 Å
  • R-Value Free: 0.252 
  • R-Value Work: 0.195 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 55.564α = 90.00
b = 61.903β = 98.23
c = 109.574γ = 90.00
Software Package:
Software NamePurpose
PHENIXrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2015-02-18
    Type: Initial release