2RHG | pdb_00002rhg

Tryptophan synthase complexed with IGP, pH 7.0, internal aldimine

• PDB DOI: https://doi.org/10.2210/pdb2RHG/pdb

• Classification: LYASE
• Organism(s): Salmonella enterica subsp. enterica serovar Typhimurium
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2007-10-09 Released: 2007-11-20 
• Deposition Author(s): Kulik, V., Barends, T., Schlichting, I.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.00 Å
• R-Value Free: 
  0.239 (Depositor), 0.228 (DCC) 
• R-Value Work: 
  0.212 (Depositor), 0.229 (DCC) 
• R-Value Observed: 
  0.212 (Depositor) 

Literature

Tryptophan synthase complexed with IGP, pH 7.0, internal aldimine

Kulik, V., Barends, T., Schlichting, I.

To be published.

Biological Assembly 1  

Global Symmetry: Cyclic - C2  (Explore in 3D)
Global Stoichiometry: Hetero 4-mer - A2B2 

Biological assembly 1 assigned by authors and generated by PISA (software)

Macromolecule Content 

• Total Structure Weight: 72.18 kDa 
• Atom Count: 4,901 
• Modeled Residue Count: 614 
• Deposited Residue Count: 665 
• Unique protein chains: 2

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Tryptophan synthase alpha chain	A	268	Salmonella enterica subsp. enterica serovar Typhimurium	Mutation(s): 0  Gene Names: trpA EC: 4.2.1.20
UniProt
Find proteins for P00929 (Salmonella typhimurium (strain LT2 / SGSC1412 / ATCC 700720)) Explore P00929  Go to UniProtKB:  P00929

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
Tryptophan synthase beta chain	B	397	Salmonella enterica subsp. enterica serovar Typhimurium	Mutation(s): 0  Gene Names: trpB EC: 4.2.1.20
UniProt
Find proteins for P0A2K1 (Salmonella typhimurium (strain LT2 / SGSC1412 / ATCC 700720)) Explore P0A2K1  Go to UniProtKB:  P0A2K1

Small Molecules

Ligands 3 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
IGP	C [auth A]	INDOLE-3-GLYCEROL PHOSPHATE C11 H14 N O6 P NQEQTYPJSIEPHW-MNOVXSKESA-N
PLP	E [auth B]	PYRIDOXAL-5'-PHOSPHATE C8 H10 N O6 P NGVDGCNFYWLIFO-UHFFFAOYSA-N
NA	D [auth B]	SODIUM ION Na FKNQFGJONOIPTF-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.00 Å
• R-Value Free:  0.239 (Depositor), 0.228 (DCC) 
• R-Value Work:  0.212 (Depositor), 0.229 (DCC) 
• R-Value Observed: 0.212 (Depositor) 

Space Group: C 1 2 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 183.654	α = 90
b = 59.573	β = 94.71
c = 67.547	γ = 90

Software Package:

Software Name	Purpose
CNS	refinement
MAR345dtb	data collection
XDS	data reduction
XSCALE	data scaling
CNS	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 2007-11-20 
Deposition Author(s): Kulik, V., Barends, T., Schlichting, I.

Revision History  

• Version 1.0: 2007-11-20
  Type: Initial release
  
• Version 1.1: 2011-07-13
  Changes: Non-polymer description, Version format compliance
• Version 1.2: 2025-03-26
  Changes: Data collection, Database references, Derived calculations, Structure summary