4LI3

Crystal Structure of O-Acetylserine Sulfhydrylase from Haemophilus influenzae in complex with high affinity inhibitory peptide from Serine acetyl transferase of Salmonella typhimurium

• PDB DOI: https://doi.org/10.2210/pdb4LI3/pdb

• Classification: TRANSFERASE/TRANSFERASE INHIBITOR
• Organism(s): Haemophilus influenzae, Salmonella enterica subsp. enterica serovar Typhimurium str. UK-1
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2013-07-02 Released: 2014-07-09 
• Deposition Author(s): Singh, A.K., Ekka, M.K., Kaushik, A., Kumaran, S.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.59 Å
• R-Value Free: 0.248 
• R-Value Work: 0.197 
• R-Value Observed: 0.200 

Literature

Crystal Structure of O-Acetylserine Sulfhydrylase from Haemophilus influenzae in complex with high affinity inhibitory peptide from Serine acetyl transferase of Salmonella typhimurium

Singh, A.K., Ekka, M.K., Kaushik, A., Kumaran, S.

To be published.

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 2-mer - A1B1 

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

Macromolecule Content

• Total Structure Weight: 34.64 kDa 
• Atom Count: 2,369 
• Modelled Residue Count: 319 
• Deposited Residue Count: 324 
• Unique protein chains: 2

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Cysteine synthase	A [auth X]	316	Haemophilus influenzae	Mutation(s): 0  Gene Names: cysK, HI_1103 EC: 2.5.1.47
UniProt
Find proteins for P45040 (Haemophilus influenzae (strain ATCC 51907 / DSM 11121 / KW20 / Rd)) Explore P45040  Go to UniProtKB:  P45040

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
Serine acetyltransferase	B [auth A]	8	Salmonella enterica subsp. enterica serovar Typhimurium str. UK-1	Mutation(s): 0
UniProt
Find proteins for P29847 (Salmonella typhimurium (strain LT2 / SGSC1412 / ATCC 700720)) Explore P29847  Go to UniProtKB:  P29847

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
GOL	C [auth X]	GLYCEROL C3 H8 O3 PEDCQBHIVMGVHV-UHFFFAOYSA-N

Modified Residues  1 Unique
ID	Chains	Type	Formula	2D Diagram	Parent
LLP	A [auth X]	L-PEPTIDE LINKING	C14 H22 N3 O7 P		LYS

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.59 Å
• R-Value Free: 0.248 
• R-Value Work: 0.197 
• R-Value Observed: 0.200 
• Space Group: I 4₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 112.655	α = 90
b = 112.655	β = 90
c = 46.535	γ = 90

Software Package:

Software Name	Purpose
MAR345dtb	data collection
PHASER	phasing
PHENIX	refinement
HKL-2000	data reduction
HKL-2000	data scaling

Structure Validation

Entry History 

Deposition Data

• Released Date: 2014-07-09 
Deposition Author(s): Singh, A.K., Ekka, M.K., Kaushik, A., Kumaran, S.

Revision History  

• Version 1.0: 2014-07-09
  Type: Initial release
  
• Version 1.1: 2023-11-08
  Changes: Data collection, Database references, Derived calculations, Refinement description
• Version 1.2: 2023-12-06
  Changes: Data collection