4NU8 | pdb_00004nu8

Crystal structure of O-acetylserine sulfhydrylase from Haemophilus influenzae in complex with high affinity inhibitory peptide from serine acetyl transferase of Salmonella typhimurium at 2.0 A

• PDB DOI: https://doi.org/10.2210/pdb4NU8/pdb

• Classification: TRANSFERASE/TRANSFERASE INHIBITOR
• Organism(s): Haemophilus influenzae Rd KW20, Salmonella enterica subsp. enterica serovar Typhi
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2013-12-03 Released: 2014-12-03 
• Deposition Author(s): Ekka, M.K., Kaushik, A., Singh, A.K., Kumaran, S.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.07 Å
• R-Value Free: 
  0.235 (Depositor), 0.225 (DCC) 
• R-Value Work: 
  0.187 (Depositor), 0.180 (DCC) 
• R-Value Observed: 
  0.189 (Depositor) 

Starting Model: experimental

Literature

Crystal structure of O-acetylserine sulfhydrylase from Haemophilus influenzae in complex with high affinity inhibitory peptide from serine acetyl transferase of Salmonella Typhimurium at 2.0 A

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

To be published.

Biological Assembly 1  

Global Symmetry: Cyclic - C2  (Explore in 3D)
Global Stoichiometry: Hetero 4-mer - A2B2 Pseudo Symmetry: Asymmetric - C1 
Pseudo Stoichiometry: Hetero 4-mer - A2B1C1 

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

Macromolecule Content 

• Total Structure Weight: 35.47 kDa 
• Atom Count: 2,425 
• Modeled Residue Count: 319 
• Deposited Residue Count: 330 
• Unique protein chains: 2

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Cysteine synthase	A [auth X]	322	Haemophilus influenzae Rd KW20	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
Peptide from Serine acetyltransferase	B [auth A]	8	Salmonella enterica subsp. enterica serovar Typhi	Mutation(s): 0  EC: 2.3.1.30
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: 2.07 Å
• R-Value Free:  0.235 (Depositor), 0.225 (DCC) 
• R-Value Work:  0.187 (Depositor), 0.180 (DCC) 
• R-Value Observed: 0.189 (Depositor) 

Space Group: I 4₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 112.322	α = 90
b = 112.322	β = 90
c = 45.8	γ = 90

Software Package:

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

Structure Validation

Entry History 

Deposition Data

• Released Date: 2014-12-03 
Deposition Author(s): Ekka, M.K., Kaushik, A., Singh, A.K., Kumaran, S.

Revision History  

• Version 1.0: 2014-12-03
  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