4HO1 | pdb_00004ho1

The Crystal structure of Haemophilus influenzae O-acetylserine sulfhydrylase at 1.85A resolution

• PDB DOI: https://doi.org/10.2210/pdb4HO1/pdb

• Classification: TRANSFERASE
• Organism(s): Haemophilus influenzae Rd KW20
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2012-10-22 Released: 2013-11-13 
• Deposition Author(s): Banerjee, S., Singh, A.K., Kumaran, S.

---

Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.86 Å
• R-Value Free: 
  0.163 (Depositor), 0.168 (DCC) 
• R-Value Work: 
  0.140 (Depositor), 0.145 (DCC) 
• R-Value Observed: 
  0.141 (Depositor) 

Starting Model: experimental

Literature

The Crystal structure of Haemophilus influenzae O-acetylserine sulfhydrylase at 1.85A resolution

Banerjee, S., Singh, A.K., Kumaran, S.

To be published.

Biological Assembly 1  

Global Symmetry: Cyclic - C2  (Explore in 3D)
Global Stoichiometry: Homo 2-mer - A2 

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

Macromolecule Content 

• Total Structure Weight: 33.87 kDa 
• Atom Count: 2,448 
• Modeled Residue Count: 310 
• Deposited Residue Count: 316 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Cysteine synthase	A [auth X]	316	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

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
GOL	B [auth X]	GLYCEROL C3 H8 O3 PEDCQBHIVMGVHV-UHFFFAOYSA-N
EDO	C [auth X], D [auth X]	1,2-ETHANEDIOL C2 H6 O2 LYCAIKOWRPUZTN-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: 1.86 Å
• R-Value Free:  0.163 (Depositor), 0.168 (DCC) 
• R-Value Work:  0.140 (Depositor), 0.145 (DCC) 
• R-Value Observed: 0.141 (Depositor) 

Space Group: I 4₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 112.786	α = 90
b = 112.786	β = 90
c = 46.297	γ = 90

Software Package:

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

Structure Validation

Entry History 

Deposition Data

• Released Date: 2013-11-13 
Deposition Author(s): Banerjee, S., Singh, A.K., Kumaran, S.

Revision History  

• Version 1.0: 2013-11-13
  Type: Initial release
  
• Version 1.1: 2023-09-20
  Changes: Data collection, Database references, Derived calculations, Refinement description
• Version 1.2: 2023-12-06
  Changes: Data collection