7EWO

Crystal Structure of D67A, E68P double mutant of O-acetyl-L-serine sulfhydrylase from Haemophilus influenzae

• PDB DOI: https://doi.org/10.2210/pdb7EWO/pdb

• Classification: TRANSFERASE
• Organism(s): Haemophilus influenzae Rd KW20
• Expression System: Escherichia coli 'BL21-Gold(DE3)pLysS AG
• Mutation(s): Yes 


• Deposited: 2021-05-25 Released: 2021-06-23 
• Deposition Author(s): Rahisuddin, R., Ekka, M.K., Singh, A.K., Saini, N., Patel, M., Kumar, N., Kumaran, S.
• Funding Organization(s): Department of Biotechnology (DBT, India)

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.40 Å
• R-Value Free: 0.257 
• R-Value Work: 0.192 
• R-Value Observed: 0.195 

Literature

Crystal Structure of D67A, E68P double mutant of O-acetyl-L-serine sulfhydrylase from Haemophilus influenzae

Rahisuddin, R., Ekka, M.K., Singh, A.K., Saini, N., Patel, M., 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)

Biological Assembly Evidence: gel filtration

Macromolecule Content

• Total Structure Weight: 37.24 kDa 
• Atom Count: 2,154 
• Modelled Residue Count: 299 
• Deposited Residue Count: 350 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Cysteine synthase	A	350	Haemophilus influenzae Rd KW20	Mutation(s): 2  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

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

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.40 Å
• R-Value Free: 0.257 
• R-Value Work: 0.192 
• R-Value Observed: 0.195 
• Space Group: I 4₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 113.212	α = 90
b = 113.212	β = 90
c = 43.475	γ = 90

Software Package:

Software Name	Purpose
PHENIX	refinement
PHENIX	refinement
MOSFLM	data reduction
SCALA	data scaling
PHASER	phasing

Structure Validation

Entry History & Funding Information

Deposition Data

• Released Date: 2021-06-23 
Deposition Author(s): Rahisuddin, R., Ekka, M.K., Singh, A.K., Saini, N., Patel, M., Kumar, N., Kumaran, S.

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Funding Organization	Location	Grant Number
Department of Biotechnology (DBT, India)	India	BT/PR5236/MED/29/504/2012

Revision History  

• Version 1.0: 2021-06-23
  Type: Initial release
  
• Version 1.1: 2023-11-29
  Changes: Data collection, Database references, Refinement description