1FWK

CRYSTAL STRUCTURE OF HOMOSERINE KINASE COMPLEXED WITH ADP

• PDB DOI: https://doi.org/10.2210/pdb1FWK/pdb

• Classification: TRANSFERASE
• Organism(s): Methanocaldococcus jannaschii
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2000-09-22 Released: 2000-12-20 
• Deposition Author(s): Zhou, T., Daugherty, M., Grishin, N.V., Osterman, A.L., Zhang, H.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.10 Å
• R-Value Free: 0.246 
• R-Value Work: 0.209 

Literature

Structure and mechanism of homoserine kinase: prototype for the GHMP kinase superfamily.

Zhou, T., Daugherty, M., Grishin, N.V., Osterman, A.L., Zhang, H.

(2000) Structure 8: 1247-1257

• PubMed: 11188689 
• DOI: https://doi.org/10.1016/s0969-2126(00)00533-5
• Primary Citation of Related Structures:  
  1FWK, 1FWL


• PubMed Abstract: 
  

  Homoserine kinase (HSK) catalyzes an important step in the threonine biosynthesis pathway. It belongs to a large yet unique class of small metabolite kinases, the GHMP kinase superfamily. Members in the GHMP superfamily participate in several essential metabolic pathways, such as amino acid biosynthesis, galactose metabolism, and the mevalonate pathway.

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Organizational Affiliation: 

Department of Biochemistry, University of Texas Southwestern Medical Center, Dallas 75390, USA.

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 2  

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

Biological assembly 2 assigned by authors and generated by PISA (software)

Biological Assembly 3  

Global Symmetry: Cyclic - C2  (Explore in 3D)
Global Stoichiometry: Homo 4-mer - A4 

Biological assembly 3 generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 130.93 kDa 
• Atom Count: 9,781 
• Modelled Residue Count: 1,184 
• Deposited Residue Count: 1,184 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
HOMOSERINE KINASE	A, B, C, D	296	Methanocaldococcus jannaschii	Mutation(s): 0  EC: 2.7.1.39
UniProt
Find proteins for Q58504 (Methanocaldococcus jannaschii (strain ATCC 43067 / DSM 2661 / JAL-1 / JCM 10045 / NBRC 100440)) Explore Q58504  Go to UniProtKB:  Q58504

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
ADP	E [auth A], F [auth B], G [auth C], I [auth D]	ADENOSINE-5'-DIPHOSPHATE C10 H15 N5 O10 P2 XTWYTFMLZFPYCI-KQYNXXCUSA-N
MG	H [auth D]	MAGNESIUM ION Mg JLVVSXFLKOJNIY-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.10 Å
• R-Value Free: 0.246 
• R-Value Work: 0.209 
• Space Group: P 1 2₁ 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 62.206	α = 90
b = 129.147	β = 105.52
c = 109.773	γ = 90

Software Package:

Software Name	Purpose
MLPHARE	phasing
CNS	refinement
SCALEPACK	data scaling

Structure Validation

Entry History 

Deposition Data

• Released Date: 2000-12-20 
Deposition Author(s): Zhou, T., Daugherty, M., Grishin, N.V., Osterman, A.L., Zhang, H.

Revision History  

• Version 1.0: 2000-12-20
  Type: Initial release
  
• Version 1.1: 2008-04-27
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2017-10-04
  Changes: Refinement description
• Version 1.4: 2024-02-07
  Changes: Data collection, Database references, Derived calculations