6IOH

Crystal structure of Homoserine O-acetyltransferase in complex with Homoserine from Mycobacterium smegmatis ATCC 19420


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Free: 0.221 
  • R-Value Work: 0.188 
  • R-Value Observed: 0.189 

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Literature

Crystal structure and biochemical characterization of O-acetylhomoserine acetyltransferase from Mycobacterium smegmatis ATCC 19420.

Sagong, H.Y.Hong, J.Kim, K.J.

(2019) Biochem Biophys Res Commun 517: 399-406

  • DOI: 10.1016/j.bbrc.2019.07.117
  • Primary Citation of Related Structures:  
    6IOG, 6IOH, 6IOI

  • PubMed Abstract: 
  • Mycobacterium smegmatis is a good model for studying the physiology and pathogenesis of Mycobacterium tuberculosis due to its genetic similarity. As methionine biosynthesis exists only in microorganisms, the enzymes involved in methionine biosynthesis can be a potential target for novel antibiotics ...

    Mycobacterium smegmatis is a good model for studying the physiology and pathogenesis of Mycobacterium tuberculosis due to its genetic similarity. As methionine biosynthesis exists only in microorganisms, the enzymes involved in methionine biosynthesis can be a potential target for novel antibiotics. Homoserine O-acetyltransferase from M. smegmatis (MsHAT) catalyzes the transfer of acetyl-group from acetyl-CoA to homoserine. To investigate the molecular mechanism of MsHAT, we determined its crystal structure in apo-form and in complex with either CoA or homoserine and revealed the substrate binding mode of MsHAT. A structural comparison of MsHAT with other HATs suggests that the conformation of the α5 to α6 region might influence the shape of the dimer. In addition, the active site entrance shows an open or closed conformation and might determine the substrate binding affinity of HATs.


    Organizational Affiliation

    School of Life Sciences (KNU Creative BioResearch Group), KNU Institute for Microorganisms, Kyungpook National University, Daegu, 41566, Republic of Korea. Electronic address: kkim@knu.ac.kr.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Homoserine O-acetyltransferaseA, B375Mycolicibacterium smegmatisMutation(s): 0 
Gene Names: metX_1metXAERS451418_01697
EC: 2.3.1.31
UniProt
Find proteins for A0QSZ0 (Mycolicibacterium smegmatis (strain ATCC 700084 / mc(2)155))
Explore A0QSZ0 
Go to UniProtKB:  A0QSZ0
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupA0QSZ0
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
HSE (Subject of Investigation/LOI)
Query on HSE

Download Ideal Coordinates CCD File 
C [auth A],
D [auth B]
L-HOMOSERINE
C4 H9 N O3
UKAUYVFTDYCKQA-VKHMYHEASA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Free: 0.221 
  • R-Value Work: 0.188 
  • R-Value Observed: 0.189 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 53.94α = 90
b = 95.033β = 90
c = 141.864γ = 90
Software Package:
Software NamePurpose
HKL-2000data reduction
REFMACrefinement
PDB_EXTRACTdata extraction
HKL-2000data scaling
MOLREPphasing

Structure Validation

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Ligand Structure Quality Assessment 


Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2019-09-04
    Type: Initial release