5IKH

Tobacco 5-epi-aristolochene synthase M4 mutant with (-)-premnaspirodiene


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.10 Å
  • R-Value Free: 0.224 
  • R-Value Work: 0.181 
  • R-Value Observed: 0.182 

Starting Model: experimental
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Ligand Structure Quality Assessment 


This is version 1.1 of the entry. See complete history


Literature

Biosynthetic potential of sesquiterpene synthases: product profiles of Egyptian Henbane premnaspirodiene synthase and related mutants.

Koo, H.J.Vickery, C.R.Xu, Y.Louie, G.V.O'Maille, P.E.Bowman, M.Nartey, C.M.Burkart, M.D.Noel, J.P.

(2016) J Antibiot (Tokyo) 69: 524-533

  • DOI: https://doi.org/10.1038/ja.2016.68
  • Primary Citation of Related Structures:  
    5IK0, 5IK6, 5IK9, 5IKA, 5IKH

  • PubMed Abstract: 

    The plant terpene synthase (TPS) family is responsible for the biosynthesis of a variety of terpenoid natural products possessing diverse biological functions. TPSs catalyze the ionization and, most commonly, rearrangement and cyclization of prenyl diphosphate substrates, forming linear and cyclic hydrocarbons. Moreover, a single TPS often produces several minor products in addition to a dominant product. We characterized the catalytic profiles of Hyoscyamus muticus premnaspirodiene synthase (HPS) and compared it with the profile of a closely related TPS, Nicotiana tabacum 5-epi-aristolochene synthase (TEAS). The profiles of two previously studied HPS and TEAS mutants, each containing nine interconverting mutations, dubbed HPS-M9 and TEAS-M9, were also characterized. All four TPSs were compared under varying temperature and pH conditions. In addition, we solved the X-ray crystal structures of TEAS and a TEAS quadruple mutant complexed with substrate and products to gain insight into the enzymatic features modulating product formation. These informative structures, along with product profiles, provide new insight into plant TPS catalytic promiscuity.


  • Organizational Affiliation

    Howard Hughes Medical Institute, The Salk Institute for Biological Studies, Jack H Skirball Center for Chemical Biology and Proteomics, La Jolla, CA, USA.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
5-epi-aristolochene synthase550Nicotiana tabacumMutation(s): 0 
Gene Names: EAS3EAS4
EC: 4.2.3.61 (PDB Primary Data), 4.2.3.226 (UniProt), 4.2.3.227 (UniProt)
UniProt
Find proteins for Q40577 (Nicotiana tabacum)
Explore Q40577 
Go to UniProtKB:  Q40577
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ40577
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.10 Å
  • R-Value Free: 0.224 
  • R-Value Work: 0.181 
  • R-Value Observed: 0.182 
  • Space Group: P 41 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 126.19α = 90
b = 126.19β = 90
c = 122.12γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
iMOSFLMdata reduction
SCALAdata scaling
PHENIXphasing

Structure Validation

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Ligand Structure Quality Assessment 


Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2016-10-05
    Type: Initial release
  • Version 1.1: 2023-09-27
    Changes: Data collection, Database references, Derived calculations, Refinement description