6PGM

PirF geranyltransferase


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.30 Å
  • R-Value Free: 0.268 
  • R-Value Work: 0.224 
  • R-Value Observed: 0.227 

Starting Model: experimental
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wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

A Single Amino Acid Switch Alters the Isoprene Donor Specificity in Ribosomally Synthesized and Post-Translationally Modified Peptide Prenyltransferases.

Estrada, P.Morita, M.Hao, Y.Schmidt, E.W.Nair, S.K.

(2018) J Am Chem Soc 140: 8124-8127

  • DOI: https://doi.org/10.1021/jacs.8b05187
  • Primary Citation of Related Structures:  
    6PGM, 6PGN

  • PubMed Abstract: 

    Mutation at a single amino acid alters the isoprene donor specificity of prenyltransferases involved in the modification of ribosomally synthesized and post-translationally modified peptides (RiPPs). Though most characterized RiPP prenyltransferases carry out the regiospecific transfer of C 5 dimethylallyl donor to the side chain atoms on macrocyclic acceptor substrates, the elucidation of the cyanobactin natural product piricyclamide 70005E1 identifies an O-geranyl modification on Tyr, a reaction with little prior biochemical precedence. Reconstitution and kinetic studies of the presumptive geranyltransferase PirF shows that the enzyme utilizes a C 10 donor, with no C 5 transferase activity. The crystal structure of PirF reveals a single amino acid difference in the vicinity of the isoprene-binding pocket, relative to the C 5 utilizing enzymes. Remarkably, only a single amino acid mutation is necessary to completely switch the donor specificity from a C 5 to a C 10 prenyltransferase, and vice versa. Lastly, we demonstrate that these enzymes may be used for the chemospecific attachment of C 5 or C 10 lipid groups on lanthipeptides, an unrelated class of RiPP natural products. These studies represent a rare example where prenyl donor specificity can be discretely altered, which expands the arsenal of synthetic biology tools for tuning biological activities of peptide natural products.


  • Organizational Affiliation

    Department of Medicinal Chemistry , University of Utah , Salt Lake City , Utah 84112 , United States.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
PirF Geranyltransferase
A, B
295Microcystis aeruginosa PCC 7005Mutation(s): 0 
Gene Names: pirF
EC: 2
UniProt
Find proteins for J3S802 (Microcystis aeruginosa PCC 7005)
Explore J3S802 
Go to UniProtKB:  J3S802
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupJ3S802
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.30 Å
  • R-Value Free: 0.268 
  • R-Value Work: 0.224 
  • R-Value Observed: 0.227 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 122.898α = 90
b = 93.911β = 128.51
c = 93.831γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
HKL-2000data reduction
pointlessdata scaling
SHARPphasing

Structure Validation

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Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)United StatesGM079038

Revision History  (Full details and data files)

  • Version 1.0: 2019-07-03
    Type: Initial release
  • Version 1.1: 2020-01-01
    Changes: Author supporting evidence
  • Version 1.2: 2023-10-11
    Changes: Data collection, Database references, Refinement description