4FFL

PylC in complex with L-lysine


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.5 Å
  • R-Value Free: 0.203 
  • R-Value Work: 0.169 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Biosynthesis of the 22nd genetically encoded amino acid pyrrolysine: structure and reaction mechanism of PylC at 1.5A resolution.

Quitterer, F.List, A.Beck, P.Bacher, A.Groll, M.

(2012) J.Mol.Biol. 424: 270-282

  • DOI: 10.1016/j.jmb.2012.09.007
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • The second step in the biosynthesis of the 22nd genetically encoded amino acid pyrrolysine (Pyl) is catalyzed by PylC that forms the pseudopeptide L-lysine-N(ε)-3R-methyl-D-ornithine. Here, we present six crystal structures of the monomeric active li ...

    The second step in the biosynthesis of the 22nd genetically encoded amino acid pyrrolysine (Pyl) is catalyzed by PylC that forms the pseudopeptide L-lysine-N(ε)-3R-methyl-D-ornithine. Here, we present six crystal structures of the monomeric active ligase in complex with substrates, reaction intermediates, and products including ATP, the non-hydrolyzable ATP analogue 5'-adenylyl-β-γ-imidodiphosphate, ADP, D-ornithine (D-Orn), L-lysine (Lys), phosphorylated D-Orn, L-lysine-N(ε)-D-ornithine, inorganic phosphate, carbonate, and Mg(2+). The overall structure of PylC reveals similarities to the superfamily of ATP-grasp enzymes; however, there exist unique structural and functional features for a topological control of successive substrate entry and product release. Furthermore, the presented high-resolution structures provide detailed insights into the reaction mechanism of isopeptide bond formation starting with phosphorylation of D-Orn by transfer of a phosphate moiety from activated ATP. The binding of Lys to the enzyme complex is then followed by an S(N)2 reaction resulting in L-lysine-N(ε)-D-ornithine and inorganic phosphate. Surprisingly, PylC harbors two adenine nucleotides bound at the active site, what has not been observed in any ATP-grasp protein analyzed to date. Whereas one ATP molecule is involved in catalysis, the second adenine nucleotide functions as a selective anchor for the C- and N-terminus of the Lys substrate and is responsible for protein stability as shown by mutagenesis.


    Organizational Affiliation

    Center for Integrated Protein Science at the Department Chemie, Lehrstuhl für Biochemie, Technische Universität München, Garching D-85747, Germany.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
PylC
A
363Methanosarcina barkeri (strain Fusaro / DSM 804)Mutation(s): 0 
Find proteins for Q46E79 (Methanosarcina barkeri (strain Fusaro / DSM 804))
Go to UniProtKB:  Q46E79
Small Molecules
Ligands 6 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ATP
Query on ATP

Download SDF File 
Download CCD File 
A
ADENOSINE-5'-TRIPHOSPHATE
C10 H16 N5 O13 P3
ZKHQWZAMYRWXGA-KQYNXXCUSA-N
 Ligand Interaction
PO4
Query on PO4

Download SDF File 
Download CCD File 
A
PHOSPHATE ION
O4 P
NBIIXXVUZAFLBC-UHFFFAOYSA-K
 Ligand Interaction
ADP
Query on ADP

Download SDF File 
Download CCD File 
A
ADENOSINE-5'-DIPHOSPHATE
C10 H15 N5 O10 P2
XTWYTFMLZFPYCI-KQYNXXCUSA-N
 Ligand Interaction
LYS
Query on LYS

Download SDF File 
Download CCD File 
A
LYSINE
C6 H15 N2 O2
KDXKERNSBIXSRK-YFKPBYRVSA-O
 Ligand Interaction
MG
Query on MG

Download SDF File 
Download CCD File 
A
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
CO3
Query on CO3

Download SDF File 
Download CCD File 
A
CARBONATE ION
C O3
BVKZGUZCCUSVTD-UHFFFAOYSA-L
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.5 Å
  • R-Value Free: 0.203 
  • R-Value Work: 0.169 
  • Space Group: P 43 21 2
Unit Cell:
Length (Å)Angle (°)
a = 61.190α = 90.00
b = 61.190β = 90.00
c = 171.830γ = 90.00
Software Package:
Software NamePurpose
REFMACphasing
XSCALEdata scaling
REFMACrefinement
XDSdata scaling
XDSdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2012-09-19
    Type: Initial release
  • Version 1.1: 2013-06-12
    Type: Database references