7KA0

Crystal structure of the complex of M. tuberculosis PheRS with cognate precursor tRNA and phenylalanine


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.40 Å
  • R-Value Free: 0.215 
  • R-Value Work: 0.177 
  • R-Value Observed: 0.179 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Mycobacterium tuberculosis Phe-tRNA synthetase: structural insights into tRNA recognition and aminoacylation.

Michalska, K.Jedrzejczak, R.Wower, J.Chang, C.Baragana, B.Gilbert, I.H.Forte, B.Joachimiak, A.

(2021) Nucleic Acids Res 49: 5351-5368

  • DOI: 10.1093/nar/gkab272
  • Primary Citation of Related Structures:  
    7K98, 7K9M, 7KAB, 7KA0

  • PubMed Abstract: 
  • Tuberculosis, caused by Mycobacterium tuberculosis, responsible for ∼1.5 million fatalities in 2018, is the deadliest infectious disease. Global spread of multidrug resistant strains is a public health threat, requiring new treatments. Aminoacyl-tRNA synthetases are plausible candidates as potential drug targets, because they play an essential role in translating the DNA code into protein sequence by attaching a specific amino acid to their cognate tRNAs ...

    Tuberculosis, caused by Mycobacterium tuberculosis, responsible for ∼1.5 million fatalities in 2018, is the deadliest infectious disease. Global spread of multidrug resistant strains is a public health threat, requiring new treatments. Aminoacyl-tRNA synthetases are plausible candidates as potential drug targets, because they play an essential role in translating the DNA code into protein sequence by attaching a specific amino acid to their cognate tRNAs. We report structures of M. tuberculosis Phe-tRNA synthetase complexed with an unmodified tRNAPhe transcript and either L-Phe or a nonhydrolyzable phenylalanine adenylate analog. High-resolution models reveal details of two modes of tRNA interaction with the enzyme: an initial recognition via indirect readout of anticodon stem-loop and aminoacylation ready state involving interactions of the 3' end of tRNAPhe with the adenylate site. For the first time, we observe the protein gate controlling access to the active site and detailed geometry of the acyl donor and tRNA acceptor consistent with accepted mechanism. We biochemically validated the inhibitory potency of the adenylate analog and provide the most complete view of the Phe-tRNA synthetase/tRNAPhe system to date. The presented topography of amino adenylate-binding and editing sites at different stages of tRNA binding to the enzyme provide insights for the rational design of anti-tuberculosis drugs.


    Organizational Affiliation

    Department of Biochemistry and Molecular Biology, University of Chicago, Chicago, IL 60367, USA.



Macromolecules

Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Phenylalanine--tRNA ligase alpha subunitA, D341Mycobacterium tuberculosis H37RvMutation(s): 0 
Gene Names: pheSRv1649MTCY06H11.14
EC: 6.1.1.20
UniProt
Find proteins for P9WFU3 (Mycobacterium tuberculosis (strain ATCC 25618 / H37Rv))
Explore P9WFU3 
Go to UniProtKB:  P9WFU3
Protein Feature View
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Phenylalanine--tRNA ligase beta subunitB, E835Mycobacterium tuberculosis H37RvMutation(s): 0 
Gene Names: pheTRv1650MTCY06H11.15
EC: 6.1.1.20
UniProt
Find proteins for P9WFU1 (Mycobacterium tuberculosis (strain ATCC 25618 / H37Rv))
Explore P9WFU1 
Go to UniProtKB:  P9WFU1
Protein Feature View
Expand
  • Reference Sequence
Find similar nucleic acids by:  (by identity cutoff)  |  Structure
Entity ID: 3
MoleculeChainsLengthOrganismImage
tRNA(Phe)C, F77Mycobacterium tuberculosis H37Rv
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 7 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
PHE
Query on PHE

Download Ideal Coordinates CCD File 
BA [auth D], G [auth A]PHENYLALANINE
C9 H11 N O2
COLNVLDHVKWLRT-QMMMGPOBSA-N
 Ligand Interaction
PGE
Query on PGE

Download Ideal Coordinates CCD File 
K [auth A], QA [auth E], X [auth B]TRIETHYLENE GLYCOL
C6 H14 O4
ZIBGPFATKBEMQZ-UHFFFAOYSA-N
 Ligand Interaction
SO4
Query on SO4

Download Ideal Coordinates CCD File 
DA [auth D], LA [auth E], OA [auth E], Q [auth B], S [auth B], SA [auth E], V [auth B]SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
GOL
Query on GOL

Download Ideal Coordinates CCD File 
EA [auth D] , FA [auth D] , H [auth A] , HA [auth D] , I [auth A] , JA [auth D] , L [auth A] , M [auth A] , 
EA [auth D],  FA [auth D],  H [auth A],  HA [auth D],  I [auth A],  JA [auth D],  L [auth A],  M [auth A],  N [auth A],  PA [auth E],  R [auth B],  U [auth B]
GLYCEROL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
ACT
Query on ACT

Download Ideal Coordinates CCD File 
GA [auth D], J [auth A]ACETATE ION
C2 H3 O2
QTBSBXVTEAMEQO-UHFFFAOYSA-M
 Ligand Interaction
K
Query on K

Download Ideal Coordinates CCD File 
IA [auth D], RA [auth E], T [auth B]POTASSIUM ION
K
NPYPAHLBTDXSSS-UHFFFAOYSA-N
 Ligand Interaction
MG
Query on MG

Download Ideal Coordinates CCD File 
AA [auth C] , CA [auth D] , KA [auth D] , MA [auth E] , NA [auth E] , O [auth A] , P [auth A] , TA [auth F] , 
AA [auth C],  CA [auth D],  KA [auth D],  MA [auth E],  NA [auth E],  O [auth A],  P [auth A],  TA [auth F],  UA [auth F],  W [auth B],  Y [auth C],  Z [auth C]
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.40 Å
  • R-Value Free: 0.215 
  • R-Value Work: 0.177 
  • R-Value Observed: 0.179 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 292.859α = 90
b = 109.98β = 100.16
c = 127.951γ = 90
Software Package:
Software NamePurpose
SCALEPACKdata scaling
SBC-Collectdata collection
PHENIXrefinement
PDB_EXTRACTdata extraction
HKL-3000data reduction
HKL-3000phasing

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)United StatesHHSN272201700060C

Revision History  (Full details and data files)

  • Version 1.0: 2021-05-12
    Type: Initial release
  • Version 1.1: 2021-06-02
    Changes: Database references
  • Version 1.2: 2021-06-16
    Changes: Database references