3G8T

Crystal structure of the G33A mutant Bacillus anthracis glmS ribozyme bound to GlcN6P

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.00 Å
  • R-Value Free: 0.318 
  • R-Value Work: 0.250 
  • R-Value Observed: 0.253 

wwPDB Validation   3D Report Full Report


Ligand Structure Quality Assessment 


This is version 1.6 of the entry. See complete history. 


Literature

Structural and chemical basis for glucosamine 6-phosphate binding and activation of the glmS ribozyme

Cochrane, J.C., Lipchock, S.V., Smith, K.D., Strobel, S.A.

(2009) Biochemistry 48: 3239-3246

  • DOI: https://doi.org/10.1021/bi802069p
  • Primary Citation of Related Structures:  
    3G8S, 3G8T, 3G96, 3G9C, 3L3C

  • PubMed Abstract: 

    • The glmS ribozyme is the first naturally occurring catalytic RNA that relies on an exogenous, nonnucleotide cofactor for reactivity. From a biochemical perspective, the glmS ribozyme derived from Bacillus anthracis is the best characterized. However, much of the structural work to date has been done on a variant glmS ribozyme, derived from Thermoanaerobacter tengcongensis ...

    The glmS ribozyme is the first naturally occurring catalytic RNA that relies on an exogenous, nonnucleotide cofactor for reactivity. From a biochemical perspective, the glmS ribozyme derived from Bacillus anthracis is the best characterized. However, much of the structural work to date has been done on a variant glmS ribozyme, derived from Thermoanaerobacter tengcongensis. Here we present structures of the B. anthracis glmS ribozyme in states before the activating sugar, glucosamine 6-phosphate (GlcN6P), has bound and after the reaction has occurred. These structures show an active site preorganized to bind GlcN6P that retains some affinity for the sugar even after cleavage of the RNA backbone. A structure of an inactive glmS ribozyme with a mutation distal from the ligand-binding pocket highlights a nucleotide critical to the reaction that does not affect GlcN6P binding. Structures of the glmS ribozyme bound to a naturally occurring inhibitor, glucose 6-phosphate (Glc6P), and a nonnatural activating sugar, mannosamine 6-phosphate (MaN6P), reveal a binding mode similar to that of GlcN6P. Kinetic analyses show a pH dependence of ligand binding that is consistent with titration of the cofactor's phosphate group and support a model in which the major determinant of activity is the sugar amine independent of its stereochemical presentation.

    Organizational Affiliation: 

    Department of Molecular Biophysics and Biochemistry, Yale University, New Haven, Connecticut 06520, USA.



Macromolecules

Find similar proteins by: 
(by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
U1 small nuclear ribonucleoprotein AA,
D [auth B],
G [auth C],
J [auth D]		98Homo sapiensMutation(s): 2 
Gene Names: SNRPA
UniProt & NIH Common Fund Data Resources
Find proteins for P09012 (Homo sapiens)
Explore P09012 
Go to UniProtKB:  P09012
PHAROS:  P09012
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP09012
Protein Feature View
Expand
  • Reference Sequence

Find similar nucleic acids by:  Sequence   |   3D Structure  

Entity ID: 2
MoleculeChainsLengthOrganismImage
RNA (5'-R(*AP*(A2M)P*GP*CP*GP*CP*CP*AP*GP*AP*AP*CP*U)-3')B [auth E],
E [auth F],
H [auth G],
K [auth H]		13synthetic construct
Protein Feature View
Expand
  • Reference Sequence
Find similar nucleic acids by: 
(by identity cutoff)  |  3D Structure
Entity ID: 3
MoleculeChainsLengthOrganismImage
glmS glucosamine-6-phosphate activated ribozymeC [auth P],
F [auth Q],
I [auth R],
L [auth S]		141synthetic construct
Protein Feature View
Expand
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.00 Å
  • R-Value Free: 0.318 
  • R-Value Work: 0.250 
  • R-Value Observed: 0.253 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 48.389α = 90
b = 232.671β = 92.21
c = 106.576γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
MOLREPphasing
REFMACrefinement
PDB_EXTRACTdata extraction

Structure Validation

View Full Validation Report



Ligand Structure Quality Assessment 


View more in-depth experimental data
Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2009-11-03
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Non-polymer description, Version format compliance
  • Version 1.2: 2017-11-01
    Changes: Refinement description
  • Version 1.3: 2018-04-04
    Changes: Data collection, Database references
  • Version 1.4: 2018-04-11
    Changes: Data collection, Source and taxonomy
  • Version 1.5: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Data collection, Derived calculations, Structure summary
  • Version 1.6: 2021-10-20
    Changes: Database references, Structure summary