2QUS

Hammerhead Ribozyme G12A mutant pre-cleavage

PDB DOI: https://doi.org/10.2210/pdb2QUS/pdb
NAKB: 2QUS

Classification: RNA
Mutation(s): No

Deposited: 2007-08-06 Released: 2008-07-15
Deposition Author(s): Chi, Y.I., Scott, W.G., Kim, S.H.

Experimental Data Snapshot

Method: X-RAY DIFFRACTION
Resolution: 2.40 Å
R-Value Free:
0.253 (Depositor), 0.260 (DCC)
R-Value Work:
0.184 (Depositor), 0.190 (DCC)
R-Value Observed:
0.191 (Depositor)

Starting Model: in silico
View more details

wwPDB Validation 3D Report Full Report

This is version 1.3 of the entry. See complete history.

Literature

Capturing hammerhead ribozyme structures in action by modulating general base catalysis.

Chi, Y.I., Martick, M., Lares, M., Kim, R., Scott, W.G., Kim, S.H.

(2008) PLoS Biol 6: e234-e234

PubMed: 18834200 Search on PubMedSearch on PubMed Central
DOI: https://doi.org/10.1371/journal.pbio.0060234
Primary Citation of Related Structures:
2QUS, 2QUW

PubMed Abstract:
We have obtained precatalytic (enzyme-substrate complex) and postcatalytic (enzyme-product complex) crystal structures of an active full-length hammerhead RNA that cleaves in the crystal. Using the natural satellite tobacco ringspot virus hammerhead RNA sequence, the self-cleavage reaction was modulated by substituting the general base of the ribozyme, G12, with A12, a purine variant with a much lower pKa that does not significantly perturb the ribozyme's atomic structure. The active, but slowly cleaving, ribozyme thus permitted isolation of enzyme-substrate and enzyme-product complexes without modifying the nucleophile or leaving group of the cleavage reaction, nor any other aspect of the substrate. The predissociation enzyme-product complex structure reveals RNA and metal ion interactions potentially relevant to transition-state stabilization that are absent in precatalytic structures.

Organizational Affiliation

Department of Molecular and Cellular Biochemistry, Center for Structural Biology, University of Kentucky, Lexington, Kentucky, United States of America. ychi@uky.edu

Macromolecule Content

Total Structure Weight: 45.2 kDa
Atom Count: 3,113
Modelled Residue Count: 138
Deposited Residue Count: 138
Unique nucleic acid chains: 1

Macromolecules

Find similar nucleic acids by:

(by identity cutoff) | 3D Structure

Entity ID: 1
Molecule	Chains	Length	Organism	Image
Hammerhead ribozyme	A, B	69	N/A
Sequence Annotations Expand
Reference Sequence LOADING

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram	3D Interactions
MG Query on MG Download Ideal Coordinates CCD File SDF format, chain D [auth A] SDF format, chain H [auth A] SDF format, chain K [auth B] SDF format, chain M [auth B] SDF format, chain N [auth B] SDF format, chain C [auth A] SDF format, chain E [auth A] SDF format, chain F [auth A] SDF format, chain G [auth A] SDF format, chain I [auth A] SDF format, chain J [auth A] SDF format, chain L [auth B] SDF format, chain O [auth B] SDF format, chain P [auth B] SDF format, chain Q [auth B] SDF format, chain R [auth B] MOL2 format, chain D [auth A] MOL2 format, chain H [auth A] MOL2 format, chain K [auth B] MOL2 format, chain M [auth B] MOL2 format, chain N [auth B] MOL2 format, chain C [auth A] MOL2 format, chain E [auth A] MOL2 format, chain F [auth A] MOL2 format, chain G [auth A] MOL2 format, chain I [auth A] MOL2 format, chain J [auth A] MOL2 format, chain L [auth B] MOL2 format, chain O [auth B] MOL2 format, chain P [auth B] MOL2 format, chain Q [auth B] MOL2 format, chain R [auth B] mmCIF format, chain D [auth A] mmCIF format, chain H [auth A] mmCIF format, chain K [auth B] mmCIF format, chain M [auth B] mmCIF format, chain N [auth B] mmCIF format, chain C [auth A] mmCIF format, chain E [auth A] mmCIF format, chain F [auth A] mmCIF format, chain G [auth A] mmCIF format, chain I [auth A] mmCIF format, chain J [auth A] mmCIF format, chain L [auth B] mmCIF format, chain O [auth B] mmCIF format, chain P [auth B] mmCIF format, chain Q [auth B] mmCIF format, chain R [auth B]	C [auth A] D [auth A] E [auth A] F [auth A] G [auth A] C [auth A], D [auth A], E [auth A], F [auth A], G [auth A], H [auth A], I [auth A], J [auth A], K [auth B], L [auth B], M [auth B], N [auth B], O [auth B], P [auth B], Q [auth B], R [auth B]	MAGNESIUM ION Mg JLVVSXFLKOJNIY-UHFFFAOYSA-N		Interactions Focus chain C [auth A] Focus chain D [auth A] Focus chain E [auth A] Focus chain F [auth A] Focus chain G [auth A] Focus chain H [auth A] Focus chain I [auth A] Focus chain J [auth A] Focus chain K [auth B] Focus chain L [auth B] Focus chain M [auth B] Focus chain N [auth B] Focus chain O [auth B] Focus chain P [auth B] Focus chain Q [auth B] Focus chain R [auth B] Interactions & Density Focus chain C [auth A] Focus chain D [auth A] Focus chain E [auth A] Focus chain F [auth A] Focus chain G [auth A] Focus chain H [auth A] Focus chain I [auth A] Focus chain J [auth A] Focus chain K [auth B] Focus chain L [auth B] Focus chain M [auth B] Focus chain N [auth B] Focus chain O [auth B] Focus chain P [auth B] Focus chain Q [auth B] Focus chain R [auth B]

Experimental Data & Validation

Experimental Data

Method: X-RAY DIFFRACTION
Resolution: 2.40 Å
R-Value Free: 0.253 (Depositor), 0.260 (DCC)
R-Value Work: 0.184 (Depositor), 0.190 (DCC)
R-Value Observed: 0.191 (Depositor)

Space Group: P 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 27.926	α = 74.57
b = 53.03	β = 81.37
c = 71.963	γ = 75.61

Software Package:

Software Name	Purpose
REFMAC	refinement
PDB_EXTRACT	data extraction

Structure Validation

View Full Validation Report

Entry History

Deposition Data

Released Date: 2008-07-15

Deposition Author(s):

Chi, Y.I.

Scott, W.G.

Kim, S.H.

Revision History (Full details and data files)

Version 1.0: 2008-07-15
Type: Initial release
Version 1.1: 2011-07-13
Changes: Advisory, Version format compliance
Version 1.2: 2024-02-21
Changes: Data collection, Database references, Derived calculations
Version 1.3: 2024-04-03
Changes: Refinement description