Biological Assembly 1  

 3D View: Structure | 1D-3D View | Validation Report

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 3.87 kDa 
• Atom Count: 256 
• Modelled Residue Count: 12 
• Deposited Residue Count: 12 
• Unique nucleic acid chains: 1

1ZIH

GCAA RNA TETRALOOP, NMR, 10 STRUCTURES

• PDB DOI: 10.2210/pdb1ZIH/pdb
• NDB: 1ZIH

• Classification: RNA
• Mutation(s): No 


• Deposited: 1996-07-27 Released: 1997-03-12 
• Deposition Author(s): Jucker, F.M., Heus, H.A., Yip, P.F., Moors, E., Pardi, A.

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Experimental Data Snapshot

• Method: SOLUTION NMR
• Conformers Submitted: 10 

Literature

A network of heterogeneous hydrogen bonds in GNRA tetraloops.

Jucker, F.M., Heus, H.A., Yip, P.F., Moors, E.H., Pardi, A.

(1996) J Mol Biol 264: 968-980

• PubMed: 9000624 
• DOI: 10.1006/jmbi.1996.0690
• Primary Citation of Related Structures:  
  1ZIF, 1ZIG, 1ZIH


• PubMed Abstract: 
  

RNA hairpin loops containing a GNRA consensus sequence are the most frequently occurring hairpins in a variety of prokaryotic and eukaryotic RNAs. These tetraloops play important functional roles in RNA folding, in RNA-RNA tertiary interactions and as protein binding sites. Homo and heteronuclear NMR spectroscopy have been used to determine the structures of the most abundant members of the GNRA tetraloop family: the GAGA, GCAA and GAAA loops closed by a C-G base pair. Analysis of the structures of these three hairpin loops reveals a network of heterogeneous hydrogen bonds. The loops contain a G-A base pair, a G base-phosphate hydrogen bond and several 2' OH-base hydrogen bonds. These intramolecular interactions and the extensive base stacking in the loop help explain the high thermodynamic stability and give insight into the diverse biological roles of the GNRA RNA hairpins.

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Related Citations: 

• Structural Features that Give Rise to the Unusual Stability of RNA Hairpins Containing Gnra Loops
  Heus, H.A., Pardi, A.
  (1991) Science 253: 191

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Organizational Affiliation: 

Department of Chemistry and Biochemistry, University of Colorado at Boulder, 80309-0215, USA.

Macromolecules

Entity ID: 1
Molecule	Chains	Length	Organism	Image
RNA (5'-R(*GP*GP*GP*CP*GP*CP*AP*AP*GP*CP*CP*U)-3')	A	12	N/A

Experimental Data & Validation

Experimental Data

• Method: SOLUTION NMR
• Conformers Submitted: 10 
• OLDERADO: 1ZIH Olderado

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 1996-07-27 
• Released Date: 1997-03-12 
Deposition Author(s): Jucker, F.M., Heus, H.A., Yip, P.F., Moors, E., Pardi, A.

Revision History  

• Version 1.0: 1997-03-12
  Type: Initial release
  
• Version 1.1: 2008-03-24
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2022-03-02
  Changes: Database references, Derived calculations, Other