1MHK

Crystal Structure Analysis of a 26mer RNA molecule, representing a new RNA motif, the hook-turn

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.50 Å
  • R-Value Free: 0.270 
  • R-Value Work: 0.239 
  • R-Value Observed: 0.243 

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This is version 1.2 of the entry. See complete history. 


Literature

The crystal structure of a 26-nucleotide RNA containing a hook-turn

Szep, S., Wang, J., Moore, P.B.

(2003) RNA 9: 44-51

  • DOI: 10.1261/rna.2107303
  • Primary Citation of Related Structures:  
    1MHK

  • PubMed Abstract: 

    • A crystal structure has been obtained for a 26-nucleotide RNA that contains the loop E sequence from Chromatium minutissimum. Rather than having a loop E-like conformation, it consists of an A-form helix that splits into two separate strands following a sheared A-G base pair ...

    A crystal structure has been obtained for a 26-nucleotide RNA that contains the loop E sequence from Chromatium minutissimum. Rather than having a loop E-like conformation, it consists of an A-form helix that splits into two separate strands following a sheared A-G base pair. The backbone of the strand containing the G of the A-G pair makes a turn of almost 180 degrees in the space of two nucleotides, and then interacts with the minor groove of the helix from which it originates. Similar structures, which we call hook-turns, occur in 16S and 23S rRNAs. They are found at places where the two strands of a helix separate at an A/G juxtaposition to interact with other sequences.

    Organizational Affiliation: 

    Department of Chemistry, Yale University, New Haven, Connecticut 06520, USA.



Macromolecules

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Entity ID: 1
MoleculeChainsLengthOrganismImage
RNA 12-mer BCh12A [auth S]12N/A
Protein Feature View
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  • Reference Sequence

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Entity ID: 2
MoleculeChainsLengthOrganismImage
RNA 14-mer BCh12B [auth L]14N/A
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
BR
Query on BR
Download Ideal Coordinates CCD File 
C [auth S]BROMIDE ION
Br
CPELXLSAUQHCOX-UHFFFAOYSA-M		 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.50 Å
  • R-Value Free: 0.270 
  • R-Value Work: 0.239 
  • R-Value Observed: 0.243 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 30.169α = 90
b = 62.51β = 98.76
c = 50.933γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
CNSrefinement
CNSphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2002-09-06
    Type: Initial release
  • Version 1.1: 2007-10-16
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance