3NH2

Crystal structure of RNase T in complex with a stem DNA with a 3' overhang


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.3 Å
  • R-Value Free: 0.241 
  • R-Value Work: 0.186 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structural basis for RNA trimming by RNase T in stable RNA 3'-end maturation

Hsiao, Y.-Y.Yang, C.-C.Lin, C.L.Lin, J.L.J.Duh, Y.Yuan, H.S.

(2011) Nat.Chem.Biol. 7: 236-243

  • DOI: 10.1038/nchembio.524
  • Primary Citation of Related Structures:  3NGY, 3NGZ, 3NH0, 3NH1

  • PubMed Abstract: 
  • RNA maturation relies on various exonucleases to remove nucleotides successively from the 5' or 3' end of nucleic acids. However, little is known regarding the molecular basis for substrate and cleavage preference of exonucleases. Our biochemical and ...

    RNA maturation relies on various exonucleases to remove nucleotides successively from the 5' or 3' end of nucleic acids. However, little is known regarding the molecular basis for substrate and cleavage preference of exonucleases. Our biochemical and structural analyses on RNase T-DNA complexes show that the RNase T dimer has an ideal architecture for binding a duplex with a short 3' overhang to produce a digestion product of a duplex with a 2-nucleotide (nt) or 1-nt 3' overhang, depending on the composition of the last base pair in the duplex. A 'C-filter' in RNase T screens out the nucleic acids with 3'-terminal cytosines for hydrolysis by inducing a disruptive conformational change at the active site. Our results reveal the general principles and the working mechanism for the final trimming step made by RNase T in the maturation of stable RNA and pave the way for the understanding of other DEDD family exonucleases.


    Organizational Affiliation

    Institute of Bioinformatics and Structural Biology, National Tsing Hua University, Hsinchu, Taiwan, ROC.




Macromolecules

Find similar proteins by: Sequence  |  Structure


Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Ribonuclease T
A, B, E, F
235Escherichia coli (strain K12)Gene Names: rnt
EC: 3.1.13.-
Find proteins for P30014 (Escherichia coli (strain K12))
Go to UniProtKB:  P30014
Entity ID: 2
MoleculeChainsLengthOrganism
5'-D(P*TP*TP*AP*CP*AP*AP*C)-3'C,D,G,H7N/A
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.3 Å
  • R-Value Free: 0.241 
  • R-Value Work: 0.186 
  • Space Group: P 1
Unit Cell:
Length (Å)Angle (°)
a = 60.379α = 82.77
b = 62.560β = 82.92
c = 62.657γ = 66.13
Software Package:
Software NamePurpose
AMoREphasing
HKL-2000data scaling
PHENIXrefinement
HKL-2000data collection
HKL-2000data reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2011-02-16
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance
  • Version 1.2: 2011-12-21
    Type: Database references