2RBI

STRUCTURE OF BINASE MUTANT HIS 101 ASN


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.20 Å
  • R-Value Work: 0.178 

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This is version 1.2 of the entry. See complete history


Literature

RNA cleavage without hydrolysis. Splitting the catalytic activities of binase with Asn101 and Thr101 mutations.

Okorokov, A.L.Panov, K.I.Offen, W.A.Mukhortov, V.G.Antson, A.A.Karpeisky, M.Y.a.Wilkinson, A.J.Dodson, G.G.

(1997) Protein Eng 10: 273-278

  • DOI: 10.1093/protein/10.3.273
  • Primary Citation of Related Structures:  
    2RBI

  • PubMed Abstract: 
  • Members of the microbial guanyl-specific ribonuclease family catalyse the endonucleolytic cleavage of single-stranded RNA in a two-step reaction involving transesterification to form a 2',3'-cyclic phosphate and its subsequent hydrolysis to yield the respective 3'-phosphate ...

    Members of the microbial guanyl-specific ribonuclease family catalyse the endonucleolytic cleavage of single-stranded RNA in a two-step reaction involving transesterification to form a 2',3'-cyclic phosphate and its subsequent hydrolysis to yield the respective 3'-phosphate. The extracellular ribonuclease from Bacillus intermedius (binase, RNase Bi) shares a common mechanism for RNA hydrolysis with mammalian RNases. Two catalytic residues in the active site of binase, Glu72 and His101, are thought to be involved in general acid-general base catalysis of RNA cleavage. Using site-directed mutagenesis, binase mutants were produced containing amino acid substitutions H101N and H101T and their catalytic properties towards RNA, poly(I), poly(A), GpC and guanosine 2',3'-cyclic phosphate (cGMP) substrates were studied. The engineered mutant proteins are active in the transesterification step which produces the 2',3'-cyclic phosphate species but they have lost the ability to catalyse hydrolysis of the cyclic phosphate to give the 3' monophosphate product.


    Organizational Affiliation

    Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Moscow, Russia.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
RIBONUCLEASEA, B109Bacillus intermediusMutation(s): 1 
Gene Names: PHOA-BINASE HIS101ASN
EC: 3.1.27
UniProt
Find proteins for P00649 (Bacillus intermedius)
Explore P00649 
Go to UniProtKB:  P00649
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.20 Å
  • R-Value Work: 0.178 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 111.26α = 90
b = 69.15β = 90
c = 33.37γ = 90
Software Package:
Software NamePurpose
CCP4model building
PROLSQrefinement
DENZOdata reduction
CCP4data scaling
ROTAVATA)data scaling
CCP4phasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 1997-03-12
    Type: Initial release
  • Version 1.1: 2008-03-25
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance