2ZZG

Crystal structure of alanyl-tRNA synthetase in complex with 5''-O-(N-(L-alanyl)-sulfamyoxyl) adenine without oligomerization domain


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.10 Å
  • R-Value Free: 0.272 
  • R-Value Work: 0.199 
  • R-Value Observed: 0.203 

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Literature

The structure of alanyl-tRNA synthetase with editing domain.

Sokabe, M.Ose, T.Nakamura, A.Tokunaga, K.Nureki, O.Yao, M.Tanaka, I.

(2009) Proc Natl Acad Sci U S A 106: 11028-11033

  • DOI: 10.1073/pnas.0904645106
  • Primary Citation of Related Structures:  
    2ZZE, 2ZZF, 2ZZG

  • PubMed Abstract: 
  • Alanyl-tRNA synthetase (AlaRS) catalyzes synthesis of Ala-tRNA(Ala) and hydrolysis of mis-acylated Ser- and Gly-tRNA(Ala) at 2 different catalytic sites. Here, we describe the monomer structures of C-terminal truncated archaeal AlaRS, with both activation and editing domains in the apo form, in complex with an Ala-AMP analog, and in a high-resolution lysine-methylated form ...

    Alanyl-tRNA synthetase (AlaRS) catalyzes synthesis of Ala-tRNA(Ala) and hydrolysis of mis-acylated Ser- and Gly-tRNA(Ala) at 2 different catalytic sites. Here, we describe the monomer structures of C-terminal truncated archaeal AlaRS, with both activation and editing domains in the apo form, in complex with an Ala-AMP analog, and in a high-resolution lysine-methylated form. The structures show docking of the editing domain to the activation domain opposite from the predicted tRNA-binding surface. Thus, the editing site is positioned >35 A from the activation site, prompting us to model 2 different tRNA complexes: one binding tRNA at the activation site, and the other binding tRNA at the editing site. Interestingly, a gel-shift assay also implies the presence of 2 types of tRNA complex with different mobility. These results suggest that tRNA translocation via a canonical CCA flipping is unlikely to occur in AlaRS. The structure also demonstrated the binding of zinc in the editing site, in which the specific coordination of zinc would be facilitated by a conserved GGQ motif, implying that the editing mechanism may not be the same as in ThrRS. As Asn-194 in eubacterial AlaRS important for Ser misactivation is replaced by Thr-213 in archaeal AlaRS, a different Ser accommodation mechanism is proposed.


    Organizational Affiliation

    Faculty of Advanced Life Sciences, Hokkaido University, Sapporo 060-0810, Japan.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Alanyl-tRNA synthetaseA, B752Pyrococcus horikoshiiMutation(s): 0 
Gene Names: alaSPH0297
EC: 6.1.1.7
UniProt
Find proteins for O58035 (Pyrococcus horikoshii (strain ATCC 700860 / DSM 12428 / JCM 9974 / NBRC 100139 / OT-3))
Explore O58035 
Go to UniProtKB:  O58035
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.10 Å
  • R-Value Free: 0.272 
  • R-Value Work: 0.199 
  • R-Value Observed: 0.203 
  • Space Group: P 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 70.874α = 117.31
b = 89.205β = 90.4
c = 94.905γ = 107.36
Software Package:
Software NamePurpose
REFMACrefinement
HKL-2000data reduction
HKL-2000data scaling
MOLREPphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2009-07-21
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance