2E7Y

High resolution structure of T. maritima tRNase Z

• PDB DOI: https://doi.org/10.2210/pdb2E7Y/pdb

• Classification: HYDROLASE
• Organism(s): Thermotoga maritima
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): No 


• Deposited: 2007-01-15 Released: 2007-09-11 
• Deposition Author(s): Ishii, R., Yokoyama, S., RIKEN Structural Genomics/Proteomics Initiative (RSGI)

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.97 Å
• R-Value Free: 0.249 
• R-Value Work: 0.204 
• R-Value Observed: 0.204 

Starting Model: experimental

Literature

The structure of the flexible arm of Thermotoga maritima tRNase Z differs from those of homologous enzymes

Ishii, R., Minagawa, A., Takaku, H., Takagi, M., Nashimoto, M., Yokoyama, S.

(2007) Acta Crystallogr Sect F Struct Biol Cryst Commun 63: 637-641

• PubMed: 17671357 
• DOI: https://doi.org/10.1107/S1744309107033623
• Primary Citation of Related Structures:  
  2E7Y


• PubMed Abstract: 
  

  tRNA 3'-processing endoribonuclease (tRNase Z) is one of the enzymes involved in the 3'-end processing of precursor tRNAs and is a member of the metallo-beta-lactamase superfamily. tRNase Z crystal structures have revealed that the enzyme forms a dimer and has a characteristic domain, named a flexible arm or an exosite, which protrudes from the metallo-beta-lactamase core and is involved in tRNA binding. The refined structure of Thermotoga maritima tRNase Z has been determined at 1.97 A resolution, revealing the structure of the flexible arm and the zinc-bound active site. The structure of the flexible arm of T. maritima tRNase Z is distinct from those of the Bacillus subtilis and Escherichia coli tRNase Zs. A comparison of the three tRNase Z structures revealed differences in the dimer orientation, which may be related to the unique cleavage-site specificity of T. maritima tRNase Z.

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Organizational Affiliation: 

RIKEN Genomic Sciences Center, Tsurumi, Yokohama 230-0045, Japan.

Biological Assembly 1  

Global Symmetry: Cyclic - C2  (Explore in 3D)
Global Stoichiometry: Homo 2-mer - A2 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 66.19 kDa 
• Atom Count: 4,820 
• Modelled Residue Count: 541 
• Deposited Residue Count: 560 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
tRNase Z	A, B	280	Thermotoga maritima	Mutation(s): 0  EC: 3.1.26.11
UniProt
Find proteins for Q9WZW8 (Thermotoga maritima (strain ATCC 43589 / DSM 3109 / JCM 10099 / NBRC 100826 / MSB8)) Explore Q9WZW8  Go to UniProtKB:  Q9WZW8

Small Molecules

Ligands 3 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
SO4	E [auth A], F [auth A]	SULFATE ION O4 S QAOWNCQODCNURD-UHFFFAOYSA-L
PGO	G [auth A], H [auth A], K [auth B], L [auth B]	S-1,2-PROPANEDIOL C3 H8 O2 DNIAPMSPPWPWGF-VKHMYHEASA-N
ZN	C [auth A], D [auth A], I [auth B], J [auth B]	ZINC ION Zn PTFCDOFLOPIGGS-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.97 Å
• R-Value Free: 0.249 
• R-Value Work: 0.204 
• R-Value Observed: 0.204 
• Space Group: C 2 2 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 150.299	α = 90
b = 172.694	β = 90
c = 64.886	γ = 90

Software Package:

Software Name	Purpose
CNS	refinement
HKL-2000	data collection
HKL-2000	data reduction
SCALEPACK	data scaling
MOLREP	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 2007-09-11 
Deposition Author(s): Ishii, R., Yokoyama, S., RIKEN Structural Genomics/Proteomics Initiative (RSGI)

Revision History  

• Version 1.0: 2007-09-11
  Type: Initial release
  
• Version 1.1: 2011-07-13
  Changes: Version format compliance
• Version 1.2: 2023-10-25
  Changes: Data collection, Database references, Derived calculations, Refinement description