_EC 2.4.2.48 tRNA-guanine(15) transglycosylase. 4 PDB entries  
EC 2.-.-.- Transferases. [17,943 PDB entries]
EC 2.4.-.- Glycosyltransferases. [1,918 PDB entries]
EC 2.4.2.- Pentosyltransferases. [897 PDB entries]
EC 2.4.2.48 tRNA-guanine(15) transglycosylase. [4 PDB entries]    
1iq8

Reaction: Guanine(15) in tRNA + 7-cyano-7-carbaguanine = 7-cyano-7-carbaguanine(15) in tRNA + guanine.
 

Guanine(15) in tRNA
+
7-cyano-7-carbaguanine
= 7-cyano-7-carbaguanine(15) in tRNA
+
guanine
Molecule diagrams generated from .mol files obtained from the KEGG ftp site.

Other name(s): Transfer ribonucleic acid guanine(15) transglycosylase. tRNA guanine(15) transglycosidase.
Comments: Archaeal tRNAs contain the modified nucleoside archaeosine at position 15. This archaeal enzyme catalyzes the exchange of guanine at position 15 of tRNA with the base preQ(0), which is ultimately modified to form the nucleoside archaeosine (cf. Ec 2.6.1.97).
Links:   [IntEnz]   [ExPASy]   [KEGG]  

There are 4 PDB entries in enzyme class E.C.2.4.2.48

  PDB code Protein
1iq8
Crystal structure of archaeosine tRNA-guanine transglycosylase from pyrococcus horikoshii
Source: Pyrococcus horikoshii. Organism_taxid: 53953. Expressed in: escherichia coli bl21(de3). Expression_system_taxid: 469008.
Chains: A, B (577 residues) CATH domains: 3.20.20.105 3.90.1020.10 3.10.450.90 2.30.130.10
1it7
Crystal structure of archaeosine tRNA-guanine transglycosylase complexed with guanine
Source: Pyrococcus horikoshii. Organism_taxid: 53953. Expressed in: escherichia coli bl21(de3). Expression_system_taxid: 469008.
Chains: A, B (577 residues) CATH domains: 3.20.20.105 3.90.1020.10 3.10.450.90 2.30.130.10
1it8
Crystal structure of archaeosine tRNA-guanine transglycosylase from pyrococcus horikoshii complexed with archaeosine precursor, preq0
Source: Pyrococcus horikoshii. Organism_taxid: 53953. Expressed in: escherichia coli bl21(de3). Expression_system_taxid: 469008.
Chains: A, B (577 residues) CATH domains: 3.20.20.105 3.90.1020.10 3.10.450.90 2.30.130.10
1j2b
Crystal structure of archaeosine tRNA-guanine transglycosylase complexed with lambda-form tRNA(val)
Source: Synthetic: yes. Other_details: synthetic tRNA transcript. Sequence from pyrococcus horikoshii. Organism_taxid: 53953. Expressed in: escherichia coli bl21(de3). Expression_system_taxid: 469008.
Chains: A, B (576 residues) CATH domains: 3.20.20.105 3.90.1020.10 3.10.450.90 2.30.130.10