HAMAP annotation rule: MF_01057
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Accession MF_01057
Dates 12-JUN-2003 (Created)
18-OCT-2011 (Last updated, Version 20)
Data class Protein
Names tRNA_methyltr_TrmB



Identifier TRMB
Protein name
RecName: Full=tRNA (guanine-N(7)-)-methyltransferase;
EC=2.1.1.33;
AltName: Full=tRNA (guanine(46)-N(7))-methyltransferase;
AltName: Full=tRNA(m7G46)-methyltransferase;
Gene name trmB
FUNCTION: Catalyzes the formation of N(7)-methylguanine at position 46 (m7G46) in tRNA (By similarity).
CATALYTIC ACTIVITY: S-adenosyl-L-methionine + guanine(46) in tRNA = S-adenosyl-L-homocysteine + N(7)-methylguanine(46) in tRNA.
PATHWAY: tRNA modification; N(7)-methylguanine-tRNA biosynthesis.

case <OC:Enterobacteriaceae>
SUBUNIT: Monomer (By similarity).
end case

SIMILARITY: Belongs to the methyltransferase superfamily. TrmB family.
Pfam PF02390; Methyltransf_4; 1;
TIGRFAMs TIGR00091; TIGR00091; 1;
GO:0008176; Molecular function: tRNA (guanine-N7-)-methyltransferase activity.
GO:0006400; Biological process: tRNA modification.
From: TRMB_ECOLI (P0A8I5)
Key     From     To       Description   Condition   FTGroup
REGION (Optional)     150     155       Interaction with RNA (Potential)   [KR]-[KH]-[EN]-K-R-R  
REGION (Optional)     217     220       Substrate binding (Potential)   T-x-[YF]-E  
BINDING (Optional)     69     69       S-adenosyl-L-methionine (By similarity)   [DE]  
BINDING (Optional)     94     94       S-adenosyl-L-methionine (By similarity)   [DE]  
BINDING (Optional)     121     121       S-adenosyl-L-methionine (By similarity)   [DEN]  
BINDING (Optional)     144     144       S-adenosyl-L-methionine (By similarity)   [DN]  
BINDING (Optional)     148     148       Substrate (By similarity)   K  
BINDING (Optional)     180     180       Substrate (Potential)   D  



Size range: 185-400 amino acids
Related UniRules: None
Template: P0A8I5 (TRMB_ECOLI); O34522 (TRMB_BACSU); P67506 (TRMB_STRPN); O66479 (TRMB_AQUAE): [Recover all]
Scope: Bacteria
Fusion: Nter: hemK, kdtA; Cter: None
Duplicate: None
Plasmid encoded: in SILPO
Comments: Fused to hemK in RICBR, RICCN, RICFE, RICPR and RICTY, and fused to kdtA in FUSNN; Unknown N-terminal domain in METPP; sequences not included in alignment and not taken into account in size range

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