Annotation rule MF_01084
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General rule information [?]

Accession MF_01084
Dates 3-OCT-2003 (Created)
6-MAY-2013 (Last updated, Version 16)
Name Diphthine_synth
Scope Archaea
Templates O58456 (DPHB_PYRHO); Q9YDI2 (DPHB_AERPE): [Recover all]

Propagated annotation [?]


Identifier, protein and gene names [?]

Identifier
DPHB
Protein name
RecName: Full=Diphthine synthase;
EC=2.1.1.98;
AltName: Full=Diphthamide biosynthesis methyltransferase;
Gene name
dphB

Comments [?]

Function S-adenosyl-L-methionine-dependent methyltransferase that catalyzes the trimethylation of the amino group of the modified target histidine residue in translation elongation factor 2 (EF-2), to form an intermediate called diphthine. The three successive methylation reactions represent the second step of diphthamide biosynthesis (By similarity).
Catalytic activity 3 S-adenosyl-L-methionine + 2-(3-carboxy-3-aminopropyl)-L-histidine-[translation elongation factor 2] = 3 S-adenosyl-L-homocysteine + 2-(3-carboxy-3-(trimethylammonio)propyl)-L-histidine-[translation elongation factor 2].
Pathway Protein modification; peptidyl-diphthamide biosynthesis.
Subunit Homodimer (By similarity).
Similarity Belongs to the diphthine synthase family.

Keywords [?]


Gene Ontology [?]

GO:0004164; Molecular function: diphthine synthase activity.
GO:0017183; Biological process: peptidyl-diphthamide biosynthetic process from peptidyl-histidine.

Cross-references [?]

Pfam PF00590; TP_methylase; 1;
TIGRFAMs TIGR00522; Dph5; 1;
PIRSF PIRSF036432; Diphthine_synth; 1;

Features [?]

From: DPHB_PYRHO (O58456)
Key     From     To       Description   Tag   Condition   FTGroup
REGION     115     116       S-adenosyl-L-methionine binding (By similarity)     [STN]-[IGVA]  
BINDING (Optional)     10     10       S-adenosyl-L-methionine; via carbonyl oxygen (By similarity)     [LI]  
BINDING     87     87       S-adenosyl-L-methionine; via amide nitrogen and carbonyl oxygen (By similarity)     D  
BINDING     90     90       S-adenosyl-L-methionine; via carbonyl oxygen (By similarity)     [VALMTIG]  
BINDING     166     166       S-adenosyl-L-methionine; via amide nitrogen and carbonyl oxygen (By similarity)     [LIV]  
BINDING     209     209       S-adenosyl-L-methionine; via amide nitrogen and carbonyl oxygen (By similarity)     [ALVM]  
BINDING (Optional)     234     234       S-adenosyl-L-methionine; via carbonyl oxygen (By similarity)     [HYQ]  

Additional information [?]

Size range 206-300 amino acids
Related rules None
Fusion None
Comments Possible wrong C-terminal sequence in THEVO