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Title: Recognition of Ribosomal Protein L11 by the Protein Trimethyltransferase PrmA

Abstract

Bacterial ribosomal protein L11 is post-translationally trimethylated at multiple residues by a single methyltransferase, PrmA. Here, we describe four structures of PrmA from the extreme thermophile Thermus thermophilus. Two apo-PrmA structures at 1.59 and 2.3 {angstrom} resolution and a third with bound cofactor S-adenosyl-L-methionine at 1.75 {angstrom} each exhibit distinct relative positions of the substrate recognition and catalytic domains, revealing how PrmA can position the L11 substrate for multiple, consecutive side-chain methylation reactions. The fourth structure, the PrmA-L11 enzyme-substrate complex at 2.4 {angstrom} resolution, illustrates the highly specific interaction of the N-terminal domain with its substrate and places Lys39 in the PrmA active site. The presence of a unique flexible loop in the cofactor-binding site suggests how exchange of AdoMet with the reaction product S-adenosyl-L-homocysteine can occur without necessitating the dissociation of PrmA from L11. Finally, the mode of interaction of PrmA with L11 explains its observed preference for L11 as substrate before its assembly into the 50S ribosomal subunit.

Authors:
; ; ;
Publication Date:
Research Org.:
Brookhaven National Laboratory (BNL) National Synchrotron Light Source
Sponsoring Org.:
Doe - Office Of Science
OSTI Identifier:
929859
Report Number(s):
BNL-80425-2008-JA
Journal ID: ISSN 0261-4189; EMJODG; TRN: US200822%%1052
DOE Contract Number:  
DE-AC02-98CH10886
Resource Type:
Journal Article
Resource Relation:
Journal Name: EMBO Journal; Journal Volume: 26
Country of Publication:
United States
Language:
English
Subject:
59 BASIC BIOLOGICAL SCIENCES; BACTERIA; CELL CONSTITUENTS; DISSOCIATION; ENZYMES; INTERACTIONS; METHYLATION; PROTEINS; RESIDUES; SUBSTRATES; national synchrotron light source

Citation Formats

Demirci,H., Gregory, S., Dahlberg, A., and Jogl, G. Recognition of Ribosomal Protein L11 by the Protein Trimethyltransferase PrmA. United States: N. p., 2007. Web. doi:10.1038/sj.emboj.7601508.
Demirci,H., Gregory, S., Dahlberg, A., & Jogl, G. Recognition of Ribosomal Protein L11 by the Protein Trimethyltransferase PrmA. United States. doi:10.1038/sj.emboj.7601508.
Demirci,H., Gregory, S., Dahlberg, A., and Jogl, G. Mon . "Recognition of Ribosomal Protein L11 by the Protein Trimethyltransferase PrmA". United States. doi:10.1038/sj.emboj.7601508.
@article{osti_929859,
title = {Recognition of Ribosomal Protein L11 by the Protein Trimethyltransferase PrmA},
author = {Demirci,H. and Gregory, S. and Dahlberg, A. and Jogl, G.},
abstractNote = {Bacterial ribosomal protein L11 is post-translationally trimethylated at multiple residues by a single methyltransferase, PrmA. Here, we describe four structures of PrmA from the extreme thermophile Thermus thermophilus. Two apo-PrmA structures at 1.59 and 2.3 {angstrom} resolution and a third with bound cofactor S-adenosyl-L-methionine at 1.75 {angstrom} each exhibit distinct relative positions of the substrate recognition and catalytic domains, revealing how PrmA can position the L11 substrate for multiple, consecutive side-chain methylation reactions. The fourth structure, the PrmA-L11 enzyme-substrate complex at 2.4 {angstrom} resolution, illustrates the highly specific interaction of the N-terminal domain with its substrate and places Lys39 in the PrmA active site. The presence of a unique flexible loop in the cofactor-binding site suggests how exchange of AdoMet with the reaction product S-adenosyl-L-homocysteine can occur without necessitating the dissociation of PrmA from L11. Finally, the mode of interaction of PrmA with L11 explains its observed preference for L11 as substrate before its assembly into the 50S ribosomal subunit.},
doi = {10.1038/sj.emboj.7601508},
journal = {EMBO Journal},
number = ,
volume = 26,
place = {United States},
year = {Mon Jan 01 00:00:00 EST 2007},
month = {Mon Jan 01 00:00:00 EST 2007}
}