Structural highlights
Function
[RLMD_ECOLI] Catalyzes the formation of 5-methyl-uridine at position 1939 (m5U1939) in 23S rRNA.[HAMAP-Rule:MF_01010][1] [2]
Evolutionary Conservation
Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf.
Publication Abstract from PubMed
RumA catalyzes transfer of a methyl group from S-adenosylmethionine (SAM) specifically to uridine 1939 of 23S ribosomal RNA in Escherichia coli to yield 5-methyluridine. We determined the crystal structure of RumA at 1.95 A resolution. The protein is organized into three structural domains: The N-terminal domain contains sequence homology to the conserved TRAM motif and displays a five-stranded beta barrel architecture characteristic of an oligosaccharide/oligonucleotide binding fold. The central domain contains a [Fe(4)S(4)] cluster coordinated by four conserved cysteine residues. The C-terminal domain displays the typical SAM-dependent methyltransferase fold. The catalytic nucleophile Cys389 lies in a motif different from that in DNA 5-methylcytosine methyltransferases. The electrostatic potential surface reveals a predominately positively charged area that covers the concave surface of the first two domains and suggests an RNA binding mode. The iron-sulfur cluster may be involved in the correct folding of the protein or may have a role in RNA binding.
Crystal structure of RumA, an iron-sulfur cluster containing E. coli ribosomal RNA 5-methyluridine methyltransferase.,Lee TT, Agarwalla S, Stroud RM Structure. 2004 Mar;12(3):397-407. PMID:15016356[3]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
References
- ↑ Agarwalla S, Kealey JT, Santi DV, Stroud RM. Characterization of the 23 S ribosomal RNA m5U1939 methyltransferase from Escherichia coli. J Biol Chem. 2002 Mar 15;277(11):8835-40. Epub 2002 Jan 4. PMID:11779873 doi:10.1074/jbc.M111825200
- ↑ Madsen CT, Mengel-Jorgensen J, Kirpekar F, Douthwaite S. Identifying the methyltransferases for m(5)U747 and m(5)U1939 in 23S rRNA using MALDI mass spectrometry. Nucleic Acids Res. 2003 Aug 15;31(16):4738-46. PMID:12907714
- ↑ Lee TT, Agarwalla S, Stroud RM. Crystal structure of RumA, an iron-sulfur cluster containing E. coli ribosomal RNA 5-methyluridine methyltransferase. Structure. 2004 Mar;12(3):397-407. PMID:15016356 doi:10.1016/j.str.2004.02.009