IUBMB Enzyme Nomenclature


Accepted name: 16S rRNA pseudouridine516 synthase

Reaction: 16S rRNA uridine516 = 16S rRNA pseudouridine516

For diagram of mechanism click here.

Other name(s): 16S RNA pseudouridine516 synthase; 16S PsiI516 synthase; 16S RNA Ψ516 synthase; RNA pseudouridine synthase RsuA; RsuA; 16S RNA pseudouridine 516 synthase

Systematic name: 16S rRNA-uridine516 uracil mutase

Comments: The enzyme is specific for uridine516 in 16S rRNA. In vitro, the enzyme does not modify free 16S rRNA. The preferred substrate is a 5'-terminal fragment of 16S rRNA complexed with 30S ribosomal proteins [1].

Links to other databases: BRENDA, EXPASY, KEGG, Metacyc, PDB, CAS registry number:


1. Wrzesinski, J., Bakin, A., Nurse, K., Lane, B.G. and Ofengand, J. Purification, cloning, and properties of the 16S RNA pseudouridine 516 synthase from Escherichia coli. Biochemistry 34 (1995) 8904-8913. [PMID: 7612632]

2. Conrad, J., Niu, L., Rudd, K., Lane, B.G. and Ofengand, J. 16S ribosomal RNA pseudouridine synthase RsuA of Escherichia coli: deletion, mutation of the conserved Asp102 residue, and sequence comparison among all other pseudouridine synthases. RNA 5 (1999) 751-763. [PMID: 10376875]

3. Sivaraman, J., Sauve, V., Larocque, R., Stura, E.A., Schrag, J.D., Cygler, M. and Matte, A. Structure of the 16S rRNA pseudouridine synthase RsuA bound to uracil and UMP. Nat. Struct. Biol. 9 (2002) 353-358. [PMID: 11953756]

[EC created 2011]

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