PMID- 17662836 OWN - NLM STAT- MEDLINE DCOM- 20070914 LR - 20231127 IS - 0076-6879 (Print) IS - 0076-6879 (Linking) VI - 424 DP - 2007 TI - RNA editing uridylyltransferases of trypanosomatids. PG - 55-73 AB - Terminal RNA uridylyltransferases (TUTases) catalyze the transfer of UMP residues to the 3' hydroxyl group of RNA. These enzymes belong to the DNA polymerase beta superfamily, which also includes poly(A) polymerases, CCA-adding enzymes, and other nucleotidyltransferases. Studies of uridylyl insertion/deletion RNA editing in mitochondria of trypanosomatids provided the first examples of biological functions for TUTases: posttranscriptional uridylylation of guide RNAs by RNA editing TUTase 1 (RET1) and U-insertion mRNA editing by RNA editing TUTase 2 (RET2). The editing TUTases are unified by the presence of conserved catalytic and nucleotide base recognition domains, yet differ substantially in auxiliary function-specific domains, quaternary structure, RNA substrate specificity, and processivity. This chapter describes isolation of TUTases and their complexes from trypanosomatids, methods used for analysis of interactions involving RET1 and RET2, purification of recombinant proteins, and enzyme kinetic assays. FAU - Aphasizhev, Ruslan AU - Aphasizhev R AD - Department of Microbiology and Molecular Genetics, University of California, Irvine, California, USA. FAU - Aphasizheva, Inna AU - Aphasizheva I LA - eng GR - AI064653/AI/NIAID NIH HHS/United States PT - Journal Article PT - Research Support, N.I.H., Extramural PL - United States TA - Methods Enzymol JT - Methods in enzymology JID - 0212271 RN - 0 (Protozoan Proteins) RN - 0 (Recombinant Proteins) RN - EC 2.7.7.- (RNA Nucleotidyltransferases) RN - EC 2.7.7.- (UTP-RNA uridylyltransferase) RN - EC 3.4.25.1 (Proteasome Endopeptidase Complex) SB - IM MH - Animals MH - Biochemistry/methods MH - Chromatography MH - Leishmania/*metabolism MH - Proteasome Endopeptidase Complex/metabolism MH - Protein Interaction Mapping MH - Protozoan Proteins/metabolism MH - *RNA Editing MH - RNA Nucleotidyltransferases/chemistry/genetics/*metabolism MH - RNA Processing, Post-Transcriptional MH - Recombinant Proteins/metabolism MH - Trypanosoma brucei brucei/*metabolism EDAT- 2007/07/31 09:00 MHDA- 2007/09/15 09:00 CRDT- 2007/07/31 09:00 PHST- 2007/07/31 09:00 [pubmed] PHST- 2007/09/15 09:00 [medline] PHST- 2007/07/31 09:00 [entrez] AID - S0076-6879(07)24003-0 [pii] AID - 10.1016/S0076-6879(07)24003-0 [doi] PST - ppublish SO - Methods Enzymol. 2007;424:55-73. doi: 10.1016/S0076-6879(07)24003-0.