PMID- 11747308 OWN - NLM STAT- MEDLINE DCOM- 20020221 LR - 20131121 IS - 0003-9861 (Print) IS - 0003-9861 (Linking) VI - 397 IP - 1 DP - 2002 Jan 1 TI - Maize seryl-tRNA synthetase: specificity of substrate recognition by the organellar enzyme. PG - 40-50 AB - In our study of seryl-tRNA formation in maize, we investigated the enzymes involved in serylation. Only two dissimilar seryl-tRNA synthetase (SerRS) cDNA clones were identified in the Zea mays EST (expressed sequence tag) databases. One encodes a seryl-tRNA synthetase, which presumably functions in the organelles (SerZMm), while the other synthetase product is more similar to eukaryotic cytosolic counterparts (SerZMc). The expression of SerZMm in Saccharomyces cerevisiae resulted in complementation of mutant respiratory phenotype, caused by a disruption of the nuclear gene, presumably encoding yeast mitochondrial seryl-tRNA synthetase (SerSCm). Purified mature SerZMm displays tRNA-assisted serine activation and aminoacylates maize mitochondrial and chloroplast tRNA(Ser) transcripts with similar efficiencies, raising the possibility that only two isoforms of seryl-tRNA synthetase may be sufficient to catalyze seryl-tRNA(Ser) formation in three cellular compartments of Zea mays. Phylogenetic analysis suggests that SerZMm is of mitochondrial origin. FAU - Rokov-Plavec, Jasmina AU - Rokov-Plavec J AD - Department of Chemistry, Faculty of Science, University of Zagreb, Strossmayerov trg 14, 10000 Zagreb, Croatia. FAU - Lesjak, Sonja AU - Lesjak S FAU - Landeka, Irena AU - Landeka I FAU - Mijakovic, Ivan AU - Mijakovic I FAU - Weygand-Durasevic, Ivana AU - Weygand-Durasevic I LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - United States TA - Arch Biochem Biophys JT - Archives of biochemistry and biophysics JID - 0372430 RN - 0 (DNA, Complementary) RN - 0 (Protein Isoforms) RN - 452VLY9402 (Serine) RN - 9014-25-9 (RNA, Transfer) RN - EC 6.1.1.11 (Serine-tRNA Ligase) SB - IM MH - Amino Acid Sequence MH - Base Sequence MH - Chloroplasts/metabolism MH - Cytosol/enzymology MH - DNA, Complementary/metabolism MH - Databases as Topic MH - Electrophoresis, Polyacrylamide Gel MH - Evolution, Molecular MH - Expressed Sequence Tags MH - Genetic Complementation Test MH - Kinetics MH - Mitochondria/metabolism MH - Molecular Sequence Data MH - Mutation MH - Nucleic Acid Conformation MH - Phenotype MH - Phylogeny MH - Protein Isoforms MH - RNA, Transfer/chemistry MH - Saccharomyces cerevisiae/metabolism MH - Sequence Homology, Amino Acid MH - Serine/metabolism MH - Serine-tRNA Ligase/*chemistry MH - Substrate Specificity MH - Zea mays/*enzymology EDAT- 2001/12/19 10:00 MHDA- 2002/02/22 10:01 CRDT- 2001/12/19 10:00 PHST- 2001/12/19 10:00 [pubmed] PHST- 2002/02/22 10:01 [medline] PHST- 2001/12/19 10:00 [entrez] AID - S0003986101926001 [pii] AID - 10.1006/abbi.2001.2600 [doi] PST - ppublish SO - Arch Biochem Biophys. 2002 Jan 1;397(1):40-50. doi: 10.1006/abbi.2001.2600.