MST1/YKL194C Summary Help

Standard Name MST1 1
Systematic Name YKL194C
Feature Type ORF, Verified
Description Mitochondrial threonyl-tRNA synthetase; aminoacylates both the canonical threonine tRNA tT(UGU)Q1 and the unusual threonine tRNA tT(UAG)Q2 in vitro (1, 2, 3, 4 and see Summary Paragraph)
Name Description Mitochondrial aminoacyl-tRNA Synthetase, Threonine 1
Chromosomal Location
ChrXI:78646 to 77258 | ORF Map | GBrowse
Note: this feature is encoded on the Crick strand.
Gbrowse
Gene Ontology Annotations All MST1 GO evidence and references
  View Computational GO annotations for MST1
Molecular Function
Manually curated
Biological Process
Manually curated
Cellular Component
Manually curated
High-throughput
Regulators 4 genes
Resources
Classical genetics
null
Large-scale survey
null
Resources
25 total interaction(s) for 24 unique genes/features.
Physical Interactions
  • Affinity Capture-MS: 1
  • Affinity Capture-RNA: 2
  • Co-crystal Structure: 1
  • Protein-RNA: 15

Genetic Interactions
  • Negative Genetic: 1
  • Synthetic Growth Defect: 4
  • Synthetic Lethality: 1

Resources
Expression Summary
histogram
Resources
Length (a.a.) 462
Molecular Weight (Da) 54,092
Isoelectric Point (pI) 8.83
Localization
Phosphorylation PhosphoGRID | PhosphoPep Database
Structure
Homologs
sequence information
ChrXI:78646 to 77258 | ORF Map | GBrowse
Note: this feature is encoded on the Crick strand.
SGD ORF map
Last Update Coordinates: 2011-02-03 | Sequence: 1996-07-31
Subfeature details
Relative
Coordinates
Chromosomal
Coordinates
Most Recent Updates
Coordinates Sequence
CDS 1..1389 78646..77258 2011-02-03 1996-07-31
Retrieve sequences
Analyze Sequence
S288C only
S288C vs. other species
S288C vs. other strains
Resources
External Links All Associated Seq | E.C. | Entrez Gene | Entrez RefSeq Protein | MIPS | Search all NCBI (Entrez) | UniProtKB
Primary SGDIDS000001677
SUMMARY PARAGRAPH for MST1

About aminoacyl-tRNA synthetases...

In a process critical for accurate translation of the genetic code, aminoacyl-tRNA synthetases (aka aminoacyl-tRNA ligases) attach amino acids specifically to cognate tRNAs, thereby "charging" the tRNAs. The catalysis is accomplished via a two-step mechanism. First, the synthetase activates the amino acid in an ATP-dependent reaction, producing aminoacyl-adenylate and releasing inorganic pyrophosphate (PPi). Second, the enzyme binds the correct tRNA and transfers the activated amino acid to either the 2' or 3' terminal hydroxyl group of the tRNA, forming the aminoacyl-tRNA and AMP (5, 6 and references therein).

Aminoacyl-tRNA synthetases possess precise substrate specificity and, despite their similarity in function, vary in size, primary sequence and subunit composition. Individual members of the aminoacyl-tRNA synthetase family can be categorized in one of two classes, depending on amino acid specificity. Class I enzymes (those specific for Glu, Gln, Arg, Cys, Met, Val, Ile, Leu, Tyr and Trp) typically contain two highly conserved sequence motifs, are monomeric or dimeric, and aminoacylate at the 2' terminal hydroxyl of the appropriate tRNA. Class II enzymes (those specific for Gly, Ala, Pro, Ser, Thr, His, Asp, Asn, Lys and Phe) typically contain three highly conserved sequence motifs, are dimeric or tetrameric, and aminoacylate at the 3' terminal hydroxyl of the appropriate tRNA (5, 6, 7 and references therein).

Last updated: 2008-07-14 Contact SGD

References cited on this page View Complete Literature Guide for MST1
1) Pape LK, et al.  (1985) Characterization of a yeast nuclear gene (MST1) coding for the mitochondrial threonyl-tRNA1 synthetase. J Biol Chem 260(28):15362-70
2) Pape LK and Tzagoloff A  (1985) Cloning and characterization of the gene for the yeast cytoplasmic threonyl-tRNA synthetase. Nucleic Acids Res 13(17):6171-83
3) Su D, et al.  (2011) An unusual tRNAThr derived from tRNAHis reassigns in yeast mitochondria the CUN codons to threonine. Nucleic Acids Res 39(11):4866-74
4) Ling J, et al.  (2012) Yeast mitochondrial threonyl-tRNA synthetase recognizes tRNA isoacceptors by distinct mechanisms and promotes CUN codon reassignment. Proc Natl Acad Sci U S A 109(9):3281-6
5) Delarue M  (1995) Aminoacyl-tRNA synthetases. Curr Opin Struct Biol 5(1):48-55
6) Arnez JG and Moras D  (1997) Structural and functional considerations of the aminoacylation reaction. Trends Biochem Sci 22(6):211-6
7) Eriani G, et al.  (1990) Partition of tRNA synthetases into two classes based on mutually exclusive sets of sequence motifs. Nature 347(6289):203-6