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  Domain Name: EcAspRS_like_N
EcAspRS_like_N: N-terminal, anticodon recognition domain of the type found in Escherichia coli aspartyl-tRNA synthetase (AspRS), the human mitochondrial (mt) AspRS-2, the discriminating (D) Thermus thermophilus AspRS-1, and the nondiscriminating (ND) Helicobacter pylori AspRS. These homodimeric enzymes are class2b aminoacyl-tRNA synthetases (aaRSs). This domain is a beta-barrel domain (OB fold) involved in binding the tRNA anticodon stem-loop. aaRSs catalyze the specific attachment of amino acids (AAs) to their cognate tRNAs during protein biosynthesis. This 2-step reaction involves i) the activation of the AA by ATP in the presence of magnesium ions, followed by ii) the transfer of the activated AA to the terminal ribose of tRNA. In the case of the class2b aaRSs, the activated AA is attached to the 3'OH of the terminal ribose. Eukaryotes contain 2 sets of aaRSs, both of which are encoded by the nuclear genome. One set concerns with cytoplasmic synthesis, whereas the other exclusively with mitochondrial protein synthesis. Human mtAspRS participates in mitochondrial biosynthesis; this enzyme been shown to charge E.coli native tRNAsp in addition to in vitro transcribed human mitochondrial tRNAsp. T. thermophilus is rare among bacteria in having both a D_AspRS and a ND_AspRS. H.pylori ND-AspRS can charge both tRNAASp and tRNAAsn, it is fractionally more efficient at aminoacylating tRNAAsp over tRNAAsn. The H.pylori genome does not contain AsnRS.
No pairwise interactions are available for this conserved domain.

Total Mutations Found: 3
Total Disease Mutations Found: 2
This domain occurred 4 times on human genes (6 proteins).



  LACTATE ELEVATION
  LEUKOENCEPHALOPATHY WITH BRAINSTEM AND SPINAL CORD INVOLVEMENT AND


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Range on the Protein:  

   Protein ID            Protein Position

Domain Position:  


Feature Name:Total Found:
anticodon binding site
dimer interface












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Please Cite: Peterson, T.A., Adadey, A., Santana-Cruz ,I., Sun, Y., Winder A, Kann, M.G., (2010) DMDM: Domain Mapping of Disease Mutations. Bioinformatics 26 (19), 2458-2459.

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