Linked Life Data

8319804

Source:http://linkedlifedata.com/resource/pubmed/id/8319804

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
3
pubmed:dateCreated
1993-8-5
pubmed:databankReference
pubmed:abstractText
The genes of aspartyl-tRNA synthetase (AspRS) from two Thermus thermophilus strain VK-1 and HB8, have been cloned and sequenced. Their nucleotidic sequences code for the same protein which displays the three characteristic motifs of class II aminoacyl-tRNA synthetases. This enzyme shows 50% identity with Escherichia coli AspRS, over the totality of the chain (580 amino acids). A comparison with the eukaryotic yeast cytoplasmic AspRS indicates the presence in the prokaryotic AspRS of an extra domain between motifs 2 and 3 much larger than in the eukaryotic ones. When its gene is under the control of the tac promoter of the expression vector pKK223-3, the protein is efficiently overexpressed as a thermostable protein in E. coli. It can be further purified to homogeneity using a heat treatment followed by a single anion exchange chromatography. Single crystals of the pure protein, diffracting at least to 2.2 A resolution (space group P2(1)2(1)2(1), a = 61.4 A, b = 156.1 A, c = 177.3 A) are routinely obtained. The same crystals have previously been described as crystals of threonyl-tRNA synthetase [1].
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Jul
pubmed:issn
0014-5793
pubmed:author
pubmed:issnType
Print
pubmed:day
5
pubmed:volume
325
pubmed:geneSymbol
aspS
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
183-6
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
1993
pubmed:articleTitle
Sequence, overproduction and crystallization of aspartyl-tRNA synthetase from Thermus thermophilus. Implications for the structure of prokaryotic aspartyl-tRNA synthetases.
pubmed:affiliation
Laboratoire de Biochimie, URA 240 CNRS, Ecole Polytechnique, Palaiseau, France.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't