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Analysis and DNA sequence of the osmoregulated treA gene encoding the periplasmic trehalase of Escherichia coli K12.
Mol Gen Genet. 1989 Jun; 217(2-3):347-54.MG

Abstract

The treA gene of Escherichia coli K12 codes for a periplasmic trehalase that is induced by growth at high osmolarity. The position of treA within a cloned chromosomal DNA fragment was identified by subcloning of restriction fragments and analysis of the gene product in minicells. The nucleotide sequence of the treA coding region as well as its upstream control region was determined. The treA gene consists of 1695 bp encoding 565 amino acids. The amino-terminus of the mature trehalase was found to begin with the amino acid Glu at position 31 of the open reading frame. The first 30 amino acids resemble a typical signal sequence, consistent with trehalase being a secreted periplasmic enzyme. Two previously isolated phoA fusions to the osmA gene were transferred by homologous recombination on to a treA-containing plasmid and found to be within treA. Analysis of the hybrid genes and their gene products aided the localization of treA and the determination of its direction of transcription within the cloned chromosomal segment. The treA-phoA fusions encoded hybrid proteins which could be found in the periplasm. We found that at high osmolarity the normal pathway for the uptake and utilization of trehalose is blocked. Therefore, the function of the periplasmic trehalase is to provide the cell with the ability to utilize trehalose at high osmolarity by splitting it into glucose molecules that can subsequently be taken up by the phosphotransferase-mediated uptake system.

Authors+Show Affiliations

Centre de Recherche de Biochimie et de Genetique Cellulaire du C.N.R.S., Toulouse, France.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

2671658

Citation

Gutierrez, C, et al. "Analysis and DNA Sequence of the Osmoregulated treA Gene Encoding the Periplasmic Trehalase of Escherichia Coli K12." Molecular & General Genetics : MGG, vol. 217, no. 2-3, 1989, pp. 347-54.
Gutierrez C, Ardourel M, Bremer E, et al. Analysis and DNA sequence of the osmoregulated treA gene encoding the periplasmic trehalase of Escherichia coli K12. Mol Gen Genet. 1989;217(2-3):347-54.
Gutierrez, C., Ardourel, M., Bremer, E., Middendorf, A., Boos, W., & Ehmann, U. (1989). Analysis and DNA sequence of the osmoregulated treA gene encoding the periplasmic trehalase of Escherichia coli K12. Molecular & General Genetics : MGG, 217(2-3), 347-54.
Gutierrez C, et al. Analysis and DNA Sequence of the Osmoregulated treA Gene Encoding the Periplasmic Trehalase of Escherichia Coli K12. Mol Gen Genet. 1989;217(2-3):347-54. PubMed PMID: 2671658.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Analysis and DNA sequence of the osmoregulated treA gene encoding the periplasmic trehalase of Escherichia coli K12. AU - Gutierrez,C, AU - Ardourel,M, AU - Bremer,E, AU - Middendorf,A, AU - Boos,W, AU - Ehmann,U, PY - 1989/6/1/pubmed PY - 1989/6/1/medline PY - 1989/6/1/entrez SP - 347 EP - 54 JF - Molecular & general genetics : MGG JO - Mol Gen Genet VL - 217 IS - 2-3 N2 - The treA gene of Escherichia coli K12 codes for a periplasmic trehalase that is induced by growth at high osmolarity. The position of treA within a cloned chromosomal DNA fragment was identified by subcloning of restriction fragments and analysis of the gene product in minicells. The nucleotide sequence of the treA coding region as well as its upstream control region was determined. The treA gene consists of 1695 bp encoding 565 amino acids. The amino-terminus of the mature trehalase was found to begin with the amino acid Glu at position 31 of the open reading frame. The first 30 amino acids resemble a typical signal sequence, consistent with trehalase being a secreted periplasmic enzyme. Two previously isolated phoA fusions to the osmA gene were transferred by homologous recombination on to a treA-containing plasmid and found to be within treA. Analysis of the hybrid genes and their gene products aided the localization of treA and the determination of its direction of transcription within the cloned chromosomal segment. The treA-phoA fusions encoded hybrid proteins which could be found in the periplasm. We found that at high osmolarity the normal pathway for the uptake and utilization of trehalose is blocked. Therefore, the function of the periplasmic trehalase is to provide the cell with the ability to utilize trehalose at high osmolarity by splitting it into glucose molecules that can subsequently be taken up by the phosphotransferase-mediated uptake system. SN - 0026-8925 UR - https://www.unboundmedicine.com/medline/citation/2671658/Analysis_and_DNA_sequence_of_the_osmoregulated_treA_gene_encoding_the_periplasmic_trehalase_of_Escherichia_coli_K12_ L2 - https://doi.org/10.1007/BF02464903 DB - PRIME DP - Unbound Medicine ER -