A Tn551 insertional mutation in the accessory gene regulator (agr) locus of the Staphylococcus aureus chromosome resulted in the decreased production of at least seven extracellular toxins and enzymes and a simultaneous increase in the production of protein A and coagulase (Recsei et al. 1986). Adjacent to this locus we have now identified another gene, hld, transcribed into a 0.5 kb RNA which codes for the staphylococcal delta-lysin. The expression of hld was totally repressed in a strain carrying the agr insertional mutation. Hybridization with strand-specific probes and primer extension analysis revealed that hld and agr are transcribed in opposite directions, starting 188 nucleotides apart. The hld gene is mainly expressed during the post-exponential growth phase and is totally repressed during early exponential growth. Determination of hld mRNA half-life in different growth phases indicated that this regulation is at the level of transcription.
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| rdf:type | |
| rdfs:comment |
A Tn551 insertional mutation in the accessory gene regulator (agr) locus of the Staphylococcus aureus chromosome resulted in the decreased production of at least seven extracellular toxins and enzymes and a simultaneous increase in the production of protein A and coagulase (Recsei et al. 1986). Adjacent to this locus we have now identified another gene, hld, transcribed into a 0.5 kb RNA which codes for the staphylococcal delta-lysin. The expression of hld was totally repressed in a strain carrying the agr insertional mutation. Hybridization with strand-specific probes and primer extension analysis revealed that hld and agr are transcribed in opposite directions, starting 188 nucleotides apart. The hld gene is mainly expressed during the post-exponential growth phase and is totally repressed during early exponential growth. Determination of hld mRNA half-life in different growth phases indicated that this regulation is at the level of transcription.
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| skos:exactMatch | |
| uniprot:name |
Mol. Gen. Genet.
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| uniprot:author |
Arvidson S.,
Janzon L.,
Loefdahl S.
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| uniprot:date |
1989
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| uniprot:pages |
480-485
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| uniprot:title |
Identification and nucleotide sequence of the delta-lysin gene, hld, adjacent to the accessory gene regulator (agr) of Staphylococcus aureus.
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| uniprot:volume |
219
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| dc-term:identifier |
doi:10.1007/BF00259623
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