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Gene Review

SCO4425  -  sigma-like protein

Streptomyces coelicolor A3(2)

Synonyms: SCD6.03c, afsR2
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Disease relevance of SCO4425

  • afsR2: a previously undetected gene encoding a 63-amino-acid protein that stimulates antibiotic production in Streptomyces lividans [1].

High impact information on SCO4425

  • We report here the existence of a previously unknown gene, afsR2, which is separate from and adjacent to the AfsR-encoding sequence and which, when present at high copy number, (i) stimulates transcription of biosynthetic and regulatory genes in the actinorhodin gene cluster (act), and (ii) stimulates the synthesis of undecylprodigiosin [1].
  • Modulation of actinorhodin biosynthesis in Streptomyces lividans by glucose repression of afsR2 gene transcription [2].
  • Transcription from the afsR2 promoter during growth in glycerol was dependent on afsR gene function and was developmentally regulated, occurring specifically at the time of aerial mycelium formation and coinciding temporally with the onset of ACT production [2].

Associations of SCO4425 with chemical compounds

  • In liquid media, where morphological differentiation does not occur, ACT production in the absence of glucose increased as S. lividans cells entered stationary phase, but unlike ACT biosynthesis on solid media, occurred by a mechanism that did not require either afsR or afsR2 [2].


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