Abstract:
:Little is known about how archaeal viruses perturb the transcription machinery of their hosts. Here we provide the first example of an archaeo-viral transcription factor that directly targets the host RNA polymerase (RNAP) and efficiently represses its activity. ORF145 from the temperate Acidianus two-tailed virus (ATV) forms a high-affinity complex with RNAP by binding inside the DNA-binding channel where it locks the flexible RNAP clamp in one position. This counteracts the formation of transcription pre-initiation complexes in vitro and represses abortive and productive transcription initiation, as well as elongation. Both host and viral promoters are subjected to ORF145 repression. Thus, ORF145 has the properties of a global transcription repressor and its overexpression is toxic for Sulfolobus. On the basis of its properties, we have re-named ORF145 RNAP Inhibitory Protein (RIP).
journal_name
Nat Communjournal_title
Nature communicationsauthors
Sheppard C,Blombach F,Belsom A,Schulz S,Daviter T,Smollett K,Mahieu E,Erdmann S,Tinnefeld P,Garrett R,Grohmann D,Rappsilber J,Werner Fdoi
10.1038/ncomms13595subject
Has Abstractpub_date
2016-11-24 00:00:00pages
13595issn
2041-1723pii
ncomms13595journal_volume
7pub_type
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