Global transcriptional regulator Spx

UniProtKB accession:  O31602

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UniProtKB description:  Global transcriptional regulator that plays a key role in stress response and exerts either positive or negative regulation of genes (PubMed:12642660, PubMed:15659166, PubMed:16885442, PubMed:18662407, PubMed:18687074, PubMed:29271514). Acts by interacting with the C-terminal domain of the alpha subunit of the RNA polymerase (RNAP) (PubMed:12642660, PubMed:15659166, PubMed:18687074, PubMed:20084284). This interaction can enhance binding of RNAP to the promoter region of target genes and stimulate their transcription, or block interaction of RNAP with activator proteins and repress transcription (PubMed:12642660, PubMed:15659166, PubMed:18687074, PubMed:20084284). Exhibits no DNA-binding activity (PubMed:15659166, PubMed:18687074).