Structural basis for transcription reactivation by RapAStructural basis for transcription reactivation by RapA

Structural highlights

4s20 is a 16 chain structure. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Ligands:,
Activity:DNA-directed RNA polymerase, with EC number 2.7.7.6
Resources:FirstGlance, OCA, RCSB, PDBsum

Function

[K0BU55_ECO1E] Promotes RNA polymerase assembly. Latches the N- and C-terminal regions of the beta' subunit thereby facilitating its interaction with the beta and alpha subunits.[HAMAP-Rule:MF_00366][SAAS:SAAS00054255] [B1X6E7_ECODH] DNA-dependent RNA polymerase catalyzes the transcription of DNA into RNA using the four ribonucleoside triphosphates as substrates.[HAMAP-Rule:MF_00059] [K0BCS5_ECO1E] DNA-dependent RNA polymerase catalyzes the transcription of DNA into RNA using the four ribonucleoside triphosphates as substrates.[HAMAP-Rule:MF_01322][SAAS:SAAS00054030] [K0AVA1_ECO1C] DNA-dependent RNA polymerase catalyzes the transcription of DNA into RNA using the four ribonucleoside triphosphates as substrates.[HAMAP-Rule:MF_01321][RuleBase:RU000432] [RAPA_ECOLI] Transcription regulator that activates transcription by stimulating RNA polymerase (RNAP) recycling in case of stress conditions such as supercoiled DNA or high salt concentrations. Probably acts by releasing the RNAP, when it is trapped or immobilized on tightly supercoiled DNA. Does not activate transcription on linear DNA. Probably not involved in DNA repair (By similarity).[1]

References

  1. Sukhodolets MV, Cabrera JE, Zhi H, Jin DJ. RapA, a bacterial homolog of SWI2/SNF2, stimulates RNA polymerase recycling in transcription. Genes Dev. 2001 Dec 15;15(24):3330-41. PMID:11751638 doi:http://dx.doi.org/10.1101/gad.936701

4s20, resolution 4.70Å

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