6xav

Structural highlights

Function

NUSG_ECOLI Participates in transcription elongation, termination and antitermination. In the absence of Rho, increases the rate of transcription elongation by the RNA polymerase (RNAP), probably by partially suppressing pausing. In the presence of Rho, modulates most Rho-dependent termination events by interacting with the RNAP to render the complex more susceptible to the termination activity of Rho. May be required to overcome a kinetic limitation of Rho to function at certain terminators. Also involved in ribosomal RNA and phage lambda N-mediated transcriptional antitermination.^{[1] [2] [3] [4] [5] [6] [7] [8] [9]}

See Also

• Helicase 3D structures
• RNA polymerase 3D structures

References

1. ↑ Li J, Horwitz R, McCracken S, Greenblatt J. NusG, a new Escherichia coli elongation factor involved in transcriptional antitermination by the N protein of phage lambda. J Biol Chem. 1992 Mar 25;267(9):6012-9. PMID:1532577
2. ↑ Sullivan SL, Gottesman ME. Requirement for E. coli NusG protein in factor-dependent transcription termination. Cell. 1992 Mar 6;68(5):989-94. PMID:1547498
3. ↑ Nehrke KW, Zalatan F, Platt T. NusG alters rho-dependent termination of transcription in vitro independent of kinetic coupling. Gene Expr. 1993;3(2):119-33. PMID:7505669
4. ↑ Li J, Mason SW, Greenblatt J. Elongation factor NusG interacts with termination factor rho to regulate termination and antitermination of transcription. Genes Dev. 1993 Jan;7(1):161-72. PMID:8422985
5. ↑ Burova E, Hung SC, Sagitov V, Stitt BL, Gottesman ME. Escherichia coli NusG protein stimulates transcription elongation rates in vivo and in vitro. J Bacteriol. 1995 Mar;177(5):1388-92. PMID:7868616
6. ↑ Burns CM, Richardson JP. NusG is required to overcome a kinetic limitation to Rho function at an intragenic terminator. Proc Natl Acad Sci U S A. 1995 May 23;92(11):4738-42. PMID:7761393
7. ↑ Zellars M, Squires CL. Antiterminator-dependent modulation of transcription elongation rates by NusB and NusG. Mol Microbiol. 1999 Jun;32(6):1296-304. PMID:10383769
8. ↑ Pasman Z, von Hippel PH. Regulation of rho-dependent transcription termination by NusG is specific to the Escherichia coli elongation complex. Biochemistry. 2000 May 9;39(18):5573-85. PMID:10820031
9. ↑ Torres M, Balada JM, Zellars M, Squires C, Squires CL. In vivo effect of NusB and NusG on rRNA transcription antitermination. J Bacteriol. 2004 Mar;186(5):1304-10. PMID:14973028