View source for 5ms0


==pseudo-atomic model of the RNA polymerase lambda-based antitermination complex solved by cryo-EM==
<SX load='5ms0' size='340' side='right' viewer='molstar' caption='[[5ms0]], [[Resolution|resolution]] 9.80&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[5ms0]] is a 14 chain structure with sequence from [http://en.wikipedia.org/wiki/ ] and [http://en.wikipedia.org/wiki/"bacillus_coli"_migula_1895 "bacillus coli" migula 1895]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=5MS0 OCA]. For a <b>guided tour on the structure components</b> use [http://proteopedia.org/fgij/fg.htm?mol=5MS0 FirstGlance]. <br>
</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene>, <scene name='pdbligand=ZN:ZINC+ION'>ZN</scene></td></tr>
<tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">N, lambdap49 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=562 "Bacillus coli" Migula 1895]), nusB, groNB, ssyB, b0416, JW0406 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=562 "Bacillus coli" Migula 1895]), nusA, b3169, JW3138 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=562 "Bacillus coli" Migula 1895]), rpoZ, b3649, JW3624 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=562 "Bacillus coli" Migula 1895]), rpoA, pez, phs, sez, b3295, JW3257 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=562 "Bacillus coli" Migula 1895]), rpoB, groN, nitB, rif, ron, stl, stv, tabD, b3987, JW3950 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=562 "Bacillus coli" Migula 1895]), rpoC, tabB, b3988, JW3951 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=562 "Bacillus coli" Migula 1895]), rpsJ, nusE, b3321, JW3283 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=562 "Bacillus coli" Migula 1895]), nusG, b3982, JW3945 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=562 "Bacillus coli" Migula 1895])</td></tr>
<tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/DNA-directed_RNA_polymerase DNA-directed RNA polymerase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.7.7.6 2.7.7.6] </span></td></tr>
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://proteopedia.org/fgij/fg.htm?mol=5ms0 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=5ms0 OCA], [http://pdbe.org/5ms0 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=5ms0 RCSB], [http://www.ebi.ac.uk/pdbsum/5ms0 PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=5ms0 ProSAT]</span></td></tr>
</table>
== Function ==
[[http://www.uniprot.org/uniprot/RS10_ECOLI RS10_ECOLI]] Involved in the binding of tRNA to the ribosomes.[HAMAP-Rule:MF_00508] [[http://www.uniprot.org/uniprot/NUSB_ECOLI NUSB_ECOLI]] One of the proteins essential for the formation of the RNA polymerase antitermination complex in the presence of lambda phage N protein. However, it is involved in the transcription termination process at certain sites during normal bacterial growth. Binds to the BoxA RNA motif. [[http://www.uniprot.org/uniprot/RPOA_ECOLI RPOA_ECOLI]] DNA-dependent RNA polymerase catalyzes the transcription of DNA into RNA using the four ribonucleoside triphosphates as substrates. This subunit plays an important role in subunit assembly since its dimerization is the first step in the sequential assembly of subunits to form the holoenzyme.[HAMAP-Rule:MF_00059] [[http://www.uniprot.org/uniprot/NUSG_ECOLI 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.<ref>PMID:1532577</ref> <ref>PMID:1547498</ref> <ref>PMID:7505669</ref> <ref>PMID:8422985</ref> <ref>PMID:7868616</ref> <ref>PMID:7761393</ref> <ref>PMID:10383769</ref> <ref>PMID:10820031</ref> <ref>PMID:14973028</ref>  [[http://www.uniprot.org/uniprot/NUSA_ECOLI NUSA_ECOLI]] Participates in both transcription termination and antitermination. Involved in a variety of cellular and viral termination and antitermination processes, such as Rho-dependent transcriptional termination, intrinsic termination, and phage lambda N-mediated transcriptional antitermination. Also important for coordinating the cellular responses to DNA damage by coupling the processes of nucleotide excision repair and translesion synthesis to transcription.<ref>PMID:6263495</ref> <ref>PMID:6265785</ref> <ref>PMID:6199039</ref> <ref>PMID:2821282</ref> <ref>PMID:7536848</ref> <ref>PMID:9139668</ref> <ref>PMID:11719185</ref> <ref>PMID:20696893</ref> <ref>PMID:21922055</ref>  [[http://www.uniprot.org/uniprot/REGN_LAMBD REGN_LAMBD]] Antitermination proteins positively regulate expression of the phage early and late gene operons. Bacterial host RNA polymerase modified by these antitermination proteins transcribes through termination sites that otherwise prevent expression of the regulated genes.  N protein regulates the transition from the early to the middle stage of lytic development. It is a transcription antitermination protein that prevents termination at the rho-dependent tL and tR transcription termination sites. [[http://www.uniprot.org/uniprot/RPOB_ECOLI RPOB_ECOLI]] DNA-dependent RNA polymerase catalyzes the transcription of DNA into RNA using the four ribonucleoside triphosphates as substrates.[HAMAP-Rule:MF_01321] [[http://www.uniprot.org/uniprot/RPOZ_ECOLI RPOZ_ECOLI]] 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] [[http://www.uniprot.org/uniprot/RPOC_ECOLI RPOC_ECOLI]] DNA-dependent RNA polymerase catalyzes the transcription of DNA into RNA using the four ribonucleoside triphosphates as substrates.[HAMAP-Rule:MF_01322] 
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== Publication Abstract from PubMed ==
lambdaN-mediated processive antitermination constitutes a paradigmatic transcription regulatory event, during which phage protein lambdaN, host factors NusA, NusB, NusE and NusG, and an RNA nut site render elongating RNA polymerase termination-resistant. The structural basis of the process has so far remained elusive. Here we describe a crystal structure of a lambdaN-NusA-NusB-NusE-nut site complex and an electron cryo-microscopic structure of a complete transcription antitermination complex, comprising RNA polymerase, DNA, nut site RNA, all Nus factors and lambdaN, validated by crosslinking/mass spectrometry. Due to intrinsic disorder, lambdaN can act as a multiprotein/RNA interaction hub, which, together with nut site RNA, arranges NusA, NusB and NusE into a triangular complex. This complex docks via the NusA N-terminal domain and the lambdaN C-terminus next to the RNA exit channel on RNA polymerase. Based on the structures, comparative crosslinking analyses and structure-guided mutagenesis, we hypothesize that lambdaN mounts a multipronged strategy to reprogram the transcriptional machinery, which may include (1) the lambdaN C terminus clamping the RNA exit channel, thus stabilizing the DNA:RNA hybrid; (2) repositioning of NusA and RNAP elements, thus redirecting nascent RNA and sequestering the upstream branch of a terminator hairpin; and (3) hindering RNA engagement of termination factor rho and/or obstructing rho translocation on the transcript.

Structural basis for lambdaN-dependent processive transcription antitermination.,Said N, Krupp F, Anedchenko E, Santos KF, Dybkov O, Huang YH, Lee CT, Loll B, Behrmann E, Burger J, Mielke T, Loerke J, Urlaub H, Spahn CMT, Weber G, Wahl MC Nat Microbiol. 2017 Apr 28;2:17062. doi: 10.1038/nmicrobiol.2017.62. PMID:28452979<ref>PMID:28452979</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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==See Also==
*[[RNA polymerase 3D structures|RNA polymerase 3D structures]]
== References ==
<references/>
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</SX>
[[Category: Bacillus coli migula 1895]]
[[Category: DNA-directed RNA polymerase]]
[[Category: Large Structures]]
[[Category: Krupp, F]]
[[Category: Said, N]]
[[Category: Antitermination]]
[[Category: Bacterial transcription]]
[[Category: Dna-dependent rna polymerase]]
[[Category: Ternary elongation complex]]
[[Category: Transcription-dna-rna complex]]
[[Category: Transcription/dna/rna]]