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| | ==Core UvrA/TRCF complex== | | ==Core UvrA/TRCF complex== |
| - | <StructureSection load='4dfc' size='340' side='right' caption='[[4dfc]], [[Resolution|resolution]] 2.80Å' scene=''> | + | <StructureSection load='4dfc' size='340' side='right'caption='[[4dfc]], [[Resolution|resolution]] 2.80Å' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[4dfc]] is a 4 chain structure with sequence from [http://en.wikipedia.org/wiki/Ecoli Ecoli]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4DFC OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4DFC FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[4dfc]] is a 4 chain structure with sequence from [https://en.wikipedia.org/wiki/Escherichia_coli_K-12 Escherichia coli K-12]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4DFC OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=4DFC FirstGlance]. <br> |
| - | </td></tr><tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">b1114, Escherichia coli, JW1100, mfd ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=83333 ECOLI]), b4058, dinE, Escherichia coli, JW4019, uvrA ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=83333 ECOLI])</td></tr> | + | </td></tr><tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=4dfc FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4dfc OCA], [https://pdbe.org/4dfc PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=4dfc RCSB], [https://www.ebi.ac.uk/pdbsum/4dfc PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=4dfc ProSAT]</span></td></tr> |
| - | <tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Adenosinetriphosphatase Adenosinetriphosphatase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.6.1.3 3.6.1.3] </span></td></tr>
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| - | <tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4dfc FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4dfc OCA], [http://pdbe.org/4dfc PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=4dfc RCSB], [http://www.ebi.ac.uk/pdbsum/4dfc PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=4dfc ProSAT]</span></td></tr> | + | |
| | </table> | | </table> |
| | == Function == | | == Function == |
| - | [[http://www.uniprot.org/uniprot/MFD_ECOLI MFD_ECOLI]] Couples transcription and DNA repair by recognizing RNA polymerase (RNAP) stalled at DNA lesions. Mediates ATP-dependent release of RNAP and its truncated transcript from the DNA, and recruitment of nucleotide excision repair machinery to the damaged site. Can also dissociate RNAP that is blocked by low concentration of nucleoside triphosphates or by physical obstruction, such as bound proteins. In addition, can rescue arrested complexes by promoting forward translocation. Has ATPase activity, which is required for removal of stalled RNAP, but seems to lack helicase activity. May act through a translocase activity that rewinds upstream DNA, leading either to translocation or to release of RNAP when the enzyme active site can not continue elongation.<ref>PMID:8465200</ref> <ref>PMID:7876261</ref> <ref>PMID:7876262</ref> <ref>PMID:12086674</ref> <ref>PMID:19700770</ref> [[http://www.uniprot.org/uniprot/UVRA_ECOLI UVRA_ECOLI]] The UvrABC repair system catalyzes the recognition and processing of DNA lesions. UvrA is an ATPase and a DNA-binding protein. A damage recognition complex composed of 2 UvrA and 2 UvrB subunits scans DNA for abnormalities. When the presence of a lesion has been verified by UvrB, the UvrA molecules dissociate.[HAMAP-Rule:MF_00205] | + | [[https://www.uniprot.org/uniprot/MFD_ECOLI MFD_ECOLI]] Couples transcription and DNA repair by recognizing RNA polymerase (RNAP) stalled at DNA lesions. Mediates ATP-dependent release of RNAP and its truncated transcript from the DNA, and recruitment of nucleotide excision repair machinery to the damaged site. Can also dissociate RNAP that is blocked by low concentration of nucleoside triphosphates or by physical obstruction, such as bound proteins. In addition, can rescue arrested complexes by promoting forward translocation. Has ATPase activity, which is required for removal of stalled RNAP, but seems to lack helicase activity. May act through a translocase activity that rewinds upstream DNA, leading either to translocation or to release of RNAP when the enzyme active site can not continue elongation.<ref>PMID:8465200</ref> <ref>PMID:7876261</ref> <ref>PMID:7876262</ref> <ref>PMID:12086674</ref> <ref>PMID:19700770</ref> |
| | <div style="background-color:#fffaf0;"> | | <div style="background-color:#fffaf0;"> |
| | == Publication Abstract from PubMed == | | == Publication Abstract from PubMed == |
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| | ==See Also== | | ==See Also== |
| - | *[[Transcription-repair coupling factor|Transcription-repair coupling factor]] | + | *[[Transcription-repair coupling factor 3D structures|Transcription-repair coupling factor 3D structures]] |
| | *[[UvrABC|UvrABC]] | | *[[UvrABC|UvrABC]] |
| | == References == | | == References == |
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| | __TOC__ | | __TOC__ |
| | </StructureSection> | | </StructureSection> |
| - | [[Category: Adenosinetriphosphatase]] | + | [[Category: Escherichia coli K-12]] |
| - | [[Category: Ecoli]] | + | [[Category: Large Structures]] |
| - | [[Category: Deaconescu, A M]] | + | [[Category: Deaconescu AM]] |
| - | [[Category: Grigorieff, N]] | + | [[Category: Grigorieff N]] |
| - | [[Category: Alpha/beta domain]]
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| - | [[Category: Atp binding]]
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| - | [[Category: Dna binding]]
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| - | [[Category: Dna repair]]
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| - | [[Category: Hydrolase-dna binding protein complex]]
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| - | [[Category: Nucleotide excision repair]]
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| Structural highlights
Function
[MFD_ECOLI] Couples transcription and DNA repair by recognizing RNA polymerase (RNAP) stalled at DNA lesions. Mediates ATP-dependent release of RNAP and its truncated transcript from the DNA, and recruitment of nucleotide excision repair machinery to the damaged site. Can also dissociate RNAP that is blocked by low concentration of nucleoside triphosphates or by physical obstruction, such as bound proteins. In addition, can rescue arrested complexes by promoting forward translocation. Has ATPase activity, which is required for removal of stalled RNAP, but seems to lack helicase activity. May act through a translocase activity that rewinds upstream DNA, leading either to translocation or to release of RNAP when the enzyme active site can not continue elongation.[1] [2] [3] [4] [5]
Publication Abstract from PubMed
Transcription-coupled DNA repair targets DNA lesions that block progression of elongating RNA polymerases. In bacteria, the transcription-repair coupling factor (TRCF; also known as Mfd) SF2 ATPase recognizes RNA polymerase stalled at a site of DNA damage, removes the enzyme from the DNA, and recruits the Uvr(A)BC nucleotide excision repair machinery via UvrA binding. Previous studies of TRCF revealed a molecular architecture incompatible with UvrA binding, leaving its recruitment mechanism unclear. Here, we examine the UvrA recognition determinants of TRCF using X-ray crystallography of a core TRCF-UvrA complex and probe the conformational flexibility of TRCF in the absence and presence of nucleotides using small-angle X-ray scattering. We demonstrate that the C-terminal domain of TRCF is inhibitory for UvrA binding, but not RNA polymerase release, and show that nucleotide binding induces concerted multidomain motions. Our studies suggest that autoinhibition of UvrA binding in TRCF may be relieved only upon engaging the DNA damage.
Nucleotide excision repair (NER) machinery recruitment by the transcription-repair coupling factor involves unmasking of a conserved intramolecular interface.,Deaconescu AM, Sevostyanova A, Artsimovitch I, Grigorieff N Proc Natl Acad Sci U S A. 2012 Feb 28;109(9):3353-8. Epub 2012 Feb 13. PMID:22331906[6]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
See Also
References
- ↑ Selby CP, Sancar A. Molecular mechanism of transcription-repair coupling. Science. 1993 Apr 2;260(5104):53-8. PMID:8465200
- ↑ Selby CP, Sancar A. Structure and function of transcription-repair coupling factor. I. Structural domains and binding properties. J Biol Chem. 1995 Mar 3;270(9):4882-9. PMID:7876261
- ↑ Selby CP, Sancar A. Structure and function of transcription-repair coupling factor. II. Catalytic properties. J Biol Chem. 1995 Mar 3;270(9):4890-5. PMID:7876262
- ↑ Park JS, Marr MT, Roberts JW. E. coli Transcription repair coupling factor (Mfd protein) rescues arrested complexes by promoting forward translocation. Cell. 2002 Jun 14;109(6):757-67. PMID:12086674
- ↑ Murphy MN, Gong P, Ralto K, Manelyte L, Savery NJ, Theis K. An N-terminal clamp restrains the motor domains of the bacterial transcription-repair coupling factor Mfd. Nucleic Acids Res. 2009 Oct;37(18):6042-53. Epub 2009 Aug 21. PMID:19700770 doi:10.1093/nar/gkp680
- ↑ Deaconescu AM, Sevostyanova A, Artsimovitch I, Grigorieff N. Nucleotide excision repair (NER) machinery recruitment by the transcription-repair coupling factor involves unmasking of a conserved intramolecular interface. Proc Natl Acad Sci U S A. 2012 Feb 28;109(9):3353-8. Epub 2012 Feb 13. PMID:22331906 doi:10.1073/pnas.1115105109
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