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Structure and mechanism of the primosome protein DnaT– functional structures for homotrimerization, dissociation of ssDNA from the PriB·ssDNA complex, and formation of the DnaT·ssDNA complex
In Escherichia coli, the primosome plays an essential role in replication restart after dissociation of replisomes at the damaged replication fork. As well as PriA and PriB, DnaT, an ssDNA‐binding protein, is a key member of the primosome. In this study, limited proteolysis indicated that E. coli Dn...
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Published in: | The FEBS journal 2014-12, Vol.281 (23), p.5356-5370 |
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description | In Escherichia coli, the primosome plays an essential role in replication restart after dissociation of replisomes at the damaged replication fork. As well as PriA and PriB, DnaT, an ssDNA‐binding protein, is a key member of the primosome. In this study, limited proteolysis indicated that E. coli DnaT was composed of two domains, consistent with the results of recent studies using Klebsiella pneumonia DnaT. We also found that a specific 24‐residue region (Phe42–Asp66) in the N‐terminal domain (1–88) was crucial for DnaT trimerization. Moreover, we determined the structure of the DnaT C‐terminal domain (89–179) by NMR spectroscopy. This domain included three α‐helices and a long flexible C‐terminal tail, similar to the C‐terminal subdomain of the AAA+ ATPase family. The neighboring histidines, His136 and His137, at a position corresponding to the AAA+ sensor II motif, were suggested to form an ssDNA‐binding site. Furthermore, we found that the acidic linker between the two domains had an activity for dissociating ssDNA from the PriB·ssDNA complexes in a manner supported by the conserved acidic residues Asp70 and Glu76. Thus, these findings provide a novel structural basis for understanding the mechanism of DnaT in exposure of ssDNA and reloading of the replicative helicase at the stalled replication fork. DATABASE: The coordinates used for the ensemble of NMR structures have been deposited in the Protein Data Bank under accession code 2ru8. The NMR data have been deposited in the BioMagResBank (www.bmrb.wisc.edu) under accession number 11549. STRUCTURED DIGITAL ABSTRACT: DnaT and DnaT bind by nuclear magnetic resonance (View interaction) DnaT and PriB bind by isothermal titration calorimetry (View interaction) DnaT and DnaT bind by molecular sieving (View interaction) |
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As well as PriA and PriB, DnaT, an ssDNA‐binding protein, is a key member of the primosome. In this study, limited proteolysis indicated that E. coli DnaT was composed of two domains, consistent with the results of recent studies using Klebsiella pneumonia DnaT. We also found that a specific 24‐residue region (Phe42–Asp66) in the N‐terminal domain (1–88) was crucial for DnaT trimerization. Moreover, we determined the structure of the DnaT C‐terminal domain (89–179) by NMR spectroscopy. This domain included three α‐helices and a long flexible C‐terminal tail, similar to the C‐terminal subdomain of the AAA+ ATPase family. The neighboring histidines, His136 and His137, at a position corresponding to the AAA+ sensor II motif, were suggested to form an ssDNA‐binding site. Furthermore, we found that the acidic linker between the two domains had an activity for dissociating ssDNA from the PriB·ssDNA complexes in a manner supported by the conserved acidic residues Asp70 and Glu76. Thus, these findings provide a novel structural basis for understanding the mechanism of DnaT in exposure of ssDNA and reloading of the replicative helicase at the stalled replication fork. DATABASE: The coordinates used for the ensemble of NMR structures have been deposited in the Protein Data Bank under accession code 2ru8. The NMR data have been deposited in the BioMagResBank (www.bmrb.wisc.edu) under accession number 11549. STRUCTURED DIGITAL ABSTRACT: DnaT and DnaT bind by nuclear magnetic resonance (View interaction) DnaT and PriB bind by isothermal titration calorimetry (View interaction) DnaT and DnaT bind by molecular sieving (View interaction)</description><identifier>ISSN: 1742-464X</identifier><identifier>EISSN: 1742-4658</identifier><identifier>DOI: 10.1111/febs.13080</identifier><identifier>PMID: 25265331</identifier><language>eng</language><publisher>England: Published by Blackwell Pub. on behalf of the Federation of European Biochemical Societies</publisher><subject>adenosinetriphosphatase ; Amino Acid Sequence ; Binding Sites ; calorimetry ; Deoxyribonucleic acid ; dissociation ; DNA ; DNA, Single-Stranded - chemistry ; DNA-Binding Proteins - chemistry ; DnaT ; E coli ; Escherichia coli ; Escherichia coli - chemistry ; Escherichia coli Proteins - chemistry ; histidine ; Klebsiella pneumoniae ; Magnetic Resonance Spectroscopy ; Molecular biology ; Molecular Sequence Data ; NMR spectroscopy ; nuclear magnetic resonance spectroscopy ; PriB ; primosome ; Protein Multimerization ; protein structure ; Protein Structure, Secondary ; Protein Structure, Tertiary ; Proteins ; proteolysis ; replication restart ; single-stranded DNA ; titration</subject><ispartof>The FEBS journal, 2014-12, Vol.281 (23), p.5356-5370</ispartof><rights>2014 FEBS</rights><rights>2014 FEBS.</rights><rights>Copyright © 2014 Federation of European Biochemical Societies</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,780,784,27924,27925</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/25265331$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Fujiyama, Saki</creatorcontrib><creatorcontrib>Abe, Yoshito</creatorcontrib><creatorcontrib>Tani, Junya</creatorcontrib><creatorcontrib>Urabe, Masashi</creatorcontrib><creatorcontrib>Sato, Kenji</creatorcontrib><creatorcontrib>Aramaki, Takahiko</creatorcontrib><creatorcontrib>Katayama, Tsutomu</creatorcontrib><creatorcontrib>Ueda, Tadashi</creatorcontrib><title>Structure and mechanism of the primosome protein DnaT– functional structures for homotrimerization, dissociation of ssDNA from the PriB·ssDNA complex, and formation of the DnaT·ssDNA complex</title><title>The FEBS journal</title><addtitle>FEBS J</addtitle><description>In Escherichia coli, the primosome plays an essential role in replication restart after dissociation of replisomes at the damaged replication fork. As well as PriA and PriB, DnaT, an ssDNA‐binding protein, is a key member of the primosome. In this study, limited proteolysis indicated that E. coli DnaT was composed of two domains, consistent with the results of recent studies using Klebsiella pneumonia DnaT. We also found that a specific 24‐residue region (Phe42–Asp66) in the N‐terminal domain (1–88) was crucial for DnaT trimerization. Moreover, we determined the structure of the DnaT C‐terminal domain (89–179) by NMR spectroscopy. This domain included three α‐helices and a long flexible C‐terminal tail, similar to the C‐terminal subdomain of the AAA+ ATPase family. The neighboring histidines, His136 and His137, at a position corresponding to the AAA+ sensor II motif, were suggested to form an ssDNA‐binding site. Furthermore, we found that the acidic linker between the two domains had an activity for dissociating ssDNA from the PriB·ssDNA complexes in a manner supported by the conserved acidic residues Asp70 and Glu76. Thus, these findings provide a novel structural basis for understanding the mechanism of DnaT in exposure of ssDNA and reloading of the replicative helicase at the stalled replication fork. DATABASE: The coordinates used for the ensemble of NMR structures have been deposited in the Protein Data Bank under accession code 2ru8. The NMR data have been deposited in the BioMagResBank (www.bmrb.wisc.edu) under accession number 11549. STRUCTURED DIGITAL ABSTRACT: DnaT and DnaT bind by nuclear magnetic resonance (View interaction) DnaT and PriB bind by isothermal titration calorimetry (View interaction) DnaT and DnaT bind by molecular sieving (View interaction)</description><subject>adenosinetriphosphatase</subject><subject>Amino Acid Sequence</subject><subject>Binding Sites</subject><subject>calorimetry</subject><subject>Deoxyribonucleic acid</subject><subject>dissociation</subject><subject>DNA</subject><subject>DNA, Single-Stranded - chemistry</subject><subject>DNA-Binding Proteins - chemistry</subject><subject>DnaT</subject><subject>E coli</subject><subject>Escherichia coli</subject><subject>Escherichia coli - chemistry</subject><subject>Escherichia coli Proteins - chemistry</subject><subject>histidine</subject><subject>Klebsiella pneumoniae</subject><subject>Magnetic Resonance Spectroscopy</subject><subject>Molecular biology</subject><subject>Molecular Sequence Data</subject><subject>NMR spectroscopy</subject><subject>nuclear magnetic resonance spectroscopy</subject><subject>PriB</subject><subject>primosome</subject><subject>Protein Multimerization</subject><subject>protein structure</subject><subject>Protein Structure, Secondary</subject><subject>Protein Structure, Tertiary</subject><subject>Proteins</subject><subject>proteolysis</subject><subject>replication restart</subject><subject>single-stranded DNA</subject><subject>titration</subject><issn>1742-464X</issn><issn>1742-4658</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2014</creationdate><recordtype>article</recordtype><recordid>eNpdkc1u1DAUhS0EomVgwwOAJTYsOsU_sess-wtIFSBNK7Gz7OSacRXHxU4EZcU78DDs-yg8CU6mnUW98bX9nXOtexB6Sck-LeudA5v3KSeKPEK79KBiy0oK9XhbV1930LOcrwjhoqrrp2iHCSYF53QX3a6GNDbDmACbvsUBmrXpfQ44OjysAV8nH2KOYariAL7HJ725-Pf7D3Zj3ww-9qbD-d4jYxcTXscQh6KD5H-ZCdnDrc85Nn4-TdY5n3w6xC7FMHf5kvzR7d_NZRPDdQc_9-b_FLuwFU3k1P0B-Rw9cabL8OJuX6DLs9OL4w_L88_vPx4fni8dZ4wsreSGkFYJwyqmqJIMGsJ4I6UF1qpKCGktQNs45hQoSWpqjayFrStLWVXzBXq78S2T-D5CHnTwuYGuMz3EMWsqmWJcCcUL-uYBehXHVEY1UweSibqEsUCv7qjRBmj1NGuTbvR9OgWgG-CH7-Bm-06JnnLXU-56zl2fnR6t5qpoXm80zkRtviWf9eWKESpJWaJWkv8H1v-ulQ</recordid><startdate>201412</startdate><enddate>201412</enddate><creator>Fujiyama, Saki</creator><creator>Abe, Yoshito</creator><creator>Tani, Junya</creator><creator>Urabe, Masashi</creator><creator>Sato, Kenji</creator><creator>Aramaki, Takahiko</creator><creator>Katayama, Tsutomu</creator><creator>Ueda, Tadashi</creator><general>Published by Blackwell Pub. on behalf of the Federation of European Biochemical Societies</general><general>Blackwell Publishing Ltd</general><scope>FBQ</scope><scope>CGR</scope><scope>CUY</scope><scope>CVF</scope><scope>ECM</scope><scope>EIF</scope><scope>NPM</scope><scope>7QL</scope><scope>7QP</scope><scope>7QR</scope><scope>7TK</scope><scope>7TM</scope><scope>7U9</scope><scope>8FD</scope><scope>C1K</scope><scope>FR3</scope><scope>H94</scope><scope>M7N</scope><scope>P64</scope><scope>RC3</scope><scope>7X8</scope></search><sort><creationdate>201412</creationdate><title>Structure and mechanism of the primosome protein DnaT– functional structures for homotrimerization, dissociation of ssDNA from the PriB·ssDNA complex, and formation of the DnaT·ssDNA complex</title><author>Fujiyama, Saki ; 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As well as PriA and PriB, DnaT, an ssDNA‐binding protein, is a key member of the primosome. In this study, limited proteolysis indicated that E. coli DnaT was composed of two domains, consistent with the results of recent studies using Klebsiella pneumonia DnaT. We also found that a specific 24‐residue region (Phe42–Asp66) in the N‐terminal domain (1–88) was crucial for DnaT trimerization. Moreover, we determined the structure of the DnaT C‐terminal domain (89–179) by NMR spectroscopy. This domain included three α‐helices and a long flexible C‐terminal tail, similar to the C‐terminal subdomain of the AAA+ ATPase family. The neighboring histidines, His136 and His137, at a position corresponding to the AAA+ sensor II motif, were suggested to form an ssDNA‐binding site. Furthermore, we found that the acidic linker between the two domains had an activity for dissociating ssDNA from the PriB·ssDNA complexes in a manner supported by the conserved acidic residues Asp70 and Glu76. Thus, these findings provide a novel structural basis for understanding the mechanism of DnaT in exposure of ssDNA and reloading of the replicative helicase at the stalled replication fork. DATABASE: The coordinates used for the ensemble of NMR structures have been deposited in the Protein Data Bank under accession code 2ru8. The NMR data have been deposited in the BioMagResBank (www.bmrb.wisc.edu) under accession number 11549. STRUCTURED DIGITAL ABSTRACT: DnaT and DnaT bind by nuclear magnetic resonance (View interaction) DnaT and PriB bind by isothermal titration calorimetry (View interaction) DnaT and DnaT bind by molecular sieving (View interaction)</abstract><cop>England</cop><pub>Published by Blackwell Pub. on behalf of the Federation of European Biochemical Societies</pub><pmid>25265331</pmid><doi>10.1111/febs.13080</doi><tpages>15</tpages><oa>free_for_read</oa></addata></record> |
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subjects | adenosinetriphosphatase Amino Acid Sequence Binding Sites calorimetry Deoxyribonucleic acid dissociation DNA DNA, Single-Stranded - chemistry DNA-Binding Proteins - chemistry DnaT E coli Escherichia coli Escherichia coli - chemistry Escherichia coli Proteins - chemistry histidine Klebsiella pneumoniae Magnetic Resonance Spectroscopy Molecular biology Molecular Sequence Data NMR spectroscopy nuclear magnetic resonance spectroscopy PriB primosome Protein Multimerization protein structure Protein Structure, Secondary Protein Structure, Tertiary Proteins proteolysis replication restart single-stranded DNA titration |
title | Structure and mechanism of the primosome protein DnaT– functional structures for homotrimerization, dissociation of ssDNA from the PriB·ssDNA complex, and formation of the DnaT·ssDNA complex |
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