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| | ==J-DOMAIN (RESIDUES 1-77) OF THE ESCHERICHIA COLI N-TERMINAL FRAGMENT (RESIDUES 1-104) OF THE MOLECULAR CHAPERONE DNAJ, NMR, 20 STRUCTURES== | | ==J-DOMAIN (RESIDUES 1-77) OF THE ESCHERICHIA COLI N-TERMINAL FRAGMENT (RESIDUES 1-104) OF THE MOLECULAR CHAPERONE DNAJ, NMR, 20 STRUCTURES== |
| - | <StructureSection load='1bq0' size='340' side='right'caption='[[1bq0]], [[NMR_Ensembles_of_Models | 20 NMR models]]' scene=''> | + | <StructureSection load='1bq0' size='340' side='right'caption='[[1bq0]]' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[1bq0]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/"bacillus_coli"_migula_1895 "bacillus coli" migula 1895]. Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1BQ0 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1BQ0 FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[1bq0]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Escherichia_coli Escherichia coli]. Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1BQ0 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1BQ0 FirstGlance]. <br> |
| - | </td></tr><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=1bq0 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1bq0 OCA], [http://pdbe.org/1bq0 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1bq0 RCSB], [http://www.ebi.ac.uk/pdbsum/1bq0 PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=1bq0 ProSAT]</span></td></tr> | + | </td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">Solution NMR</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=1bq0 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1bq0 OCA], [https://pdbe.org/1bq0 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1bq0 RCSB], [https://www.ebi.ac.uk/pdbsum/1bq0 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1bq0 ProSAT]</span></td></tr> |
| | </table> | | </table> |
| | == Function == | | == Function == |
| - | [[http://www.uniprot.org/uniprot/DNAJ_ECOLI DNAJ_ECOLI]] Interacts with DnaK and GrpE to disassemble a protein complex at the origins of replication of phage lambda and several plasmids. Participates actively in the response to hyperosmotic and heat shock by preventing the aggregation of stress-denatured proteins and by disaggregating proteins, also in an autonomous, DnaK-independent fashion. Unfolded proteins bind initially to DnaJ; upon interaction with the DnaJ-bound protein, DnaK hydrolyzes its bound ATP, resulting in the formation of a stable complex. GrpE releases ADP from DnaK; ATP binding to DnaK triggers the release of the substrate protein, thus completing the reaction cycle. Several rounds of ATP-dependent interactions between DnaJ, DnaK and GrpE are required for fully efficient folding.<ref>PMID:1826368</ref> <ref>PMID:15302880</ref> <ref>PMID:15044009</ref> <ref>PMID:15485812</ref> | + | [https://www.uniprot.org/uniprot/DNAJ_ECOLI DNAJ_ECOLI] Interacts with DnaK and GrpE to disassemble a protein complex at the origins of replication of phage lambda and several plasmids. Participates actively in the response to hyperosmotic and heat shock by preventing the aggregation of stress-denatured proteins and by disaggregating proteins, also in an autonomous, DnaK-independent fashion. Unfolded proteins bind initially to DnaJ; upon interaction with the DnaJ-bound protein, DnaK hydrolyzes its bound ATP, resulting in the formation of a stable complex. GrpE releases ADP from DnaK; ATP binding to DnaK triggers the release of the substrate protein, thus completing the reaction cycle. Several rounds of ATP-dependent interactions between DnaJ, DnaK and GrpE are required for fully efficient folding.<ref>PMID:1826368</ref> <ref>PMID:15302880</ref> <ref>PMID:15044009</ref> <ref>PMID:15485812</ref> |
| | == Evolutionary Conservation == | | == Evolutionary Conservation == |
| | [[Image:Consurf_key_small.gif|200px|right]] | | [[Image:Consurf_key_small.gif|200px|right]] |
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| | __TOC__ | | __TOC__ |
| | </StructureSection> | | </StructureSection> |
| - | [[Category: Bacillus coli migula 1895]] | + | [[Category: Escherichia coli]] |
| | [[Category: Large Structures]] | | [[Category: Large Structures]] |
| - | [[Category: Flanagan, J M]] | + | [[Category: Flanagan JM]] |
| - | [[Category: Huang, K]] | + | [[Category: Huang K]] |
| - | [[Category: Prestegard, J H]] | + | [[Category: Prestegard JH]] |
| - | [[Category: Chaperone]]
| + | |
| - | [[Category: Dnak]]
| + | |
| - | [[Category: Heat shock]]
| + | |
| - | [[Category: Protein folding]]
| + | |
| Structural highlights
Function
DNAJ_ECOLI Interacts with DnaK and GrpE to disassemble a protein complex at the origins of replication of phage lambda and several plasmids. Participates actively in the response to hyperosmotic and heat shock by preventing the aggregation of stress-denatured proteins and by disaggregating proteins, also in an autonomous, DnaK-independent fashion. Unfolded proteins bind initially to DnaJ; upon interaction with the DnaJ-bound protein, DnaK hydrolyzes its bound ATP, resulting in the formation of a stable complex. GrpE releases ADP from DnaK; ATP binding to DnaK triggers the release of the substrate protein, thus completing the reaction cycle. Several rounds of ATP-dependent interactions between DnaJ, DnaK and GrpE are required for fully efficient folding.[1] [2] [3] [4]
Evolutionary Conservation
Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf.
Publication Abstract from PubMed
Two different recombinant constructs of the N-terminal domain in Escherichia coli DnaJ were uniformly labeled with nitrogen-15 and carbon-13. One, DnaJ(1-78), contains the complete "J-domain," and the other, DnaJ(1-104), contains both the "J-domain" and a conserved "G/F" extension at the C-terminus. The three-dimensional structures of these proteins have been determined by heteronuclear NMR experiments. In both proteins the "J-domain" adopts a compact structure consisting of a helix-turn-helix-loop-helix-turn-helix motif. In contrast, the "G/F" region in DnaJ(1-104) does not fold into a well-defined structure. Nevertheless, the "G/F" region has been found to have an effect on the packing of the helices in the "J-domain" in DnaJ(1-104). Particularly, the interhelical angles between Helix IV and other helices are significantly different in the two structures. In addition, there are some local conformational changes in the loop region connecting the two central helices. These structural differences in the "J-domain" in the presence of the "G/F" region may be related to the observation that DnaJ (1-78) is incapable of stimulating the ATPase activity of the molecular chaperone protein DnaK despite evidence that sites mediating the binding of DnaJ to DnaK are located in the 1-78 segment.
The influence of C-terminal extension on the structure of the "J-domain" in E. coli DnaJ.,Huang K, Flanagan JM, Prestegard JH Protein Sci. 1999 Jan;8(1):203-14. PMID:10210198[5]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
See Also
References
- ↑ Liberek K, Marszalek J, Ang D, Georgopoulos C, Zylicz M. Escherichia coli DnaJ and GrpE heat shock proteins jointly stimulate ATPase activity of DnaK. Proc Natl Acad Sci U S A. 1991 Apr 1;88(7):2874-8. PMID:1826368
- ↑ Zietkiewicz S, Krzewska J, Liberek K. Successive and synergistic action of the Hsp70 and Hsp100 chaperones in protein disaggregation. J Biol Chem. 2004 Oct 22;279(43):44376-83. Epub 2004 Aug 9. PMID:15302880 doi:http://dx.doi.org/10.1074/jbc.M402405200
- ↑ Siegenthaler RK, Grimshaw JP, Christen P. Immediate response of the DnaK molecular chaperone system to heat shock. FEBS Lett. 2004 Mar 26;562(1-3):105-10. PMID:15044009 doi:http://dx.doi.org/10.1016/S0014-5793(04)00190-5
- ↑ Zzaman S, Reddy JM, Bastia D. The DnaK-DnaJ-GrpE chaperone system activates inert wild type pi initiator protein of R6K into a form active in replication initiation. J Biol Chem. 2004 Dec 3;279(49):50886-94. Epub 2004 Oct 13. PMID:15485812 doi:http://dx.doi.org/M407531200
- ↑ Huang K, Flanagan JM, Prestegard JH. The influence of C-terminal extension on the structure of the "J-domain" in E. coli DnaJ. Protein Sci. 1999 Jan;8(1):203-14. PMID:10210198
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