1dkg

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CRYSTAL STRUCTURE OF THE NUCLEOTIDE EXCHANGE FACTOR GRPE BOUND TO THE ATPASE DOMAIN OF THE MOLECULAR CHAPERONE DNAKCRYSTAL STRUCTURE OF THE NUCLEOTIDE EXCHANGE FACTOR GRPE BOUND TO THE ATPASE DOMAIN OF THE MOLECULAR CHAPERONE DNAK

Structural highlights

1dkg is a 3 chain structure with sequence from Escherichia coli. The August 2002 RCSB PDB Molecule of the Month feature on Chaperones by David S. Goodsell is 10.2210/rcsb_pdb/mom_2002_8. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Method:X-ray diffraction, Resolution 2.8Å
Resources:FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

GRPE_ECOLI Participates actively in the response to hyperosmotic and heat shock by preventing the aggregation of stress-denatured proteins, in association with DnaK and GrpE. It is the nucleotide exchange factor for DnaK and may function as a thermosensor. 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.

See Also

References

  1. 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
  2. Wu B, Wawrzynow A, Zylicz M, Georgopoulos C. Structure-function analysis of the Escherichia coli GrpE heat shock protein. EMBO J. 1996 Sep 16;15(18):4806-16. PMID:8890154
  3. Mehl AF, Heskett LD, Neal KM. A GrpE mutant containing the NH(2)-terminal "tail" region is able to displace bound polypeptide substrate from DnaK. Biochem Biophys Res Commun. 2001 Mar 30;282(2):562-9. PMID:11401497 doi:http://dx.doi.org/10.1006/bbrc.2001.4567
  4. Brehmer D, Gassler C, Rist W, Mayer MP, Bukau B. Influence of GrpE on DnaK-substrate interactions. J Biol Chem. 2004 Jul 2;279(27):27957-64. Epub 2004 Apr 21. PMID:15102842 doi:http://dx.doi.org/10.1074/jbc.M403558200

1dkg, resolution 2.80Å

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OCA