2W9R

Structural basis of N-end rule substrate recognition in Escherichia coli by the ClpAP adaptor protein ClpS

Summary for 2W9R

• Entry DOI: 10.2210/pdb2w9r/pdb
• Related: 1DPS 1F30 1F33 1JRE 1JTS 1L8H 1L8I 1LZW 1MBU 1MBV 1MBX 1MG9 1R6O 1R6Q
• Descriptor: ATP-DEPENDENT CLP PROTEASE ADAPTER PROTEIN CLPS, DNA PROTECTION DURING STARVATION PROTEIN (3 entities in total)
• Functional Keywords: chaperone, adaptor protein, dna condensation, iron, clps, clpa, cytoplasm, n-end rule, dna-binding, iron storage, metal-binding, oxidoreductase
• Biological source: ESCHERICHIA COLI; More
• Cellular location: Cytoplasm, nucleoid: P0ABT2
• Total number of polymer chains: 2
• Total formula weight: 13572.68

Authors

Schuenemann, V.,Kralik, S.M.,Albrecht, R.,Spall, S.K.,Truscott, K.N.,Dougan, D.A.,Zeth, K. (deposition date: 2009-01-28, release date: 2009-04-28, Last modification date: 2024-05-08)

Primary citation

Schuenemann, V.J.,Kralik, S.M.,Albrecht, R.,Spall, S.K.,Truscott, K.N.,Dougan, D.A.,Zeth, K.
Structural Basis of N-End Rule Substrate Recognition in Escherichia Coli by the Clpap Adaptor Protein Clps.
Embo Rep., 10:508-, 2009

PubMed Abstract: In Escherichia coli, the ClpAP protease, together with the adaptor protein ClpS, is responsible for the degradation of proteins bearing an amino-terminal destabilizing amino acid (N-degron). Here, we determined the three-dimensional structures of ClpS in complex with three peptides, each having a different destabilizing residue--Leu, Phe or Trp--at its N terminus. All peptides, regardless of the identity of their N-terminal residue, are bound in a surface pocket on ClpS in a stereo-specific manner. Several highly conserved residues in this binding pocket interact directly with the backbone of the N-degron peptide and hence are crucial for the binding of all N-degrons. By contrast, two hydrophobic residues define the volume of the binding pocket and influence the specificity of ClpS. Taken together, our data suggest that ClpS has been optimized for the binding and delivery of N-degrons containing an N-terminal Phe or Leu.

PubMed: 19373253
DOI: 10.1038/EMBOR.2009.62

Experimental method

X-RAY DIFFRACTION (1.7 Å)