1ou9: Difference between revisions
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'''Structure of SspB, a AAA+ protease delivery protein''' | {{Structure | ||
|PDB= 1ou9 |SIZE=350|CAPTION= <scene name='initialview01'>1ou9</scene>, resolution 1.80Å | |||
|SITE= | |||
|LIGAND= <scene name='pdbligand=CA:CALCIUM ION'>CA</scene> | |||
|ACTIVITY= | |||
|GENE= SSPB ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=727 Haemophilus influenzae]) | |||
}} | |||
'''Structure of SspB, a AAA+ protease delivery protein''' | |||
==Overview== | ==Overview== | ||
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==About this Structure== | ==About this Structure== | ||
1OU9 is a [ | 1OU9 is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Haemophilus_influenzae Haemophilus influenzae]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1OU9 OCA]. | ||
==Reference== | ==Reference== | ||
Structure of a delivery protein for an AAA+ protease in complex with a peptide degradation tag., Levchenko I, Grant RA, Wah DA, Sauer RT, Baker TA, Mol Cell. 2003 Aug;12(2):365-72. PMID:[http:// | Structure of a delivery protein for an AAA+ protease in complex with a peptide degradation tag., Levchenko I, Grant RA, Wah DA, Sauer RT, Baker TA, Mol Cell. 2003 Aug;12(2):365-72. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/14536076 14536076] | ||
[[Category: Haemophilus influenzae]] | [[Category: Haemophilus influenzae]] | ||
[[Category: Single protein]] | [[Category: Single protein]] | ||
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[[Category: ssra peptide-binding protein]] | [[Category: ssra peptide-binding protein]] | ||
''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Mar 20 13:15:41 2008'' | ||
Revision as of 11:15, 20 March 2008
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| 1ou9, resolution 1.80Å | |||||||||||||
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| Ligands: | CA | ||||||||||||
| Gene: | SSPB (Haemophilus influenzae) | ||||||||||||
| Coordinates: | save as pdb, mmCIF, xml | ||||||||||||
Structure of SspB, a AAA+ protease delivery protein
Overview
Substrate selection by AAA+ ATPases that function to unfold proteins or alter protein conformation is often regulated by delivery or adaptor proteins. SspB is a protein dimer that binds to the ssrA degradation tag and delivers proteins bearing this tag to ClpXP, an AAA+ protease, for degradation. Here, we describe the structure of the peptide binding domain of H. influenzae SspB in complex with an ssrA peptide at 1.6 A resolution. The ssrA peptides are bound in well-defined clefts located at the extreme ends of the SspB homodimer. SspB contacts residues within the N-terminal and central regions of the 11 residue ssrA tag but leaves the C-terminal residues exposed and positioned to dock with ClpX. This structure, taken together with biochemical analysis of SspB, suggests mechanisms by which proteins like SspB escort substrates to AAA+ ATPases and enhance the specificity and affinity of target recognition.
About this Structure
1OU9 is a Single protein structure of sequence from Haemophilus influenzae. Full crystallographic information is available from OCA.
Reference
Structure of a delivery protein for an AAA+ protease in complex with a peptide degradation tag., Levchenko I, Grant RA, Wah DA, Sauer RT, Baker TA, Mol Cell. 2003 Aug;12(2):365-72. PMID:14536076
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