2cj8

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[[Image:2cj8.gif|left|200px]]
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{{STRUCTURE_2cj8| PDB=2cj8 | SCENE= }}
{{STRUCTURE_2cj8| PDB=2cj8 | SCENE= }}
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'''CRYSTAL STRUCTURE OF A CELL WALL INVERTASE INHIBITOR FROM TOBACCO (PH 9.5)'''
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===CRYSTAL STRUCTURE OF A CELL WALL INVERTASE INHIBITOR FROM TOBACCO (PH 9.5)===
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==Overview==
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Plant acid invertases catalyse the breakdown of sucrose. Their activity is tightly regulated through interaction with specific protein inhibitors. The complex between the cell-wall invertase inhibitor Nt-CIF and its target enzyme is stable only at acidic pH, as found in the plant cell wall. Since the pH in this compartment can be modulated between pH 4 and 6 in planta, the rapid dissociation of the inhibitor-enzyme complex at neutral pH may represent a regulatory event. Here, it is analyzed whether the inhibitory component undergoes structural rearrangements upon changes in the pH environment. Six crystal forms grown at pH 4.6-9.5 and diffracting up to 1.63 Angstrom indicate only small structural changes in CIF. This suggests that complex dissociation at neutral pH is mediated either by rearrangements in the enzyme or by a complex pattern of surface charges in the inhibitor-enzyme binding interface.
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(as it appears on PubMed at http://www.pubmed.gov), where 16699194 is the PubMed ID number.
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{{ABSTRACT_PUBMED_16699194}}
==About this Structure==
==About this Structure==
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[[Category: Inhibitor]]
[[Category: Inhibitor]]
[[Category: Protein binding]]
[[Category: Protein binding]]
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Revision as of 14:22, 28 July 2008

Image:2cj8.png

Template:STRUCTURE 2cj8

CRYSTAL STRUCTURE OF A CELL WALL INVERTASE INHIBITOR FROM TOBACCO (PH 9.5)

Template:ABSTRACT PUBMED 16699194

About this Structure

2CJ8 is a Single protein structure of sequence from Nicotiana tabacum. Full crystallographic information is available from OCA.

Reference

Multiple crystal forms of the cell-wall invertase inhibitor from tobacco support high conformational rigidity over a broad pH range., Hothorn M, Scheffzek K, Acta Crystallogr D Biol Crystallogr. 2006 Jun;62(Pt 6):665-70. Epub 2006, May 12. PMID:16699194

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