1aii: Difference between revisions

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==Overview==

Annexin III, a putative inositol (1,2)-phosphohydrolase, was, co-crystallized with inositol 2-phosphate, the inhibitor of the reaction, and its structure was solved to 1.95 A resolution. No enzyme active site, was observed in the structure. Assays for enzymatic activity were also, negative. Search for annexin III-inositol phosphate interactions using the, BIAcoreTM system revealed an affinity for inositol cyclic (1,2)-phosphate, suggesting annexin III may sequester the molecule in the cell. The, BIAcoreTM system used with different phospholipids showed that annexin III, displays specificity for phosphatidylethanolamine, but not for, phosphatidylinositols. Interestingly, a molecule of ethanolamine was found, bound to the protein in the crystal structure. Coupled with the fact that, this is a particularly abundant phospholipid in granules specific to, neutrophils, cells where annexin III is highly expressed, our finding, could be pointing to a physiological role of annexin III.

Annexin III, a putative inositol (1,2)-phosphohydrolase, was co-crystallized with inositol 2-phosphate, the inhibitor of the reaction, and its structure was solved to 1.95 A resolution. No enzyme active site was observed in the structure. Assays for enzymatic activity were also negative. Search for annexin III-inositol phosphate interactions using the BIAcoreTM system revealed an affinity for inositol cyclic (1,2)-phosphate, suggesting annexin III may sequester the molecule in the cell. The BIAcoreTM system used with different phospholipids showed that annexin III displays specificity for phosphatidylethanolamine, but not for phosphatidylinositols. Interestingly, a molecule of ethanolamine was found bound to the protein in the crystal structure. Coupled with the fact that this is a particularly abundant phospholipid in granules specific to neutrophils, cells where annexin III is highly expressed, our finding could be pointing to a physiological role of annexin III.

==About this Structure==

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[[Category: phospholipase a2 inhibitor]]

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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Feb 21 11:44:51 2008''

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@@ Line 4: / Line 4: @@
 ==Overview==
-Annexin III, a putative inositol (1,2)-phosphohydrolase, was, co-crystallized with inositol 2-phosphate, the inhibitor of the reaction, and its structure was solved to 1.95 A resolution. No enzyme active site, was observed in the structure. Assays for enzymatic activity were also, negative. Search for annexin III-inositol phosphate interactions using the, BIAcoreTM system revealed an affinity for inositol cyclic (1,2)-phosphate, suggesting annexin III may sequester the molecule in the cell. The, BIAcoreTM system used with different phospholipids showed that annexin III, displays specificity for phosphatidylethanolamine, but not for, phosphatidylinositols. Interestingly, a molecule of ethanolamine was found, bound to the protein in the crystal structure. Coupled with the fact that, this is a particularly abundant phospholipid in granules specific to, neutrophils, cells where annexin III is highly expressed, our finding, could be pointing to a physiological role of annexin III.
+Annexin III, a putative inositol (1,2)-phosphohydrolase, was co-crystallized with inositol 2-phosphate, the inhibitor of the reaction, and its structure was solved to 1.95 A resolution. No enzyme active site was observed in the structure. Assays for enzymatic activity were also negative. Search for annexin III-inositol phosphate interactions using the BIAcoreTM system revealed an affinity for inositol cyclic (1,2)-phosphate, suggesting annexin III may sequester the molecule in the cell. The BIAcoreTM system used with different phospholipids showed that annexin III displays specificity for phosphatidylethanolamine, but not for phosphatidylinositols. Interestingly, a molecule of ethanolamine was found bound to the protein in the crystal structure. Coupled with the fact that this is a particularly abundant phospholipid in granules specific to neutrophils, cells where annexin III is highly expressed, our finding could be pointing to a physiological role of annexin III.
 ==About this Structure==
@@ Line 22: / Line 22: @@
 [[Category: phospholipase a2 inhibitor]]
-''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sun Feb  3 09:30:30 2008''
+''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Feb 21 11:44:51 2008''