2qlv: Difference between revisions

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==Overview==

AMP-activated protein kinase (AMPK) is a central regulator of energy, homeostasis in mammals and is an attractive target for drug discovery, against diabetes, obesity and other diseases. The AMPK homologue in, Saccharomyces cerevisiae, known as SNF1, is essential for responses to, glucose starvation as well as for other cellular processes, although SNF1, seems to be activated by a ligand other than AMP. Here we report the, crystal structure at 2.6 A resolution of the heterotrimer core of SNF1., The ligand-binding site in the gamma-subunit (Snf4) has clear structural, differences from that of the Schizosaccharomyces pombe enzyme, although, our crystallographic data indicate that AMP can also bind to Snf4. The, glycogen-binding domain in the beta-subunit (Sip2) interacts with Snf4 in, the heterotrimer but should still be able to bind carbohydrates. Our, structure is supported by a large body of biochemical and genetic data on, this complex. Most significantly, the structure reveals that part of the, regulatory sequence in the alpha-subunit (Snf1) is sequestered by Snf4, demonstrating a direct interaction between the alpha- and gamma-subunits, and indicating that our structure may represent the heterotrimer core of, SNF1 in its activated state.

AMP-activated protein kinase (AMPK) is a central regulator of energy homeostasis in mammals and is an attractive target for drug discovery against diabetes, obesity and other diseases. The AMPK homologue in Saccharomyces cerevisiae, known as SNF1, is essential for responses to glucose starvation as well as for other cellular processes, although SNF1 seems to be activated by a ligand other than AMP. Here we report the crystal structure at 2.6 A resolution of the heterotrimer core of SNF1. The ligand-binding site in the gamma-subunit (Snf4) has clear structural differences from that of the Schizosaccharomyces pombe enzyme, although our crystallographic data indicate that AMP can also bind to Snf4. The glycogen-binding domain in the beta-subunit (Sip2) interacts with Snf4 in the heterotrimer but should still be able to bind carbohydrates. Our structure is supported by a large body of biochemical and genetic data on this complex. Most significantly, the structure reveals that part of the regulatory sequence in the alpha-subunit (Snf1) is sequestered by Snf4, demonstrating a direct interaction between the alpha- and gamma-subunits and indicating that our structure may represent the heterotrimer core of SNF1 in its activated state.

==About this Structure==

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==Reference==

Crystal structure of the heterotrimer core of Saccharomyces cerevisiae AMPK homologue SNF1., Amodeo GA, Rudolph MJ, Tong L, Nature. 2007 Sep 12;. PMID:[http://ispc.weizmann.ac.il//pmbin/getpm?pmid=17851534 17851534]

Crystal structure of the heterotrimer core of Saccharomyces cerevisiae AMPK homologue SNF1., Amodeo GA, Rudolph MJ, Tong L, Nature. 2007 Sep 27;449(7161):492-5. Epub 2007 Sep 12. PMID:[http://ispc.weizmann.ac.il//pmbin/getpm?pmid=17851534 17851534]

[[Category: Non-specific serine/threonine protein kinase]]

[[Category: Protein complex]]

[[Category: Saccharomyces cerevisiae]]

[[Category: Amodeo, G.A.]]

[[Category: Amodeo, G A.]]

[[Category: Rudolph, M.J.]]

[[Category: Rudolph, M J.]]

[[Category: Tong, L.]]

[[Category: atp-binding]]

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[[Category: transferase/protein binding complex]]

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@@ Line 4: / Line 4: @@
 ==Overview==
-AMP-activated protein kinase (AMPK) is a central regulator of energy, homeostasis in mammals and is an attractive target for drug discovery, against diabetes, obesity and other diseases. The AMPK homologue in, Saccharomyces cerevisiae, known as SNF1, is essential for responses to, glucose starvation as well as for other cellular processes, although SNF1, seems to be activated by a ligand other than AMP. Here we report the, crystal structure at 2.6 A resolution of the heterotrimer core of SNF1., The ligand-binding site in the gamma-subunit (Snf4) has clear structural, differences from that of the Schizosaccharomyces pombe enzyme, although, our crystallographic data indicate that AMP can also bind to Snf4. The, glycogen-binding domain in the beta-subunit (Sip2) interacts with Snf4 in, the heterotrimer but should still be able to bind carbohydrates. Our, structure is supported by a large body of biochemical and genetic data on, this complex. Most significantly, the structure reveals that part of the, regulatory sequence in the alpha-subunit (Snf1) is sequestered by Snf4, demonstrating a direct interaction between the alpha- and gamma-subunits, and indicating that our structure may represent the heterotrimer core of, SNF1 in its activated state.
+AMP-activated protein kinase (AMPK) is a central regulator of energy homeostasis in mammals and is an attractive target for drug discovery against diabetes, obesity and other diseases. The AMPK homologue in Saccharomyces cerevisiae, known as SNF1, is essential for responses to glucose starvation as well as for other cellular processes, although SNF1 seems to be activated by a ligand other than AMP. Here we report the crystal structure at 2.6 A resolution of the heterotrimer core of SNF1. The ligand-binding site in the gamma-subunit (Snf4) has clear structural differences from that of the Schizosaccharomyces pombe enzyme, although our crystallographic data indicate that AMP can also bind to Snf4. The glycogen-binding domain in the beta-subunit (Sip2) interacts with Snf4 in the heterotrimer but should still be able to bind carbohydrates. Our structure is supported by a large body of biochemical and genetic data on this complex. Most significantly, the structure reveals that part of the regulatory sequence in the alpha-subunit (Snf1) is sequestered by Snf4, demonstrating a direct interaction between the alpha- and gamma-subunits and indicating that our structure may represent the heterotrimer core of SNF1 in its activated state.
 ==About this Structure==
@@ Line 10: / Line 10: @@
 ==Reference==
-Crystal structure of the heterotrimer core of Saccharomyces cerevisiae AMPK homologue SNF1., Amodeo GA, Rudolph MJ, Tong L, Nature. 2007 Sep 12;. PMID:[http://ispc.weizmann.ac.il//pmbin/getpm?pmid=17851534 17851534]
+Crystal structure of the heterotrimer core of Saccharomyces cerevisiae AMPK homologue SNF1., Amodeo GA, Rudolph MJ, Tong L, Nature. 2007 Sep 27;449(7161):492-5. Epub 2007 Sep 12. PMID:[http://ispc.weizmann.ac.il//pmbin/getpm?pmid=17851534 17851534]
 [[Category: Non-specific serine/threonine protein kinase]]
 [[Category: Protein complex]]
 [[Category: Saccharomyces cerevisiae]]
-[[Category: Amodeo, G.A.]]
+[[Category: Amodeo, G A.]]
-[[Category: Rudolph, M.J.]]
+[[Category: Rudolph, M J.]]
 [[Category: Tong, L.]]
 [[Category: atp-binding]]
@@ Line 34: / Line 34: @@
 [[Category: transferase/protein binding complex]]
-''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Wed Jan 23 12:58:34 2008''
+''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Feb 21 18:40:24 2008''