1ztn: Difference between revisions
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[[Image:1ztn.gif|left|200px]] | [[Image:1ztn.gif|left|200px]] | ||
'''INACTIVATION GATE OF POTASSIUM CHANNEL RAW3, NMR, 8 STRUCTURES''' | {{Structure | ||
|PDB= 1ztn |SIZE=350|CAPTION= <scene name='initialview01'>1ztn</scene> | |||
|SITE= | |||
|LIGAND= | |||
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'''INACTIVATION GATE OF POTASSIUM CHANNEL RAW3, NMR, 8 STRUCTURES''' | |||
==Overview== | ==Overview== | ||
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==About this Structure== | ==About this Structure== | ||
1ZTN is a [ | 1ZTN is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1ZTN OCA]. | ||
==Reference== | ==Reference== | ||
NMR structure of inactivation gates from mammalian voltage-dependent potassium channels., Antz C, Geyer M, Fakler B, Schott MK, Guy HR, Frank R, Ruppersberg JP, Kalbitzer HR, Nature. 1997 Jan 16;385(6613):272-5. PMID:[http:// | NMR structure of inactivation gates from mammalian voltage-dependent potassium channels., Antz C, Geyer M, Fakler B, Schott MK, Guy HR, Frank R, Ruppersberg JP, Kalbitzer HR, Nature. 1997 Jan 16;385(6613):272-5. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/9000078 9000078] | ||
[[Category: Homo sapiens]] | [[Category: Homo sapiens]] | ||
[[Category: Single protein]] | [[Category: Single protein]] | ||
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[[Category: potassium channel]] | [[Category: potassium channel]] | ||
''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 15:39:42 2008'' | ||
Revision as of 13:39, 20 March 2008
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INACTIVATION GATE OF POTASSIUM CHANNEL RAW3, NMR, 8 STRUCTURES
Overview
The electrical signalling properties of neurons originate largely from the gating properties of their ion channels. N-type inactivation of voltage-gated potassium (Kv) channels is the best-understood gating transition in ion channels, and occurs by a 'ball-and-chain' type mechanism. In this mechanism an N-terminal domain (inactivation gate), which is tethered to the cytoplasmic side of the channel protein by a protease-cleavable chain, binds to its receptor at the inner vestibule of the channel, thereby physically blocking the pore. Even when synthesized as a peptide, ball domains restore inactivation in Kv channels whose inactivation domains have been deleted. Using high-resolution nuclear magnetic resonance (NMR) spectroscopy, we analysed the three-dimensional structure of the ball peptides from two rapidly inactivating mammalian K. channels (Raw3 (Kv3.4) and RCK4 (Kv1.4)). The inactivation peptide of Raw3 (Raw3-IP) has a compact structure that exposes two phosphorylation sites and allows the formation of an intramolecular disulphide bridge between two spatially close cysteine residues. Raw3-IP exhibits a characteristic surface charge pattern with a positively charged, a hydrophobic, and a negatively charged region. The RCK4 inactivation peptide (RCK4-IP) shows a similar spatial distribution of charged and uncharged regions, but is more flexible and less ordered in its amino-terminal part.
About this Structure
1ZTN is a Single protein structure of sequence from Homo sapiens. Full crystallographic information is available from OCA.
Reference
NMR structure of inactivation gates from mammalian voltage-dependent potassium channels., Antz C, Geyer M, Fakler B, Schott MK, Guy HR, Frank R, Ruppersberg JP, Kalbitzer HR, Nature. 1997 Jan 16;385(6613):272-5. PMID:9000078
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