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[[Image:1nn7.gif|left|200px]]
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{{STRUCTURE_1nn7|  PDB=1nn7  |  SCENE=  }}
'''Crystal Structure Of The Tetramerization Domain Of The Shal Voltage-Gated Potassium Channel'''


==Crystal Structure Of The Tetramerization Domain Of The Shal Voltage-Gated Potassium Channel==
<StructureSection load='1nn7' size='340' side='right'caption='[[1nn7]], [[Resolution|resolution]] 2.10&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[1nn7]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Rattus_norvegicus Rattus norvegicus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1NN7 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1NN7 FirstGlance]. <br>
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.1&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=ZN:ZINC+ION'>ZN</scene></td></tr>
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=1nn7 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1nn7 OCA], [https://pdbe.org/1nn7 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1nn7 RCSB], [https://www.ebi.ac.uk/pdbsum/1nn7 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1nn7 ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/KCND2_RAT KCND2_RAT] Pore-forming (alpha) subunit of voltage-gated rapidly inactivating A-type potassium channels. May contribute to I(To) current in heart and I(Sa) current in neurons. Channel properties are modulated by interactions with other alpha subunits and with regulatory subunits.<ref>PMID:1840649</ref>
== Evolutionary Conservation ==
[[Image:Consurf_key_small.gif|200px|right]]
Check<jmol>
  <jmolCheckbox>
    <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/nn/1nn7_consurf.spt"</scriptWhenChecked>
    <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
    <text>to colour the structure by Evolutionary Conservation</text>
  </jmolCheckbox>
</jmol>, as determined by [http://consurfdb.tau.ac.il/ ConSurfDB]. You may read the [[Conservation%2C_Evolutionary|explanation]] of the method and the full data available from [http://bental.tau.ac.il/new_ConSurfDB/main_output.php?pdb_ID=1nn7 ConSurf].
<div style="clear:both"></div>
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
We have developed a semiempirical algorithm called Family Values (FamVal), which identifies residues that encode functional specificity in a protein sequence. Given a multiple sequence alignment (MSA) grouped into functionally distinct subfamilies, FamVal calculates a specificity score for each subfamily at every amino acid position of an MSA. This algorithm was used to predict specificity-encoding positions within the tetramerization assembly (T1) domain of voltage-gated potassium (Kv) channel subfamilies Kv3 and Kv4. The importance of one such position (Arg to Ala at MSA position 93) was confirmed by in vitro pull-down assays. The structural basis of this assembly discrimination was elucidated by determining the crystal structure of the Kv4 T1 domain and comparing it to the Kv3 T1 domain.


==Overview==
Determining the basis of channel-tetramerization specificity by x-ray crystallography and a sequence-comparison algorithm: Family Values (FamVal).,Nanao MH, Zhou W, Pfaffinger PJ, Choe S Proc Natl Acad Sci U S A. 2003 Jul 22;100(15):8670-5. Epub 2003 Jun 30. PMID:12835418<ref>PMID:12835418</ref>
We have developed a semiempirical algorithm called Family Values (FamVal), which identifies residues that encode functional specificity in a protein sequence. Given a multiple sequence alignment (MSA) grouped into functionally distinct subfamilies, FamVal calculates a specificity score for each subfamily at every amino acid position of an MSA. This algorithm was used to predict specificity-encoding positions within the tetramerization assembly (T1) domain of voltage-gated potassium (Kv) channel subfamilies Kv3 and Kv4. The importance of one such position (Arg to Ala at MSA position 93) was confirmed by in vitro pull-down assays. The structural basis of this assembly discrimination was elucidated by determining the crystal structure of the Kv4 T1 domain and comparing it to the Kv3 T1 domain.


==About this Structure==
From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
1NN7 is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Rattus_norvegicus Rattus norvegicus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1NN7 OCA].
</div>
<div class="pdbe-citations 1nn7" style="background-color:#fffaf0;"></div>


==Reference==
==See Also==
Determining the basis of channel-tetramerization specificity by x-ray crystallography and a sequence-comparison algorithm: Family Values (FamVal)., Nanao MH, Zhou W, Pfaffinger PJ, Choe S, Proc Natl Acad Sci U S A. 2003 Jul 22;100(15):8670-5. Epub 2003 Jun 30. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/12835418 12835418]
*[[Potassium channel 3D structures|Potassium channel 3D structures]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Large Structures]]
[[Category: Rattus norvegicus]]
[[Category: Rattus norvegicus]]
[[Category: Single protein]]
[[Category: Choe S]]
[[Category: Choe, S.]]
[[Category: Zhou W]]
[[Category: Zhou, W.]]
[[Category: Kv4 2]]
[[Category: Shal]]
[[Category: T1]]
[[Category: Teteramerization domain]]
[[Category: Voltage gated potassium channel]]
''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sat May  3 02:44:21 2008''
Retrieved from "https://proteopedia.org/1nn7"