3eff

From Proteopedia

(Difference between revisions)

Revision as of 10:22, 9 September 2020

The Crystal Structure of Full-Length KcsA in its Closed Conformation

Structural highlights

3eff is a 8 chain structure with sequence from Mus musculus and Streptomyces lividans. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

[KCSA_STRLI] Acts as a pH-gated potassium ion channel; changing the cytosolic pH from 7 to 4 opens the channel, although it is not clear if this is the physiological stimulus for channel opening. Monovalent cation preference is K(+) > Rb(+) > NH4(+) >> Na(+) > Li(+).^[1]

Evolutionary Conservation

Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf.

Publication Abstract from PubMed

KcsA is a proton-activated, voltage-modulated K(+) channel that has served as the archetype pore domain in the Kv channel superfamily. Here, we have used synthetic antigen-binding fragments (Fabs) as crystallographic chaperones to determine the structure of full-length KcsA at 3.8 A, as well as that of its isolated C-terminal domain at 2.6 A. The structure of the full-length KcsA-Fab complex reveals a well-defined, 4-helix bundle that projects approximately 70 A toward the cytoplasm. This bundle promotes a approximately 15 degrees bending in the inner bundle gate, tightening its diameter and shifting the narrowest point 2 turns of helix below. Functional analysis of the full-length KcsA-Fab complex suggests that the C-terminal bundle remains whole during gating. We suggest that this structure likely represents the physiologically relevant closed conformation of KcsA.

Crystal structure of full-length KcsA in its closed conformation.,Uysal S, Vasquez V, Tereshko V, Esaki K, Fellouse FA, Sidhu SS, Koide S, Perozo E, Kossiakoff A Proc Natl Acad Sci U S A. 2009 Apr 3. PMID:19346472^[2]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

References

↑ Schrempf H, Schmidt O, Kummerlen R, Hinnah S, Muller D, Betzler M, Steinkamp T, Wagner R. A prokaryotic potassium ion channel with two predicted transmembrane segments from Streptomyces lividans. EMBO J. 1995 Nov 1;14(21):5170-8. PMID:7489706
↑ Uysal S, Vasquez V, Tereshko V, Esaki K, Fellouse FA, Sidhu SS, Koide S, Perozo E, Kossiakoff A. Crystal structure of full-length KcsA in its closed conformation. Proc Natl Acad Sci U S A. 2009 Apr 3. PMID:19346472

1 Structural highlights
2 Function
3 Evolutionary Conservation
4 Publication Abstract from PubMed
5 See Also
6 References

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/3eff"

@@ Line 1: / Line 1: @@
 ==The Crystal Structure of Full-Length KcsA in its Closed Conformation==
-<StructureSection load='3eff' size='340' side='right' caption='[[3eff]], [[Resolution|resolution]] 3.80&Aring;' scene=''>
+<StructureSection load='3eff' size='340' side='right'caption='[[3eff]], [[Resolution|resolution]] 3.80&Aring;' scene=''>
 == Structural highlights ==
-<table><tr><td colspan='2'>[[3eff]] is a 8 chain structure with sequence from [http://en.wikipedia.org/wiki/Mus_musculus Mus musculus] and [http://en.wikipedia.org/wiki/Streptomyces_lividans Streptomyces lividans]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3EFF OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3EFF FirstGlance]. <br>
+<table><tr><td colspan='2'>[[3eff]] is a 8 chain structure with sequence from [http://en.wikipedia.org/wiki/Mus_musculus Mus musculus] and [http://en.wikipedia.org/wiki/Streptomyces_lividans Streptomyces lividans]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3EFF OCA]. For a <b>guided tour on the structure components</b> use [http://proteopedia.org/fgij/fg.htm?mol=3EFF FirstGlance]. <br>
-</td></tr><tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3eff FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3eff OCA], [http://pdbe.org/3eff PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=3eff RCSB], [http://www.ebi.ac.uk/pdbsum/3eff PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=3eff ProSAT]</span></td></tr>
+</td></tr><tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://proteopedia.org/fgij/fg.htm?mol=3eff FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3eff OCA], [http://pdbe.org/3eff PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=3eff RCSB], [http://www.ebi.ac.uk/pdbsum/3eff PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=3eff ProSAT]</span></td></tr>
 </table>
 == Function ==
@@ Line 30: / Line 30: @@
 ==See Also==
 *[[Antibody 3D structures|Antibody 3D structures]]
-*[[Potassium Channel|Potassium Channel]]
+*[[Potassium channel 3D structures|Potassium channel 3D structures]]
+*[[3D structures of non-human antibody|3D structures of non-human antibody]]
 == References ==
 <references/>
 __TOC__
 </StructureSection>
+[[Category: Large Structures]]
 [[Category: Mus musculus]]
 [[Category: Streptomyces lividans]]

3eff

From Proteopedia

Revision as of 10:22, 9 September 2020

The Crystal Structure of Full-Length KcsA in its Closed Conformation

Structural highlights

Function

Evolutionary Conservation

Publication Abstract from PubMed

See Also

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

Views

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