3cl1

<StructureSection load='3cl1' size='340' side='right' caption='[[3cl1]], [[Resolution|resolution]] 2.40&Aring;' scene=''>

<table><tr><td colspan='2'>[[3cl1]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/Mesorhizobium_loti Mesorhizobium loti]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3CL1 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3CL1 FirstGlance]. <br>

</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=CL:CHLORIDE+ION'>CL</scene>, <scene name='pdbligand=K:POTASSIUM+ION'>K</scene>, <scene name='pdbligand=PCG:CYCLIC+GUANOSINE+MONOPHOSPHATE'>PCG</scene>, <scene name='pdbligand=POL:N-PROPANOL'>POL</scene></td></tr>

<tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[1vp6|1vp6]], [[1u12|1u12]], [[3beh|3beh]], [[3clp|3clp]], [[3co2|3co2]]</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=3cl1 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3cl1 OCA], [http://pdbe.org/3cl1 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=3cl1 RCSB], [http://www.ebi.ac.uk/pdbsum/3cl1 PDBsum]</span></td></tr>

[[http://www.uniprot.org/uniprot/CNGK1_RHILO CNGK1_RHILO]] Cyclic nucleotide-regulated potassium channel activated by cAMP.<ref>PMID:15550244</ref>

<scriptWhenChecked>select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/cl/3cl1_consurf.spt"</scriptWhenChecked>

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== Publication Abstract from PubMed ==

MlotiK1 is a prokaryotic homolog of cyclic-nucleotide-dependent ion channels that contains an intracellular C-terminal cyclic nucleotide binding (CNB) domain. X-ray structures of the CNB domain have been solved in the absence of ligand and bound to cAMP. Both the full-length channel and CNB domain fragment are easily expressed and purified, making MlotiK1 a useful model system for dissecting activation by ligand binding. We have used X-ray crystallography to determine three new MlotiK1 CNB domain structures: a second apo configuration, a cGMP-bound structure, and a second cAMP-bound structure. In combination, the five MlotiK1 CNB domain structures provide a unique opportunity for analyzing, within a single protein, the structural differences between the apo state and the bound state, and the structural variability within each state. With this analysis as a guide, we have probed the nucleotide selectivity and importance of specific residue side chains in ligand binding and channel activation. These data help to identify ligand-protein interactions that are important for ligand dependence in MlotiK1 and, more globally, in the class of nucleotide-dependent proteins.

Structural and energetic analysis of activation by a cyclic nucleotide binding domain.,Altieri SL, Clayton GM, Silverman WR, Olivares AO, De la Cruz EM, Thomas LR, Morais-Cabral JH J Mol Biol. 2008 Sep 5;381(3):655-69. Epub 2008 Jun 10. PMID:18619611<ref>PMID:18619611</ref>

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[[Category: Alteiri, S L]]

[[Category: Clayton, G M]]

[[Category: Morais-Cabral, J H]]

[[Category: Thomas, L R]]

[[Category: Membrane protein]]