|
|
| (One intermediate revision not shown.) |
| Line 1: |
Line 1: |
| | | | |
| | ==The solution structure of phototactic transducer protein HtrII linker region from Natronomonas pharaonis== | | ==The solution structure of phototactic transducer protein HtrII linker region from Natronomonas pharaonis== |
| - | <StructureSection load='2rm8' size='340' side='right' caption='[[2rm8]], [[NMR_Ensembles_of_Models | 20 NMR models]]' scene=''> | + | <StructureSection load='2rm8' size='340' side='right'caption='[[2rm8]]' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[2rm8]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/Atcc_35678 Atcc 35678]. Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2RM8 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2RM8 FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[2rm8]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Natronomonas_pharaonis Natronomonas pharaonis]. Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2RM8 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2RM8 FirstGlance]. <br> |
| - | </td></tr><tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">htrII ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=2257 ATCC 35678])</td></tr> | + | </td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">Solution NMR</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=2rm8 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2rm8 OCA], [http://pdbe.org/2rm8 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=2rm8 RCSB], [http://www.ebi.ac.uk/pdbsum/2rm8 PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=2rm8 ProSAT]</span></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=2rm8 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2rm8 OCA], [https://pdbe.org/2rm8 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2rm8 RCSB], [https://www.ebi.ac.uk/pdbsum/2rm8 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2rm8 ProSAT]</span></td></tr> |
| | </table> | | </table> |
| | == Function == | | == Function == |
| - | [[http://www.uniprot.org/uniprot/HTR2_NATPH HTR2_NATPH]] Transduces signals from the phototaxis receptor sensory rhodopsin II (SR-II) to the flagellar motor. Responds to light changes through the variation of the level of methylation. Also acts as a chemotransducer. | + | [https://www.uniprot.org/uniprot/HTR2_NATPH HTR2_NATPH] Transduces signals from the phototaxis receptor sensory rhodopsin II (SR-II) to the flagellar motor. Responds to light changes through the variation of the level of methylation. Also acts as a chemotransducer. |
| | == Evolutionary Conservation == | | == Evolutionary Conservation == |
| | [[Image:Consurf_key_small.gif|200px|right]] | | [[Image:Consurf_key_small.gif|200px|right]] |
| Line 32: |
Line 32: |
| | __TOC__ | | __TOC__ |
| | </StructureSection> | | </StructureSection> |
| - | [[Category: Atcc 35678]] | + | [[Category: Large Structures]] |
| - | [[Category: Hara, H]] | + | [[Category: Natronomonas pharaonis]] |
| - | [[Category: Hayashi, K]] | + | [[Category: Hara H]] |
| - | [[Category: Jee, J]] | + | [[Category: Hayashi K]] |
| - | [[Category: Kamo, N]] | + | [[Category: Jee J]] |
| - | [[Category: Kojima, C]] | + | [[Category: Kamo N]] |
| - | [[Category: Mishima, M]] | + | [[Category: Kojima C]] |
| - | [[Category: Sudo, Y]] | + | [[Category: Mishima M]] |
| - | [[Category: Chemotaxis]]
| + | [[Category: Sudo Y]] |
| - | [[Category: Chromophore]]
| + | |
| - | [[Category: Membrane]]
| + | |
| - | [[Category: Methylation]]
| + | |
| - | [[Category: Photoreceptor protein]]
| + | |
| - | [[Category: Protein]]
| + | |
| - | [[Category: Receptor]]
| + | |
| - | [[Category: Sensory transduction]]
| + | |
| - | [[Category: Signaling protein]]
| + | |
| - | [[Category: Transducer]]
| + | |
| - | [[Category: Transmembrane]]
| + | |
| Structural highlights
Function
HTR2_NATPH Transduces signals from the phototaxis receptor sensory rhodopsin II (SR-II) to the flagellar motor. Responds to light changes through the variation of the level of methylation. Also acts as a chemotransducer.
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
Halobacterial pharaonis phoborhodopsin [ppR, also called Natronomonas pharaonis sensory rhodopsin II (NpSRII)] is a phototaxis protein which transmits a light signal to the cytoplasm through its transducer protein (pHtrII). pHtrII, a two-transmembrane protein that interacts with ppR, belongs to the group of methyl-accepting chemotaxis proteins (MCPs). Several mutation studies have indicated that the linker region connecting the transmembrane and methylation regions is necessary for signal transduction. However, the three-dimensional (3D) structure of an MCP linker region has yet to be reported, and hence, details concerning the signal transduction mechanism remain unknown. Here the structure of the pHtrII linker region was investigated biochemically and biophysically. Following limited proteolysis, only one trypsin resistant fragment in the pHtrII linker region was identified. This fragment forms a homodimer with a Kd value of 115 muM. The 3D structure of this fragment was determined by solution NMR, and only one alpha-helix was found between two HAMP domains of the linker region. This alpha-helix was significantly stabilized within transmembrane protein pHtrII as revealed by CW-EPR. The presence of Af1503 HAMP domain-like structures in the linker region was supported by CD, NMR, and ELDOR data. The alpha-helix determined here presumably works as a mechanical joint between two HAMP domains in the linker region to transfer the photoactivated conformational change downstream.
Structural Analysis of the Phototactic Transducer Protein HtrII Linker Region from Natronomonas pharaonis(,).,Hayashi K, Sudo Y, Jee J, Mishima M, Hara H, Kamo N, Kojima C Biochemistry. 2007 Dec 18;46(50):14380-14390. Epub 2007 Nov 15. PMID:18001143[1]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
References
- ↑ Hayashi K, Sudo Y, Jee J, Mishima M, Hara H, Kamo N, Kojima C. Structural Analysis of the Phototactic Transducer Protein HtrII Linker Region from Natronomonas pharaonis(,). Biochemistry. 2007 Dec 18;46(50):14380-14390. Epub 2007 Nov 15. PMID:18001143 doi:10.1021/bi701837n
|
