View source for 3rpb


==THE C2B-DOMAIN OF RABPHILIN: STRUCTURAL VARIATIONS IN A JANUS-FACED DOMAIN==
<StructureSection load='3rpb' size='340' side='right'caption='[[3rpb]]' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[3rpb]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Rattus_norvegicus Rattus norvegicus]. Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3RPB OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3RPB FirstGlance]. <br>
</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'>[https://proteopedia.org/fgij/fg.htm?mol=3rpb FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3rpb OCA], [https://pdbe.org/3rpb PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3rpb RCSB], [https://www.ebi.ac.uk/pdbsum/3rpb PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3rpb ProSAT]</span></td></tr>
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== Function ==
[https://www.uniprot.org/uniprot/RP3A_RAT RP3A_RAT] Protein transport. Probably involved with Ras-related protein Rab-3A in synaptic vesicle traffic and/or synaptic vesicle fusion. Could play a role in neurotransmitter release by regulating membrane flow in the nerve terminal.
== 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/rp/3rpb_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=3rpb ConSurf].
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== Publication Abstract from PubMed ==
C2 domains are widespread protein modules that often occur as tandem repeats in many membrane-trafficking proteins such as synaptotagmin and rabphilin. The first and second C2 domains (C2A and C2B, respectively) have a high degree of homology but also specific differences. The structure of the C2A domain of synaptotagmin I has been extensively studied but little is known about the C2B domains. We have used NMR spectroscopy to determine the solution structure of the C2B domain of rabphilin. The overall structure of the C2B domain is very similar to that of other C2 domains, with a rigid beta-sandwich core and loops at the top (where Ca2+ binds) and the bottom. Surprisingly, a relatively long alpha-helix is inserted at the bottom of the domain and is conserved in all C2B domains. Our results, together with the Ca(2+)-independent interactions observed for C2B domains, indicate that these domains have a Janus-faced nature, with a Ca(2+)-binding top surface and a Ca(2+)-independent bottom surface.

Structure of the Janus-faced C2B domain of rabphilin.,Ubach J, Garcia J, Nittler MP, Sudhof TC, Rizo J Nat Cell Biol. 1999 Jun;1(2):106-12. PMID:10559882<ref>PMID:10559882</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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==See Also==
*[[Exophilin 3D structures|Exophilin 3D structures]]
*[[Rabphilin|Rabphilin]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Large Structures]]
[[Category: Rattus norvegicus]]
[[Category: Garcia J]]
[[Category: Nittler MP]]
[[Category: Rizo J]]
[[Category: Sudhof TC]]
[[Category: Ubach J]]