View source for 1t50


==NMR SOLUTION STRUCTURE OF APLYSIA ATTRACTIN==
<StructureSection load='1t50' size='340' side='right'caption='[[1t50]]' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[1t50]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Aplysia_californica Aplysia californica]. This structure supersedes the now removed PDB entry [http://oca.weizmann.ac.il/oca-bin/send-pdb?obs=1&id=1nj7 1nj7]. Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1T50 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1T50 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=1t50 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1t50 OCA], [https://pdbe.org/1t50 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1t50 RCSB], [https://www.ebi.ac.uk/pdbsum/1t50 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1t50 ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/ATT_APLCA ATT_APLCA] Water-borne pheromone that attract the marine mollusk Aplysia into breeding aggregations and coordinate male and female reproductive behavior within the aggregation (By similarity).<ref>PMID:12917218</ref> <ref>PMID:15054104</ref> 
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Water-borne protein pheromones are essential for coordination of reproductive activities in many marine organisms. In this paper, we describe the first structure of a pheromone protein from a marine organism, that of attractin (58 residues) from Aplysia californica. The NMR solution structure was determined from TOCSY, NOESY, and DQF-COSY measurements of recombinant attractin expressed in insect cells. The sequential resonance assignments were done with standard manual procedures. Approximately 90% of the 949 unambiguous NOESY cross-peaks were assigned automatically with simultaneous three-dimensional structure calculation using our NOAH/DIAMOD/FANTOM program suite. The final bundle of energy-refined structures is well-defined, with an average rmsd value to the mean structure of 0.72 +/- 0.12 A for backbone and 1.32 +/- 0.11 A for heavy atoms for amino acids 3-47. Attractin contains two antiparallel helices, made up of residues Ile9-Gln16 and I30-S36. The NMR distance constraints are consistent with the three disulfide bonds determined by mass spectroscopy (C4-C41, C13-C33, and C20-C26), where the first two could be directly determined from NOESY cross-peaks between CH beta protons of the corresponding cysteines. The second helix contains the (L/I)(29)IEECKTS(36) sequence conserved in attractins from five species of Aplysia that could interact with the receptor. The sequence and structure of this region are similar to those of the recognition helix of the Er-11 pheromone of the unicellular ciliate Euplotes raikovi, suggesting a possible common pathway for intercellular communication of these two distinct pheromone families.

NMR solution structure of attractin, a water-borne protein pheromone from the mollusk Aplysia californica.,Garimella R, Xu Y, Schein CH, Rajarathnam K, Nagle GT, Painter SD, Braun W Biochemistry. 2003 Aug 26;42(33):9970-9. PMID:12924946<ref>PMID:12924946</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 1t50" style="background-color:#fffaf0;"></div>
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Aplysia californica]]
[[Category: Large Structures]]
[[Category: Braun W]]
[[Category: Nagle GT]]
[[Category: Painter SD]]
[[Category: Rajaratnam K]]
[[Category: Ravindranath G]]
[[Category: Schein CH]]
[[Category: Xu Y]]