View source for 1dix


==CRYSTAL STRUCTURE OF RNASE LE==
<StructureSection load='1dix' size='340' side='right' caption='[[1dix]], [[Resolution|resolution]] 1.65&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[1dix]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/Lycopersicon_esculentum Lycopersicon esculentum]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1DIX OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1DIX FirstGlance]. <br>
</td></tr><tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Ribonuclease_T(2) Ribonuclease T(2)], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.1.27.1 3.1.27.1] </span></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=1dix FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1dix OCA], [http://pdbe.org/1dix PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1dix RCSB], [http://www.ebi.ac.uk/pdbsum/1dix PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=1dix ProSAT]</span></td></tr>
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== Function ==
[[http://www.uniprot.org/uniprot/RNLE_SOLLC RNLE_SOLLC]] Probably involved in plant phosphate-starvation rescue system. 
== 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/di/1dix_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=1dix ConSurf].
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== Publication Abstract from PubMed ==
Ribonuclease LE (RNase LE) from cultured tomato (Lycopersicon esculentum) cells is a member of the RNase T(2) family showing broad base specificity. The crystal structure of RNase LE has been determined at 1.65 A resolution. The structure consists of seven alpha-helices and seven beta-strands, belonging to an alpha+beta type structure. Comparison of the structure of RNase LE with that of RNase Rh, a microbial RNase belonging to the RNase T(2) family, reveals that while the overall folding topologies are similar to each other, major insertions and deletions are found at the N-terminal regions. The structural comparison, an amino acid sequence alignment of the RNase T(2) enzymes, and comparison of the disulfide-bonding pattern of these enzymes show that the structure of RNase LE shown here is the basic framework of the animal/plant subfamily of RNase T(2) enzymes (including a self-incompatibility protein called S-RNase), and the structure of RNase Rh is that of the fungal subfamily of RNase T(2) enzymes (including RNase T(2)). Subsequently, we superposed the active-site of the RNase LE with that of RNase Rh and found that (1) His39, Trp42, His92, Glu93, Lys96, and His97 of RNase LE coincided exactly with His46, Trp49, His104, Glu105, Lys108, and His109, respectively, of RNase Rh, and (2) two conserved water molecules were found at the putative P(1) sites of both enzymes. These facts suggest that plant RNase LE has a very similar hydrolysis mechanism to that of fungal RNase Rh, and almost all the RNase T(2) enzymes widely distributed in various species share a common catalytic mechanism. A cluster of hydrophobic residues was found on the active-site face of the RNase LE molecule and two large hydrophobic pockets exist. These hydrophobic pockets appear to be base binding sites mainly by hydrophobic interactions and are responsible for the base non-specificity of RNase LE.

Crystal structure of a plant ribonuclease, RNase LE.,Tanaka N, Arai J, Inokuchi N, Koyama T, Ohgi K, Irie M, Nakamura KT J Mol Biol. 2000 May 19;298(5):859-73. PMID:10801354<ref>PMID:10801354</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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==See Also==
*[[Temp|Temp]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Lycopersicon esculentum]]
[[Category: Nakamura, K T]]
[[Category: Tanaka, N]]
[[Category: Alpha plus beta]]
[[Category: Hydrolase]]