1tht: Difference between revisions

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New page: left|200px<br /><applet load="1tht" size="450" color="white" frame="true" align="right" spinBox="true" caption="1tht, resolution 2.1Å" /> '''STRUCTURE OF A MYRIST...
 
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'''STRUCTURE OF A MYRISTOYL-ACP-SPECIFIC THIOESTERASE FROM VIBRIO HARVEYI'''<br />


==Overview==
==STRUCTURE OF A MYRISTOYL-ACP-SPECIFIC THIOESTERASE FROM VIBRIO HARVEYI==
The crystal structure of a myristoyl acyl carrier protein specific, thioesterase (C14ACP-TE) from a bioluminescent bacterium, Vibrio harveyi, was solved by multiple isomorphous replacement methods and refined to an R, factor of 22% at 2.1-A resolution. This is the first elucidation of a, three-dimensional structure of a thioesterase. The overall tertiary, architecture of the enzyme resembles closely the consensus fold of the, rapidly expanding superfamily of alpha/beta hydrolases, although there is, no detectable homology with any of its members at the amino acid sequence, level. Particularly striking similarity exists between the C14ACP-TE, structure and that of haloalkane dehalogenase from Xanthobacter, autotrophicus. Contrary to the conclusions of earlier studies [Ferri, S., R., &amp; Meighen, E. A. (1991) J. Biol. Chem. 266, 12852-12857] which, implicated Ser77 in catalysis, the crystal structure of C14ACP-TE reveals, a lipase-like catalytic triad made up of Ser114, His241, and Asp211., Surprisingly, the gamma-turn with Ser114 in a strained secondary, conformation (phi = 53 degrees, psi = -127 degrees), characteristic of the, so-called nucleophilic elbow, does not conform to the frequently invoked, lipase/esterase consensus sequence (Gly-X-Ser-X-Gly), as the positions of, both glycines are occupied by larger amino acids. Site-directed, mutagenesis and radioactive labeling support the catalytic function of, Ser114. Crystallographic analysis of the Ser77--&gt;Gly mutant at 2.5-A, resolution revealed no structural changes; in both cases the loop, containing the residue in position 77 is disordered.(ABSTRACT TRUNCATED AT, 250 WORDS)
<StructureSection load='1tht' size='340' side='right'caption='[[1tht]], [[Resolution|resolution]] 2.10&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[1tht]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Vibrio_harveyi Vibrio harveyi]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1THT OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1THT FirstGlance]. <br>
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.1&#8491;</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=1tht FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1tht OCA], [https://pdbe.org/1tht PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1tht RCSB], [https://www.ebi.ac.uk/pdbsum/1tht PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1tht ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/LUXD_VIBHA LUXD_VIBHA] Acyl transferase is part of the fatty acid reductase system required for aldehyde biosynthesis; it produces fatty acids for the luminescent reaction.
== 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/th/1tht_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=1tht ConSurf].
<div style="clear:both"></div>


==About this Structure==
==See Also==
1THT is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Vibrio_harveyi Vibrio harveyi]. Full crystallographic information is available from [http://ispc.weizmann.ac.il/oca-bin/ocashort?id=1THT OCA].
*[[Thioesterase 3D structures|Thioesterase 3D structures]]
 
__TOC__
==Reference==
</StructureSection>
Structure of a myristoyl-ACP-specific thioesterase from Vibrio harveyi., Lawson DM, Derewenda U, Serre L, Ferri S, Szittner R, Wei Y, Meighen EA, Derewenda ZS, Biochemistry. 1994 Aug 16;33(32):9382-8. PMID:[http://ispc.weizmann.ac.il//pmbin/getpm?pmid=8068614 8068614]
[[Category: Large Structures]]
[[Category: Single protein]]
[[Category: Vibrio harveyi]]
[[Category: Vibrio harveyi]]
[[Category: Derewenda, U.]]
[[Category: Derewenda U]]
[[Category: Derewenda, Z.S.]]
[[Category: Derewenda ZS]]
[[Category: Ferri, S.]]
[[Category: Ferri S]]
[[Category: Lawson, D.M.]]
[[Category: Lawson DM]]
[[Category: Meighen, E.A.]]
[[Category: Meighen EA]]
[[Category: Serre, L.]]
[[Category: Serre L]]
[[Category: Szitter, R.]]
[[Category: Szitter R]]
[[Category: Wei, Y.]]
[[Category: Wei Y]]
[[Category: thioesterase]]
 
''Page seeded by [http://ispc.weizmann.ac.il/oca OCA ] on Wed Nov 21 03:16:35 2007''

Latest revision as of 11:39, 14 February 2024

STRUCTURE OF A MYRISTOYL-ACP-SPECIFIC THIOESTERASE FROM VIBRIO HARVEYISTRUCTURE OF A MYRISTOYL-ACP-SPECIFIC THIOESTERASE FROM VIBRIO HARVEYI

Structural highlights

1tht is a 2 chain structure with sequence from Vibrio harveyi. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Method:X-ray diffraction, Resolution 2.1Å
Resources:FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

LUXD_VIBHA Acyl transferase is part of the fatty acid reductase system required for aldehyde biosynthesis; it produces fatty acids for the luminescent reaction.

Evolutionary Conservation

Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf.

See Also

1tht, resolution 2.10Å

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