View source for 1fhl


==CRYSTAL STRUCTURE OF BETA-1,4-GALACTANASE FROM ASPERGILLUS ACULEATUS AT 293K==
<StructureSection load='1fhl' size='340' side='right'caption='[[1fhl]], [[Resolution|resolution]] 2.30&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[1fhl]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Aspergillus_aculeatus Aspergillus aculeatus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1FHL OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1FHL 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]] 2.3&#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=1fhl FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1fhl OCA], [https://pdbe.org/1fhl PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1fhl RCSB], [https://www.ebi.ac.uk/pdbsum/1fhl PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1fhl ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/GANA_ASPAC GANA_ASPAC] 
== 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/fh/1fhl_consurf.spt"</scriptWhenChecked>
    <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview03.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=1fhl ConSurf].
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== Publication Abstract from PubMed ==
The three-dimensional structure of Aspergillus aculeatus beta-1,4-galactanase (AAGAL), an enzyme involved in pectin degradation, has been determined by multiple isomorphous replacement to 2.3 and 1.8 A resolution at 293 and 100 K, respectively. It represents the first known structure for a polysaccharidase with this specificity and for a member of glycoside hydrolase family 53 (GH-53). The enzyme folds into a (beta/alpha)(8) barrel with the active site cleft located at the C-terminal side of the barrel consistent with the classification of GH-53 in clan GH-A, a superfamily of enzymes with common fold and catalytic machinery but diverse specificities. Putative substrate-enzyme interactions were elucidated by modeling of beta-1,4-linked galactobioses into the possible substrate binding subsites. The structure and modeling studies identified five potential subsites for the binding of galactans, of which one is a pocket suited for accommodating the arabinan side chain in arabinogalactan, one of the natural substrates. A comparison with the substrate binding grooves of other Clan GH-A enzymes suggests that shape complementarity is crucial in determining the specificity of polysaccharidases.

Aspergillus aculeatus beta-1,4-galactanase: substrate recognition and relations to other glycoside hydrolases in clan GH-A.,Ryttersgaard C, Lo Leggio L, Coutinho PM, Henrissat B, Larsen S Biochemistry. 2002 Dec 24;41(51):15135-43. PMID:12484750<ref>PMID:12484750</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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<div class="pdbe-citations 1fhl" style="background-color:#fffaf0;"></div>

==See Also==
*[[Beta-1%2C4-galactanase|Beta-1%2C4-galactanase]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Aspergillus aculeatus]]
[[Category: Large Structures]]
[[Category: Larsen S]]
[[Category: Ryttersgaard C]]