3p0b: Difference between revisions
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==Thermus thermophilus family GH57 branching enzyme: crystal structure, mechanism of action and products formed== | |||
<StructureSection load='3p0b' size='340' side='right'caption='[[3p0b]], [[Resolution|resolution]] 1.35Å' scene=''> | |||
== Structural highlights == | |||
<table><tr><td colspan='2'>[[3p0b]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Thermus_thermophilus Thermus thermophilus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3P0B OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3P0B 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]] 1.35Å</td></tr> | |||
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=GOL:GLYCEROL'>GOL</scene></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=3p0b FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3p0b OCA], [https://pdbe.org/3p0b PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3p0b RCSB], [https://www.ebi.ac.uk/pdbsum/3p0b PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3p0b ProSAT]</span></td></tr> | |||
</table> | |||
== Function == | |||
[https://www.uniprot.org/uniprot/BE_THET8 BE_THET8] Catalyzes the formation of branch points in alpha-glucans by cleavage of an alpha-1,4 glycosidic bond and subsequent transfer of the cleaved-off oligosaccharide to a new alpha-1,6 position. The branch chain-length distribution of the reaction products shows degree of polymerization (DP) of 3 to 13, with two local maxima at DP 7 and DP 11. Exhibits an alpha-retaining catalytic mechanism. Is involved in glycogen biosynthesis. Shows a secondary activity, i.e. the hydrolysis of the substrate, being 4% of the total activity. Can use amylose as substrate but not alpha-1,4-linked oligosaccharides of 2-7 glucose residues, beta-cyclodextrin, 6-O-glucosyl-beta-cyclodextrin and 6-O-maltosyl-beta-cyclodextrin. Is not able to branch amylopectin further, it only hydrolyzes amylopectin. Thus, displays preference for linear and long substrates (amylose) over branched structures (amylopectin).<ref>PMID:21097495</ref> | |||
== References == | |||
== | <references/> | ||
__TOC__ | |||
</StructureSection> | |||
[[Category: Large Structures]] | |||
[[Category: Thermus thermophilus]] | [[Category: Thermus thermophilus]] | ||
[[Category: Dijkstra | [[Category: Dijkstra BW]] | ||
[[Category: Pijning | [[Category: Pijning T]] | ||
Latest revision as of 16:59, 1 November 2023
Thermus thermophilus family GH57 branching enzyme: crystal structure, mechanism of action and products formed
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