2i56

<table><tr><td colspan='2'>[[2i56]] is a 4 chain structure with sequence from [https://en.wikipedia.org/wiki/"achromobacter_sewerinii"_bergey_et_al._1923 "achromobacter sewerinii" bergey et al. 1923]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2I56 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2I56 FirstGlance]. <br>

</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=RNS:L-RHAMNOSE'>RNS</scene>, <scene name='pdbligand=ZN:ZINC+ION'>ZN</scene></td></tr>

<tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat"><div style='overflow: auto; max-height: 3em;'>[[2hcv|2hcv]], [[2i57|2i57]]</div></td></tr>

<tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[https://en.wikipedia.org/wiki/L-rhamnose_isomerase L-rhamnose isomerase], with EC number [https://www.brenda-enzymes.info/php/result_flat.php4?ecno=5.3.1.14 5.3.1.14] </span></td></tr>

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== Publication Abstract from PubMed ==

Pseudomonas stutzeri L-rhamnose isomerase (P. stutzeri L-RhI) can efficiently catalyze the isomerization between various aldoses and ketoses, showing a broad substrate specificity compared to L-RhI from Escherichia coli (E. coli L-RhI). To understand the relationship between structure and substrate specificity, the crystal structures of P. stutzeri L-RhI alone and in complexes with L-rhamnose and D-allose which has different configurations of C4 and C5 from L-rhamnose, were determined at a resolution of 2.0 A, 1.97 A, and 1.97 A, respectively. P. stutzeri L-RhI has a large domain with a (beta/alpha)(8) barrel fold and an additional small domain composed of seven alpha-helices, forming a homo tetramer, as found in E. coli L-RhI and D-xylose isomerases (D-XIs) from various microorganisms. The beta1-alpha1 loop (Gly60-Arg76) of P. stutzeri L-RhI is involved in the substrate binding of a neighbouring molecule, as found in D-XIs, while in E. coli L-RhI, the corresponding beta1-alpha1 loop is extended (Asp52-Arg78) and covers the substrate-binding site of the same molecule. The complex structures of P. stutzeri L-RhI with L-rhamnose and D-allose show that both substrates are nicely fitted to the substrate-binding site. The part of the substrate-binding site interacting with the substrate at the 1, 2, and 3 positions is equivalent to E. coli L-RhI, and the other part interacting with the 4, 5, and 6 positions is similar to D-XI. In E. coli L-RhI, the beta1-alpha1 loop creates an unique hydrophobic pocket at the the 4, 5, and 6 positions, leading to the strictly recognition of L-rhamnose as the most suitable substrate, while in P. stutzeri L-RhI, there is no corresponding hydrophobic pocket where Phe66 from a neighbouring molecule merely forms hydrophobic interactions with the substrate, leading to the loose substrate recognition at the 4, 5, and 6 positions.

The structures of L-rhamnose isomerase from Pseudomonas stutzeri in complexes with L-rhamnose and D-allose provide insights into broad substrate specificity.,Yoshida H, Yamada M, Ohyama Y, Takada G, Izumori K, Kamitori S J Mol Biol. 2007 Feb 2;365(5):1505-16. Epub 2006 Nov 6. PMID:17141803<ref>PMID:17141803</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 2i56" style="background-color:#fffaf0;"></div>

== References ==

<references/>

[[Category: Achromobacter sewerinii bergey et al. 1923]]

[[Category: L-rhamnose isomerase]]

[[Category: Izumori, K]]

[[Category: Kamitori, S]]

[[Category: Takada, G]]

[[Category: Yamada, M]]

[[Category: Yoshida, H]]

[[Category: Tim barrel]]