5yly

<table><tr><td colspan='2'>[[5yly]] is a 2 chain structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=5YLY OCA]. For a <b>guided tour on the structure components</b> use [http://proteopedia.org/fgij/fg.htm?mol=5YLY FirstGlance]. <br>

</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=FAD:FLAVIN-ADENINE+DINUCLEOTIDE'>FAD</scene></td></tr>

<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://proteopedia.org/fgij/fg.htm?mol=5yly FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=5yly OCA], [http://pdbe.org/5yly PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=5yly RCSB], [http://www.ebi.ac.uk/pdbsum/5yly PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=5yly ProSAT]</span></td></tr>

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== Publication Abstract from PubMed ==

Rapid accumulations of unattached green macroalgae, referred to as blooms, constitute ecological disasters and occur in many coastal regions. Ulva are a major cause of blooms, owing to their high nitrogen utilization capacity, which requires nitrate reductase (NR) activity; however, molecular characterization of Ulva NR remains lacking. Herein we determined the crystal structure and performed an enzymatic analysis of the cytochrome b5 reductase domain of Ulva prolifera NR (UpCbRNR). The structural analysis revealed an N-terminal FAD-binding domain primarily consisting of six antiparallel beta strands, a C-terminal NADH-binding domain forming a Rossmann fold, and a three beta-stranded linker region connecting these two domains. The FAD cofactor was located in the cleft between the two domains and interacted primarily with the FAD-binding domain. UpCbRNR shares similarities in overall structure and cofactor interactions with homologs, and its catalytic ability is comparable to that of higher plant CbRNRs. Structure and sequence comparisons of homologs revealed two regions of sequence length variation potentially useful for phylogenetic analysis: one in the FAD-binding domain, specific to U. prolifera, and another in the linker region that may be used to differentiate between plant, fungi, and animal homologs. Our data will facilitate molecular-level understanding of nitrate assimilation in Ulva.

 

 

== References ==

<references/>

[[Category: Ma, Q]]

[[Category: You, C]]

[[Category: Cytochrome b5 reductase domain]]

[[Category: Fad]]

[[Category: Flavoprotein]]

[[Category: Nitrate reductase]]