3fms: Difference between revisions

<table><tr><td colspan='2'>[[3fms]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Thema Thema]. This structure supersedes the now removed PDB entry [http://oca.weizmann.ac.il/oca-bin/send-pdb?obs=1&id=3dbw 3dbw]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3FMS OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3FMS FirstGlance]. <br>

<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=3fms FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3fms OCA], [https://pdbe.org/3fms PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3fms RCSB], [https://www.ebi.ac.uk/pdbsum/3fms PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3fms ProSAT], [https://www.topsan.org/Proteins/ISFI/3fms TOPSAN]</span></td></tr>

The GntR superfamily of dimeric transcription factors, with more than 6200 members encoded in bacterial genomes, are characterized by N-terminal winged-helix DNA-binding domains and diverse C-terminal regulatory domains which provide a basis for the classification of the constituent families. The largest of these families, FadR, contains nearly 3000 proteins with all-alpha-helical regulatory domains classified into two related Pfam families: FadR_C and FCD. Only two crystal structures of FadR-family members, those of Escherichia coli FadR protein and LldR from Corynebacterium glutamicum, have been described to date in the literature. Here, the crystal structure of TM0439, a GntR regulator with an FCD domain found in the Thermotoga maritima genome, is described. The FCD domain is similar to that of the LldR regulator and contains a buried metal-binding site. Using atomic absorption spectroscopy and Trp fluorescence, it is shown that the recombinant protein contains bound Ni(2+) ions but that it is able to bind Zn(2+) with K(d) &lt; 70 nM. It is concluded that Zn(2+) is the likely physiological metal and that it may perform either structural or regulatory roles or both. Finally, the TM0439 structure is compared with two other FadR-family structures recently deposited by structural genomics consortia. The results call for a revision in the classification of the FadR family of transcription factors.

Structure of Thermotoga maritima TM0439: implications for the mechanism of bacterial GntR transcription regulators with Zn2+-binding FCD domains.,Zheng M, Cooper DR, Grossoehme NE, Yu M, Hung LW, Cieslik M, Derewenda U, Lesley SA, Wilson IA, Giedroc DP, Derewenda ZS Acta Crystallogr D Biol Crystallogr. 2009 Apr;65(Pt 4):356-65. Epub 2009, Mar 19. PMID:19307717<ref>PMID:19307717</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>

<div class="pdbe-citations 3fms" style="background-color:#fffaf0;"></div>

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[[Category: PSI, Protein structure initiative]]

[[Category: Structural genomic]]

[[Category: Surface entropy reduction]]