1m5h

<table><tr><td colspan='2'>[[1m5h]] is a 8 chain structure with sequence from [http://en.wikipedia.org/wiki/Arcfl Arcfl]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1M5H OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1M5H FirstGlance]. <br>

</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=K:POTASSIUM+ION'>K</scene></td></tr>

<tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[1ftr|1ftr]], [[1m5s|1m5s]]</td></tr>

<tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Formylmethanofuran--tetrahydromethanopterin_N-formyltransferase Formylmethanofuran--tetrahydromethanopterin N-formyltransferase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.3.1.101 2.3.1.101] </span></td></tr>

<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1m5h FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1m5h OCA], [http://pdbe.org/1m5h PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1m5h RCSB], [http://www.ebi.ac.uk/pdbsum/1m5h PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=1m5h ProSAT]</span></td></tr>

[[http://www.uniprot.org/uniprot/FTR_ARCFU FTR_ARCFU]] Catalyzes the transfer of a formyl group from 5-formyl tetrahydromethanopterin (5-formyl-H(4)MPT) to methanofuran (MFR) so as to produce formylmethanofuran (formyl-MFR) and tetrahydromethanopterin (H(4)MPT).<ref>PMID:8481089</ref>

<div style="background-color:#fffaf0;">

== Publication Abstract from PubMed ==

Formyltransferase catalyzes the reversible formation of formylmethanofuran from N(5)-formyltetrahydromethanopterin and methanofuran, a reaction involved in the C1 metabolism of methanogenic and sulfate-reducing archaea. The crystal structure of the homotetrameric enzyme from Methanopyrus kandleri (growth temperature optimum 98 degrees C) has recently been solved at 1.65 A resolution. We report here the crystal structures of the formyltransferase from Methanosarcina barkeri (growth temperature optimum 37 degrees C) and from Archaeoglobus fulgidus (growth temperature optimum 83 degrees C) at 1.9 A and 2.0 A resolution, respectively. Comparison of the structures of the three enzymes revealed very similar folds. The most striking difference found was the negative surface charge, which was -32 for the M. kandleri enzyme, only -8 for the M. barkeri enzyme, and -11 for the A. fulgidus enzyme. The hydrophobic surface fraction was 50% for the M. kandleri enzyme, 56% for the M. barkeri enzyme, and 57% for the A. fulgidus enzyme. These differences most likely reflect the adaptation of the enzyme to different cytoplasmic concentrations of potassium cyclic 2,3-diphosphoglycerate, which are very high in M. kandleri (&gt;1 M) and relatively low in M. barkeri and A. fulgidus. Formyltransferase is in a monomer/dimer/tetramer equilibrium that is dependent on the salt concentration. Only the dimers and tetramers are active, and only the tetramers are thermostable. The enzyme from M. kandleri is a tetramer, which is active and thermostable only at high concentrations of potassium phosphate (&gt;1 M) or potassium cyclic 2,3-diphosphoglycerate. Conversely, the enzyme from M. barkeri and A. fulgidus already showed these properties, activity and stability, at much lower concentrations of these strong salting-out salts.

Crystal structures and enzymatic properties of three formyltransferases from archaea: environmental adaptation and evolutionary relationship.,Mamat B, Roth A, Grimm C, Ermler U, Tziatzios C, Schubert D, Thauer RK, Shima S Protein Sci. 2002 Sep;11(9):2168-78. PMID:12192072<ref>PMID:12192072</ref>

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

</div>

<div class="pdbe-citations 1m5h" style="background-color:#fffaf0;"></div>

[[Category: Arcfl]]

[[Category: Formylmethanofuran--tetrahydromethanopterin N-formyltransferase]]

[[Category: Ermler, U]]

[[Category: Grimm, C]]

[[Category: Mamat, B]]

[[Category: Roth, A]]

[[Category: Schubert, D]]

[[Category: Shima, S]]

[[Category: Thauer, R K]]

[[Category: Tziatzios, C]]

[[Category: Transferase]]