1ckm

<table><tr><td colspan='2'>[[1ckm]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Chlorella_pbcv-1_virus Chlorella pbcv-1 virus]. The January 2012 RCSB PDB [https://pdb.rcsb.org/pdb/static.do?p=education_discussion/molecule_of_the_month/index.html Molecule of the Month] feature on ''Messenger RNA Capping'' by David Goodsell is [https://dx.doi.org/10.2210/rcsb_pdb/mom_2012_1 10.2210/rcsb_pdb/mom_2012_1]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1CKM OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1CKM FirstGlance]. <br>

</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=GTP:GUANOSINE-5-TRIPHOSPHATE'>GTP</scene></td></tr>

<tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[https://en.wikipedia.org/wiki/mRNA_guanylyltransferase mRNA guanylyltransferase], with EC number [https://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.7.7.50 2.7.7.50] </span></td></tr>

[[https://www.uniprot.org/uniprot/MCE_PBCV1 MCE_PBCV1]] mRNA capping. Transfers a GMP cap onto the end of mRNA that terminates with a 5'-diphosphate tail.

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== Publication Abstract from PubMed ==

We have solved the crystal structure of an mRNA capping enzyme at 2.5 A resolution. The enzyme comprises two domains with a deep, but narrow, cleft between them. The two molecules in the crystallographic asymmetric unit adopt very different conformations; both contain a bound GTP, but one protein molecule is in an open conformation while the other is in a closed conformation. Only in the closed conformation is the enzyme able to bind manganese ions and undergo catalysis within the crystals to yield the covalent guanylated enzyme intermediate. These structures provide direct evidence for a mechanism that involves a significant conformational change in the enzyme during catalysis.

X-ray crystallography reveals a large conformational change during guanyl transfer by mRNA capping enzymes.,Hakansson K, Doherty AJ, Shuman S, Wigley DB Cell. 1997 May 16;89(4):545-53. PMID:9160746<ref>PMID:9160746</ref>

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

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== References ==

<references/>

[[Category: Chlorella pbcv-1 virus]]

[[Category: Doherty, A J]]

[[Category: Hakansson, K]]

[[Category: Wigley, D B]]

[[Category: Nucleotidyltransferase]]