1br4

<table><tr><td colspan='2'>[[1br4]] is a 8 chain structure with sequence from [https://en.wikipedia.org/wiki/Chick Chick]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1BR4 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1BR4 FirstGlance]. <br>

</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=ADP:ADENOSINE-5-DIPHOSPHATE'>ADP</scene>, <scene name='pdbligand=BEF:BERYLLIUM+TRIFLUORIDE+ION'>BEF</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene></td></tr>

<tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[https://en.wikipedia.org/wiki/Myosin_ATPase Myosin ATPase], with EC number [https://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.6.4.1 3.6.4.1] </span></td></tr>

[[https://www.uniprot.org/uniprot/MYH11_CHICK MYH11_CHICK]] Muscle contraction. [[https://www.uniprot.org/uniprot/MYL6_CHICK MYL6_CHICK]] Regulatory light chain of myosin. Does not bind calcium.

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== Publication Abstract from PubMed ==

The crystal structures of an expressed vertebrate smooth muscle myosin motor domain (MD) and a motor domain-essential light chain (ELC) complex (MDE), both with a transition state analog (MgADP x AIF4-) in the active site, have been determined to 2.9 A and 3.5 A resolution, respectively. The MDE structure with an ATP analog (MgADP x BeFx) was also determined to 3.6 A resolution. In all three structures, a domain of the C-terminal region, the "converter," is rotated approximately 70 degrees from that in nucleotide-free skeletal subfragment 1 (S1). We have found that the MDE-BeFx and MDE-AIF4- structures are almost identical, consistent with the fact that they both bind weakly to actin. A comparison of the lever arm positions in MDE-AIF4- and in nucleotide-free skeletal S1 shows that a potential displacement of approximately 10 nm can be achieved during the power stroke.

Crystal structure of a vertebrate smooth muscle myosin motor domain and its complex with the essential light chain: visualization of the pre-power stroke state.,Dominguez R, Freyzon Y, Trybus KM, Cohen C Cell. 1998 Sep 4;94(5):559-71. PMID:9741621<ref>PMID:9741621</ref>

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

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== References ==

<references/>

[[Category: Chick]]

[[Category: Cohen, C]]

[[Category: Dominguez, R]]

[[Category: Trybus, K M]]

[[Category: Muscle protein]]