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3i5g

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Revision as of 11:52, 23 September 2020

Crystal structure of rigor-like squid myosin S1

Structural highlights

3i5g is a 3 chain structure with sequence from Loligo pealei and Todarodes pacificus. This structure supersedes the now removed PDB entry 2ovk. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Ligands:	,
Related:	2oy6, 3i5f, 3i5h, 3i5i
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

[MLE_TODPA] In molluscan muscle, calcium regulation is associated with myosin rather than with actin. Muscle myosin contains two types of light chains: the catalytic light chain, essential for ATPase activity, and the regulatory light chain, a calcium-binding protein responsible for Ca(2+) dependent binding and Ca(2+) dependent Mg-ATPase activity. [MLR_TODPA] In molluscan muscle, calcium regulation is associated with myosin rather than with actin. Muscle myosin contains two types of light chains: the catalytic light chain, essential for ATPase activity, and the regulatory light chain, a calcium-binding protein responsible for Ca(2+) dependent binding and Ca(2+) dependent Mg-ATPase activity.

Evolutionary Conservation

Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf.

Publication Abstract from PubMed

Unlike processive cellular motors such as myosin V, whose structure has recently been determined in a "rigor-like" conformation, myosin II from contracting muscle filaments necessarily spends most of its time detached from actin. By using squid and sea scallop sources, however, we have now obtained similar rigor-like atomic structures for muscle myosin heads (S1). The significance of the hallmark closed actin-binding cleft in these crystal structures is supported here by actin/S1-binding studies. These structures reveal how different duty ratios, and hence cellular functions, of the myosin isoforms may be accounted for, in part, on the basis of detailed differences in interdomain contacts. Moreover, the rigor-like position of switch II turns out to be unique for myosin V. The overall arrangements of subdomains in the motor are relatively conserved in each of the known contractile states, and we explore qualitatively the energetics of these states.

Rigor-like structures from muscle myosins reveal key mechanical elements in the transduction pathways of this allosteric motor.,Yang Y, Gourinath S, Kovacs M, Nyitray L, Reutzel R, Himmel DM, O'Neall-Hennessey E, Reshetnikova L, Szent-Gyorgyi AG, Brown JH, Cohen C Structure. 2007 May;15(5):553-64. PMID:17502101^[1]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

References

↑ Yang Y, Gourinath S, Kovacs M, Nyitray L, Reutzel R, Himmel DM, O'Neall-Hennessey E, Reshetnikova L, Szent-Gyorgyi AG, Brown JH, Cohen C. Rigor-like structures from muscle myosins reveal key mechanical elements in the transduction pathways of this allosteric motor. Structure. 2007 May;15(5):553-64. PMID:17502101 doi:10.1016/j.str.2007.03.010

1 Structural highlights
2 Function
3 Evolutionary Conservation
4 Publication Abstract from PubMed
5 See Also
6 References

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/3i5g"

@@ Line 1: / Line 1: @@
 ==Crystal structure of rigor-like squid myosin S1==
-<StructureSection load='3i5g' size='340' side='right' caption='[[3i5g]], [[Resolution|resolution]] 2.60&Aring;' scene=''>
+<StructureSection load='3i5g' size='340' side='right'caption='[[3i5g]], [[Resolution|resolution]] 2.60&Aring;' scene=''>
 == Structural highlights ==
-<table><tr><td colspan='2'>[[3i5g]] is a 3 chain structure with sequence from [http://en.wikipedia.org/wiki/Loligo_pealei Loligo pealei] and [http://en.wikipedia.org/wiki/Todarodes_pacificus Todarodes pacificus]. This structure supersedes the now removed PDB entry [http://oca.weizmann.ac.il/oca-bin/send-pdb?obs=1&id=2ovk 2ovk]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3I5G OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3I5G FirstGlance]. <br>
+<table><tr><td colspan='2'>[[3i5g]] is a 3 chain structure with sequence from [http://en.wikipedia.org/wiki/Loligo_pealei Loligo pealei] and [http://en.wikipedia.org/wiki/Todarodes_pacificus Todarodes pacificus]. This structure supersedes the now removed PDB entry [http://oca.weizmann.ac.il/oca-bin/send-pdb?obs=1&id=2ovk 2ovk]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3I5G OCA]. For a <b>guided tour on the structure components</b> use [http://proteopedia.org/fgij/fg.htm?mol=3I5G FirstGlance]. <br>
-</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=CA:CALCIUM+ION'>CA</scene>, <scene name='pdbligand=MLI:MALONATE+ION'>MLI</scene></td></tr>
+</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=CA:CALCIUM+ION'>CA</scene>, <scene name='pdbligand=MLI:MALONATE+ION'>MLI</scene></td></tr>
 <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[2oy6|2oy6]], [[3i5f|3i5f]], [[3i5h|3i5h]], [[3i5i|3i5i]]</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=3i5g FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3i5g OCA], [http://pdbe.org/3i5g PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=3i5g RCSB], [http://www.ebi.ac.uk/pdbsum/3i5g PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=3i5g ProSAT]</span></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=3i5g FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3i5g OCA], [http://pdbe.org/3i5g PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=3i5g RCSB], [http://www.ebi.ac.uk/pdbsum/3i5g PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=3i5g ProSAT]</span></td></tr>
 </table>
 == Function ==
@@ Line 31: / Line 31: @@
 ==See Also==
-*[[Myosin|Myosin]]
+*[[Myosin 3D Structures|Myosin 3D Structures]]
 == References ==
 <references/>
 __TOC__
 </StructureSection>
+[[Category: Large Structures]]
 [[Category: Loligo pealei]]
 [[Category: Todarodes pacificus]]

3i5g

From Proteopedia

Revision as of 11:52, 23 September 2020

Crystal structure of rigor-like squid myosin S1

Structural highlights

Function

Evolutionary Conservation

Publication Abstract from PubMed

See Also

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

Views

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