1i84

From Proteopedia

(Difference between revisions)

Revision as of 10:57, 4 August 2021

CRYO-EM STRUCTURE OF THE HEAVY MEROMYOSIN SUBFRAGMENT OF CHICKEN GIZZARD SMOOTH MUSCLE MYOSIN WITH REGULATORY LIGHT CHAIN IN THE DEPHOSPHORYLATED STATE. ONLY C ALPHAS PROVIDED FOR REGULATORY LIGHT CHAIN. ONLY BACKBONE ATOMS PROVIDED FOR S2 FRAGMENT.

Structural highlights

1i84 is a 6 chain structure with sequence from Chick. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
NonStd Res:
Related:	2mys, 1br1
Activity:	Myosin ATPase, with EC number 3.6.4.1
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

[MYH11_CHICK] Muscle contraction.

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

Regulation of the actin-activated ATPase of smooth muscle myosin II is known to involve an interaction between the two heads that is controlled by phosphorylation of the regulatory light chain. However, the three-dimensional structure of this inactivated form has been unknown. We have used a lipid monolayer to obtain two-dimensional crystalline arrays of the unphosphorylated inactive form of smooth muscle heavy meromyosin suitable for structural studies by electron cryomicroscopy of unstained, frozen-hydrated specimens. The three-dimensional structure reveals an asymmetric interaction between the two myosin heads. The ATPase activity of one head is sterically "blocked" because part of its actin-binding interface is positioned onto the converter domain of the second head. ATPase activity of the second head, which can bind actin, appears to be inhibited through stabilization of converter domain movements needed to release phosphate and achieve strong actin binding. When the subfragment 2 domain of heavy meromyosin is oriented as it would be in an actomyosin filament lattice, the position of the heads is very different from that needed to bind actin, suggesting an additional contribution to ATPase inhibition in situ.

Three-dimensional image reconstruction of dephosphorylated smooth muscle heavy meromyosin reveals asymmetry in the interaction between myosin heads and placement of subfragment 2.,Wendt T, Taylor D, Trybus KM, Taylor K Proc Natl Acad Sci U S A. 2001 Apr 10;98(8):4361-6. Epub 2001 Apr 3. PMID:11287639^[1]

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

References

↑ Wendt T, Taylor D, Trybus KM, Taylor K. Three-dimensional image reconstruction of dephosphorylated smooth muscle heavy meromyosin reveals asymmetry in the interaction between myosin heads and placement of subfragment 2. Proc Natl Acad Sci U S A. 2001 Apr 10;98(8):4361-6. Epub 2001 Apr 3. PMID:11287639 doi:10.1073/pnas.071051098

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/1i84"

@@ Line 3: / Line 3: @@
 <StructureSection load='1i84' size='340' side='right'caption='[[1i84]], [[Resolution|resolution]] 20.00&Aring;' scene=''>
 == Structural highlights ==
-<table><tr><td colspan='2'>[[1i84]] is a 6 chain structure with sequence from [http://en.wikipedia.org/wiki/Chick Chick]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1I84 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1I84 FirstGlance]. <br>
+<table><tr><td colspan='2'>[[1i84]] is a 6 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=1I84 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1I84 FirstGlance]. <br>
 </td></tr><tr id='NonStdRes'><td class="sblockLbl"><b>[[Non-Standard_Residue|NonStd Res:]]</b></td><td class="sblockDat"><scene name='pdbligand=MLY:N-DIMETHYL-LYSINE'>MLY</scene></td></tr>
-<tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[2mys|2mys]], [[1br1|1br1]]</td></tr>
+<tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat"><div style='overflow: auto; max-height: 3em;'>[[2mys|2mys]], [[1br1|1br1]]</div></td></tr>
-<tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Myosin_ATPase Myosin ATPase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.6.4.1 3.6.4.1] </span></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>
-<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=1i84 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1i84 OCA], [http://pdbe.org/1i84 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1i84 RCSB], [http://www.ebi.ac.uk/pdbsum/1i84 PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=1i84 ProSAT]</span></td></tr>
+<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=1i84 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1i84 OCA], [https://pdbe.org/1i84 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1i84 RCSB], [https://www.ebi.ac.uk/pdbsum/1i84 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1i84 ProSAT]</span></td></tr>
 </table>
 == Function ==
-[[http://www.uniprot.org/uniprot/MYH11_CHICK MYH11_CHICK]] Muscle contraction.
+[[https://www.uniprot.org/uniprot/MYH11_CHICK MYH11_CHICK]] Muscle contraction.
 == Evolutionary Conservation ==
 [[Image:Consurf_key_small.gif|200px|right]]
@@ Line 32: / Line 32: @@
 ==See Also==
-*[[Myosin|Myosin]]
+*[[Myosin 3D Structures|Myosin 3D Structures]]
 == References ==
 <references/>

1i84

From Proteopedia

Revision as of 10:57, 4 August 2021

CRYO-EM STRUCTURE OF THE HEAVY MEROMYOSIN SUBFRAGMENT OF CHICKEN GIZZARD SMOOTH MUSCLE MYOSIN WITH REGULATORY LIGHT CHAIN IN THE DEPHOSPHORYLATED STATE. ONLY C ALPHAS PROVIDED FOR REGULATORY LIGHT CHAIN. ONLY BACKBONE ATOMS PROVIDED FOR S2 FRAGMENT.

Structural highlights

Function

Evolutionary Conservation

Publication Abstract from PubMed

See Also

References

Contents

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