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2bki

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Revision as of 07:13, 30 September 2015

Myosin VI nucleotide-free (MDinsert2-IQ) crystal structure

Structural highlights

2bki is a 3 chain structure with sequence from [1] and Chick. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Ligands:	,
Related:	2bkh, 1ahr
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum

Function

[MYO6_PIG] Myosins are actin-based motor molecules with ATPase activity. Unconventional myosins serve in intracellular movements. Myosin 6 is a reverse-direction motor protein that moves towards the minus-end of actin filaments. Has slow rate of actin-activated ADP release due to weak ATP binding. Functions in a variety of intracellular processes such as vesicular membrane trafficking and cell migration. Required for the structural integrity of the Golgi apparatus via the p53-dependent pro-survival pathway. Appears to be involved in a very early step of clathrin-mediated endocytosis in polarized epithelial cells. May act as a regulator of F-actin dynamics. May play a role in transporting DAB2 from the plasma membrane to specific cellular targets. Required for structural integrity of inner ear hair cells (By similarity).^[1]

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

Here we solve a 2.4-A structure of a truncated version of the reverse-direction myosin motor, myosin VI, that contains the motor domain and binding sites for two calmodulin molecules. The structure reveals only minor differences in the motor domain from that in plus-end directed myosins, with the exception of two unique inserts. The first is near the nucleotide-binding pocket and alters the rates of nucleotide association and dissociation. The second unique insert forms an integral part of the myosin VI converter domain along with a calmodulin bound to a novel target motif within the insert. This serves to redirect the effective 'lever arm' of myosin VI, which includes a second calmodulin bound to an 'IQ motif', towards the pointed (minus) end of the actin filament. This repositioning largely accounts for the reverse directionality of this class of myosin motors. We propose a model incorporating a kinesin-like uncoupling/docking mechanism to provide a full explanation of the movements of myosin VI.

The structure of the myosin VI motor reveals the mechanism of directionality reversal.,Menetrey J, Bahloul A, Wells AL, Yengo CM, Morris CA, Sweeney HL, Houdusse A Nature. 2005 Jun 9;435(7043):779-85. PMID:15944696^[2]

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

References

↑ Naccache SN, Hasson T. Myosin VI altered at threonine 406 stabilizes actin filaments in vivo. Cell Motil Cytoskeleton. 2006 Oct;63(10):633-45. PMID:16917816 doi:http://dx.doi.org/10.1002/cm.20150
↑ Menetrey J, Bahloul A, Wells AL, Yengo CM, Morris CA, Sweeney HL, Houdusse A. The structure of the myosin VI motor reveals the mechanism of directionality reversal. Nature. 2005 Jun 9;435(7043):779-85. PMID:15944696 doi:10.1038/nature03592

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/2bki"

@@ Line 1: / Line 1: @@
-==MYOSIN VI NUCLEOTIDE-FREE (MDINSERT2-IQ) CRYSTAL STRUCTURE==
+==Myosin VI nucleotide-free (MDinsert2-IQ) crystal structure==
 <StructureSection load='2bki' size='340' side='right' caption='[[2bki]], [[Resolution|resolution]] 2.90&Aring;' scene=''>
 == Structural highlights ==
-<table><tr><td colspan='2'>[[2bki]] is a 3 chain structure with sequence from [http://en.wikipedia.org/wiki/Chick Chick] and [http://en.wikipedia.org/wiki/Sus_scrofa Sus scrofa]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2BKI OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2BKI FirstGlance]. <br>
+<table><tr><td colspan='2'>[[2bki]] is a 3 chain structure with sequence from [http://en.wikipedia.org/wiki/ ] and [http://en.wikipedia.org/wiki/Chick Chick]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2BKI OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2BKI 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=SO4:SULFATE+ION'>SO4</scene></td></tr>
 <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[2bkh|2bkh]], [[1ahr|1ahr]]</td></tr>
@@ Line 37: / Line 37: @@
 </StructureSection>
 [[Category: Chick]]
-[[Category: Sus scrofa]]
 [[Category: Bahloul, A]]
 [[Category: Houdusse, A]]
@@ Line 48: / Line 47: @@
 [[Category: Iq motif]]
 [[Category: Motor protein-metal-binding protein complex]]
-[[Category: Motor protein/metal-binding protein]]
 [[Category: Muscle protein]]
 [[Category: Myosin vi]]

2bki

From Proteopedia

Revision as of 07:13, 30 September 2015

Myosin VI nucleotide-free (MDinsert2-IQ) crystal structure

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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