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4byf

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Revision as of 11:57, 5 August 2016

Crystal structure of human Myosin 1c in complex with calmodulin in the pre-power stroke state

Structural highlights

4byf is a 4 chain structure with sequence from Human. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Ligands:	,
Activity:	Myosin ATPase, with EC number 3.6.4.1
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

[MYO1C_HUMAN] Myosins are actin-based motor molecules with ATPase activity. Unconventional myosins serve in intracellular movements. Their highly divergent tails are presumed to bind to membranous compartments, which would be moved relative to actin filaments. Involved in glucose transporter recycling in response to insulin by regulating movement of intracellular GLUT4-containing vesicles to the plasma membrane. Component of the hair cell's (the sensory cells of the inner ear) adaptation-motor complex. Acts as a mediator of adaptation of mechanoelectrical transduction in stereocilia of vestibular hair cells. Binds phosphoinositides and links the actin cytoskeleton to cellular membranes (By similarity). Isoform 3 is involved in regulation of transcription. Associated with transcriptional active ribosomal genes. Appears to cooperate with the WICH chromatin-remodeling complex to facilitate transcription. Necessary for the formation of the first phosphodiester bond during transcription initiation (By similarity).

Publication Abstract from PubMed

Myosin 1c plays a key role in supporting motile events that underlie cell migration, vesicle trafficking, insulin-stimulated glucose uptake and hearing. Here, we present the crystal structure of the human myosin 1c motor in complex with its light chain calmodulin. Our structure reveals tight interactions of the motor domain with calmodulin bound to the first IQ motif in the neck region. Several of the calmodulin residues contributing to this interaction are also involved in Ca2+-binding. Contact residues in the motor domain are linked to the central beta-sheet and the HO helix, suggesting a mechanism for communicating changes in Ca2+-binding in the neck region to the actin and nucleotide binding regions of the motor domain. The structural context and the chemical environment of myosin 1c mutations that are involved in sensorineural hearing loss in humans are described and their impact on motor function is discussed. We show that a construct consisting of the motor domain of myosin 1c and the first IQ motif is sufficient to establish a tight interaction with 14-3-3beta (KD =0.9muM) and present the model of a double-headed myosin 1c-14-3-3 complex. This complex has been implicated in the exocytosis of GLUT4 storage vesicles during insulin-stimulated glucose uptake.

Crystal Structure of Human Myosin 1c - The Motor in GLUT4 Exocytosis: Implications for Ca-Regulation and 14-3-3 Binding.,Stefan Munnich MH, Manstein DJ J Mol Biol. 2014 Mar 14. pii: S0022-2836(14)00128-4. doi:, 10.1016/j.jmb.2014.03.004. PMID:24636949^[1]

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

References

↑ Stefan Munnich MH, Manstein DJ. Crystal Structure of Human Myosin 1c - The Motor in GLUT4 Exocytosis: Implications for Ca-Regulation and 14-3-3 Binding. J Mol Biol. 2014 Mar 14. pii: S0022-2836(14)00128-4. doi:, 10.1016/j.jmb.2014.03.004. PMID:24636949 doi:http://dx.doi.org/10.1016/j.jmb.2014.03.004

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

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/4byf"

@@ Line 1: / Line 1: @@
 ==Crystal structure of human Myosin 1c in complex with calmodulin in the pre-power stroke state==
 <StructureSection load='4byf' size='340' side='right' caption='[[4byf]], [[Resolution|resolution]] 2.74&Aring;' scene=''>
@@ Line 5: / Line 6: @@
 </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=AOV:ADP+ORTHOVANADATE'>AOV</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'>[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='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=4byf FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4byf OCA], [http://www.rcsb.org/pdb/explore.do?structureId=4byf RCSB], [http://www.ebi.ac.uk/pdbsum/4byf PDBsum]</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=4byf FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4byf OCA], [http://pdbe.org/4byf PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=4byf RCSB], [http://www.ebi.ac.uk/pdbsum/4byf PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=4byf ProSAT]</span></td></tr>
 </table>
 == Function ==
@@ Line 17: / Line 18: @@
 From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
 </div>
+<div class="pdbe-citations 4byf" style="background-color:#fffaf0;"></div>
 ==See Also==
+*[[Calmodulin|Calmodulin]]
 *[[Myosin|Myosin]]
 == References ==

4byf

From Proteopedia

Revision as of 11:57, 5 August 2016

Crystal structure of human Myosin 1c in complex with calmodulin in the pre-power stroke state

Structural highlights

Function

Publication Abstract from PubMed

See Also

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

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