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The Art of Vinculin Activation
The Art of Vinculin Activation
Published: 2009/12/07
Channel: Melissa Palma
vinculin_animation
vinculin_animation
Published: 2012/03/15
Channel: Walid Al-Akkad
Alpha-catenin, Vinculin
Alpha-catenin, Vinculin
Published: 2012/06/22
Channel: StructureForBiology
biosights: July 8, 2013 - Vinculin delivers a clutch performance
biosights: July 8, 2013 - Vinculin delivers a clutch performance
Published: 2013/07/16
Channel: Rockefeller University Press
Vinculin controls talin engagement with the actomyosin machinery
Vinculin controls talin engagement with the actomyosin machinery
Published: 2015/12/04
Channel: ScienceVio
vinculin tail movement
vinculin tail movement
Published: 2009/01/16
Channel: xeierschaukelnx
Focal adhesions  - Mary Beckerle (Utah)
Focal adhesions - Mary Beckerle (Utah)
Published: 2013/11/13
Channel: iBioEducation
Integrin protein structure and signaling
Integrin protein structure and signaling
Published: 2015/04/03
Channel: Shomu's Biology
The Microbial Hypothesis of IBS
The Microbial Hypothesis of IBS
Published: 2015/05/17
Channel: CommonwealthLabs
Focal Adhesion
Focal Adhesion
Published: 2013/01/17
Channel: Rachel Davidowitz
bioinformatics feat. vinculin tail (dnb mix)
bioinformatics feat. vinculin tail (dnb mix)
Published: 2009/01/17
Channel: xeierschaukelnx
Introduction to Integrins Part 1
Introduction to Integrins Part 1
Published: 2014/12/13
Channel: Ben Garside
biosights: March 19, 2012 - Vinculin minds the endothelial gap
biosights: March 19, 2012 - Vinculin minds the endothelial gap
Published: 2012/03/20
Channel: Rockefeller University Press
Medical vocabulary: What does Vinculin mean
Medical vocabulary: What does Vinculin mean
Published: 2016/01/19
Channel: botcaster inc. bot
Force Dependent Biotinylation of Myosin IIA by α-Catenin Tagged with a Promiscuous Biotin Ligase
Force Dependent Biotinylation of Myosin IIA by α-Catenin Tagged with a Promiscuous Biotin Ligase
Published: 2015/03/25
Channel: ScienceVio
Visualizing Membrane Binding of Talin in Atomic Detail
Visualizing Membrane Binding of Talin in Atomic Detail
Published: 2014/11/03
Channel: cellvideoabstracts
Gene Music using Protein Sequence of VCL "VINCULIN"
Gene Music using Protein Sequence of VCL "VINCULIN"
Published: 2017/07/02
Channel: Gene Music Studio
How to Pronounce Vinculin
How to Pronounce Vinculin
Published: 2015/06/03
Channel: Pronunciation Guide
Is SIBO an Autoimmune Condition or Triggered by One?
Is SIBO an Autoimmune Condition or Triggered by One?
Published: 2015/05/04
Channel: Angela Pifer Functional Medicine Nutritionist
Dynamic focal adhesions
Dynamic focal adhesions
Published: 2015/03/16
Channel: Journal of Clinical Investigation
Do you have SIBO? - CHTV 165
Do you have SIBO? - CHTV 165
Published: 2017/04/21
Channel: Dr. Dan Pompa
Dr  Mark Pimentel, MD Interview
Dr Mark Pimentel, MD Interview
Published: 2016/07/06
Channel: WOCA The Source Radio
Time lapse imaging of Actin and talin
Time lapse imaging of Actin and talin
Published: 2014/08/05
Channel: Thermo Fisher Scientific
New Lab Testing for IBS & SIBO - Dr. Jolene Brighten
New Lab Testing for IBS & SIBO - Dr. Jolene Brighten
Published: 2015/06/13
Channel: Dr. Jolene Brighten
Breakthrough Discovery Could Lead to Heart Failure Treatment
Breakthrough Discovery Could Lead to Heart Failure Treatment
Published: 2015/06/17
Channel: Wochit Science
Video of actin strand and vinulin made with SketchBio
Video of actin strand and vinulin made with SketchBio
Published: 2013/06/11
Channel: TheCISMM
VASP, zyxin and TES are tension-dependent members of Focal Adherens Junctions independent
VASP, zyxin and TES are tension-dependent members of Focal Adherens Junctions independent
Published: 2015/11/27
Channel: ScienceVio
Paxillin dynamics during focal adhesion formation
Paxillin dynamics during focal adhesion formation
Published: 2012/05/09
Channel: Mechanobiology Institute, Singapore
Focal adhesion dynamics in a migrating human cell
Focal adhesion dynamics in a migrating human cell
Published: 2015/08/29
Channel: David Sharp
TV3 - Presentació - La CCMA organitza un hackathon de 24 hores per  crear projectes que vinculin e
TV3 - Presentació - La CCMA organitza un hackathon de 24 hores per crear projectes que vinculin e
Published: 2014/02/28
Channel: TV3
Platelet actin nodules are podosome-like structures dependent on Wiskott–Aldrich syndrome protein...
Platelet actin nodules are podosome-like structures dependent on Wiskott–Aldrich syndrome protein...
Published: 2015/06/02
Channel: ScienceVio
Talin protein - 3D movie and a song, Rate My Science
Talin protein - 3D movie and a song, Rate My Science
Published: 2008/10/07
Channel: kosigrim
Dictyostelium discoideum - Ddα-catenin (movies2)
Dictyostelium discoideum - Ddα-catenin (movies2)
Published: 2011/03/17
Channel: Evoimpertinente
NIH: Crawling PtK1 Cell
NIH: Crawling PtK1 Cell
Published: 2013/08/29
Channel: NIH IRP (Intramural Research Program at the National Institutes of Health)
Phenotype of a palladin-depleted cell plated in 3D collagen matrix
Phenotype of a palladin-depleted cell plated in 3D collagen matrix
Published: 2015/01/20
Channel: The Company of Biologists
"Mafiosos, però generosos"
"Mafiosos, però generosos"
Published: 2012/12/04
Channel: ajcaldes
Mary Beckerle (University of Utah) Part 3: Focal Adhesions as Stress Sensors
Mary Beckerle (University of Utah) Part 3: Focal Adhesions as Stress Sensors
Published: 2010/04/01
Channel: iBiology
Paxillin and Focal Adhesion Kinase (FAK) Regulate Cardiac Contractility in the Zebrafish Heart
Paxillin and Focal Adhesion Kinase (FAK) Regulate Cardiac Contractility in the Zebrafish Heart
Published: 2016/03/09
Channel: ScienceVio
Sketchbio Features, October 2013
Sketchbio Features, October 2013
Published: 2013/10/21
Channel: TheCISMM
Focal adhesions form during lamellipodial protrusion and are essential for cell spreading
Focal adhesions form during lamellipodial protrusion and are essential for cell spreading
Published: 2011/12/22
Channel: Mechanobiology Institute, Singapore
Comparison of images acquired with TIRF-SIM and with conventional TIRF
Comparison of images acquired with TIRF-SIM and with conventional TIRF
Published: 2016/06/30
Channel: NikonInstrumentsComp
Formació municipalista de la Crida per Lleida
Formació municipalista de la Crida per Lleida
Published: 2015/06/11
Channel: Crida per Lleida
Paxillin-GFP movie
Paxillin-GFP movie
Published: 2010/07/27
Channel: CrawlingC3LL
Focal adhesions grow in response to force
Focal adhesions grow in response to force
Published: 2011/12/22
Channel: Mechanobiology Institute, Singapore
Comparison of images acquired with TIRF-SIM and with conventional TIRF
Comparison of images acquired with TIRF-SIM and with conventional TIRF
Published: 2016/06/30
Channel: NikonInstrumentsComp
Translocation of optoGEF-RhoA to mitochondria is followed by loss of focal adhesions.
Translocation of optoGEF-RhoA to mitochondria is followed by loss of focal adhesions.
Published: 2017/02/15
Channel: ICTD Lab IBEC
In vivo epidermal migration requires focal adhesion targeting of ACF7
In vivo epidermal migration requires focal adhesion targeting of ACF7
Published: 2016/05/24
Channel: ScienceVio
JCB : ZO-1 controls endothelial adherens junctions, cell–cell tension, angiogenesis, and barrier...
JCB : ZO-1 controls endothelial adherens junctions, cell–cell tension, angiogenesis, and barrier...
Published: 2015/03/10
Channel: ScienceVio
Espai Terra. Dimarts 24 de febrer
Espai Terra. Dimarts 24 de febrer
Published: 2015/02/24
Channel: TV3
Phenotype of a control cell plated in 3D collagen matrix
Phenotype of a control cell plated in 3D collagen matrix
Published: 2015/01/20
Channel: The Company of Biologists
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WIKIPEDIA ARTICLE

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VCL
Protein VCL PDB 1qkr.png
Available structures
PDB Ortholog search: PDBe RCSB
Identifiers
Aliases VCL, CMD1W, CMH15, HEL114, MV, Mvinculin
External IDs OMIM: 193065 MGI: 98927 HomoloGene: 7594 GeneCards: VCL
Gene location (Human)
Chromosome 10 (human)
Chr. Chromosome 10 (human)[1]
Chromosome 10 (human)
Genomic location for VCL
Genomic location for VCL
Band 10q22.2 Start 73,995,193 bp[1]
End 74,121,363 bp[1]
RNA expression pattern
PBB GE VCL 200930 s at fs.png

PBB GE VCL 200931 s at fs.png
More reference expression data
Orthologs
Species Human Mouse
Entrez
Ensembl
UniProt
RefSeq (mRNA)

NM_003373
NM_014000

NM_009502

RefSeq (protein)

NP_003364
NP_054706

NP_033528

Location (UCSC) Chr 10: 74 – 74.12 Mb Chr 10: 20.93 – 21.03 Mb
PubMed search [3] [4]
Wikidata
View/Edit Human View/Edit Mouse

In mammalian cells, vinculin is a membrane-cytoskeletal protein in focal adhesion plaques that is involved in linkage of integrin adhesion molecules to the actin cytoskeleton. Vinculin is a cytoskeletal protein associated with cell-cell and cell-matrix junctions, where it is thought to function as one of several interacting proteins involved in anchoring F-actin to the membrane.

Discovered independently by Benny Geiger[5] and Keith Burridge,[6] its sequence is 20%-30% similar to α-catenin, which serves a similar function.

Binding alternately to talin or α-actinin, vinculin's shape and, as a consequence, its binding properties are changed. The vinculin gene occurs as a single copy and what appears to be no close relative to take over functions in its absence. Its splice variant metavinculin (see below) also needs vinculin to heterodimerize and work in a dependent fashion.

Structure[edit]

Vinculin is a 117-kDa cytoskeletal protein with 1066 amino acids. The protein contains an acidic N-terminal domain and a basic C-terminal domain separated by a proline-rich middle segment. Vinculin consists of a globular head domain that contains binding sites for talin and α-actinin as well as a tyrosine phosphorylation site, while the tail region contains binding sites for F-actin, paxillin, and lipids.[7]

Essentially, there is an 835 amino acid N-terminal head, which is split into four domains. This is linked to the C-terminal tail with a linker region.

The recent discovery of the 3D structure sheds light on how this protein tailors its shape to perform a variety of functions. For example, vinculin is able to control the cell’s motility by simply altering its shape from active to inactive. When in its ‘inactive’ state, vinculin’s conformation is characterized by the interaction between its head and tail domains. And, when transforming to the ‘active’ form, such as when talin triggers binding, the intramolecular interaction between the tail and head is severed. In other words, when talin’s binding sites (VBS) of α-helices bind to a helical bundle structure in vinculin’s head domain, the ‘helical bundle conversion’ is initiated, which leads to the reorganization of the α-helices (α1- α-4), resulting in an entirely new five-helical bundle structure. This function also extends to cancer cells, and regulating their movement and proliferation of cancer to other parts of the body.

Mechanism and function[edit]

Cell spreading and movement occur through the process of binding of cell surface integrin receptors to extracellular matrix adhesion molecules. Vinculin is associated with focal adhesion and adherens junctions, which are complexes that nucleate actin filaments and crosslinkers between the external medium, plasma membrane, and actin cytoskeleton.[8] The complex at the focal adhesions consists of several proteins such as vinculin, α-actin, paxillin, and talin, at the intracellular face of the plasma membrane.

In more specific terms, the amino-terminus of vinculin binds to talin, which, in turn, binds to β-integrins, and the carboxy-terminus binds to actin, phospholipids, and paxillin-forming homodimers. The binding of vinculin to talin and actin is regulated by polyphosphoinositides and inhibited by acidic phospholipids. The complex then serves to anchor actin filaments to the membrane.[9]

The loss of vinculin impacts a variety of cell functions; it disrupts the formation of the complex, and prevents cell adhesion and spreading. The absence of the protein demonstrates a decrease in spreading of cells, accompanied by reduced stress fiber formation, formation of fewer focal adhesions, and inhibition of lamellipodia extension.[7] It was discovered that cells that are deficient in vinculin have growth cones that advance more slowly, as well as filopodia and lamellipoida that were less stable than the wild-type. Based on research, it has been postulated that the lack of vinculin may decrease cell adhesion by inhibiting focal adhesion assembly and preventing actin polymerization. On the other hand, overexpression of vinculin may restore adhesion and spreading by promoting recruitment of cytoskeletal proteins to the focal adhesion complex at the site of integrin binding.[9] Vinculin's ability to interact with integrins to the cytoskeleton at the focal adhesion appears to be critical for control of cytoskeletal mechanics, cell spreading, and lamellipodia formation. Thus, vinculin appears to play a key role in shape control based on its ability to modulate focal adhesion structure and function.

Activation[edit]

Vinculin is present in equilibrium between an active and inactive state. The active state is triggered upon binding to its designated partner. These changes occur when vinculin interacts with focal adhesion points to which it is binding to. When vinculin resides in its inactive form, the protein is kept designated to the cytoplasm unlike the focal adhesion points bound from the active state. The molecule talin is thought to be the major initiator of vinculin activation due to its presence in focal complexes. The combinatorial model of vinculin states that either α-actinin or talin can activate vinculin either alone or with the assistance of PIP2 or actin. This activation takes place by separation of the head-tail connection within inactive vinculin.[10]

Vinculin binding site[edit]

VBS
PDB 1rkc EBI.jpg
human vinculin head (1-258) in complex with talin's vinculin binding site 3 (residues 1944-1969)
Identifiers
Symbol VBS
Pfam PF08913
InterPro IPR015009

Vinculin binding sites are predominantly found in talin and talin-like molecules, enabling binding of vinculin to talin, stabilising integrin-mediated cell-matrix junctions. Talin, in turn, links integrins to the actin cytoskeleton. The consensus sequence for Vinculin binding sites is LxxAAxxVAxxVxxLIxxA, with a secondary structure prediction of four amphipathic helices. The hydrophobic residues that define the VBS are themselves 'masked' and are buried in the core of a series of helical bundles that make up the talin rod.[11]

Splice variants[edit]

Smooth muscles and skeletal muscles (and probably to a lower extent in cardiac muscle) in their well-differentiated (contractile) state co-express (along with vinculin) a splice variant carrying an extra exon in the 3' coding region, thus encoding a longer isoform meta-vinculin (meta VCL) of ~150KD molecular weight — a protein whose existence has been known since the 1980s.[12] Translation of the extra exon causes a 68- to 79-amino acid acid-rich insert between helices I and II within the C-terminal tail domain. Mutations within the insert region correlate with hereditary idiopathic dilated cardiomyopathy.[13]

The length of the insert in metavinculin is 68 AA in mammals and 79 in frog.[14] Compared metavinculin sequences from pig, man, chicken, and frog, and found the insert to be bipartite: the first part variable and the second highly conserved. Both vinculin isoforms co-localize in muscular adhesive structures, such as dense plaques in smooth muscles, intercalated discs in cardiomyocytes, and costameres in skeletal muscles.[15] Metavinculin tail domain has a lower affinity for the head as compared with the vinculin tail. In case of metavinculin, unfurling of the C-terminal hydrophobic hairpin loop of tail domain is impaired by the negative charges of the 68-amino acid insert, thus requiring phospholipid-activated regular isoform of vinculin to fully activate the metavinculin molecule.

Interactions[edit]

Vinculin has been shown to interact with:

In cases of Small Intestinal Bacterial Overgrowth presented as IBS symptoms, anti-cdtb antibodies have been identified to affect vinculin function, which is required in gut motility.[22]

References[edit]

  1. ^ a b c GRCh38: Ensembl release 89: ENSG00000035403 - Ensembl, May 2017
  2. ^ a b c GRCm38: Ensembl release 89: ENSMUSG00000021823 - Ensembl, May 2017
  3. ^ "Human PubMed Reference:". 
  4. ^ "Mouse PubMed Reference:". 
  5. ^ Geiger B (1979). "A 130K protein from chicken gizzard: its localization at the termini of microfilament bundles in cultured chicken cells". Cell. 18 (1): 193–205. doi:10.1016/0092-8674(79)90368-4. PMID 574428. 
  6. ^ Burridge K, Feramisco JR (1980). "Microinjection and localization of a 130K protein in living fibroblasts: a relationship to actin and fibronectin". Cell. 19 (3): 587–95. doi:10.1016/s0092-8674(80)80035-3. PMID 6988083. 
  7. ^ a b Goldmann WH, Ingber DE (2001). "Intact vinculin protein is Require for control of cell shape, cell mechanics, and rac-Dependent Lamellipodia Formation". Biochemical and Biophysical Research Communications. 290 (2): 749–755. doi:10.1006/bbrc.2001.6243. PMID 11785963. 
  8. ^ Xu W, Baribault H, Adamson ED (1998). "vinculin knockout results in heart and brain defects during embryonic development". Development. 125 (2): 327–337. PMID 9486805. 
  9. ^ a b Ezzell RM, Goldmann WH, Wang N, Parashurama N, Parasharama N, Ingber DE (1997). "Vinculin promotes cell spreading by mechanically coupling integrins to the cytoskeleton". Exp. Cell Res. 231 (1): 14–26. doi:10.1006/excr.1996.3451. PMID 9056408. 
  10. ^ Borgon RA, Vonrhein C, Bricogne G, Bois PR, Izard T (2004). "Crystal structure of human vinculin". Structure (London, England : 1993). 12 (7): 1189–97. doi:10.1016/j.str.2004.05.009. PMID 15242595. 
  11. ^ Gingras AR, Vogel KP, Steinhoff HJ, Ziegler WH, Patel B, Emsley J, Critchley DR, Roberts GC, Barsukov IL (February 2006). "Structural and dynamic characterization of a vinculin binding site in the talin rod". Biochemistry. 45 (6): 1805–17. doi:10.1021/bi052136l. PMID 16460027. 
  12. ^ Feramisco JR, Smart JE, Burridge K, Helfman DM, Thomas GP (1982). "Co-existence of vinculin and a vinculin-like protein of higher molecular weight in smooth muscle". J. Biol. Chem. 257 (18): 11024–31. PMID 6809764. 
  13. ^ Witt S, Zieseniss A, Fock U, Jockusch BM, Illenberger S (2004). "Comparative biochemical analysis suggests that vinculin and metavinculin cooperate in muscular adhesion sites". J. Biol. Chem. 279 (30): 31533–43. doi:10.1074/jbc.M314245200. PMID 15159399. 
  14. ^ Strasser P, Gimona M, Herzog M, Geiger B, Small JV (1993). "Variable and constant regions in the C-terminus of vinculin and metavinculin. Cloning and expression of fragments in E. coli". FEBS Lett. 317 (3): 189–94. doi:10.1016/0014-5793(93)81274-4. PMID 8425604. 
  15. ^ Belkin AM, Ornatsky OI, Glukhova MA, Koteliansky VE (1988). "Immunolocalization of meta-vinculin in human smooth and cardiac muscles". J. Cell Biol. 107 (2): 545–53. doi:10.1083/jcb.107.2.545. PMC 2115213Freely accessible. PMID 3138246. 
  16. ^ Hazan RB, Kang L, Roe S, Borgen PI, Rimm DL (December 1997). "Vinculin is associated with the E-cadherin adhesion complex". J. Biol. Chem. 272 (51): 32448–53. doi:10.1074/jbc.272.51.32448. PMID 9405455. 
  17. ^ Hazan RB, Norton L (April 1998). "The epidermal growth factor receptor modulates the interaction of E-cadherin with the actin cytoskeleton". J. Biol. Chem. 273 (15): 9078–84. doi:10.1074/jbc.273.15.9078. PMID 9535896. 
  18. ^ Turner CE, Brown MC, Perrotta JA, Riedy MC, Nikolopoulos SN, McDonald AR, Bagrodia S, Thomas S, Leventhal PS (May 1999). "Paxillin LD4 motif binds PAK and PIX through a novel 95-kD ankyrin repeat, ARF-GAP protein: A role in cytoskeletal remodeling". J. Cell Biol. 145 (4): 851–63. doi:10.1083/jcb.145.4.851. PMC 2133183Freely accessible. PMID 10330411. 
  19. ^ Mazaki Y, Hashimoto S, Sabe H (March 1997). "Monocyte cells and cancer cells express novel paxillin isoforms with different binding properties to focal adhesion proteins". J. Biol. Chem. 272 (11): 7437–44. doi:10.1074/jbc.272.11.7437. PMID 9054445. 
  20. ^ Brown MC, Perrotta JA, Turner CE (November 1996). "Identification of LIM3 as the principal determinant of paxillin focal adhesion localization and characterization of a novel motif on paxillin directing vinculin and focal adhesion kinase binding". J. Cell Biol. 135 (4): 1109–23. doi:10.1083/jcb.135.4.1109. PMC 2133378Freely accessible. PMID 8922390. 
  21. ^ Mandai K, Nakanishi H, Satoh A, Takahashi K, Satoh K, Nishioka H, Mizoguchi A, Takai Y (March 1999). "Ponsin/SH3P12: an l-afadin- and vinculin-binding protein localized at cell-cell and cell-matrix adherens junctions". J. Cell Biol. 144 (5): 1001–17. doi:10.1083/jcb.144.5.1001. PMC 2148189Freely accessible. PMID 10085297. 
  22. ^ Pimentel M, Morales W, Pokkunuri V, Brikos C, Kim SM, Kim SE, Triantafyllou K, Weitsman S, Marsh Z, Marsh E, Chua KS, Srinivasan S, Barlow GM, Chang C (May 2015). "Autoimmunity Links Vinculin to the Pathophysiology of Chronic Functional Bowel Changes Following Campylobacter jejuni Infection in a Rat Model". Digestive Diseases and Sciences. 60 (5): 1195–205. doi:10.1007/s10620-014-3435-5. PMID 25424202. 

Further reading[edit]

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