Rikard Blunck

Mécanismes moléculaires des protéines membranaires
Professeur titulaire
Faculté des arts et des sciences - Département de physique
Complexe des sciences, local B-4451
514 343-7960
Professeur accrédité
Faculté de médecine - Département de biochimie et médecine moléculaire
Professeur accrédité
Faculté de médecine - Département de pharmacologie et physiologie
514 343-7146 (Télécopieur)
514 343-6111, poste 3329

Expertise de recherche

  • Relations structure-fonction des canaux KV dépendants du voltage
  • Mesures en temps-résolu de spectroscopie de fluorescence de protéines membranaires, qui sont purifiées et reconstituées dans des systèmes membranaires synthétiques
  • Étude des protéines membranaire par des mesures de temps de vie de fluorescence
  • Étude des mécanismes moléculaires des toxines "formeuses de pores" par la spectroscopie de fluorescence

Biographie

  • Postdoc à l'Université de Californie - Los Angeles
  • Doctorat au Centre de recherche Borstel, Allemagne
  • MSc à l'Université Christian-Albrechts, Kiel, Allemagne

Affiliations de recherche UdeM

Pour en savoir plus

Prix et distinctions

Publications

  1. Chanda B, Asamoah OK, Blunck R, Roux B, Bezanilla F. Gating charge displacement in voltage-gated ion channels involves limited transmembrane movement. Nature. 2005 Aug 11;436(7052):852-6. PubMed PMID: 16094369.
  2. Chanda B, Blunck R, Faria LC, Schweizer FE, Mody I, Bezanilla F. A hybrid approach to measuring electrical activity in genetically specified neurons. Nat Neurosci. 2005 Nov;8(11):1619-26. Epub 2005 Oct 2. PubMed PMID: 16205716.
  3. Blunck R, Cordero-Morales JF, Cuello LG, Perozo E, Bezanilla F. Detection of the opening of the bundle crossing in KcsA with fluorescence lifetime spectroscopy reveals the existence of two gates for ion conduction. J Gen Physiol. 2006 Nov;128(5):569-81. Epub 2006 Oct 16. PubMed PMID: 17043150; PubMed Central PMCID: PMC2151582.
  4. Richardson J, Blunck R, Ge P, Selvin PR, Bezanilla F, Papazian DM, Correa AM. Distance measurements reveal a common topology of prokaryotic voltage-gated ion channels in the lipid bilayer. Proc Natl Acad Sci U S A. 2006 Oct 24;103(43):15865-70. Epub 2006 Oct 16. PubMed PMID: 17043236; PubMed Central PMCID: PMC1635094.
  5. Blunck R, McGuire H, Hyde HC, Bezanilla F. Fluorescence detection of the movement of single KcsA subunits reveals cooperativity. Proc Natl Acad Sci U S A. 2008 Dec 23;105(51):20263-8. doi: 10.1073/pnas.0807056106. Epub 2008 Dec 11. PubMed PMID: 19074286; PubMed Central PMCID: PMC2629256.
  6. Batulan Z, Haddad GA, Blunck R. An intersubunit interaction between S4-S5 linker and S6 is responsible for the slow off-gating component in Shaker K+ channels. J Biol Chem. 2010 Apr 30;285(18):14005-19. doi: 10.1074/jbc.M109.097717. Epub 2010 Mar 4. PubMed PMID: 20202932; PubMed Central PMCID: PMC2859562.
  7. Groulx N, Juteau M, Blunck R. Rapid topology probing using fluorescence spectroscopy in planar lipid bilayer: the pore-forming mechanism of the toxin Cry1Aa of Bacillus thuringiensis. J Gen Physiol. 2010 Nov;136(5):497-513. doi: 10.1085/jgp.200910347. PubMed PMID: 20974771; PubMed Central PMCID: PMC2964520.
  8. Haddad GA, Blunck R. Mode shift of the voltage sensors in Shaker K+ channels is caused by energetic coupling to the pore domain. J Gen Physiol. 2011 May;137(5):455-72. doi: 10.1085/jgp.201010573. PubMed PMID: 21518834; PubMed Central PMCID: PMC3082931.
  9. Wall-Lacelle S, Hossain MI, Sauvé R, Blunck R, Parent L. Double mutant cycle analysis identified a critical leucine residue in the IIS4S5 linker for the activation of the Ca(V)2.3 calcium channel. J Biol Chem. 2011 Aug 5;286(31):27197-205. doi: 10.1074/jbc.M111.237412. Epub 2011 Jun 7. PubMed PMID: 21652722; PubMed Central PMCID: PMC3149313.
  10. Kalstrup T, Blunck R. Dynamics of internal pore opening in K(V) channels probed by a fluorescent unnatural amino acid. Proc Natl Acad Sci U S A. 2013 May 14;110(20):8272-7. doi: 10.1073/pnas.1220398110. Epub 2013 Apr 29. PubMed PMID: 23630265; PubMed Central PMCID: PMC3657800.
  11. Faure É, Starek G, McGuire H, Bernèche S, Blunck R. A limited 4 Å radial displacement of the S4-S5 linker is sufficient for internal gate closing in Kv channels. J Biol Chem. 2012 Nov 16;287(47):40091-8. doi: 10.1074/jbc.M112.415497. Epub 2012 Sep 27. PubMed PMID: 23019337; PubMed Central PMCID: PMC3501078.
  12. Blunck R, Batulan Z. Mechanism of electromechanical coupling in voltage-gated potassium channels. Front Pharmacol. 2012;3:166. doi: 10.3389/fphar.2012.00166. eCollection 2012. PubMed PMID: 22988442; PubMed Central PMCID: PMC3439648.
  13. McGuire H, Aurousseau MR, Bowie D, Blunck R. Automating single subunit counting of membrane proteins in mammalian cells. J Biol Chem. 2012 Oct 19;287(43):35912-21. doi: 10.1074/jbc.M112.402057. Epub 2012 Aug 28. PubMed PMID: 22930752; PubMed Central PMCID: PMC3476259.
  14. Groulx N, McGuire H, Laprade R, Schwartz JL, Blunck R. Single molecule fluorescence study of the Bacillus thuringiensis toxin Cry1Aa reveals tetramerization. J Biol Chem. 2011 Dec 9;286(49):42274-82. doi: 10.1074/jbc.M111.296103. Epub 2011 Oct 17. PubMed PMID: 22006922; PubMed Central PMCID: PMC3234970.