Abstract
Adhesion of the serotype M1 Streptococcus pyogenes strain SF370 to human tonsil explants and cultured keratinocytes requires extended polymeric surface structures called pili. In this important human pathogen, pili are assembled from three protein subunits: Spy0125, Spy0128 and Spy0130 through the action of sortase enzymes. For this study, the structural properties of these pili proteins have been investigated in solution. Spy0125 and Spy0128 display characteristics of globular, folded proteins. Circular dichroism suggests a largely β-sheet composition for Spy0128 and Spy0125; Spy0130 appears to contain little secondary structure. Each of the proteins adopts a monodisperse, monomeric state in solution as assessed by analytical ultracentrifugation. Further, small-angle X-ray scattering curves for Spy0125, Spy0128 and Spy0130 suggest each protein adopts an elongated shape, likely comprised of two domains, with similar maximal dimensions. Based on the scattering data, dummy atom models of each of the pili subunits have been reconstructed ab initio. This study provides the first insights into the structure of Streptococcus pyogenes minor pili subunits, and possible implications for protein function are discussed.
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Abbot EL, Smith WD, Siou GP, Chiriboga C, Smith RJ, Wilson JA, Hirst BH, Kehoe MA (2007) Pili mediate specific adhesion of Streptococcus pyogesnes to human tonsil and skin. Cell Microbiol 9:1822–1833. doi:10.1111/j.1462-5822.2007.00918.x
Ackerman CJ, Harnett MM, Harnett W, Kelly SM, Svergun DI, Byron O (2003) 19 A solution structure of the filarial nematode immunomodulatory protein, ES-62. Biophys J 84:489–500. doi:10.1016/S0006-3495(03)74868-1
Bernadó P, Mylonas E, Petoukhov MV, Blackledge M, Svergun DI (2007) Structural characterization of flexible proteins using small-angle X-ray scattering. J Am Chem Soc 129:5656–5664. doi:10.1021/ja069124n
Boulin C, Kempf R, Koch MHJ, Mc Laughlin SM (1986) Data appraisal, evaluation and display for synchrotron radiation experiments: hardware and software. Nucl Instrum Methods A249:399–407
Brown PH, Schuck P (2006) Macromolecular size-and-shape distributions by sedimentation velocity analytical ultracentrifugation. Biophys J 90:4651–4661. doi:10.1529/biophysj.106.081372
Chalton DA, Musson JA, Flick-Smith H, Walker N, McGregor A, Lamb HK, Williamson ED, Miller J, Robinson JH, Lakey JH (2006) Immunogenicity of a Yersinia pestis vaccine antigen monomerized by circular permutation. Infect Immun 74:6624–6631. doi:10.1128/IAI.00437-06
Courtney HS, Hasty DL, Dale JB (2002) Molecular mechanisms of adhesion, colonization, and invasion of group A streptococci. Ann Med 34:77–87. doi:10.1080/07853890252953464
Demeler B, Saber H (1998) Determination of molecular parameters by fitting sedimentation data to finite element solution of the Lamm equation. Biophys J 74:444–454. doi:10.1016/S0006-3495(98)77802-6
Dramsi S, Caliot E, Bonne I, Guadagnini S, Prévost MC, Kojadinovic M, Lalioui L, Poyart C, Trieu-Cuot P (2006) Assembly and role of pili in group B streptococci. Mol Microbiol 60:1401–1413. doi:10.1111/j.1365-2958.2006.05190.x
Durchschlag H (1986) Specific volumes of biological macromolecules and some other molecules of biological interest. In: Hinz H-J (ed) Thermodynamic data for biochemistry and biotechnology. Springer, Berlin, pp 45–128
Edwards AM, Manetti AG, Falugi F, Zingaretti C, Capo S, Buccato S, Bensi G, Telford JL, Margarit I, Grandi G (2008) Scavenger receptor gp340 aggregates group A streptococci by binding pili. Mol Microbiol 68:1378–1394. doi:10.1111/j.1365-2958.2008.06220.x
Feigin LA, Svergun DI (1987) Structure analysis by small-angle X-ray and neutron scattering. Plenum Press, New York
de Garcia la Torre J, Huertas ML, Carrasco B (2000) Calculation of hydrodynamic properties of globular proteins from their atomic-level structure. Biophys J 78:719–730. doi:10.1016/S0006-3495(00)76630-6
Kang HJ, Coulibaly F, Clow F, Proft T, Baker EN (2007) Stabilizing isopeptide bonds revealed in Gram-positive bacterial pilus structure. Science 318:1625–1628. doi:10.1126/science.1145806
Kehoe MA (1994) Cell-wall-associated proteins in Gram-positive bacteria. In: Ghuysen JM, Hakenbeck R (eds) Bacterial cell wall. Elsevier, Amsterdam, pp 217–261
Koch MH, Vachette P, Svergun DI (2003) Small-angle scattering: a view on the properties, structures and structural changes of biological macromolecules in solution. Q Rev Biophys 36:147–227. doi:10.1017/S0033583503003871
Konarev PV, Volkov VV, Sokolova AV, Koch MHJ, Svergun DI (2003) PRIMUS—a Windows-PC based system for small-angle scattering data analysis. J Appl Cryst 36:1277–1282. doi:10.1107/S0021889803012779
Kozin MB, Svergun DI (2001) Automated matching of high- and low-resolution structural models. J Appl Cryst 34:33–41. doi:10.1107/S0021889800014126
Lamm O (1929) Die Differentialgleichung der Ultrazentrifugierung. Ark Mater Astron Fys 21B:1–4
Laue TM, Shah BD, Ridgeway TM, Pelletier S (1992) Computer-aided interpretation of analytical sedimentation data for proteins. In: Analytical ultracentrifugation in biochemistry and polymer science. Redwood Press Ltd, Melksham, pp 90–125
Lebowitz J, Lewis MS, Schuck P (2002) Modern analytical ultracentrifugation in protein science: a tutorial review. Protein Sci 11:2067–2079. doi:10.1110/ps.0207702
Longhi S, Receveur-Bréchot V, Karlin D, Johansson K, Darbon H, Bhella D, Yeo R, Finet S, Canard B (2003) The C-terminal domain of the measles virus nucleoprotein is intrinsically disordered and folds upon binding to the C-terminal moiety of the phosphoprotein. J Biol Chem 278:18638–18648. doi:10.1074/jbc.M300518200
Mandlik A, Das A, Ton-That H (2008a) The molecular switch that activates the cell wall anchoring step of pilus assembly in Gram-positive bacteria. Proc Natl Acad Sci USA 105:14147–14152. doi:10.1073/pnas.0806350105
Mandlik A, Swierczynski A, Das A, Ton-That H (2008b) Pili in Gram-positive bacteria: assembly, involvement in colonization and biofilm development. Trends Microbiol 16:33–40. doi:10.1016/j.tim.2007.10.010
Marraffini LA, Dedent AC, Schneewind O (2006) Sortases and the art of anchoring proteins to the envelopes of Gram-positive bacteria. Microbiol Mol Biol Rev 70:192–221. doi:10.1128/MMBR.70.1.192-221.2006
Perez J, Vachette P, Russo D, Desmadril M, Durand D (2001) Heat-induced unfolding of neocarzinostatin, a small all-beta protein investigated by small-angle X-ray scattering. J Mol Biol 308:721–743. doi:10.1006/jmbi.2001.4611
Petoukhov MV, Eady NA, Brown KA, Svergun DI (2002) Addition of missing loops and domains to protein models by x-ray solution scattering. Biophys J 83:3113–3125. doi:10.1016/S0006-3495(02)75315-0
Proft T, Baker EN (2008) Pili in Gram-negative and Gram-positive bacteria - structure, assembly and their role in disease. Cell Mol Life Sci. doi:10.1007/s00018-008-8477-4:-8
Race PR, Solovyova AS, Banfield MJ (2007) Conformation of the EPEC Tir protein in solution: investigating the impact of serine phosphorylation at positions 434/463. Biophys J 93:586–596. doi:10.1529/biophysj.106.101766
Receveur-Brechot V, Bourhis JM, Uversky VN, Canard B, Longhi S (2006) Assessing protein disorder and induced folding. Proteins 62:24–45. doi:10.1002/prot.20750
Romero P, Obradovic Z, Li X, Garner EC, Brown CJ, Dunker AK (2001) Sequence complexity of disordered protein. Proteins 42:38–48. doi:10.1002/1097-0134(20010101)42:1<38::AID-PROT50>3.0.CO;2-3
Schuck P (1998) Sedimentation analysis of noninteracting and self-associating solutes using numerical solutions to the Lamm equation. Biophys J 75:1503–1512. doi:10.1016/S0006-3495(98)74069-X
Schuck P (2003) On the analysis of protein self-association by sedimentation velocity analytical ultracentrifugation. Anal Biochem 320:104–124. doi:10.1016/S0003-2697(03)00289-6
Scott JR, Zähner D (2006) Pili with strong attachments: Gram-positive bacteria do it differently. Mol Microbiol 62:2320–2330. doi:10.1111/j.1365-2958.2006.05279.x
Semenyuk AV, Svergun DI (1991) GNOM—a program package for small-angle scattering data processing. J Appl Crystallog 24:537–540
Sreerama N, Woody RW (2003) Structural composition of betaI- and betaII-proteins. Protein Sci 12:384–388. doi:10.1110/ps.0235003
Svergun DI (1992) Determination of regularisation parameter in direct-transform methods using perceptual criteria. J Appl Cryst 25:495–503. doi:10.1107/S0021889892001663
Svergun DI (1999) Restoring low resolution structure of biological macromolecules from solution scattering using simulated annealing. Biophys J 76:2879–2886. doi:10.1016/S0006-3495(99)77443-6
Uversky VN (2002) Natively unfolded proteins: a point where biology waits for physics. Protein Sci 11:739–756. doi:10.1110/ps.4210102
Vachette P, Dainese E, Vasyliev VB, Di Muro P, Beltramini M, Svergun DI, De Filippis V, Salvato B (2002) A key structural role for active site type 3 copper ions in human ceruloplasmin. J Biol Chem 277:40823–40831. doi:10.1074/jbc.M207188200
Viguera AR, Martínez JC, Filimonov VV, Mateo PL, Serrano L (1994) Thermodynamic and kinetic analysis of the SH3 domain of spectrin shows a two-state folding transition. Biochemistry 33:2142–2150. doi:10.1021/bi00174a022
Volini M, Tobias P (1969) Circular dichroism studies of chymotrypsin and its derivatives. Correlation of changes in dichroic bands with deacylation. J Biol Chem 244:5105–5109
Volkov VV, Svergun DI (2003) Uniqueness of ab initio shape determination in small-angle scattering. J Appl Cryst 36:860–864. doi:10.1107/S0021889803000268
Wu H, Fives-Taylor PM (2001) Molecular strategies for fimbrial expression and assembly. Crit Rev Oral Biol Med 12:101–115. doi:10.1177/10454411010120020101
Acknowledgments
This work was supported, in part, by MRC project grant G0400849 (to MAK) and a Royal Society University Research Fellowship to Mark J. Banfield. Jonathan A. Pointon is supported by a studentship from the Medical Research Council (MRC), UK. Alexandra S. Solovyova and Mark J. Banfield are grateful to Newcastle University for funding. The authors thank the Daresbury-SRS (UK) and the EMBL-Hamburg Outstation (Germany) for the provision of beamtime and the expert assistance of beamline staff and software developers during data acquisition and data treatment [specifically Günter Grossmann (SRS), Dmitri Svergun and Peter Konarev (EMBL-DESY)].
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A. S. Solovyova, J. A. Pointon and P. R. Race have contributed equally to this work.
AUC&HYDRO 2008—Contributions from 17th International Symposium on Analytical Ultracentrifugation and Hydrodynamics, Newcastle, UK, 11–12 September 2008.
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Solovyova, A.S., Pointon, J.A., Race, P.R. et al. Solution structure of the major (Spy0128) and minor (Spy0125 and Spy0130) pili subunits from Streptococcus pyogenes . Eur Biophys J 39, 469–480 (2010). https://doi.org/10.1007/s00249-009-0432-2
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DOI: https://doi.org/10.1007/s00249-009-0432-2