Abstract
Nuclear spin relaxation monitored by heteronuclear NMR provides a useful method to probe the overall and internal molecular motion for biological macromolecules over a variety of time scales. Nitrogen-15 NMR relaxation parameters have been recorded for the N-terminal domain of the rat T-cell antigen CD2 (CD2d1) in a dilution series from 1.20 mM to 40 μM (pH 6.0, 25 °C). The data have been analysed within the framework of the model- free formalism of Lipari and Szabo to understand the molecular origin of severely enhanced transverse relaxation rates found for certain residues. These data revealed a strong dependence of the derived molecular correlation time τc upon the CD2d1 protein concentration. Moreover, a number of amide NH resonances exhibited exchange broadening and chemical shifts both strongly dependent on protein concentration. These amide groups cluster on the major β-sheet surface of CD2d1 that coincides with a major lattice contact in the X-ray structure of the intact ectodomain of rat CD2. The complete set of relaxation data fit well to an equilibrium monomer–dimer exchange model, yielding estimates of exchange rate constants (kON=5000 M-1 s-1; kOFF=7 s-1) and a dissociation constant (KD ∼ 3–6 mM) that is consistent with the difficulty in detecting the weak interactions for this molecule by alternative biophysical methods. The self-association of CD2d1 is essentially invariant to changes in buffer composition and ionic strength and the associated relaxation phenomena cannot be explained as a result of neglecting anisotropic rotational diffusion in the analysis. These observations highlight the necessity to consider low affinity protein self-association interactions as a source of residue specific exchange phenomena in NMR spectra of macromolecular biomolecules, before the assignment of more elaborate intramolecular conformational mechanisms.
Similar content being viewed by others
References
Akke, M. and Palmer, A.G. (1996) J. Am. Chem. Soc., 118, 911–912.
Akke, M., Liu, J., Cavanagh, J., Erickson, H.P. and Palmer, A.G. (1998) Nat. Struct. Biol., 5, 55–59.
Banci, L., Felli, I. and Koulougliotis, D. (1998) J. Biomol. NMR, 12, 307-318.
Barbato, G., Ikura, M., Kay, L. E., Pastor, R. W. and Bax, A. (1992) Biochemistry, 31, 5269–5278.
Bartels, C., **a, T.-H., Billeter, M., Güntert, P. and Wüthrich, K. (1995) J. Biomol. NMR, 6, 1–10.
Biekofsky, R.R., Martin, S.R., Browne, J.P., Bayley, P.M. and Feeney, J. (1998) Biochemistry, 37, 7617–7629.
Bodian, D.L., Jones, E.Y., Harlos, K., Stuart, D.I., and Davis, S.J. (1994) Structure, 2, 755–766.
Boucher, W. (1995) AZARA v1.0, Department of Biochemistry, University of Cambridge, U.K.
Brunger, A.T. (1993) XPLOR.v.31, Yale University, New Haven, CT.
Chen, H.A., Pfuhl, M., Davis, B. and Driscoll, P.C. (1998) J. Biomol. NMR, 12, 457–458.
Chen, H.A., Pfuhl, M., McAlister, M. S.B. and Driscoll, P.C. (1999) submitted.
Clore, G.M., Driscoll, P.C., Wingfield, P.T. and Gronenborn, A.M. (1990) Biochemistry, 29, 7387.
Clore, G.M., Szabo, A., Bax, A., Kay, L.E., Driscoll, P.C. and Gronenborn, A.M. (1990) J. Am. Chem. Soc., 112, 4989–4991.
Crawford, D.A. (1994) Structure and Dynamics of a Cell Adhesion Protein, Ph.D. Thesis, Oxford University, Oxford.
Davis, S.J., Ikemizu, S., Wild, M.K. and van der Merwe, P.A. (1998) Immunol. Rev., 163, 217–236.
Dayie, K.T., Wagner, G. and Lefèvre, J.F., In Dynamics and the Problem of Recognition in Biological Macromolecules, NatoASI Series A, Vol. 288, Plenum Press, New York, NY, pp. 139–162.
de la Torre, J.G. and Bloomfield, V.A. (1981) Q. Rev. Biophys., 14, 81–139.
de la Torre, J.G., Navarro, S., Martinez, M.C.L., Diaz, F.G. and Cascales, J.J.L. (1994) Biophys. J., 67, 530–531.
Delaglio, F., Gzesiek, S., Vuister, G.W., Zhu, G., Pfeifer, J. and Bax, A. (1995) J. Biomol. NMR, 6, 277–293.
Driscoll, P.C., Cyster, J.G., Campbell, I.D. and Williams, A.F. (1991) Nature, 353, 762–765.
Driscoll, P.C., Cyster, J.G., Somoza, C., Crawford, D.A., Howe, P., Harvey, T.S., Kieffer, B., Campbell, I.D. and Williams, A.F. (1993) Biochem. Soc. Trans., 21, 947–952.
Duan, Y., Wang, L. and Kollman, P.A. (1998) Proc. Natl. Acad. Sci. USA, 95, 9897–9902.
Evans, P.A., Kautz, R.A., Fox, R.O. and Dobson, C.M. (1989) Biochemistry, 28, 362–370.
Fushman, D., Cahill, S. and Cowburn, D. (1998) J. Mol. Biol., 266, 173–194.
Gryk, M.R., Abseher, R., Simon, B., Nilges, M. and Oschkinat, H. (1998) J. Mol. Biol., 280, 879–896.
Grzesiek, S., Bax, A., Hu, J.-S., Kaufman, J., Palmer, I., Stahl, S.J., Tjandra, N. and Wingfield, P. (1997) Protein Sci., 6, 1248–1261.
Jardetzky, O. (1996) Prog. Biophys. Mol. Biol., 65, 171–218.
Jones, E.Y., Davis, S.J., Williams, A.F., Harlos, K. and Stuart, D.I. (1992) Nature, 360, 232–239.
Kay, L.E. (1998) Nat. Struct. Biol., 5, 513–517.
Kay, L.E., Torchia, D.A. and Bax, A. (1989) Biochemistry, 28, 8972–8979.
Kay, L.E., Keifer, P. and Saarinen, T. (1992) J. Am. Chem. Soc., 114, 10663.
Kay, L.E., Nicholson, L.K., Delaglio, F., Bax, A. and Torchia, D.A. (1992) J. Magn. Reson., 97, 359–367.
Kieffer, B. and Driscoll, P.C. (1992) unpublished observations.
Kraulis, P.J. (1989) J. Magn. Reson., 24, 627–633.
Krishnan, V.V. and Cosman, M. (1998) J. Biomol. NMR, 12, 177–182.
Lane, A.N. and Lefèvre, J.-F. (1995) Methods Enzymol., 239, 596–619.
Le, H. and Oldfield, E. (1994) J. Biomol. NMR, 4, 341–348.
Le, H.B. and Oldfield, E. (1996) J. Phys. Chem., 100, 16423–16428
Lee, K., Rance, M., Chazin, W.J. and Palmer, A.G. (1997) J. Biomol. NMR, 9, 287–298.
Le Master, M. and Kushlan, D.M. (1996) J. Am. Chem. Soc., 118, 9255–9264.
Lipari, G. and Szabo, A. (1982a) J. Am. Chem. Soc., 104, 4546–4559.
Lipari, G. and Szabo, A. (1982b) J. Am. Chem. Soc., 104, 4559–4570.
Luz, Z. and Meiboom, S. (1963) J. Chem. Phys., 39, 366–370.
Mandel, A.M., Akke, M. and Palmer, A.G. (1995) J. Mol. Biol., 246, 144–163.
McAlister, M.S.B., Mott, H.R., van der Merwe, P.A., Campbell, I.D., Davis, S.J. and Driscoll, P.C. (1996) Biochemistry, 35, 5982–5991.
Mulder, F.A.A., de Graaf, R.A., Kaptein, R. and Boelens, R. (1998) J. Magn. Reson., 131, 351-357.
Otting, G., Liepinsh, E. and Wüthrich, K. (1993) Biochemistry, 32, 3571–3582.
Palmer, A.G., Cavanagh, J., Wright, P.E. and Rance, M. (1991) J. Magn. Reson., 93, 151–170.
Palmer, A.G., Williams, J. and McDermott, A. (1996) J. Phys. Chem., 100, 13293–13310.
Peng, J.W. and Wagner, G. (1992) J. Magn. Reson., 98, 308–332.
Silkowski, H., Davis, S.J., Barcley, A.N., Rowe, A.J., Harding, S.E. and Byron, O. (1997) Eur. Biophys. J., 25, 455–462.
States, D.J., Haberkorn, R.A. and Ruben, D.J. (1982) J. Magn. Reson., 48, 286–292.
Szyperski, T., Luginbühl, P., Otting, G. and Wüthrich, K. (1993) J. Biomol. NMR, 3, 151–164.
Tjandra, N., Feller, S.E., Pastor, R.W. and Bax, A. (1995) J. Am. Chem. Soc., 117, 12562–12566.
Tjandra, N., Wingfield, P., Stahl, S. and Bax, A. (1996) J. Biomol. NMR, 8, 273–284.
van der Merwe, P.A. (1993) personal communication.
Volkman, B.F., Alam, S.L., Satterlee, J.D. and Markley, J.L. (1998) Biochemistry, 37, 10906–10919.
Weber, G. (1992) Protein Interactions, Chapman and Hall, New York, NY.
Woessner, D.E. (1962) J. Chem. Phys., 37, 647–654.
Wolfram, S. (1998) Mathematica-A System for Doing Mathematics by Computer, 2.0 edition, Wolfram Research Inc., Champaign, IL.
Wong, K.-B., Fersht, A.R. and Freund, S.M.V. (1997) J. Mol. Biol., 258, 494–511.
Wyss, D.F., Dayie, K.T. and Wagner, G. (1997) Protein Sci., 6, 534–542.
Yang, D. and Kay, L.E. (1996) J. Mol. Biol., 263, 369–382.
Zhang, W.X., Smithgall, T.E. and Gmeiner, W.H. (1998) Biochemistry, 37, 7119–7126.
Zinn-Justin, S., Berthault, P., Guenneugues, M. and Desvaux, H. (1997) J. Biomol. NMR, 10, 363–372.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Pfuhl, M., Chen, H.A., Kristensen, S.M. et al. NMR exchange broadening arising from specific low affinity protein self-association: Analysis of nitrogen-15 nuclear relaxation for rat CD2 domain 1. J Biomol NMR 14, 307–320 (1999). https://doi.org/10.1023/A:1008319917267
Issue Date:
DOI: https://doi.org/10.1023/A:1008319917267