Abstract
Five spin labeled derivatives of a neurotoxin from cobra venom were analyzed by the earlier suggested method. The procedure was adjusted to the complex motional behaviour of the label. Each protein derivative carried covalently bound spin label on different lysine residues. In two derivatives, at positions Lys44 and Lys46, the labels were strongly mobile, whereas for other three derivatives modified at Lys15, Lys25 and Lys26 the label was less mobile with respect to the protein molecule, which made possible determination of the rotational correlation time of the protein molecule (2.8±0.3 ns). The rotational correlation time was in good agreement with the calculated value for the rigid sphere of the corresponding molecular weight. On the basis of the estimate of the anisotropic motion degree, it was found from the order parameter S that the label mobility increases in the following series of lysine residues: Lys26, Lys25, Lys15, Lys46, and Lys44. From the analysis of positions of outer wide peaks in ESR spectra obtained by varying temperature and viscosity of the medium, we determined the parameters for computer simulation. The theoretical and experimental spectra were found to be in good agreement.
Similar content being viewed by others
Abbreviations
- Τ :
-
rotational correlation time of the protein molecule
- Τ l :
-
rotational correlation time of the spin label
- 2A Z , 2A⊥:
-
the rigid limit distance between OWP and IWP, respectively, for ESR spectra of spin labeled proteins
- 2ā, 2ā⊥:
-
the averaged limit distance between the OWP and IWP correspondingly mobile spin label to respect of protein moiety with; Τ = ∞
- 2A∼',2A′⊥:
-
distance between OWP and IWP in the ESR spectra of spin labeled proteins for any T and η media
- SL:
-
spin label
- NT:
-
neurotoxin II from cobra venom
- NT-SL-Lys44:
-
neurotoxin spin labeled at Lys44 residue
- OWP:
-
outer wide peaks in the immobilized ESR spectra
- IWP:
-
inner wide peaks in the immobilized ESR spectra
- WL:
-
the residual linewidth
References
Berliner LJ (1976) Spin labelling. Theory and Application. Academic Press, New York
Cornell CN, Kaplan LJ (1978) Spin label studies of sulfhydryl environment in bovine plasma albumin 1. The NF transition and acid expansion. 2. The neutral transition and the A isomer. Biochemistry 9: 1750–1758
Defaye G, Basset, Monnier N, Chambaz EM (1980) ESR study of human transcortin thiol groups and site topography. Biochim Biophys Acta 623: 280–294
Dudich IV, Timofeev VP, Volkenstein MV, Misharin AYu (1977) Macromolecule rotational correlation time measurement by ESR method for covalently bound spin-label. Mol Biol (USSR) 9: 531–538
Griffith OH, McConnell HM (1966) A nitroxide-maleimide spin label. Proc Natl Acad Sci USA 55: 8–11
Hsia JC, Piette LH (1969) Spin-labeling as a method in studying antibody active site. Arch Biochem Biophys 129: 296–307
Hull HH, Chang R, Kaplan LJ (1975) On the location of the sulfhydryl group in bovine plasma albumin. Biochim Biophys Acta 400: 132–136
Inagaki F, Tamiya N, Miyasawa T (1980) Molecular conformation and function of erabutoxins as studied by nuclear magnetic resonance. Eur J Biochem 109: 129–138
Kimball MR, Sato A, Richardson JS, Rosen LS, Low BW (1979) Molecular conformation of erabutoxin b: atomic coordinates at 2.5 å resolution. Biochem Biophys Res Commun 88: 950–959
Kuznetzov AN (1976) A methods of spin probe. Nauka Moscow
Likhtenstein GI (1976) Methods in Molecular Biology. Wiley-Interscience, New York
McCalley RC, Shimshik EI, McConnell HM (1972) The effect of slow rotational motion on paramagnetic spectra. Chem Phys Lett 13: 115–119
Polnaszek CF (1975) Ph. D. Thesis, Cornell University
Surin AM, Utkin YuN, Pluzhnikov KA, Efremov ES, Tsetlin VI (1981) Fluorescence studies of neurotoxin II from the venom of cobra Naja naja oxiana and its derivatives: conformation of the fragment -Lys25 -Lys26-TRP27 -Trp28. Biorgan Khim (USSR) 7: 342–356
Timofeev VP, Dudich IV, Volkenstein MV (1980) Comparative study of dynamic structure of pig and chicken aspartate aminotransferases by measuring the rotational correlation time. Biophys Struct Mech 7: 41–49
Tsetlin VI, Karlsson E, Arseniev AS, Utkin YuN, Surin AM, Pashkov VS, Pluzhnikov KA, Ivanov VT, Bystrov VF, Ovchinnikov YuA (1979a) EPR and Fluorescence study of interaction of Naja naja oxiana neurotoxin II and its derivatives with acetylcholine receptor protein from Torpedo marmorata. FEBS Lett 106: 47–52
Tsetlin VI, Arseniev AS, Utkin YuN, Gurevich AZ, Senyavina LB, Bystrov VF, Ivanov VT, Ovchinnikov YuA (1979b) Conformational studies of neurotoxin II from Naja naja oxiana: selective N-acylation, circular dicroism and nuclear-magnetic-resonance study of acylation products. Eur J Biochem 94: 337–346
Wasserman AM, Aleksandrova TA, Dudich IV, Timofeev VP (1981) An investigation of the segmental flexibility of spin labeled synthetic macromolecules in solution. Eur Polymer J 17: 347–352
Whal P, Weber G (1967) Fluorescence depolarization of rabbit gamma globulin Conjungates. J Mol Biol 30: 371–382
Willian KJ, Marsh D, Sunderland CA, Sutton BJ, Wain-Hobson S, Dwek RA, Givol D (1977) Comparison of the dimensions of combining sites of the dinitrophenyl-binding immunoglobulin A myeloma proteins MOPC 315, MOPC 460 and XRPC 25 by spin-label mapping. Biochem J 165: 199–206
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Timofeev, V.P., Tsetlin, V.I. Analysis of mobility of protein side chains by spin label technique. Biophys. Struct. Mechanism 10, 93–108 (1983). https://doi.org/10.1007/BF00535545
Received:
Accepted:
Issue Date:
DOI: https://doi.org/10.1007/BF00535545