Isothermal titration calorimetric study of the association of hen egg lysozyme and the anti-lysozyme antibody HyHEL-5.
Isothermal titration calorimetric study of the association of hen egg lysozyme and the anti-lysozyme antibody HyHEL-5.
复制标题
鸡蛋溶菌酶与抗溶菌酶抗体 HyHEL-5 关联的等温滴定量热研究。
DOI:
10.1021/bi00178a015
复制
发表时间:
1994
期刊:
影响因子:
2.9
通讯作者:
Willson,RC
中科院分区:
文献类型:
--
作者:
Hibbits,KA;Gill,DS;Willson,RC
Revised Manuscript Received January 18, 1994® abstract: The thermodynamics of association of hen egg lysozyme andthe antibody HyHEL-5 was characterized by isothermal titration calorimetry. The structure of this complex has been determined to 2.8-Á resolution by Sheriff et al.[Sheriff, S., Silverton, E. W., Padlan, E. A., Cohen, G. H., Smith-Gill, S. J., Finzel, B. C., & Davies, D. R.(1987) Proc. Natl. Acad. Sci. USA 84, 8075-8079], The calorimetric enthalpy of association is negative and declines linearly with temperature in therange 10-37 C (ACP=-340±40 cal mol™ 1 K™ 1). Entropic contributions calculated using previously determined values of the affinity of association are negative (unfavorable) in this temperature range. This result is consistent with the loss of mobility upon association of the unusually mobile segments of HEL which form the HyHEL-5 epitope. As the affinity of association is approximately constant in this temperature range, an enthalpy-entropy compensation effect is implied. The hydrophobic and vibrational contributions to AS and ACP are estimated using the method of Sturtevant [Sturtevant, J. M.(1977) Proc. Natl. Acad. Sci. USA 74, 2236-2240]. The experimental value of ACP is in rather close agreement with the ACP estimated from the polar and nonpolar surface areas buried upon association.Molecular recognition by proteins of the immunoglobulin family is at the heart of the immune system, and serves as the basis of therapeutic agents (Pastan & FitzGerald, 1991; Kim et al., 1993), purification methods (Bailón & Roy, 1990), and immunoassays. Immune recognition has long been an important focus of studies of molecular recognition and asso-ciation, Recent crystallographic studies of antibody/protein antigen complexes have opened the way to the application of molecular simulation and directed mutagenesis to the problem (Sheriff et al., 1987; Padlan et al., 1989; Bentley et al., 1990; Bhatetal., 1990; Fischmann et al., 1991; Tulip etal., 1992a, b; Chitarra et al., 1993; Prasad et al., 1993). As structures have become available, biophysical methods for characterization of intermolecular associationhave also advanced, particularly direct measurement of thermodynamic parameters by calo-
登录
查看更多内容
影响因子:
4.4
作者:
S. Smith‐Gill;T. Lavoie;C. Mainhart
通讯作者:
C. Mainhart
DOI:
10.1073/pnas.86.15.5938
发表时间:
1989-08-01
影响因子:
11.1
作者:
PADLAN, EA;SILVERTON, EW;DAVIES, DR
通讯作者:
DAVIES, DR
影响因子:
2.9
作者:
R. Varadarajan;P. Connelly;J. Sturtevant;F. Richards
通讯作者:
F. Richards
影响因子:
2.9
作者:
ARAKAWA, T;TIMASHEFF, SN
通讯作者:
TIMASHEFF, SN
影响因子:
4.8
作者:
S. Banerjee;A. Pogolotti;J. A. Rupley
通讯作者:
J. A. Rupley