Immunochemical evidence for a novel pertussis toxin substrate in human neutrophils

P. Gierschik, J. Falloon, C. Milligan, M. Pines, J. I. Gallin, Allen M. Spiegel

Research output: Contribution to journalArticle

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Abstract

Pertussis toxin catalyzes incorporation of 20.2 pmol of ADP-ribose/mg of protein into approximately 40-kDa protein(s) in human neutrophil membranes compared with 14.1 pmol/mg in bovine brain membranes. Based on these measurements we estimate that pertussis toxin substrate(s) should represent at least 0.085% of total membrane protein in neutrophils. Both brain and neutrophil membranes show high concentrations (0.34 versus 0.16% of total membrane protein, respectively) of the common β subunit of guanine nucleotide binding proteins. Affinity purified antibodies specific for G(o)-α fail to detect any protein in immunoblots of neutrophil membranes (150 μg) under conditions where as little as 10 ng of purified G(o)-α is detectable, and G(o)-α is readily detected in brain membranes (100 μg). An antiserum against transducin that cross-reacts strongly with G(i)-α, detects as little as 5 ng of purified G(i)-α and readily detects G(i)-α in brain membranes, but in neutrophil membranes, the antiserum detects an approximately 40-kDa band that corresponds to less than 10% of the expected amount of pertussis toxin substrate(s). The results show that human neutrophil membranes contain relatively large amounts of pertussis toxin substrate(s), but that the predominant pertussis toxin substrate is immunochemically distinct from previously identified substrates, transducin, G(i), and G(o).

Original languageEnglish (US)
Pages (from-to)8058-8062
Number of pages5
JournalJournal of Biological Chemistry
Volume261
Issue number17
StatePublished - 1986
Externally publishedYes

Fingerprint

Pertussis Toxin
Neutrophils
Membranes
Substrates
Brain
Transducin
Immune Sera
Membrane Proteins
Adenosine Diphosphate Ribose
Proteins
Antibody Affinity
Guanine Nucleotides
Carrier Proteins
Antibodies

ASJC Scopus subject areas

  • Biochemistry

Cite this

Gierschik, P., Falloon, J., Milligan, C., Pines, M., Gallin, J. I., & Spiegel, A. M. (1986). Immunochemical evidence for a novel pertussis toxin substrate in human neutrophils. Journal of Biological Chemistry, 261(17), 8058-8062.

Immunochemical evidence for a novel pertussis toxin substrate in human neutrophils. / Gierschik, P.; Falloon, J.; Milligan, C.; Pines, M.; Gallin, J. I.; Spiegel, Allen M.

In: Journal of Biological Chemistry, Vol. 261, No. 17, 1986, p. 8058-8062.

Research output: Contribution to journalArticle

Gierschik, P, Falloon, J, Milligan, C, Pines, M, Gallin, JI & Spiegel, AM 1986, 'Immunochemical evidence for a novel pertussis toxin substrate in human neutrophils', Journal of Biological Chemistry, vol. 261, no. 17, pp. 8058-8062.
Gierschik, P. ; Falloon, J. ; Milligan, C. ; Pines, M. ; Gallin, J. I. ; Spiegel, Allen M. / Immunochemical evidence for a novel pertussis toxin substrate in human neutrophils. In: Journal of Biological Chemistry. 1986 ; Vol. 261, No. 17. pp. 8058-8062.
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