Skip to main content
PMC home page
Proceedings of the National Academy of Sciences of the United States of America logoLink to Proceedings of the National Academy of Sciences of the United States of America
. 1988 Jul;85(14):5026–5030. doi: 10.1073/pnas.85.14.5026

Purification of ras GTPase activating protein from bovine brain.

J B Gibbs 1, M D Schaber 1, W J Allard 1, I S Sigal 1, E M Scolnick 1
PMCID: PMC281680  PMID: 3293047

Abstract

In cytosolic extracts of bovine brain, we detected ras GTPase activating protein (GAP) activity that stimulated the GTP hydrolytic activity of normal c-Ha-ras p21 but not that of the oncogenic [Val12]p21 variant. GAP was purified 19,500-fold by a five-column procedure involving DEAE-Sephacel, Sepharose 6B, orange dye and green dye matrices, and Mono Q resins. A single major protein band of 125 kDa was observed on NaDodSO4/polyacrylamide gels that correlated with the elution of GAP activity on Mono Q. Purified GAP was devoid of inherent GTP hydrolytic activity, suggesting that it was a regulator of ras intrinsic GTPase activity. Under submaximal velocity conditions, the second-order rate constant of GTP hydrolysis at 24 degrees C for p21-GTP + GAP (4.5 X 10(6) M-1.sec-1) was at least 1000-fold greater than that for [Val12]p21-GTP + GAP (less than 3 X 10(3) M-1.sec-1).

Full text

PDF
5026

Images in this article

5028Image
on p.5028
5028Image
on p.5028

Selected References

These references are in PubMed. This may not be the complete list of references from this article.

  1. De Vendittis E., Vitelli A., Zahn R., Fasano O. Suppression of defective RAS1 and RAS2 functions in yeast by an adenylate cyclase activated by a single amino acid change. EMBO J. 1986 Dec 20;5(13):3657–3663. doi: 10.1002/j.1460-2075.1986.tb04696.x. [DOI] [PMC free article] [PubMed] [Google Scholar]
  2. Field J., Broek D., Kataoka T., Wigler M. Guanine nucleotide activation of, and competition between, RAS proteins from Saccharomyces cerevisiae. Mol Cell Biol. 1987 Jun;7(6):2128–2133. doi: 10.1128/mcb.7.6.2128. [DOI] [PMC free article] [PubMed] [Google Scholar]
  3. Furth M. E., Davis L. J., Fleurdelys B., Scolnick E. M. Monoclonal antibodies to the p21 products of the transforming gene of Harvey murine sarcoma virus and of the cellular ras gene family. J Virol. 1982 Jul;43(1):294–304. doi: 10.1128/jvi.43.1.294-304.1982. [DOI] [PMC free article] [PubMed] [Google Scholar]
  4. Gibbs J. B., Schaber M. D., Marshall M. S., Scolnick E. M., Sigal I. S. Identification of guanine nucleotides bound to ras-encoded proteins in growing yeast cells. J Biol Chem. 1987 Aug 5;262(22):10426–10429. [PubMed] [Google Scholar]
  5. Gibbs J. B., Sigal I. S., Poe M., Scolnick E. M. Intrinsic GTPase activity distinguishes normal and oncogenic ras p21 molecules. Proc Natl Acad Sci U S A. 1984 Sep;81(18):5704–5708. doi: 10.1073/pnas.81.18.5704. [DOI] [PMC free article] [PubMed] [Google Scholar]
  6. Gilman A. G. G proteins and dual control of adenylate cyclase. Cell. 1984 Mar;36(3):577–579. doi: 10.1016/0092-8674(84)90336-2. [DOI] [PubMed] [Google Scholar]
  7. Haubruck H., Disela C., Wagner P., Gallwitz D. The ras-related ypt protein is an ubiquitous eukaryotic protein: isolation and sequence analysis of mouse cDNA clones highly homologous to the yeast YPT1 gene. EMBO J. 1987 Dec 20;6(13):4049–4053. doi: 10.1002/j.1460-2075.1987.tb02750.x. [DOI] [PMC free article] [PubMed] [Google Scholar]
  8. Hughes S. M. Are guanine nucleotide binding proteins a distinct class of regulatory proteins? FEBS Lett. 1983 Nov 28;164(1):1–8. doi: 10.1016/0014-5793(83)80006-4. [DOI] [PubMed] [Google Scholar]
  9. Marshall M. S., Gibbs J. B., Scolnick E. M., Sigal I. S. Regulatory function of the Saccharomyces cerevisiae RAS C-terminus. Mol Cell Biol. 1987 Jul;7(7):2309–2315. doi: 10.1128/mcb.7.7.2309. [DOI] [PMC free article] [PubMed] [Google Scholar]
  10. Satoh T., Nakamura S., Kaziro Y. Induction of neurite formation in PC12 cells by microinjection of proto-oncogenic Ha-ras protein preincubated with guanosine-5'-O-(3-thiotriphosphate). Mol Cell Biol. 1987 Dec;7(12):4553–4556. doi: 10.1128/mcb.7.12.4553. [DOI] [PMC free article] [PubMed] [Google Scholar]
  11. Schaffner W., Weissmann C. A rapid, sensitive, and specific method for the determination of protein in dilute solution. Anal Biochem. 1973 Dec;56(2):502–514. doi: 10.1016/0003-2697(73)90217-0. [DOI] [PubMed] [Google Scholar]
  12. Seeburg P. H., Colby W. W., Capon D. J., Goeddel D. V., Levinson A. D. Biological properties of human c-Ha-ras1 genes mutated at codon 12. Nature. 1984 Nov 1;312(5989):71–75. doi: 10.1038/312071a0. [DOI] [PubMed] [Google Scholar]
  13. Sigal I. S., Smith G. M., Jurnak F., Marsico-Ahern J. D., D'Alonzo J. S., Scolnick E. M., Gibbs J. B. Molecular approaches towards an anti-ras drug. Anticancer Drug Des. 1987 Oct;2(2):107–115. [PubMed] [Google Scholar]
  14. Temeles G. L., Gibbs J. B., D'Alonzo J. S., Sigal I. S., Scolnick E. M. Yeast and mammalian ras proteins have conserved biochemical properties. Nature. 1985 Feb 21;313(6004):700–703. doi: 10.1038/313700a0. [DOI] [PubMed] [Google Scholar]
  15. Touchot N., Chardin P., Tavitian A. Four additional members of the ras gene superfamily isolated by an oligonucleotide strategy: molecular cloning of YPT-related cDNAs from a rat brain library. Proc Natl Acad Sci U S A. 1987 Dec;84(23):8210–8214. doi: 10.1073/pnas.84.23.8210. [DOI] [PMC free article] [PubMed] [Google Scholar]
  16. Trahey M., McCormick F. A cytoplasmic protein stimulates normal N-ras p21 GTPase, but does not affect oncogenic mutants. Science. 1987 Oct 23;238(4826):542–545. doi: 10.1126/science.2821624. [DOI] [PubMed] [Google Scholar]
  17. Wagner P., Molenaar C. M., Rauh A. J., Brökel R., Schmitt H. D., Gallwitz D. Biochemical properties of the ras-related YPT protein in yeast: a mutational analysis. EMBO J. 1987 Aug;6(8):2373–2379. doi: 10.1002/j.1460-2075.1987.tb02514.x. [DOI] [PMC free article] [PubMed] [Google Scholar]

Articles from Proceedings of the National Academy of Sciences of the United States of America are provided here courtesy of National Academy of Sciences

RESOURCES