Cited by 69Protein Kinase Regulation and GTPase SignalingProtein Tyrosine PhosphatasesCellular transport and secretion

Differential Structural Requirements for Interaction of Ras Protein with Its Distinct Downstream Effectors

Open access
Akasaka, Kazuhito, Tamada, Masako, Wang, Feng, Kariya, Ken-ichi, Shima, Fumi, Kikuchi, Akira, Yamamoto, Masayuki, Shirouzu, Mikako +2 more·1996·Journal of Biological Chemistry

Abstract

Ras proteins have multiple effectors of distinct structures that do not share significant structural homology at their Ras interaction sites. To prove possible differences in their recognition mechanisms of Ras, we screened 44 human Ha-Ras proteins carrying mutations in the effector region and its flanking sequences for interaction with human Raf-1, Schizosaccharomyces pombe Byr2, and Saccharomyces cerevisiae adenylyl cyclase. The Ras binding specificities were largely shared between Raf-1 and Byr2 although Ras mutants, Y32F, T35S, and A59E, had their affinities for Byr2 selectively reduced. The only exception was Ras(D38N), which lost the ability to bind Raf-1 while retaining the activity to bind Byr2 and complement the Byr2- phenotype of S. pombe. On the other hand, adenylyl cyclase had quite distinct requirements for Ras residues; mutations P34G and T58A selectively abolished the ability to bind and activate it without considerably affecting the interaction with Raf-1 and Byr2. Y32F mutant, whereas losing the ability to activate Raf-1 and Byr2, could activate adenylyl cyclase efficiently. In addition, V45E mutation was found to impair the ability of Ras to activate both Raf-1 and adenylyl cyclase without significantly affecting the binding affinities for them. These results demonstrate that significant differences exist in the recognition mechanisms by which the three effector molecules associate with Ras and suggest that a region of Ras required for activation of the effectors in general may exist separately from that for binding the effectors.

Integrity signals

Registry

Crossref · 10.1074/jbc.271.10.5353

Cites

57 of 57 references verified0 citation errors · 0 not checkable

Statistics

Recomputing p-values needs the paper’s full text.

Claims the paper makes

We couldn’t retrieve this paper’s full text, so its claims and self-check weren’t run. The registry and citation checks still apply.

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

  • Activated RAS proteins can interact with many downstream effector proteins, such as RAF kinase, son of sevenless (SOS), phosphatidylinositol 3-kinase (PI3K) and Ral guanine nucleotide dissociation stimulating factors (RalGDS), which regulate cell events such as cell proliferation and apoptosis.

    “Activated RAS proteins can interact with many downstream effector proteins, such as RAF kinase, son of sevenless (SOS), phosphatidylinositol 3-kinase (PI3K) and Ral guanine nucleotide dissociation stimulating factors (RalGDS), which regulate cell events such as cell proliferation and apoptosis.323–325”

Cites

Flagged first, then by citations

Cited by

Sorted by citations

Authors
Akasaka, K., Tamada, M., Wang, F., Kariya, K.-I., Shima, F., Kikuchi, A., Yamamoto, M., Shirouzu, M., Yokoyama, S., & Kataoka, T.
Affiliations
  • Kobe University (JP)
  • Hiroshima University (JP)
  • The University of Tokyo (JP)
  • RIKEN (JP)
Corresponding author
Kataoka, Tohru
Venue
Journal of Biological Chemistry
Publisher
Elsevier BV
Published
1996-03
Volume
271
Issue
10
Pages
5353-5360
ISSN
0021-9258 (ISSN-L)
OpenAlex
W2083260280
Cited by
69
References
57
Citations by year
2025: 2 · 2023: 2 · 2019: 2 · 2018: 1 · 2016: 2 · 2014: 1 · 2013: 1 · 2012: 1
FWCI
3.41
Type
journal article
Language
en
Open access
Locations
  • Journal of Biological Chemistry (publishedVersion, cc-by)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Protein Kinase Regulation and GTPase Signaling
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Protein Tyrosine Phosphatases
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Cellular transport and secretion
Keywords
Ras proteins, Ras effectors, Raf-1, adenylate cyclase, RAS mutations
MeSH terms
Adenylyl Cyclases, Amino Acid Sequence, Antibodies, Monoclonal, Base Sequence, Binding Sites, Genetic Complementation Test, Humans, Kinetics, Molecular Sequence Data, Proto-Oncogene Proteins, Saccharomyces cerevisiae, Schizosaccharomyces, Structure-Activity Relationship, Polymerase Chain Reaction, Proto-Oncogene Proteins p21(ras), Mutagenesis, Site-Directed, Protein Serine-Threonine Kinases, Point Mutation, DNA Primers, ras Proteins, Proto-Oncogene Proteins c-raf

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review