Cited by 111RNA Research and SplicingCancer-related Molecular PathwaysProtein Kinase Regulation and GTPase Signaling

A Role for Sam68 in Cell Cycle Progression Antagonized by a Spliced Variant within the KH Domain

Open access
Barlat, Isabelle, Maurier, Florence, Duchesne, Marc, Guitard, Estelle, Tocque, Bruno, Schweighoffer, Fabien·1997·Journal of Biological Chemistry

Abstract

Sam68 is the main tyrosine-phosphorylated and Src-associated protein in mitotic cells. Sam68 exhibits a conserved functional KH (hnRNPK homology) RNA binding domain and binds single strand nucleic acids. Tyrosine phosphorylation mediates the interaction of Sam68 with many SH3- and SH2-containing proteins and negatively regulates its nucleic acid binding properties. But the function and the impact of Sam68 on cell signaling and cell proliferation remains elusive. We report here the identification of a natural isoform of Sam68 with a deletion within the KH domain. This isoform, called Sam68DeltaKH, is specifically expressed at growth arrest upon confluency in normal cells. In cells that do not enter quiescence at confluency such as Src-transformed cells, no recruitment of Sam68DeltaKH is observed. Transfected Sam68DeltaKH inhibits serum-induced DNA synthesis and cyclin D1 expression. Sam68 overcomes these effects, suggesting that isoforms of Sam68 are involved, through KH domain signaling, in cell proliferation, and more precisely in G1/S transition.

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Integrity signals

Registry

Crossref · 10.1074/jbc.272.6.3129

Cites

22 of 22 references verified0 citation errors · 0 not checkable

Statistics

Claims the paper makes

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

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?

Self-check

Percentages, sums and reported differences re-computed from the paper’s own numbers.

The self-check needs the paper’s full text.

Cites

Flagged first, then by citations

Cited by

Sorted by citations

Authors
Barlat, I., Maurier, F., Duchesne, M., Guitard, E., Tocque, B., & Schweighoffer, F.
Corresponding author
Schweighoffer, Fabien
Venue
Journal of Biological Chemistry
Publisher
Elsevier BV
Published
1997-02
Volume
272
Issue
6
Pages
3129-3132
ISSN
0021-9258 (ISSN-L)
OpenAlex
W2026506733
Cited by
111
References
22
Citations by year
2024: 4 · 2023: 2 · 2021: 12 · 2019: 2 · 2018: 1 · 2016: 4 · 2015: 3 · 2013: 5 · 2012: 2
FWCI
2.73
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 › RNA Research and Splicing
  • Health Sciences › Medicine › Oncology › Cancer-related Molecular Pathways
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Protein Kinase Regulation and GTPase Signaling
Keywords
Sam68, KH domain, alternative splicing, protein isoforms, cell cycle progression, G1/S transition, cyclin D1, tyrosine phosphorylation, RNA binding, cell proliferation, quiescence, confluency, DNA synthesis
MeSH terms
Cell Cycle, DNA-Binding Proteins, Humans, Phosphoproteins, Phosphorylation, Structure-Activity Relationship, Transfection, Tyrosine, Polymerase Chain Reaction, S Phase, RNA-Binding Proteins, Adaptor Proteins, Signal Transducing

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