Evidence map›Paper›PMID 17179073›Full record

ArticleGenetics2007

Opposite effects of tor1 and tor2 on nitrogen starvation responses in fission yeast.

Ronit Weisman, Irina Roitburg, Miriam Schonbrun, Rona Harari, Martin Kupiec

Open access · bronzeAbstract readComparative Study
In one paragraph

Article in Genetics, 2007. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 75 papers.

0numbers the graph read from it
0cells of the map it votes in
75citing papers in PubMed
3.3field-weighted citation impact, top 8% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

75 citing papers in PubMed, 119 citations in OpenAlex.

  1. Article
  2. Functional analysis of target of rapamycin in regulating mycelial growth and development in Penicillium italicum.International microbiology : the official journal of the Spanish Society for Microbiology · 2026
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  3. TheCells · 2025
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15 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

5 authors at 1 institution in 1 country.

Ronit WeismanDepartment of Molecular Microbiology and Biotechnology, Faculty of Life Sciences, Tel Aviv University, Tel Aviv 69978, Israel. ronitt@post.tau.ac.il
Irina Roitburg
Miriam Schonbrun
Rona Harari
Martin Kupiec
Tel Aviv University · IL

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

The TOR protein kinases exhibit a conserved role in regulating cellular growth and proliferation. In the fission yeast two TOR homologs are present. tor1(+) is required for starvation and stress responses, while tor2(+) is essential. We report here that Tor2 depleted cells show a phenotype very similar to that of wild-type cells starved for nitrogen, including arrest at the G(1) phase of the cell cycle, induction of nitrogen-starvation-specific genes, and entrance into the sexual development pathway. The phenotype of tor2 mutants is in a striking contrast to the failure of tor1 mutants to initiate sexual development or arrest in G(1) under nitrogen starvation conditions. Tsc1 and Tsc2, the genes mutated in the human tuberous sclerosis complex syndrome, negatively regulate the mammalian TOR via inactivation of the GTPase Rheb. We analyzed the genetic relationship between the two TOR genes and the Schizosaccharomyces pombe orthologs of TSC1, TSC2, and Rheb. Our data suggest that like in higher eukaryotes, the Tsc1-2 complex negatively regulates Tor2. In contrast, the Tsc1-2 complex and Tor1 appear to work in parallel, both positively regulating amino acid uptake through the control of expression of amino acid permeases. Additionally, either Tsc1/2 or Tor1 are required for growth on a poor nitrogen source such as proline. Mutants lacking Tsc1 or Tsc2 are highly sensitive to rapamycin under poor nitrogen conditions, suggesting that the function of Tor1 under such conditions is sensitive to rapamycin. We discuss the complex genetic interactions between tor1(+), tor2(+), and tsc1/2(+) and the implications for rapamycin sensitivity in tsc1 or tsc2 mutants.

Indexed as

Gene Expression Regulation, FungalAmino Acid Transport SystemsBlotting, NorthernCell CycleDNA PrimersFlow CytometryLeucineNitrogenPhosphatidylinositol 3-KinasesProtein KinasesReproductionReverse Transcriptase Polymerase Chain ReactionSchizosaccharomycesSchizosaccharomyces pombe ProteinsSirolimusAmino Acid Transport SystemsDNA PrimersLeucineNitrogenPhosphatidylinositol 3-KinasesProtein KinasesSchizosaccharomyces pombe ProteinsSirolimusTor1 protein, S pombetor2 protein, S pombeTsc1 protein, S pombeTsc2 protein, S pombe

Identifiers

PMID17179073
PMCPMC1840069
OpenAlexW2171266002

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.