Evidence map›Paper›PMID 10585849›Full record

ReviewThe Biochemical journal1999

Polyamine transport in bacteria and yeast.

K Igarashi, K Kashiwagi

Open access · greenAbstract readReview
In one paragraph

Review in The Biochemical journal, 1999. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 91 papers.

0numbers the graph read from it
0cells of the map it votes in
91citing papers in PubMed
2.2field-weighted citation impact, top 12% 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

91 citing papers in PubMed, 257 citations in OpenAlex.

  1. Review
  2. Review
  3. Quorum Sensing inMicroorganisms · 2025
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  8. Elucidating the Role ofMedical sciences (Basel, Switzerland) · 2022
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  9. Review
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  19. Proceedings of the National Academy of Sciences of the United States of America · 2019
    Article
  20. Article

31 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

2 authors at 1 institution in 1 country.

K IgarashiFaculty of Pharmaceutical Sciences, Chiba University, 1-33 Yayoi-cho, Inage-ku, Chiba 263-8522, Japan. iga16077@p.chiba-u.ac.jp
K Kashiwagi
Chiba University · JP

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

The polyamine content of cells is regulated by biosynthesis, degradation and transport. In Escherichia coli, the genes for three different polyamine transport systems have been cloned and characterized. Two uptake systems (putrescine-specific and spermidine-preferential) were ABC transporters, each consisting of a periplasmic substrate-binding protein, two transmembrane proteins and a membrane-associated ATPase. The crystal structures of the substrate-binding proteins (PotD and PotF) have been solved. They consist of two domains with an alternating beta-alpha-beta topology, similar to other periplasmic binding proteins. The polyamine-binding site is in a cleft between the two domains, as determined by crystallography and site-directed mutagenesis. Polyamines are mainly recognized by aspartic acid and glutamic acid residues, which interact with the NH(2)- (or NH-) groups, and by tryptophan and tyrosine residues that have hydrophobic interactions with the methylene groups of polyamines. The precursor of one of the substrate binding proteins, PotD, negatively regulates transcription of the operon for the spermidine-preferential uptake system, thus providing another level of regulation of cellular polyamines. The third transport system, catalysed by PotE, mediates both uptake and excretion of putrescine. Uptake of putrescine is dependent on membrane potential, whereas excretion involves an exchange reaction between putrescine and ornithine. In Saccharomyces cerevisiae, the gene for a polyamine transport protein (TPO1) was identified. The properties of this protein are similar to those of PotE, and TPO1 is located on the vacuolar membrane.

Indexed as

Escherichia coli ProteinsMembrane Transport ProteinsPeriplasmic Binding ProteinsAmino Acid SequenceAntiportersBacteriaBacterial ProteinsBiological TransportCarrier ProteinsMolecular Sequence DataPolyaminesProtein Structure, SecondaryPutrescineReceptors, Biogenic AmineSequence AlignmentSpermidineAntiportersBacterial ProteinsCarrier ProteinsEscherichia coli ProteinsMembrane Transport ProteinsPeriplasmic Binding ProteinsPolyaminesPotD protein, E coliPotE protein, E colipotF protein, E coliPutrescineReceptors, Biogenic AmineSpermidine

Identifiers

PMID10585849
PMCPMC1220684
OpenAlexW2023807790

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.