Evidence map›Paper›PMID 9874780›Full record

ArticleProceedings of the National Academy of Sciences of the United States of America1999

Maturation of the tyrosine kinase c-src as a kinase and as a substrate depends on the molecular chaperone Hsp90.

Y Xu, M A Singer, S Lindquist

Abstract readComparative Study
In one paragraph

Article in Proceedings of the National Academy of Sciences of the United States of America, 1999. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 73 papers.

0numbers the graph read from it
0cells of the map it votes in
73citing papers in PubMed
3.5field-weighted citation impact, top 7% 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

73 citing papers in PubMed, 181 citations in OpenAlex.

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  13. The Mitochondrial Hsp90 TRAP1 and Alzheimer's Disease.Frontiers in molecular biosciences · 2021
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13 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

3 authors at 2 institutions in 1 country.

Y XuDepartment of Biochemistry and Molecular Biology, University of Chicago, Chicago, IL 60637, USA.
M A Singer
S Lindquist
Howard Hughes Medical Institute · USUniversity of Chicago · US

Funding

NIGMS NIH HHS GM-25843
6 · The paper itself

Abstract

Although Hsp90 displays general chaperone activity in vitro, few substrates of the chaperone have been identified in vivo, and the characteristics that render these substrates dependent on Hsp90 remain elusive. To investigate this issue, we exploited a paradoxical observation: several unrelated oncogenic viral tyrosine kinases, including v-src, attain their native conformation after association with Hsp90, yet their nearly identical cellular homologs interact only weakly with the chaperone. It has been controversial whether Hsp90 is vital for normal maturation of the cellular kinases or is simply binding a misfolded subfraction of the proteins. By modulating Hsp90 levels in Saccharomyces cerevisiae, we determined that Hsp90 is indeed necessary for the maturation of c-src (the normal homolog of v-src). c-src maturation is, however, less sensitive to Hsp90 perturbations than is v-src maturation. Dependence of the two proteins on Hsp90 does not correspond to their relative efficiency in reaching their final destination (the plasma membrane); we observed that in yeast, unlike in vertebrate cells, neither c-src nor v-src concentrate in the membrane. Expression of different v/c-src chimeras in cells carrying wild-type or temperature-sensitive Hsp90 alleles revealed that the difference between the proteins instead arises from multiple, naturally occurring mutations in the C-terminal region of v-src.

Indexed as

Aspartic AcidCell CompartmentationCell MembraneCSK Tyrosine-Protein KinaseEnzyme ActivationGlycineHSP90 Heat-Shock ProteinsMutationOncogene Protein pp60(v-src)Protein-Tyrosine KinasesProto-Oncogene Proteins pp60(c-src)Recombinant ProteinsSaccharomyces cerevisiaesrc-Family KinasesAspartic AcidCSK Tyrosine-Protein KinaseGlycineHSP90 Heat-Shock ProteinsOncogene Protein pp60(v-src)Protein-Tyrosine KinasesProto-Oncogene Proteins pp60(c-src)Recombinant Proteinssrc-Family Kinases

Identifiers

PMID9874780
PMCPMC15101
OpenAlexW2032157282

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.