Cited by 364Protein Tyrosine PhosphatasesRegulation of Appetite and ObesityCytokine Signaling Pathways and Interactions

Divergent Roles of SHP-2 in ERK Activation by Leptin Receptors

Open access
Bjørbæk, Christian, Buchholz, Ryan M., Davis, Sarah M., Bates, Sarah H., Pierroz, Dominique D., Gu, Haihua, Neel, Benjamin G., Myers, Martin G. +1 more·2001·Journal of Biological Chemistry

Abstract

The protein tyrosine phosphatase SHP-2 has been proposed to serve as a regulator of leptin signaling, but its specific roles are not fully examined. To directly investigate the role of SHP-2, we employed dominant negative strategies in transfected cells. We show that a catalytically inactive mutant of SHP-2 blocks leptin-stimulated ERK phosphorylation by the long leptin receptor, ObRb. SHP-2, lacking two C-terminal tyrosine residues, partially inhibits ERK phosphorylation. We find similar effects of the SHP-2 mutants after examining stimulation of an ERK-dependent egr-1 promoter-construct by leptin. We also demonstrate ERK phosphorylation and egr-1 mRNA expression in the hypothalamus by leptin. Analysis of signaling by ObRb lacking intracellular tyrosine residues or by the short leptin receptor, ObRa, enabled us to conclude that two pathways are critical for ERK activation. One pathway does not require the intracellular domain of ObRb, whereas the other pathway requires tyrosine residue 985 of ObRb. The phosphatase activity of SHP-2 is required for both pathways, whereas activation of ERK via Tyr-985 of ObRb also requires tyrosine phosphorylation of SHP-2. SHP-2 is thus a positive regulator of ERK by leptin receptors, and both the adaptor function and the phosphatase activity of SHP-2 are critical for this regulation.

Integrity signals

Registry

Crossref · 10.1074/jbc.m007439200

Cites

63 of 63 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?

  • Phosphorylation of Tyr985 recruits SHP-2 to LepRb, leading to ERK pathway activation in cultured cells and recruitment of SOCS-3.

    “Phosphorylation of Tyr985 recruits SH2-domain-containing phosphatase-2 (SHP-2) to LepRb, leading to the activation of the extracellular signal regulated (ERK) signaling pathway in cultured cells, as well as the recruitment of suppressor of cytokine signaling-3 (SOCS-3), a negative regulator of LepRb signaling (6, 21, 22).”

Cites

Flagged first, then by citations

Research works printed but not linked: 1

  1. Li, 1994, Mol. Cell. Biol., 14, 509

Cited by

Sorted by citations

Authors
Bjørbæk, C., Buchholz, R. M., Davis, S. M., Bates, S. H., Pierroz, D. D., Gu, H., Neel, B. G., Myers, M. G., & Flier, J. S.
Affiliations
  • Beth Israel Deaconess Medical Center (US)
  • Joslin Diabetes Center (US)
Corresponding author
Flier, Jeffrey S.
Venue
Journal of Biological Chemistry
Publisher
Elsevier BV
Published
2001-02
Volume
276
Issue
7
Pages
4747-4755
ISSN
0021-9258 (ISSN-L)
OpenAlex
W2123126462
Cited by
364
References
63
Citations by year
2026: 3 · 2025: 4 · 2024: 5 · 2023: 5 · 2022: 4 · 2021: 9 · 2020: 10 · 2019: 5 · 2018: 12 · 2017: 14 · 2016: 9 · 2015: 12 · 2014: 25 · 2013: 17 · 2012: 19
FWCI
8.28
Type
journal article
Language
en
Open access
Locations
  • Journal of Biological Chemistry (publishedVersion, cc-by)
  • PubMed (publishedVersion)
Funders
  • National Cancer Institute (R01-CA-49152, F32CA072144, R01CA049152, CA72144)
  • National Institute of Diabetes and Digestive and Kidney Diseases (R01DK050693, DK-50693, DK-R37-28082, R37DK028082, R01-DK-56731, R01DK056731)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Protein Tyrosine Phosphatases
  • Life Sciences › Neuroscience › Endocrine and Autonomic Systems › Regulation of Appetite and Obesity
  • Health Sciences › Medicine › Oncology › Cytokine Signaling Pathways and Interactions
Keywords
SHP2, leptin receptor, ERK activation, Obras, protein tyrosine phosphatase, EGR1, leptin signaling, tyrosine phosphorylation, dominant-negative mutant, hypothalamus, receptor tyrosine kinase signaling
MeSH terms
Animals, Carrier Proteins, DNA-Binding Proteins, Cricetinae, Hypothalamus, Male, Mice, Inbred C57BL, Models, Biological, Mutation, Phosphorylation, Promoter Regions, Genetic, Protein-Tyrosine Kinases, Proto-Oncogene Proteins, Receptors, Cell Surface, RNA, Messenger, Transcription Factors, Transcription, Genetic, Transfection, Trans-Activators, CHO Cells, Protein Tyrosine Phosphatases, Immediate-Early Proteins, Leptin, Mitogen-Activated Protein Kinases, MAP Kinase Signaling System, Intracellular Signaling Peptides and Proteins, Mitogen-Activated Protein Kinase 3, STAT3 Transcription Factor, Mice, Early Growth Response Protein 1, Janus Kinase 2, Protein Tyrosine Phosphatase, Non-Receptor Type 6, Receptors, Leptin, Protein Tyrosine Phosphatase, Non-Receptor Type 11

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