Jak Stat Pathway
Jak Stat Pathway - Related Videos
01:20
The JAK-STAT Signaling Pathway
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2023
Several cytokine receptors have tightly bound Janus kinase or JAK proteins attached at their cytosolic tail. Small signaling molecules such as cytokines, growth hormones, or prolactins bind to the cytokine receptors and initiate their dimerization. The dimerization brings the cytosolic JAKs together that trans-phosphorylate and activates each other. The activated JAKs now phosphorylate cytosolic tails of the cytokine receptors, which serve as binding sites for adaptor proteins such as SH2...
11:19
Merging Absolute and Relative Quantitative PCR Data to Quantify STAT3 Splice Variant Transcripts
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Cited by 2 •
2016
Tandem splicing events occur at sites less than 12 nucleotides apart. Quantifying ratios of such splice variants is feasible using an absolute quantitative PCR approach. This manuscript describes how splice variants of the gene STAT3, in which two splicing events results in Serine-701 inclusion/exclusion and α/β C-termini, can be quantified.
01:27
C4 Pathway and CAM
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2019
Most plants use the C3 pathway for carbon fixation. However, some plants, such as sugar cane, corn, and cacti that grow in hot conditions, use alternative pathways to fix carbon and conserve energy loss due to photorespiration. Photorespiration is the process that occurs when the oxygen concentration is high. Under such conditions, the rubisco enzyme in the Calvin cycle binds O2 instead of CO2, which halts photosynthesis and consumes energy. C4 Pathway The C4 pathway is used by plants such as...
08:42
Skeletal Phenotype Analysis of a Conditional Stat3 Deletion Mouse Model
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Cited by 4 •
2020
This protocol describes a canonical method to understand the critical genes controlling osteoclast activity in vivo. This method uses a transgenic mouse model and some canonical techniques to analyze skeletal phenotype.
01:24
Other Glycolytic Pathways
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2025
The pentose phosphate pathway (PPP) operates in parallel with glycolysis, facilitating the metabolism of both pentoses and glucose. This pathway consists of two distinct phases: the oxidative and non-oxidative phases. While it does not directly generate ATP, the intermediates formed during the process can integrate into glycolysis, contributing to cellular energy metabolism when required.Oxidative Phase: NADPH ProductionThe oxidative phase of the pentose phosphate pathway is primarily...
FAQs
Signal transmission proceeds through a phosphorylation relay. Ligand binding activates receptor-associated JAKs, which phosphorylate STAT proteins. These modified STATs form dimers, allowing them to enter the nucleus and regulate target genes. Because the pathway links receptor stimulation directly to transcriptional control, it can convert an extracellular signal into a relatively rapid cellular response.
STAT dimerization is the transition that enables activated STAT proteins to move from the signaling environment into the nucleus. Once there, the dimers regulate target-gene expression rather than merely transmitting a surface signal. This step connects phosphorylation by JAKs with biological outcomes such as immune activity, inflammation, cell growth, and differentiation.
Different extracellular cues can engage the same general signaling architecture while producing context-dependent changes in gene expression. Cytokine signals are particularly associated with immune and inflammatory responses, whereas growth-factor signals can influence growth and differentiation. The resulting transcriptional programs help explain how one pathway participates in multiple biological processes rather than producing one universal response.
JAK-STAT activity is closely connected with immune responses, inflammation, hematopoiesis, cell growth, and differentiation. In hematopoiesis, its relevance reflects the pathway’s role in cellular programs associated with blood formation. In biology research, examining these outputs helps investigators relate extracellular signaling to coordinated changes in cell behavior and tissue-level functions.
When JAK-STAT signaling becomes abnormal, the gene-regulatory responses controlled by the pathway can contribute to inflammatory, autoimmune, and malignant diseases. The disease relevance follows from its broad control of immune responses, inflammation, growth, and differentiation. Studying these abnormalities allows researchers to connect altered signaling activity with pathological cellular behavior and disease processes.
Pathway-directed inhibitors provide experimental tools for examining how JAK-STAT signaling contributes to cellular and disease-related outcomes. By targeting the pathway, researchers can investigate its role in inflammatory, autoimmune, or malignant processes and evaluate whether reducing pathway activity has useful effects. These studies also support the development of targeted therapies designed around abnormal signaling.