Recombinant Human LIFR protein (His tag C-Terminus)

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The leukemia inhibitory factor receptor also known as LIFR is a protein that plays an important role in cellular signaling. It has a mass of approximately 190-210 kDa and it is widely expressed in various tissues such as the liver muscle and bone. LIFR is a member of the interleukin 6 (IL-6) receptor family. The 'LIFR selector' refers to its ability to bind and select its specific ligand leukemia inhibitory factor (LIF) which initiates signal transduction processes. LIFR expression tends to be higher in developing tissues indicating its involvement during embryogenesis.

Biological function summary

The leukemia inhibitory factor receptor is involved in various cellular processes including differentiation proliferation and survival. When LIF binds to LIFR it forms a complex with gp130 another receptor protein which then activates downstream signaling pathways that regulate these cellular processes. This complex formation is an important component in the maintenance of stem cell pluripotency which is important in early development. The LIFR meaning in this context is essential for translating extracellular signals into cellular responses.

Pathways

The leukemia inhibitory factor receptor plays a critical role in the JAK/STAT signaling pathway. This pathway is significant for transmitting information received from extracellular chemical signals to the cell nucleus resulting in DNA transcription. LIFR closely interacts with other proteins like STAT3 and JAK1 which further propagate the signaling cascade initiated by LIF binding. Another pathway involving LIFR is the MAPK/ERK pathway a major pathway that influences cell growth and differentiation. These pathways highlight the interconnectivity of LIFR in regulating key cellular functions.

LIFR has been linked to cancer progression and osteoporosis. Abnormal LIFR signaling can lead to unchecked cellular proliferation contributing to tumorigenesis in various cancers such as liver and breast cancer. LIFR also interacts with proteins like gp130 and the aforementioned STAT3 in the cancerous context. In osteoporosis altered LIFR expression affects bone metabolism potentially leading to increased bone resorption and weakening. The role of LIFR in these diseases demonstrates its potential as a therapeutic target and its importance in maintaining normal tissue homeostasis.