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Mouse Anti-Leptin receptor/FITC Conjugated antibody
background:
Leptin receptor (OB-R) is a type I cytokine receptor family protein with significant amino acid sequence identity with gp130, G-CSF receptor, and LIF receptor. An OB-R transcript encodes a soluble form of the receptor. The transcript was reported to be expressed predominantly in regions of the hypothalamus previously thought to be important in body weight regulation. OB-R binds leptin with high affinity and is a potent leptin antagonist. Human OB-R encodes a 1 165 amino acid residue precursor protein with a 22 amino acid residue signal peptide, an 816 amino acid residue extracellular domain, a 21 amino acid residue transmembrane domain and a 303 amino acid residue cytoplasmic domain.
Function:
Receptor for obesity factor (leptin). On ligand binding, mediates signaling through JAK2/STAT3. Involved in the regulation of fat metabolism and, in a hematopoietic pathway, required for normal lymphopoiesis. May play a role in reproduction. Can also mediate the ERK/FOS signaling pathway
Subunit:
On leptin stimulation, homodimerizes. The phosphorylated receptor binds a number of SH2 domain-containing proteins such as STAT3, PTPN11, and SOCS3. Interaction with SOCS3 inhibits LRb signaling.
Subcellular Location:
Cell membrane; Single-pass type I membrane protein. Isoform E: Secreted (Probable).
Tissue Specificity:
Isoform A is expressed in fetal liver and in hematopoietic tissues and choroid plexus. In adults highest expression in heart, liver, small intestine, prostate and ovary. Low level in lung and kidney. Isoform B is highly expressed in hypothalamus.
Post-translational modifications:
On ligand binding, phosphorylated on two conserved SLCterminal tyrosine residues (isoform B only) by JAK2. Tyr-986 is required for complete binding and activation of PTPN11, ERK/FOS activation and, for interaction with SOCS3. Phosphorylation on Tyr-1141 is required for STAT3 binding/activation.
Similarity:
Belongs to the type I cytokine receptor family. Type 2 subfamily.
Contains 4 fibronectin type-III domains.
Contains 1 Ig-like (immunoglobulin-like) domain.
Database links:
Entrez Gene: 3953 Human
Entrez Gene: 16847 Mouse
Entrez Gene: 24536 Rat
Omim: 601007 Human
SwissProt: P48357 Human
SwissProt: P48356 Mouse
SwissProt: Q62959 Rat
Unigene: 23581 Human
Unigene: 723178 Human
Unigene: 259282 Mouse
Unigene: 9891 Rat
Important Note:
This product as supplied is intended for research use only, not for use in human, therapeutic or diagnostic applications.
Leptin是一种分子量为16kDa的脂肪组织源激素，由脂肪细胞分泌的，具有强亲水性，以单体形式存在于血浆中。 Leptin 具有广泛的生物学效应，作用于下丘脑，调节食欲、能量代谢及体重。Leptin 还可能作为脂肪-胰岛内分泌轴一部分，参与胰岛素分泌的调节。Leptin receptor (OB-R)是与gp130最密切相关的信号转导的共同成分,属1类细胞因子超家族，下丘脑有丰富的Leptin receptor，在其它部位也有分布，但水平较低，如：胰岛素B细胞、脉络丛、肝、肺、心、肾、睾丸、淋巴细胞和脂肪细胞中。人类存在四个异性体，均为单跨膜受体。其中OB-Rb在胞内结构域最长，是唯一能进行信号传导并调节热量摄入和能量消耗的异性体,分子量为132kDa。
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