R&D Systems' RANKL 蛋白介绍
RANKL:
更正:R&D RANKL蛋白氨基酸长度为182个,不是之前所说245个。
别名:“肿瘤坏死因子配体超家族成员11”(tumor necrosis factor ligand superfamily member 11,TNFSF11)、“肿瘤坏死因子相关诱导细胞因子”(TNF-related activation-induced cytokine,TRANCE)、“蚀骨细胞抑制因子配体”(osteoprotegerin ligand,OPGL)或蚀骨细胞分化因子(osteoclast
differentiation factor,ODF)。
结构:RANKL是肿瘤坏死因子(tumor necrosis
factor,TNF)超家族的一员,为破骨细胞抑制因子(osteoprotegerin)的配体,他是造骨细胞(osteoblast)膜上的一种膜蛋白,属于一种Ⅱ型跨膜蛋白。The human RANK Ligand cDNA encodes a type II transmembrane protein of 317 amino acids with a predicted cytoplasmic domain of 47 amino acids, a 21 amino acids transmembrane region, and an extracellular domain of 249 amino acids.
作用机理:
A.
成骨细胞及骨髓基质细胞表达的RANKL与破骨细胞前体细胞或破骨细胞表面上的RANK结合,RANK膜内区有3个结合位点,与TNFR相关因子(TNF receptor associate factors, TRAFs)中的RAF1、2、3、5及6结合后,可激活转录因子NF-kB和蛋白激酶JNK,从而促进破骨细胞的分化及骨吸收活性。
B.
OPG(骨保护素)作为一种诱骗受体,可以竞争性的与RANKL结合,从而封闭RANKL与破骨细胞表面的RANK结合,抑制破骨细胞的分化成熟。
C.
RANKL/RANK与RANKL/OPG在生物体内保持着一定的比率,如果比率失衡,就会引起各种骨疾病。RANKL/RANK与RANKL/OPG系统将骨代谢、免疫系统和内分泌系统紧密的联系起来,为骨质疏松、类风湿关节炎、骨肿瘤及肿瘤的骨转移等骨破坏性疾病的治疗开辟了新的途径。
RANKL作用:
A.
可以增强成熟蚀骨细胞的活力,阻止破骨细胞凋亡,RANKL过表达,可导致一系列骨疾病,如风湿性关节炎,银屑病性关节炎。实验发现,将TNFSF基因剔除掉的老鼠,会导致严重的骨质石化症(Osteopetrosis),且会缺乏蚀骨细胞
B.
免疫上,RANKL被视为是树突细胞的存活因子。RANKL可阻止树突细胞凋亡,促进T淋巴细胞增殖,且在淋巴细胞的早期发育和淋巴结的器官发育中发挥决定性的作用,这些作用可被OPG阻断。这些都提示OPG/RANK/RANKL系统可能是联系骨代谢与免疫系统之间的桥梁。
C.
RANKL也可能具有调节细胞凋亡的功能。RANKL还可以透过与“SRC激酶”(SRC kinase),以及“肿瘤坏死因子受体相关因子6”(tumor necrosis factor receptor-associated factor 6,TRAF6)形成信息复合物,以致活AKT/PKB等细胞凋亡抑制激酶。
应用:
A. 骨代谢方面,如骨质疏松症,风湿性关节炎等相关。
B. 免疫相关
C. 癌症
RANKL蛋白因子使用方法:
在使用货号为390-TN-010的RANKL蛋白诱导细胞分化时,培养基中需同时加入抗His-tag标签抗体:Mouse AntipolyHistidine Monoclonal Antibody (Catalog # MAB050)。只有此抗体存在时RANKL配体才能形成聚合体,进一步发挥功能
竞争分析:R&D VS
PEPROTECH
R&D
Recombinant Human RANCE/TNFSF11/RANK L
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DESCRIPTION |
CATALOG # |
SIZE |
Price |
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Recombinant Human TRANCE/RANK L/TNFSF11 |
10 µg |
4,150.00 |
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Recombinant Human TRANCE/RANK L/TNFSF11, CF |
390-TN-010/CF |
10 µg |
4,150.00 |
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Source:Mouse myeloma cell line, NS0-derived
Accession #:AAC51762
N-terminal Sequence Analysis:Met
Purity:>90%, by SDS-PAGE under reducing
conditions and visualized by silver stain.
Predicted Molecular Mass:23 kDa
SDS-PAGE:35 kDa, reducing conditions
Activity:Measured by its ability to induce
osteoclast differentiation of RAW 264.7 mouse monocyte/macrophage cells.The ED50 for this effect is typically 1.57.5 ng/mL in the presence of 2.5 µg/mL of a crosslinking antibody,
Protein Construct:
MHHHHHHHHHH |
GGGSGGGSGGGS |
IEGR |
Human
TRANCE |
N-terminus |
C-terminus |
AA Sequence:182aa
65 qhira ekamvdgswl dlakrsklea qpfahltina tdipsgshkv slsswyhdrg
121 wgkisnmtfs ngklivnqdg
fyylyanicf rhhetsgdla teylqlmvyv tktsikipss
181 htlmkggstk ywsgnsefhf
ysinvggffk lrsgeeisie vsnpslldpd qdatyfgafk
241 vrdid
Recombinant Human sRANK Ligand
Catalog Number: 310-01price:2340
20.0 kDa polypeptide comprising the TNF homologous region of RANKL (176 amino acid residues).
AA Sequence: 176aa
MEKAMVDGSW LDLAKRSKLE AQPFAHLTIN ATDIPSGSHK VSLSSWYHDR GWAKISNMTF SNGKLIVNQD GFYYLYANIC FRHHETSGDL ATEYLQLMVY VTKTSIKIPS SHTLMKGGST KYWSGNSEFH FYSINVGGFF KLRSGEEISI EVSNPSLLDP DQDATYFGAF KVRDID
Biological Activity:
Determined by its
ability to induce NFkappaB in RAW264.7 cells in the absence of any cross-linking. The expected ED50 for this effect is 10.0-25.0 ng/ml
R&D优势:
优势 |
ED50(3倍) |
His-Tag标签* |
R&D |
1.57.5 ng/mL |
含有His-Tag标签 |
Peprotech |
10.0-25.0
ng/ml |
无HHis-Tag标签 |
*RANKL与其受体RANK以六聚体的形式结合并将信号传递至NF-κB,若无His-Tag标签,RANKL不能聚合成聚合体的结构而发挥功能。
延伸:
许多激素和细胞因子参与调节RANKL的表达。IL-1、IL-17、1,25(OH)2D3、PTH、糖皮质激素和PGE2都可促进RANKL的表达,而TGF-B则抑制其表达。体外实验证实,RANKL和M-CSF可取代OB/ST诱导多能破骨祖细胞分化成熟。
Mouse AntipolyHistidine Monoclonal Antibody (Catalog # MAB050)
DESCRIPTION |
ANTIBODY |
CATALOG # |
SIZE |
PRICE |
His Tag MAb (Clone AD1.1.10), Mouse IgG1 |
AP, WB |
500 µg |