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多次跨膜蛋白
多次跨膜蛋白是細胞生長、信號轉導及細胞間通訊的重要功能載體,廣泛參與機體的各項生理活動,同時也是藥物開發的重要靶點。然而,多次跨膜蛋白一直以來存在可溶重組形式的制備難題。愷佧生物擁有完善的VLP和Nanodisc技術平臺,實現了多次跨膜蛋白的可溶表達,不僅保持了多次跨膜蛋白正確的結構和構象,且具備優異的生物學活性,可助力多次跨膜蛋白的相關藥物研發。
VLP展示多次跨膜蛋白
VLP即Virus Like Particle,是由一種或多種病毒衣殼蛋白自動組裝形成的微小納米顆粒,具有很好的包封分子的能力。VLP展示多次跨膜蛋白是將多次跨膜蛋白展示在VLP表面,不僅維持了多次跨膜蛋白的正確構象,同時具備較強的免疫原性,在抗體發現中具有極大優勢。

VLP展示多次跨膜蛋白機理

愷佧生物成功開發出一系列VLP展示的多次跨膜蛋白產品,靶點涵蓋Claudin 18.2、GPRC5D、Claudin 6、CD20等多種靶點,突破了此類蛋白制備困難、可溶性低的技術壁壘,且具有更強的免疫原性,產品均經過嚴格的生物學活性驗證,可滿足客戶不同場景需求。同時,為了實現SPR等更多場景的開發應用,愷佧生物特別開發出定點生物素化的VLP超級蛋白產品,具有高靈敏度、高特異性及高穩定性特點,適合多種分析方法。
產品優勢:
全長序列表達,具備天然結構和構象
強免疫原性
可定點引入生物素化
全面的活性驗證
產品應用:
動物免疫
抗體淘選
體內藥效藥代研究
ELISA、SPR等各種分析檢測
數據示例
Fig. 1 Immobilized Human Claudin 18.2 VLP at 5 μg/ml (100 μl/Well). Dose response curve for Anti-Claudin 18.2 Antibody, hFc Tag with the EC50 of 9.8 ng/ml determined by ELISA.
Fig. 2 Biotinylated Human Claudin 18.2 VLP captured on CM5 Chip via Streptavidin can bind Anti-Claudin 18.2 Antibody with an affinity constant of 1.28 nM as determined in SPR assay.
Fig. 3 Immobilized Human Claudin 6 VLP at 5 μg/ml (100 μl/Well). Dose response curve for Anti-Claudin 6 Antibody, mFc Tag with the EC50 of 2.5 ng/ml determined by ELISA.
Fig. 4 Biotinylated Human Claudin 6 VLP captured on CM5 Chip via Streptavidin can bind Anti-Claudin 6 Antibody with an affinity constant of 0.65 nM as determined in SPR assay.
Nanodisc展示多次跨膜蛋白
多次跨膜蛋白的結構和功能與其所處的膜環境息息相關,多次跨膜蛋白研究的發展方向之一是開發能夠提供更好的細胞膜模擬效果的純化方法,Nanodisc展示技術應運而生。

Nanodisc展示多次跨膜蛋白示意圖

Nanodisc也稱納米圓盤,為一種由磷脂和膜支架分子組成的類膜結構,是用于研究膜蛋白結構和功能的重要工具。它通過模擬天然磷脂雙分子層膜環境,為膜蛋白提供了一個穩定的平臺,利用Nanodisc展示多次跨膜蛋白不僅可以更好地維持蛋白的天然構象,還可解決多次跨膜蛋白的可溶性制備問題,廣泛應用于藥物開發的各種分析檢測過程。
產品特點
正確的結構和構象
非去垢劑提取,性能更可靠
定量更精準
產品應用
抗體淘選
抗體篩選
檢測方法開發(ELISA/SPR/BLI等)
數據示例
愷佧生物開發的Nanodisc展示全長GPRC5D蛋白具有優異的生物學活性和較高的檢測靈敏度。
Fig. 5 Immobilized Human GPRC5D Nanodisc, His Tag at 2 μg/ml (100 μl/well) on the plate. Dose response curve for Anti-GPRC5D Antibody, hFc Tag with the EC50 of 4.9 ng/ml determined by
Fig. 6 Human GPRC5D Nanodisc, His Tag captured on CM5 Chip via anti-his antibody can bind Anti-GPRC5D Antibody with an affinity constant of 1.47 nM as determined in SPR assay.
為更大程度助益抗體藥物(如雙抗藥物)開發,愷佧生物特別提供生物素化的Nanodisc展示多次跨膜蛋白,在測評中表現出優異的結合活性,可靈活應用于ELISA方法開發及藥代動力學分析等不同研究階段。
Fig. 7 Immobilized Human CD3E&CD3D, His Tag at 2 μg/ml (100 μl/well) on the plate, add serial dilutions of Anti-Human CD3×GPRC5D Bispecific Antibody, hFc Tag and then add Biotinylated Human GPRC5D Nanodisc, His Tag at 5 μg/ml. Detection was performed using HRP-conjugated streptavidin with the EC50 of 0.28 μg/ml determined by ELISA.
Fig. 8 Loaded Biotinylated Human GPRC5D Nanodisc, His Tag on SA-Biosensor, can bind Anti-GPRC5D Antibody with an affinity constant of 1.16 nM as determined in BLI assay.
多次跨膜蛋白在抗體藥物PK分析中的應用
多次跨膜蛋白的靶向藥物開發是目前的熱門研究方向,在其抗體相關藥物的PK分析中,可運用多次跨膜蛋白對抗體進行親和捕獲,以分析抗體的濃度、活性等不同參數,比如在ADC藥物的LC-MS分析中,能分析總抗體和偶聯抗體的濃度及DAR等,進而反映藥物的藥效或毒性。

多次跨膜蛋白的PK分析應用舉例:ADC藥物的LC-MS分析原理

Fig. 9 Immobilized Human CD3E&CD3D at 5 μg/ml (100 μl/well) on the plate, add serial dilutions of Anti-Human CD3XGPRC5D bispecific antibody in 60% human serum and then add various dilution ratio of biotinylated human GPRC5D VLP. Detection was performed using HRP-conjugated streptavidin with the EC50 of 0.28 μg/ml determined by ELISA. The backcalculation bias is less than 20%, and the sensitivity of the method can reach 6.6 ng/ml.
Fig. 10 lmmobilized Human Claudin 6 VLP at 2 μg/ml (100 μl/well) on the plate. Add serial dilutions of Anti-Claudin 6 Antibody in 60% human serum. Detection was performed using HRP-conjugated goat anti-mouse antibody with the EC50 of 4.5 ng/ml determined by ELISA. The back calculation bias is less than 25%, and the sensitivity of the method can reach 0.7 ng/ml.
蛋白名稱 貨號 產品名稱 標簽 表達系統
A2AR A2R-HM0P108 Human A2AR VLP N/A HEK293 立即詢價
A2R-HM1N1 Human A2AR Nanodisc C-His HEK293 立即詢價
APLNR APL-HM0P112 Human APLNR VLP N/A HEK293 立即詢價
CB1 CNR-HM001 Human Cannabinoid receptor 1 VLP N/A HEK293 立即詢價
CCR2b CCR-HM02B Human CCR2b VLP N/A HEK293 立即詢價
CCR-HM02BB Biotinylated Human CCR2b VLP N/A HEK293 立即詢價
CCR4 CR4-HM1N122 Human CCR4 Nanodisc C-His HEK293 立即詢價
CCR6 CCR-HM16NB Biotinylated Human CCR6 Nanodisc C-His HEK293 立即詢價
CCR7 CCR-HM107 Human CCR7 Nanodisc C-His HEK293 立即詢價
CCR-HM17NB Biotinylated Human CCR7 Nanodisc C-His HEK293 立即詢價
CCR8 CCR-HM08V Human CCR8 VLP N/A HEK293 立即詢價
CR8-HM1N29 Human CCR8 Nanodisc C-His HEK293 立即詢價
CD133 CD33-HM0P110 Human CD133 VLP N/A HEK293 立即詢價
CD20 CD2-HM123 Human CD20/MS4A1 VLP N/A HEK293 立即詢價
CD2-HM123B Biotinylated Human CD20/MS4A1 VLP N/A HEK293 立即詢價
CD2-HM12NB Biotinylated Human CD20/MS4A1 Nanodisc C-His HEK293 立即詢價
Claudin 18.2 CLD-HM0P37 Human Claudin 18.2 VLP N/A HEK293 立即詢價
CLD-HE1822 Human Claudin 18.2 VLP N/A HEK293 立即詢價
CLD-HE1822B Biotinylated Human Claudin 18.2 VLP N/A HEK293 立即詢價
CLD-HM10NB Biotinylated Human Claudin 18.2 Nanodisc C-His HEK293 立即詢價
Claudin 3 CLD-HM13NB Biotinylated Human Claudin 3 Nanodisc C-His HEK293 立即詢價
Claudin 4 CLD-HM104 Human Claudin 4 VLP N/A HEK293 立即詢價
CLD4-HM1N161 Human Claudin 4 Nanodisc C-His HEK293 立即詢價
CLD-HM14NB Biotinylated Human Claudin 4 Nanodisc C-His HEK293 立即詢價
Claudin 6 CLD-HM006 Human Claudin 6 VLP N/A HEK293 立即詢價
CLD-HM006B Biotinylated Human Claudin 6 VLP N/A HEK293 立即詢價
CLD-CM006 Cynomolgus Claudin 6 VLP N/A HEK293 立即詢價
CLD-MM006 Mouse Claudin 6 VLP N/A HEK293 立即詢價
CLD-HM16NB Biotinylated Human Claudin 6 Nanodisc C-His HEK293 立即詢價
Claudin 9 CLD-HM009 Human Claudin 9 VLP N/A HEK293 立即詢價
CX3CR1 CXR-HM00V Human CX3CR1 VLP N/A HEK293 立即詢價
CXR-HM10NB Biotinylated Human CX3CR1 Nanodisc C-His HEK293 立即詢價
CXCR4 CXR-HM1RNB Biotinylated Human CXCR4 Nanodisc C-His HEK293 立即詢價
CXCR5 CXC-HM1R5 Human CXCR5 VLP N/A HEK293 立即詢價
CXR5-HM1N72 Human CXCR5 Nanodisc C-His HEK293 立即詢價
CXC-HM1RNB Biotinylated Human CXCR5 Nanodisc C-His HEK293 立即詢價
SLC7A11 XCT-HM10NB Biotinylated Human Cystine/glutamate transporter (SLC7A11) Nanodisc C-His HEK293 立即詢價
EDNRA EDA-HM0P111 Human EDNRA VLP N/A HEK293 立即詢價
GCGR GCR-HM00V Human GCGR/Glucagon receptor VLP N/A HEK293 立即詢價
GCR-HM10NB Biotinylated Human GCGR/Glucagon receptor Nanodisc C-His HEK293 立即詢價
GIPR GIP-HM14RNB Biotinylated Human GIPR Nanodisc C-His HEK293 立即詢價
GLP-1R GLP-HM1N123 Human GLP-1R Nanodisc C-His HEK293 立即詢價
GLP-HM10NB Biotinylated Human GLP-1R Nanodisc C-His HEK293 立即詢價
GPRC5D GPR-HM05P Human GPRC5D VLP N/A HEK293 立即詢價
GPR-HM05PB Biotinylated Human GPRC5D VLP N/A HEK293 立即詢價
GPR-CM05P Cynomolgus GPRC5D VLP N/A HEK293 立即詢價
GPR-MM05P Mouse GPRC5D VLP N/A HEK293 立即詢價
GPR-HM15P Human GPRC5D Nanodisc C-His HEK293 立即詢價
GPR-HM15NB Biotinylated Human GPRC5D Nanodisc C-His HEK293 立即詢價
LGR-4 LGR-HM10N Human LGR-4 Nanodisc C-His HEK293 立即詢價
LGR-5 LR5-HM1N157 Human LGR-5 Nanodisc C-His HEK293 立即詢價
LPAR1 LPA-HM0P111 Human LPAR1/LPA receptor 1 VLP N/A HEK293 立即詢價
MRGPRX2 MR2-HM00V Human MRGPRX2 VLP N/A HEK293 立即詢價
MR2-HM1N118 Human MRGPRX2 Nanodisc C-His HEK293 立即詢價
MR2-HM10XN Biotinylated Human MRGPRX2 Nanodisc C-His HEK293 立即詢價
Polycystin-2 PC2-HM10N Human PC2/Polycystin-2 Nanodisc C-His HEK293 立即詢價
PAR-1 PAR-HM01R Human Proteinase-activated receptor 1/PAR-1 VLP N/A HEK293 立即詢價
SSTR2 STR-HM002 Human SSTR2 VLP N/A HEK293 立即詢價
STEAP1 STP-HM01V Human STEAP1 VLP N/A HEK293 立即詢價
STP-HM00VB Biotinylated Human STEAP1 VLP N/A HEK293 立即詢價
TM4SF1 TSF-HM002 Human TM4SF1 VLP N/A HEK293 立即詢價
TSF-HM00N Human TM4SF1 Nanodisc N-His HEK293 立即詢價
TSHR THR-HM00V Human TSHR VLP N/A HEK293 立即詢價
Control VLP-HM00C VLP Control N/A HEK293 立即詢價
GPR-HM05CB Biotinylated VLP Control N/A HEK293 立即詢價
CON-HM1NB Biotinylated Nanodisc Control C-His HEK293 立即詢價