FNIP2 Antibody
- SPECIFICATION
- CITATIONS
- PROTOCOLS
- BACKGROUND
Application ![]()
| WB, E |
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Primary Accession | Q9P278 |
Other Accession | NP_065891, 154689769 |
Reactivity | Human, Mouse, Rat |
Host | Rabbit |
Clonality | Polyclonal |
Isotype | IgG |
Calculated MW | 122115 Da |
Application Notes | FNIP2 antibody can be used for detection of FNIP2 by Western blot at 1 - 2 µg/mL. |
Gene ID | 57600 |
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Target/Specificity | FNIP2; Multiple isoforms of FNIP2 are known to exist. This antibody is predicted to not cross-react with FNIP1. |
Reconstitution & Storage | FNIP2 antibody can be stored at 4℃ for three months and -20℃, stable for up to one year. As with all antibodies care should be taken to avoid repeated freeze thaw cycles. Antibodies should not be exposed to prolonged high temperatures. |
Precautions | FNIP2 Antibody is for research use only and not for use in diagnostic or therapeutic procedures. |
Name | FNIP2 {ECO:0000303|PubMed:18663353, ECO:0000312|HGNC:HGNC:29280} |
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Function | Binding partner of the GTPase-activating protein FLCN: involved in the cellular response to amino acid availability by regulating the non-canonical mTORC1 signaling cascade controlling the MiT/TFE factors TFEB and TFE3 (PubMed:18663353, PubMed:31672913, PubMed:36103527). Required to promote FLCN recruitment to lysosomes and interaction with Rag GTPases, leading to activation of the non- canonical mTORC1 signaling (By similarity). In low-amino acid conditions, component of the lysosomal folliculin complex (LFC) on the membrane of lysosomes, which inhibits the GTPase-activating activity of FLCN, thereby inactivating mTORC1 and promoting nuclear translocation of TFEB and TFE3 (PubMed:31672913, PubMed:36103527). Upon amino acid restimulation, disassembly of the LFC complex liberates the GTPase- activating activity of FLCN, leading to activation of mTORC1 and subsequent inactivation of TFEB and TFE3 (PubMed:31672913). Together with FLCN, regulates autophagy: following phosphorylation by ULK1, interacts with GABARAP and promotes autophagy (PubMed:25126726). In addition to its role in mTORC1 signaling, also acts as a co-chaperone of HSP90AA1/Hsp90: inhibits the ATPase activity of HSP90AA1/Hsp90, leading to activate both kinase and non-kinase client proteins of HSP90AA1/Hsp90 (PubMed:18403135). Acts as a scaffold to load client protein FLCN onto HSP90AA1/Hsp90 (PubMed:18403135). Competes with the activating co-chaperone AHSA1 for binding to HSP90AA1, thereby providing a reciprocal regulatory mechanism for chaperoning of client proteins (PubMed:18403135). May play a role in the signal transduction pathway of apoptosis induced by O6-methylguanine-mispaired lesions (By similarity). |
Cellular Location | Lysosome membrane. Cytoplasm. Note=Colocalizes with FLCN in the cytoplasm. |
Tissue Location | Widely expressed with highest levels in muscle, nasal mucosa, salivary gland, uvula, fat, liver, heart, placenta and pancreas (PubMed:18403135, PubMed:18663353, PubMed:27353360) Moderately expressed in the lung, small intestine, kidney and brain Lower levels detected in renal cell carcinoma than in normal kidney tissue (PubMed:18403135). Higher levels detected in oncocytoma tumors than in normal kidney. Higher levels detected in renal cell carcinoma tumors than in normal kidney tissue (PubMed:27353360) |

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Provided below are standard protocols that you may find useful for product applications.
Background
FNIP2 Antibody: FNIP2 is the second protein found to interact with folliculin, the product of the Birt-Hogg-Dube (BHD) gene. Folliculin is thought to act as a tumor suppressor as mutations or loss of heterozygosity in this gene are associated with BHD syndrome-related renal tumors. Folliculin and FNIP1, a protein that shares 49% identity to FNIP2, bind to AMPK, an important energy sensor in cells that negatively regulates the mammalian target of rapamycin (mTOR), a protein that is thought to be the master switch for cell growth and proliferation. FNIP1 and FNIP2 are able to form homo- and heteromeric multimers, suggesting these proteins may have a functional relationship.
References
Hasumi H, Baba M, Hong S-B, et al. Identification and characterization of a novel folliculin-interacting protein FNIP2. Gene2008; 415:60-7.
Takagi Y, Kobayashi T, Shiono M, et al. Interaction of folliculin (Birt-Hogg-Dube gene product) with novel Fnip1-like (FnipL/Fnip2) protein. Oncogene2008; 27:5339-47.
Vocke CD, Yang Y, Pavlovich CP, et al. High frequency of somatic frameshift BHD mutations in Birt-Hogg-Dube-associated renal tumors. J. Natl. Cancer Inst.2005; 97:931-5.
Baba M, Hong SB, Sharma M, et al. Folliculin encoded by the BHD gene interacts with a binding protein, FNIP1, and AMPK, and is involved in AMPK and mTOR signaling. Proc. Natl. Acad. Sci. USA2006; 103:15552-7.

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