|MX1 (D3W7I) Rabbit mAb 37849||20 µl||
|OAS1 (D1W3A) Rabbit mAb 14498||20 µl||
||H||40, 44||Rabbit IgG|
|RNase L (D4B4J) Rabbit mAb 27281||20 µl||
||H M||80||Rabbit IgG|
|IFITM3 (D8E8G) XP® Rabbit mAb 59212||20 µl||
|BST2 (D5V5Z) Rabbit mAb 19277||20 µl||
|TRIM5α (D6Z8L) Rabbit mAb 14326||20 µl||
||H Mk||56||Rabbit IgG|
|Phospho-eIF2α (Ser51) (D9G8) XP® Rabbit mAb 3398||20 µl||
||H M R Mk Dm||38||Rabbit IgG|
|Phospho-SAMHD1 (Thr592) (D7O2M) Rabbit mAb 89930||20 µl||
||H M R||72||Rabbit IgG|
|IFITM1 Antibody 13126||20 µl||
|Anti-rabbit IgG, HRP-linked Antibody 7074||100 µl||
Monoclonal antibodies are produced by immunizing animals with a synthetic peptide corresponding to residues surrounding Leu292 of human MX1 protein, Asp90 of human OAS1 protein, Pro717 of human RNase L protein, Val5 of human IFITM3 protein, Val134 of human BST2 protein, Pro395 of human TRIM5α protein, Ser51 of human eIF2α protein, and Thr592 of human SAMHD1 protein. Polyclonal antibodies are produced by immunizing animals with a synthetic peptide corresponding to residues surrounding Pro20 of human IFITM1 protein. Polyclonal antibodies are purified by protein A and peptide affinity chromatography.
Viral restriction factors are proteins produced by host cells that function, in part, to negatively impact various stages of viral life cycles in order to prevent propagation. MX1 (Myxovirus resistance protein 1/MxA) is an interferon-inducible antiviral protein that confers resistance to RNA viruses by blocking transcription of the viral genome (1,2).
2’-5’-oligoadenylate synthetase 1 (OAS1) is an antiviral protein induced by type 1 interferon that plays a key role in the cellular innate immune response (3). The OAS1 enzyme produces a second messenger, 2’-5’-linked oligoadenylate, which binds to RNase L, which then degrades viral and cellular RNA (4). Research studies indicate that the OAS1 system inhibits protein synthesis and induces apoptosis in virally infected cells, which limits viral infection (5).
Interferon-induced transmembrane protein (IFITM) family members, IFITM1 and IFITM3, appear to function as viral restriction factors by preventing fusion of viral and host membranes (6,7).
BST2 (CD317, Tetherin, HM1.24) is a type II transmembrane glycoprotein functioning as a major mediator of the innate immune defense against the dissemination of enveloped viruses by tethering viron on the cell surface, preventing viral release (8).
TRIM5α blocks viral infection by interacting with the incoming viral capsid and promoting its premature disassembly (9).
PKR-induced phosphorylation of the eukaryotic initiation factor 2 (eIF2) α subunit at Ser51 is a well-documented mechanism to downregulate protein synthesis upon viral infection (10).
SAM domain and HD domain-containing protein 1 (SAMHD1) prevents autoimmunity and HIV infection by hydrolyzing intracellular deoxynucleoside triphosphates (dNTPs), thereby limiting inappropriate immune activation by self nucleic acid and inhibiting reverse transcription of the HIV genome (11). Phosphorylation of SAMHD1 at Thr592 by cyclin A2/CDK1 was identified as a regulatory mechanism that controls SAMHD1 activity. SAMHD1 is phosphorylated in proliferating cells, which inhibits its ability to block HIV infection (12).
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