Overview

  • Product nameAnti-HERV antibody
    See all HERV primary antibodies
  • Description
    Rabbit polyclonal to HERV
  • Tested applicationsSuitable for: ICC/IF, WB, ELISAmore details
  • Species reactivity
    Reacts with: Human
  • Immunogen

    Synthetic peptide from the center region of human HERV conjugated to KLH

  • Positive control
    • 293 cell lysates, (nontransfected or transfected with the HERV gene). This antibody gave a positive result when used in the following methanol fixed cell lines: HepG2.

Properties

Applications

Our Abpromise guarantee covers the use of ab71115 in the following tested applications.

The application notes include recommended starting dilutions; optimal dilutions/concentrations should be determined by the end user.

Application Abreviews Notes
ICC/IF Use a concentration of 5 µg/ml.
WB 1/50 - 1/100. Detects a band of approximately 55 kDa (predicted molecular weight: 60 kDa).Can be blocked with HERV peptide (ab91514).
ELISA 1/1000.

Target

  • FunctionRetroviral envelope proteins mediate receptor recognition and membrane fusion during early infection. Endogenous envelope proteins may have kept, lost or modified their original function during evolution. This endogenous envelope protein has retained its original fusogenic properties and participates in trophoblast fusion during placenta morphogenesis.
    SU mediates receptor recognition. This interaction triggers the refolding of the transmembrane protein (TM) and is thought to activate its fusogenic potential by unmasking its fusion peptide (By similarity). Seems to recognize the type D mammalian retrovirus receptors SLC1A4 and SLC1A5, as it induces fusion of cells expressing these receptors in vitro.
    The transmembrane protein (TM) acts as a class I viral fusion protein. Under the current model, the protein has at least 3 conformational states: pre-fusion native state, pre-hairpin intermediate state, and post-fusion hairpin state. During viral and target cell membrane fusion, the coiled coil regions (heptad repeats) assume a trimer-of-hairpins structure, positioning the fusion peptide in close proximity to the C-terminal region of the ectodomain. The formation of this structure appears to drive apposition and subsequent fusion of membranes.
  • Tissue specificityExpressed at higher level in placental syncytiotrophoblast. Expressed at intermediate level in testis. Seems also to be found at low level in adrenal tissue, bone marrow, breast, colon, kidney, ovary, prostate, skin, spleen, thymus, thyroid, brain and trachea. Both mRNA and protein levels are significantly increased in the brain of individuals with multiple sclerosis, particularly in astrocytes and microglia.
  • Sequence similaritiesBelongs to the gamma type-C retroviral envelope protein family. HERV class-I W env subfamily.
  • Developmental stageIn placenta, detected at higher level during early pregnancy and at lower level during late pregnancy.
  • DomainThe cytoplasmic region is essential for the fusiogenic function.
    The 17 amino acids long immunosuppressive region is present in many retroviral envelope proteins. Synthetic peptides derived from this relatively conserved sequence inhibit immune function in vitro and in vivo.
  • Post-translational
    modifications
    Specific enzymatic cleavages in vivo yield mature proteins. Envelope glycoproteins are synthesized as a inactive precursor that is heavily N-glycosylated and processed likely by furin in the Golgi to yield the mature SU and TM proteins. The cleavage site between SU and TM requires the minimal sequence [KR]-X-[KR]-R. The intracytoplasmic tail cleavage by the viral protease that is required for the fusiogenic activity of some retroviruses envelope proteins seems to have been lost during evolution.
    The CXXC motif is highly conserved across a broad range of retroviral envelope proteins. It is thought to participate in the formation of a labile disulfide bond possibly with the CX6CC motif present in the transmembrane protein. Isomerization of the intersubunit disulfide bond to an SU intrachain disulfide bond is thought to occur upon receptor recognition in order to allow membrane fusion.
  • Cellular localizationCell membrane; Virion and Cell membrane. The surface protein is not anchored to the membrane, but localizes to the extracellular surface through its binding to TM.
  • Information by UniProt
  • Database links
  • Alternative names
    • Endogenous retrovirus group W member 1 antibody
    • env antibody
    • Env-W antibody
    • Envelope polyprotein gPr73 antibody
    • Enverin antibody
    • ENW1_HUMAN antibody
    • ERVW antibody
    • ERVW-1 antibody
    • Gp24 antibody
    • Gp50 antibody
    • HERV-7q Envelope protein antibody
    • HERV-W envelope protein antibody
    • HERVW antibody
    • SU antibody
    • Syncytin 1 antibody
    • Syncytin antibody
    • Syncytin-1 antibody
    • TM antibody
    • Transmembrane protein antibody
    see all

Anti-HERV antibody images

  • ab71115 stained HepG2 cells. The cells were 100% methanol fixed (5 min) and then incubated in 1%BSA / 10% normal goat serum / 0.3M glycine in 0.1% PBS-Tween for 1h to permeabilise the cells and block non-specific protein-protein interactions. The cells were then incubated with the antibody ab71115 at 5µg/ml overnight at +4°C. The secondary antibody (green) was DyLight® 488 goat anti- rabbit (ab96899) IgG (H+L) used at a 1/250 dilution for 1h. Alexa Fluor® 594 WGA was used to label plasma membranes (red) at a 1/200 dilution for 1h. DAPI was used to stain the cell nuclei (blue) at a concentration of 1.43µM.

  • All lanes : Anti-HERV antibody (ab71115) at 1/50 dilution

    Lane 1 : 293 cell lysates (nontransfected)
    Lane 2 : 293 cell lysates transiently transfected with the HERV gene

    Lysates/proteins at 2 µg per lane.


    Predicted band size : 60 kDa
    Observed band size : 55 kDa (why is the actual band size different from the predicted?)
    Additional bands at : 95 kDa. We are unsure as to the identity of these extra bands.

References for Anti-HERV antibody (ab71115)

ab71115 has not yet been referenced specifically in any publications.

Product Wall

Thank you for your inquiry.

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