The 7H11 monoclonal antibody specifically recognizes mouse CD370 which is also known as DNGR-1 (Dendritic cell natural killer lectin group receptor 1). CD370 is an ~27 kDa single-pass type II transmembrane glycoprotein that is encoded by Clec9A (C-type lectin domain family member 9A) which belongs to the C-type lectin superfamily. CD370 (Clec9a) is selectively expressed as a disulfide-linked homodimer on plasmacytoid dendritic cells and CD8+ myeloid dendritic cells. This receptor is comprised of an extracellular region that contains a C-type lectin domain with a single carbohydrate recognition domain (CRD), followed by a transmembrane segment and a cytoplasmic tail with an immunoreceptor tyrosine-based activation motif (ITAM). CD370 (Clec9a) acts as a damage-associated molecular pattern receptor, ie, an endocytic receptor for damage-associated molecular patterns (DAMPs) that are expressed by necrotic cells, eg, cells dying due to infection or transformation. This receptor binds by its extracellular domain to exposed F-actin-myosin complexes of dead cells. Intracellular signaling mediated through ligand-bound CD370 (Clec9a) leads to phosphorylation of Syk tyrosine kinase. Further downstream signaling can foster MHC Class I-mediated cross-presentation of dead-cell associated antigens by dendritic cells to CD8+ T cells.
This antibody is conjugated to BD Horizon™ BV605 which is part of the BD Horizon Brilliant™ Violet family of dyes. With an Ex Max of 407-nm and Em Max of 602-nm, BD Horizon BV605 can be excited by a violet laser and detected with a standard 610/20-nm filter set. BD Horizon BV605 is a tandem fluorochrome of BD Horizon BV421 and an acceptor dye with an Em max at 605-nm. Due to the excitation of the acceptor dye by the green (532 nm) and yellow-green (561 nm) lasers, there will be significant spillover into the PE and BD Horizon PE-CF594 detectors off the green or yellow-green lasers. BD Horizon BV605 conjugates are very bright, often exhibiting brightness equivalent to PE conjugates and can be used as a third color off of the violet laser.