The application notes include recommended starting dilutions; optimal dilutions/concentrations should be determined by the end user.
Use a concentration of 1 - 4 µg/ml. Fixation/Permeabilization: PFA/Triton X-100
1/200 - 1/500. Perform heat mediated antigen retrieval with citrate buffer pH 6 before commencing with IHC staining protocol.
Use at an assay dependent concentration. Predicted molecular weight: 145 kDa.
FunctionCooperates with PPP2CA to protect centromeric cohesin from separase-mediated cleavage in oocytes specifically during meiosis I. Has a crucial role in protecting REC8 at centromeres from cleavage by separase. During meiosis, protects centromeric cohesion complexes until metaphase II/anaphase II transition, preventing premature release of meiosis-specific REC8 cohesin complexes from anaphase I centromeres. Is thus essential for an accurate gametogenesis. May act by targeting PPP2CA to centromeres, thus leading to cohesin dephosphorylation (By similarity). Essential for recruiting KIF2C to the inner centromere and for correcting defective kinetochore attachments.
Sequence similaritiesBelongs to the shugoshin family.
Post-translational modificationsPhosphorylated upon DNA damage, probably by ATM or ATR.
Cellular localizationNucleus. Chromosome > centromere. Chromosome > centromere > kinetochore. During meiosis I, accumulates at centromeres during diplotene, and co-localizes differentially with the cohesin subunits RAD21 and REC8 at metaphase I centromeres. SGO2 and RAD21 change their relative distributions during telophase I when sister-kinetochore association is lost. During meiosis II, it shows a striking tension-dependent redistribution within centromeres throughout chromosome congression during prometaphase II, as it does during mitosis (By similarity). In Hela cells, localizes at centromeres throughout prophase until metaphase and disappears at anaphase. Centromeric localization requires the presence of BUB1 and AUKRB.