Testican 1 (TIC1)

TIC1 encodes the protein core of a seminal plasma proteoglycan containing chondroitin- and heparan-sulfate chains. The protein's function is unknown, although similarity to thyropin-type cysteine protease-inhibitors suggests its function may be related to protease inhibition.The SPOCK cDNA encodes a deduced 439-amino acid protein with a predicted N-terminal signal sequence and 2 consensus glycosaminoglycan attachment sites. SPOCK, which contains osteonectin-like domains, a Kazal-like sequence, and a cys-trp-cys-val (CWCV) domain, is related to protein families that are involved in adhesion, migration, and cell proliferation.In situ hybridization showed that mouse Spock1 is located predominantly in a subpopulation of pyramidal neurons in the CA3 area of the hippocampus.