{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2023,11,3]],"date-time":"2023-11-03T00:13:26Z","timestamp":1698970406227},"reference-count":65,"publisher":"Wiley","issue":"2","license":[{"start":{"date-parts":[[2013,1,2]],"date-time":"2013-01-02T00:00:00Z","timestamp":1357084800000},"content-version":"vor","delay-in-days":1035,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Journal of Andrology"],"published-print":{"date-parts":[[2010,3,4]]},"abstract":"<jats:p><jats:bold>ABSTRACT: <\/jats:bold> Previously, we described the isolation of a detergent\u2010stable complex from bovine sperm acrosome, termed the outer acrosomal membrane\u2013associated matrix complex (OMC). This stable matrix assembly is associated with the luminal surface of the outer acrosomal membrane and exhibits specific binding activity for acrosin. The present study was undertaken to identify the matrix proteins that specifically interact with acrosomal hydrolases. The OMC fraction exhibited polypeptides of 54, 50, and 45 kd and a major polypeptide family between 38 and 19 kd by sodium dodecyl sulfate polyacrylamide gel electrophoresis. In this study, we purified 45\u2010kd polypeptide, termed OMC45, from the high\u2013pH insoluble fraction of OMC, and the polyclonal antibody was raised against 45\u2010kd polypeptide. Anti\u2010OMC45 polyclonal antibody reacts strongly on immunoblots with the OMC45 band. Using immunofluorescence anti\u2010OMC45 localizes specifically to the acrosomal cap. Two\u2010dimensional polyacrylamide gel electrophoresis and immunoblot analysis of OMC identified a set of approximately 5\u20136 isoelectric variants of 45 kd in the pH range of 5.5\u20137.2. To identify matrix\u2010specific hydrolase\u2010binding proteins, OMC32 (32\u2010kd polypeptide isolated from high\u2010pH soluble fraction of OMC) and OMC45 polypeptides were coupled to AminoLink Plus resin separately and incubated with soluble acrosomal hydrolases. Acrosin and N\u2010acetylglucosaminidase bound the OMC32 polypeptide in a concentration\u2010dependent fashion. In contrast, OMC45 polypeptide exhibited stronger affinity to acrosin than N\u2010acetylglucosaminidase. The binding specificity of acrosomal matrix proteins to hydrolases strongly suggests that the matrix polypeptides play an important role in the regulation of hydrolase release during the acrosome reaction and could also function during acrosome assembly to target and\/or segregate hydrolases within the acrosome interior.<\/jats:p>","DOI":"10.2164\/jandrol.108.007146","type":"journal-article","created":{"date-parts":[[2010,3,18]],"date-time":"2010-03-18T21:45:27Z","timestamp":1268948727000},"page":"177-187","source":"Crossref","is-referenced-by-count":7,"title":["Identification of Acrosomal Matrix\u2013Specific Hydrolases Binding Proteins of Bovine Cauda Epididymal Spermatozoa"],"prefix":"10.1002","volume":"31","author":[{"given":"Subir K.","family":"Nagdas","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Shatasha 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